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Velocity Speakers

New speakers are added regularly. Please check back to see the latest updates to the agenda.

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John Allspaw
John Allspaw (Adaptive Capacity Labs), @allspaw

John Allspaw has worked in software systems engineering and operations for twenty years in many different environments: biotech, government, online media, social networking, and e-commerce. He started out tuning parallel clusters running vehicle crash simulations for the U.S. government, and then moved on to the Internet in 1997. He built the backing infrastructure at,, Friendster, and Flickr, and Etsy. He served as SVP of Engineering and then Chief Technology Officer at Etsy, and holds an MSc in Human Factors and Systems Safety from Lund University.

Khalid Almutari
Khalid Almutari (WireFilter), @lafikl

A 21-year-old, back-end and front-end engineer from Saudi Arabia, Khalid’s day job is a Full-Stack engineer at WireFilter working on the customer-facing web tools that they provide for their customers. More than 80% of the internet traffic in the region goes through their machines, efficiently handling billions of requests daily.

At night, Khalid works at Crafted-Apps (his own startup) building products, or working with clients to improve their web apps performance and architecture, and transforming their ideas from concepts to a reality.

He also enjoys building open-source projects that help developers build faster web apps, such as Steady.js, PerfBar, and other projects on Github.

Kent Alstad
Kent Alstad (Radware Canada), @kentalstad

Kent is an entrepreneur, software architect, and technology innovator. Before taking the role of VP Acceleration at Radware, Kent was CTO at Strangeloop Networks, where he was instrumental in authoring all of Strangeloop’s issued and pending patents. Prior to helping create Strangeloop, he served as CTO at IronPoint Technology. Kent also founded Eclipse Software, a Microsoft Certified Solution Provider, which he sold to Discovery Software in 2001.

In more than 25 years of professional development, Kent has served as architect and lead developer for successful production solutions with The Active Network, ADP, Lucent, Microsoft, and NCS. ”Port View”, an application Kent architected for the Port of Vancouver, was honoured as Best Administrative System at the 1996 Windows World Open Competition.

Matt Andrews
Matt Andrews (Financial Times), @andrewsmatt

Matt started his web development career as a freelancer creating websites for music festivals and even one of the original members of The Rolling Stones – and now works for the Financial Times on the FT Web app, one of the most successful cross platform HTML5 offline web apps. He also writes a tutorial column for the FT Labs website on building using HTML5 offline technologies.

Yavor Atanasov

Yavor is a software engineer who has in-depth experience within the whole spectrum of web development at a very large scale.
He is from Bulgaria, living and working in London UK.
Part of BBC’s central Platform Team, working with a wide range of technologies and languages.
Currently building BBC’s next generation cloud based platform and continuous delivery pipeline using Amazon Web Services.
Pioneering continuous delivery and dev-ops culture within the development teams. Above all, having fun.

Tobias Baldauf
Tobias Baldauf (Akamai Technologies), @tbaldauf

Tobias Baldauf is a web performance solutions architect and passionate consultant at Akamai Technologies. He created open source web performance measurement tools, ISO certified interfaces as well as a JPEG compressor. He gives talks on web performance and organizes the Cologne Web Performance meetup.

Mark Barnes
Mark Barnes (Financial Times)

Mark is responsible for the Integration team at the Financial Times and has led many projects in monitoring, disaster recovery and decommissioning. He has over 15 years industry experience, starting off as a very average *NIX sysadmin. That said he does have a knack for getting things done and a passion for turning off the old stuff that people would like to forget about.

Mateus Bartz
Mateus Bartz (Telefónica)

Internet and IT professional with +10 years managing a broad range of technologies in large-scale and mission-critical environments, while leading all stages of service design and service delivery, including requirements definitions, design, architecture, deployment, testing, operations, maintenance and support. People skills and active in influence and motivate. Brazilian with native Portuguese speaking, English and Spanish speaking.

Hooman Beheshti
Hooman Beheshti (Fastly)

Hooman Beheshti is vice president of technology at Fastly, where he develops web performance services for the world’s smartest CDN platform. A pioneer in the application acceleration space, Hooman helped design one of the original load balancers while at Radware and has held senior technology positions with Strangeloop Networks and Crescendo Networks. He has worked on the core technologies that make the internet work faster for nearly 20 years and is an expert and frequent speaker on the subjects of load balancing, application performance, and content delivery networks.

Colin Bendell

Colin Bendell

Colin is a multi disciplined expert in software development, infrastructure & operations and business strategy. With over 15 years experience, he has led the design of large scale distributed web applications in Real Estate, and Heavy Equipment. Over the last 3 years he has also managed datacenter and network Infrastructure and Operations team for a global uranium mining company. For several years, Colin also owned and operated an automotive aluminum wheel repair shop where he applied his business knowledge and operational insight.

Colin is passionate about helping customer build high performance web applications that reduce operational complexity and help increase profits. He has a deep technical base and can be found refactoring regular expressions while imagining three impossible things all before... Read More.

Uwe Beßle
Uwe Beßle (iteratec GmbH)

Uwe was born 1965 in Berlin. He studied in Budapest from 1983 to 1988 and finished with a master degree in electrical engineering.

From 1988 until now he worked for different software companies in different roles.

Since 2003 he is senior IT consultant at iteratec with a focus on IT architecture and non-functional requirements.

Andrew Betts

Andrew is a developer, web standards advocate and founder of FT Labs, an emerging web technologies division of the Financial Times. His area of expertise is emerging web technologies, particularly on mobile and tablet platforms, where his team created the FT web app, now well known globally as one of the best examples of what can be achieved with HTML5.

Buddy Brewer

Buddy Brewer is VP Engineering responsible for SOASTA mPulse. Prior to SOASTA, he co-founded Real User Measurement company, LogNormal which was acquired by SOASTA in 2012. Prior to LogNormal, Buddy spent ten years in the web performance industry building synthetic monitoring tools helping the world’s largest web sites solve their performance challenges.

Michael Brunton-Spall
Michael Brunton-Spall (Bruntonspall Ltd), @bruntonspall

Michael Brunton-Spall is a technical architect working for the Government Digital Service, a service in the Cabinet Office of the UK Government.

He works as a consulting architect with a variety of government departments, helping them understand and implement agile, devops, service operation and modern web architectures.

Previously Michael was a developer, developer advocate and senior engineer for the Guardian newspaper. He worked at the Guardian for six years, helping to build and scale the website, plan and build their API offerings and be enthusiastic at a variety of event.

Laine Campbell

Laine Campbell is the senior director of production engineering at Fastly. An operations and database reliability veteran with 19 years of production experience under her belt, Laine has established her experience and knowledge while working with such systems and organizations as Travelocity, Obama for America, Activision, Apple, LiveJournal, Chegg, Adobe, Disney Mobile, Zendesk, and Okta. She has a passion for technical leadership and has served as leadership and strategy support for high-performing SRE, operations, and database organizations. Laine is the lead coauthor for Database Reliability Engineering from O’Reilly.

Adam Christian
Adam Christian (Sauce Labs Inc), @admc

Adam studied Business and Computer Science, followed by an intense Javascript and Python development education working at the Open Source Applications Foundation in San Francisco. He then went on to build front-end automation testing tools for Slide and Mozilla before landing at Sauce Labs as a Javascript and Web Developer. He continued with Sauce Labs, running first the front-end development team, and then taking over the Engineering organization. During the last 4+ years, the company has grown quickly in regards to users, customers and headcount – and continues to do so.

Marni Cohen
Marni Cohen (Puppet Labs)

Marni Cohen is a bi-coastal English major who has been at Puppet Labs for for a year. She is a Desktop Support Engineer by day and a video game designer by night. At Puppet Labs, you can find her automating all the things, building documentation and calendar tools, and gamifying the office map. When she’s not at Puppet, you can find her building queer video games and skating in roller derby.

Jon Cowie

Jon Cowie is a senior operations engineer at Etsy where he mixes his love of both coding and operations to try and solve interesting problems. He has created and open sourced a number of projects, including the Chef tools knife-spork and knife-preflight, and has spoken at several of O’Reilly’s Velocity conferences. He’s currently working on the upcoming O’Reilly book Customizing Chef (

Cliff Crocker

Cliff Crocker is a product line director at Akamai Technologies, where he spends his time building product strategy for performance analytics. Previously, he was vice president of product at SOASTA and engineering leader for the performance, reliability, and site analytics initiatives at @WalmartLabs. Cliff is an active contributor in the web performance community, evangelizing the importance of speed as it relates to user behavior and ultimately business ROI. In his spare time, he enjoys skiing in the mountains of Colorado, where he resides with his wife and two boys.

Mehdi Daoudi
Mehdi Daoudi (Catchpoint), @mdaoudi

Mehdi Daoudi is the founder and CEO of Catchpoint, the industry’s fastest-growing web performance monitoring solution. Before Catchpoint, Mehdi spent 10+ years at DoubleClick and Google, where he was responsible for quality of services, buying, building, deploying, and using various internal and external monitoring solutions to keep an eye on the ad-serving infrastructure delivering billions of transactions a day using thousands of servers, routers, and various other systems.

Andy Davies
Andy Davies (NCC Group), @andydavies

Andy is Associate Director for Web Performance at NCC Group, where he helps clients to measure and improve the performance of their sites.

He wrote ‘The Pocket Guide to Web Performance’ for Five Simple Steps, and is currently co-authoring ‘Using WebPagetest’ for O’Reilly.

Stephen de Vries
Stephen de Vries (ContinuumSecurity), @stephendv

Stephen founded ContinuumSecurity and the open source BDD-Security project with the goals of integrating security into software development. He is a 13 year application security veteran having worked as a consultant at KPMG, Internet Security Systems and Corsaire.

He’s currently focussed on building tools to support security in the software development lifecycle and provides security training for developers and QA staff.

Stephen has presented at popular security conferences including Blackhat USA/Europe, Hack in the Box, OWASP and at developer conferences such as Devoxx.

Brian Doll
Brian Doll (SourceClear), @briandoll

Brian is the Vice President of Strategy at GitHub, focusing on defining and communicating GitHub’s business, product, and corporate strategy.

Brian has been building and selling things online since the mid-nineties, and has held leadership positions in both business and technical roles in the software, eCommerce, and financial services industries. Always the optimist, Brian believes we’re only just beginning to apply the power of the internet to improve the world.

Perry Dyball
Perry Dyball (Seatwave Ltd)

Perry Dyball joined as Ecommerce Operations Manager in 2008. He moved into Web Operations from strong DBA and Database Development roles at and His prior internet experience includes co-founding a software house serving UK Government departments and commercial operations such as Sony Music and

Areas of expertise include all aspects of web Infrastructure design and data centre management specialising in web optimization and capacity, F5 load balancing, web server farms and backend databases especially in a Microsoft .NET/SQL server environment.

His IT career started as a mainframe programmer working in local government and progressed though to technical project management for Datastream (now part of Thomson Reuters) where he built a number of stock market analysis systems. He then... Read More.

Klaus Enzenhofer

Klaus Enzenhofer has over five years of experience and expertise in the fields of web performance optimisation and user experience management. He works as director of the Centre of Excellence team at Dynatrace. In this role, he influences the development of the Application Performance Management solution, focusing on real user monitoring of web and mobile applications. He is a regular speaker at technology conferences on real user monitoring and performance-related topics, and has also written many articles and blogs that that been published in print and online publications.

Ben Evans
Ben Evans (jClarity), @kittylyst

Ben Evans is cofounder of jClarity, a startup that makes performance tools for development and ops teams. Previously, Ben was chief architect for listed derivatives at Deutsche Bank, performance tested the Google IPO, worked on the initial UK trials of 3G networks with BT, built award-winning websites for some of Hollywood’s biggest hits of the ‘90s, developed some of the UK’s very first true ecommerce websites, and provided technology to help some of the UK’s most vulnerable people. Before joining the tech industry, Ben was a researcher in theoretical physics, working on theories that are now being tested at the LHC. Ben helps to run the London Java Community and represents the user community as a voting member on Java’s governing body, the... Read More.

Tammy Everts
Tammy Everts (SpeedCurve), @tameverts

As a senior researcher, writer, and performance evangelist at Radware, I’ve spent the past few years researching the technical, business, and human sides of web/application performance, and sharing the findings via countless blog posts, presentations, case studies, articles, reports, and infographics. Before joining Radware, I was research lead and senior writer at Strangeloop Networks (which was acquired by Radware in early 2013).

I blog at both the Radware blog and Web Performance Today.

Max Firtman
Max Firtman (ITMaster Professional Training), @firt

Max Firtman is a mobile+web developer, trainer, speaker and writer. He wrote many books, including “Programming the Mobile Web” (available in second edition) and “jQuery Mobile: Up and Running” published by O’Reilly Media.

He is a well-known professional in the mobile web community blogging about mobile web platforms on and keeping updated the compatibility tables at

He is a frequent speaker at conferences, including QCon, Mobilism, OSCON, Velocity Conference, Fluent, Google Developer Day, JSConf, GOTO, AdobeCamp and many other events around the world.

He has received different recognitions, including Adobe Community Professional, Microsoft IE User Agent, Nokia Developer Champion and BlackBerry Elite for this work in the mobile web community.

He also teaches mobile HTML5 and performance trainings for top companies... Read More.

Pamela Fox
Pamela Fox (Khan Academy), @pamelafox

Pamela Fox loves to learn, teach, create, and every combination of those. During the day, she creates the programming curriculum for Khan Academy, to teach the next generation of programmers. On the side, she teaches web development classes for the GirlDevelopIt San Francisco chapter. Before that, she was a frontend engineer at Coursera, a developer advocate at Google, and a graduate from USC’s Computer Science Department.

Ryan Frantz

Ryan is a Senior Operations Engineer at Etsy. He loves to solve puzzles, play with his kids’ Legos, and learn new things. Like the harmonica.

Lyza Gardner
Lyza Gardner (Cloud Four), @lyzadanger

Lyza Danger Gardner is a dev. Since co-founding Portland, Ore.-based mobile web start-up Cloud Four ( in 2007, Lyza has tortured and thrilled herself with the intricate ins and outs of the bazillion devices and browsers now accessing the web globally. Lyza and co-founder Jason Grigsby are the authors of Head First Mobile Web (O’Reilly).

Abelardo  Gonzalez
Abelardo Gonzalez (Keynote Systems)

Abelardo Gonzalez is the Director of Product Management for Monitoring at Keynote focusing on identifying disruptive trends and innovative product initiatives in the enterprise. His primary responsibilities include leading Keynote’s Web and Mobile Web Active monitoring as well as the Real User Monitoring products.

Abelardo is a leading expert in web and mobile performance with over 13 years of industry experience. He holds a masters degree from Governors State University, and earned his Bachelor of Arts degree from St. Edward’s University. Abelardo regularly contributes to technology publications such as Internet Retailer & Hospitality Technology Magazine. Follow him on Twitter:@abelg78

Kevin Grandon

Kevin is an open web engineer at Mozilla. He helped launch FirefoxOS 1.0 and is now moving the web forward with products such as FirefoxOS and web standards.

Ilya Grigorik

Ilya Grigorik is a web performance engineer and developer advocate at Google, where his focus is on making the web fast and driving adoption of performance best practices.

Larry Haig
Larry Haig (Intechnica)

An end-user monitoring specialist, Larry spent several years working with Compuware and Gomez, helping large ecommerce businesses such as Home Retail Group and El Corte Ingles. Larry is now a Senior Consultant with Intechnica, who help businesses like Asos, GSK and Channel 4 manage their IT performance.

Wesley Hales

Wesley Hales is an author, occasional speaker and Lead Software Developer at Shape Security.

In his spare time, Wesley works on onslyde and loadreport.js.
You can read his articles, or follow him on twitter @wesleyhales.

Patrick Hamann

Patrick is a senior client-side engineer at the Guardian in London, where amongst other things, he is helping to engineer the next generation of their web platform. When not speaking or ranting about performance or CSS architecture on twitter he enjoys spending his spare time discovering new food and craft beer.

Simon Hearne
Simon Hearne (NCC Group), @simonhearne

Simon is a Web Performance Technical Consultant at NCC Group where his time is split between helping clients improve their web performance and working on exciting new projects.

Simon studied Artificial Intelligence and Web Science before joining NCC Group.

Kelsey Hightower

Kelsey has worn every hat possible throughout his career in tech and enjoys leadership roles focused on making things happen and shipping software.

Kelsey is a strong open source advocate focused on building simple tools that make people smile. When he is not slinging Go code you can catch him giving technical workshops covering everything from Programming, System Administration, and his favorite Linux distro, CoreOS.

Joshua Hoffman
Joshua Hoffman (LeaseWeb), @oshu

A long time system administrator, technical instructor, and hands on leader, Joshua Hoffman has trained ops staff from the west coast to the far east in practical, efficient, and high scale system management and automation.

Now heading up infrastructure at SoundCloud, Hoffman previously worked for Tumblr building data center and system automation tools to enable to company to migrate out of managed hosting.

Prior to Tumblr, Hoffman designed and built Red Hat’s award winning Virtual Training platform and is the author of major portions of their acclaimed System Administration training and certification program.

Lara Hogan
Lara Hogan (Wherewithall), @lara_hogan

Lara Hogan is an engineering leader, coach, and consultant at Wherewithall, and is also the author of Designing for Performance and Demystifying Public Speaking. She champions engineering management as a practice, helps people get comfortable public speaking, and believes it’s important to celebrate career achievements with donuts.

Vanessa Hurst
Vanessa Hurst (CodeMontage), @DBNess

Vanessa is a data-focused developer and the CEO of CodeMontage, which empowers coders to improve their impact on the world. She believes computing is one of the most efficient and effective ways to improve the human experience. She founded Developers for Good and co-founded WriteSpeakCode and Girl Develop It. Previously, she wrangled data at Paperless Post, Capital IQ, and WealthEngine. Vanessa holds a B.S. in Computer Science with a minor in Systems and Information Engineering from the University of Virginia.

Vanessa’s work in technology education and social change has appeared on the TODAY show, NPR, Al Jazeera America, Entrepreneur, The New York Times, Fast Company, and other media. She serves as a cast member for, a... Read More.

Zheng Jia (Baidu), @jz1108

Jia Zheng is a senior front-end engineer at Baidu. He works on the Baidu map team for over 5 years where he is responsible for developing baidu map products including desktop websites, mobile websites and map APIs. He also loves interaction and graphics design. Zheng has a Master’s degree in computer software and theory from University of Science and Technology Beijing.

Nassim Kammah

Nassim Kammah is a Software Engineer on the Test Automation Team at Etsy. Nassim has several years experience building and maintaining Continuous Integration environments for various platforms and languages. Lately, he has been focusing on building the mobile automation infrastructure for the Android and iOS apps at Etsy.

Arun Kejariwal

@arun_kejariwal is currently a Capacity and Performance Engineer at Twitter where he works on research and development of novel techniques to improve the accuracy of capacity models and demand forecasts. Prior to joining Twitter, @arun_kejariwal worked on research and development of practical and statistically rigorous methodologies to deliver high performance, availability and scalability in large scale distributed clusters. Some of the techniques developed have been published in peer-reviewed international conferences/journals.

@arun_kejariwal received his Bachelor’s degree in EE from IIT Delhi and doctorate in CS from UCI.

Jonathan Klein

Jonathan is a software engineer at Etsy, where he focuses on solving web performance and scalability challenges. He started the Boston Web Performance Meetup Group, and contributes to a few open source projects, including WebPagetest, the HTTPArchive and CSSLint. Jonathan blogs regularly at and can be found on Twitter at @jonathanklein.

Nils Kuhn
Nils Kuhn (iteratec GmbH), @iteratec

Nils was born in 1977 in Hamburg city in Germany. From 1999 to 2005 he studied biology in Hamburg and finished with master degree.

From end of study to first years of work he moved from ecology and geoinformatics to software- and database-development. He worked as a software-developer in many different projects with both, web- and desktop-technologies.

Since 2011 he is senior software engineer at iteratec with a focus on web-applications and the monitoring and optimization of web-performance.

Kornel Lesiński

Developer at FT Labs — an emerging web technologies team at the Financial Times.

Participant in web standards development at WHATWG and RICG.

Creator of ImageOptim. Independent image compression researcher and developer of lossy PNG compression tools: pngquant2 and ImageAlpha.

Joshua Marantz

Joshua Marantz is a software engineer at Google, where he is tech-lead of mod_pagespeed, a project to build an open-source Apache module for automatically improving website latency and reducing bandwidth consumption by rewriting HTML, CSS, Javascript, and Images. At Google he has also worked on latency improvements in web caching infrastructure and scalable social networking. Prior to Google, Josh spent 20 years in the Electronic Design Automation industry, much of it working on accelerated functional simulation. He holds BS and MS degrees from MIT, in Computer Science and Engineering, and Electrical Engineering and Computer Science.

Michael McCall
Michael McCall (Akamai Technologies Inc)

Product Architect at Akamai Technologies.

Patrick is currently the Web Operations Manager at Etsy.

Tyler McMullen

Tyler McMullen is CTO of Fastly, where he is responsible for the system architecture and leads the company’s technology vision. As part of the founding team, Tyler built the first versions of Fastly’s instant purging system, API, and real-time analytics. Previously, Tyler worked on text analysis and recommendations at Scribd. A self-described technology curmudgeon, Tyler has experience in everything from web design to kernel development and loathes all of it. Especially distributed systems.

Steve Miller-Jones (Limelight Networks)

Steve has worked in the streaming and content delivery networking (CDN) industry since 2008 and has a strong software project management and web-application programming background. As Director, Product Management for Limelight Networks, he enables Limelight to understand how its services perform from the outside in, and from the inside out. Using “Real User Measurement” data, alongside synthetic and system-wide monitoring services, he leads development of products that ensure consistent high-quality content delivery worldwide. Prior to joining Limelight, he was COO of Global-MIX, which won the Streaming Media “Best CDN in Europe” award in 2009.

Keith Mitchell
Keith Mitchell (EF Education First), @specialized

Keith Mitchell is the Group Engineering Manager within FM Sport and leads the software engineering discipline across a team of around 30 developers, architects and engineers. He is responsible for the development and delivery of the Sport online product across desktop, mobile and native app (iOS, Android, Kindle, Windows Phone) platforms. He obtained both his undergraduate and post-graduate degree at the University of Lancaster before joining BBC Future Media in 2011 as the Technical Lead for London 2012 on Mobile. Following London 2012 he led the development of BBC Sport on mobile web, tablet and native apps before taking up his current role. He currently focusses on Engineering Excellence in order to scale up the engineering team and support continuous delivery of sport... Read More.

Ian Molyneaux
Ian Molyneaux (Intechnica), @ianmoly

Ian Molyneaux has over 30 years’ experience in IT, providing performance consultancy and promoting business-driven performance testing. He joined Intechnica in 2010 as Head of Performance, working with clients such as Irish Life, Permanent TSB and GSK. Prior to this role he held senior performance roles for Compuware and MicroFocus. Ian’s book “The Art of Application Performance Testing” was published by O’Reilly in 2009, and has a growing international community of followers and fans.

Stein Inge Morisbak
Stein Inge Morisbak (Bekk Consulting AS), @steinim

Stein Inge is Practice Lead for Continuous Delivery and Devops at BEKK. He is a true Agile evangelist with 15 years of experience in both contributing to, and helping others to become better at producing excellent software together with demanding customers. He is also an experienced speaker at conferences and the founder of DevOps Norway Meetup.

Courtney Nash

Courtney Nash chairs multiple conferences for O’Reilly Media and is the strategic content director focused on areas of modern web operations, high-performance applications, and security. An erstwhile academic neuroscientist, she is still fascinated by the brain and how it informs our interactions with and expectations of technology. She’s spent 17 years working in the technology industry in a wide variety of roles, ever since moving to Seattle to work at a burgeoning online bookstore. Outside work, Courtney can be found biking, hiking, skiing, and photographing the Cascade Mountains near her home in Bellingham, Washington.

Monica Pal
Monica Pal (Aerospike Inc.), @Raydiate

Monica is an engineer and entrepreneur; she started her career in Apple R&D, building messaging, directory and security products and then went on to build marketing infrastructure and agile teams at a series of startups including enCommerce (acquired by Entrust), LignUp, WSO2, AlienVault and now Aerospike, an open source, flash-optimized, in-Memory NoSQL database.

Monica has a BA in Computer Science from Rice University and an MS in Computer Science from the University of Wisconsin-Madison.

Will Pressly
Will Pressly (EdgeCast), @wbspjr

Will Pressly is a Principal Engineer at Verizon EdgeCast. Pressly leads the team that authors, maintains and operates all DNS and Load Balancer code for EdgeCast’s CDNs and its DNS Product, Route. He is focused on Application Performance/Extensibility/Reliability and Operational Automation.

Prior to joining EdgeCast in late 2010, Will completed a Ph.D. in Computer Science from Clemson University with a focus on Applied Algorithms and a dissertation concerning diagnosis of Epilepsy from EEG data. When not working, Will endeavors, largely successfully, to prevent his small children from critically injuring themselves.

Alois Reitbauer

Alois Reitbauer is chief evangelist at Dynatrace. Alois is fanatic about monitoring, DevOps, and application performance and has spent most of his professional career building monitoring tools and speeding up applications. He is a regular conference speaker, blogger, book author, and sushi maniac.

Mike Rembetsy
Mike Rembetsy (Bloomberg), @mrembetsy

Michael Rembetsy is the Manager of Systems Engineer Bloomberg. He currently over sees all systems level engineering and infrastructure platform engineering with the Bloomberg infrastructure group. He has fostered a culture of learning and mindfulness at Bloomberg. Mike has worked in system operations for over 15 years in the web, healthcare, online media and financial industries. He started out in the help desk area before moving to engineering and has been building and running engineering teams ever since. In previous jobs he worked for Etsy, iVillage, NBC Universal and McDonalds.

Philip Reynolds

Engineering background in both development, build and operations. Internet systems

Carolyn Rowland
Carolyn Rowland (Independent), @unpixie

Carolyn Rowland began working with UNIX in 1986; her professional career as a UNIX system administrator took off in 1991. Carolyn chaired the USENIX LISA ‘12 conference in San Diego in December 2012. Carolyn’s two industry passions continue to be finding new ways to encourage and educate people to enter the operations professions and helping advance women in tech through strong community and sharing of best practices for dealing with existing gender issues in the computing professions.

Aaron Rudger
Aaron Rudger (Keynote LLC), @arudger

Aaron Rudger is a veteran in the Web Performance space with over 15 years of industry experience. As Director of Product Marketing, Aaron leads the product vision, strategy and evangelization for Keynote’s industry leading web and mobile performance and quality solutions.

Prior to Keynote, Aaron held key marketing positions at Right90, BMC Software, Remedy Corporation and His cross industry expertise in CRM, IT Management and eCommerce can be found in industry publications and technology blogs such as NBC News and Website Magazine. Aaron is also a frequent speaker at industry events like Velocity Conference.

Theo Schlossnagle

Theo founded Circonus in 2010, and continues to be its principal architect. After earning undergraduate and graduate degrees from Johns Hopkins University in computer science with a focus on graphics and randomized algorithms in distributed systems, he went on to research resource allocation techniques in distributed systems during four years of post-graduate work. In 1997, Theo founded OmniTI, which has established itself as the go-to source for organizations facing today’s most challenging scalability, performance and security problems. He was also the principal architect of the Momentum MTA, which is now the flagship product of Message Systems.

A widely respected industry thought leader, Theo is the author of Scalable Internet Architectures (Sams) and a frequent speaker at worldwide IT conferences. Theo is a computer scientist... Read More.

Dvir Shapira
Dvir Shapira (Incapsula)

Serving as Product Manager for Incapsula’s cloud-based Application Delivery service, Dvir is responsible for planning and execution of product roadmaps, defining product requirements, setting product positioning and pricing, and leading product development and release efforts.

Dvir has worked for over a decade in management and engineering roles at leading technology companies. Prior to joining Incapsula, he was an R&D project manager at Check Point software technologies, where he led the development and release of a new appliance product line. Earlier in his career, he served as a project manager at Logic Industries and as a system design engineer at Applied Materials.

Dvir earned an MBA as well as B.Sc degrees in Physics and Electrical Engineering from Tel Aviv University.

Steven Shorrock

Steven Shorrock is a chartered ergonomist, human factors specialist, and a chartered psychologist. Steven’s background is in internal and external consultancy in human factors and safety management in several industries and the government; he is also a researcher and educator in academia. Steven is currently a safety and human factors specialist and European safety culture program leader at EUROCONTROL, where he works in countries throughout Europe, and an adjunct senior lecturer at the University of New South Wales School of Aviation in Sydney, Australia.

Steve Souders
Steve Souders (SpeedCurve), @souders

Steve Souders is chief curver at SpeedCurve, where he works on the interplay between performance and design. Steve previously served as Google’s head performance engineer, Yahoo’s chief performance officer, and Fastly’s chief performance officer. Steve pioneered much of the work in the world of web performance. He is the author of High Performance Web Sites and Even Faster Web Sites as well as the creator of many performance tools and services including YSlow, HTTP Archive, Episodes, ControlJS, and Browserscope. Steve taught CS193H: High Performance Web Sites at Stanford and serves as cochair of Velocity, the web performance and operations conference from O’Reilly.

Bruce Spang (Fastly)

Bruce Spang is a software engineer at Fastly, where he focuses on building large-scale distributed systems and improving systems reliability. Bruce helped design and build Fastly’s purging system, improved the speed and reliability of the configuration system, and is working on distributed routing algorithms. Previously, he worked as an engineer at Dribbble, where he worked on performance and search.

James Stewart
James Stewart (, @jystewart

Director of Technology at the UK Government Digital Service, building GOV.UK and making services Digital By Default.

East Londoner. Husband. Father.

Andrew Still
Andrew Still (Intechnica), @andy_still

Andy is co-founder of Intechnica, a vendor independent IT performance consultancy. He recently wrote the O’Reilly-published book “Web Performance Warrior”.

Andy’s main interest is in developing high usage, highly performant websites and helping others to do so.

He also focuses is on improving the integration of performance into every stage of the development cycle with a particular interest in the integration of performance into the CI process.

Andy is one of the organisers of the Web Performance Group North UK and Amazon Web Services NW UK User Group, regularly blogs at Internet Performance Expert and Performance Patterns and started the programming initiative Progvember.

Jeff Sussna
Jeff Sussna (Ingineering.IT), @jeffsussna

Jeff Sussna is Founder and Principal of Ingineering.IT, a boutique consulting firm that facilitates Adaptive IT through teaching, coaching, and strategic design. Jeff has more than 20 years of IT experience, and has led high-performance teams across the Dev/QA/Ops spectrum. He is a highly sought-after speaker, and was recognized as a Top 50 Must-Read IT Blogger for 2012 and 2013 by BizTech Magazine. His interests focus on the intersection of development, operations, design, and business.

Philip Tellis

Philip Tellis is a geek who likes to make the computer do his work for him. As Chief Architect at SOASTA, he analyses the impact of various design decisions on web application performance, scalability and security. He is also the lead developer of “boomerang” — a JavaScript based web performance testing tool.

In his spare time, Philip enjoys cycling, reading, cooking and learning spoken languages.

Philip has spoken at several conferences in the past, including FOSS.IN, FREED.IN, Ubuntulive, Linux Symposium, PHP Quebec, ConFoo, FOSDEM, IPC, WebDU, Velocity and JSConf.

Stephen Thair
Stephen Thair (DevOpsGuys), @TheOpsMgr

Steve loves website operations. He’s pretty much done every job from pulling thin-ethernet cabling through floor spaces, racking servers, deploying websites, killer load testing through to managing high-performing WebOps teams for major UK online brands.

He’s a regular speaker at conferences on web performance and load testing and a general #WebPerf fanatic. Originally from Perth, Australia he’s lived in the UK since 1999 and yes, he does still miss the weather!

Robert Treat

A long time open source user, developer, and advocate, Robert is best known for his work over the years with the PostgreSQL project. Having worked on database backed, internet based systems for over a decade, he is now an author and international speaker on databases, open source, and managing web operations at scale. He spends his days as CEO of OmniTI, a technology consulting firm focused on building and managing highly scalable systems.

Avleen Vig

Avleen is a Staff Operations Engineer at Etsy, where he spends much of his time growing the infrastructure for selling knitted gloves and cross-stitch periodic tables. Before joining Etsy he worked at several large tech companies, including EarthLink and Google, as well as a number of small successful startups.

Almudena Vivanco (Telefónica I+D), @MrsDaehin

I studied Applied Maths at Oviedo University from that time my taste for graphs and numbers. I arrived to Barcelona 11 years ago and started working as .NET programmer. I realized that I am better at discovering issues than at fixing them, and as I am a lazy I started using automatization tools for testing. I am a gamer, i love mmo’s since MUDs and of course i love playing without lag! When i discovered there were people that worked with testing the performance of online services I fell in love and 7 years ago i decided to be a performance test engineer. I worked for,, azkar, and Nowadays i work in Telefónica I+D learning new things every day.

Mandi Walls

Mandi Walls is Technical Practice Manager at Chef. For Chef, she travels the world helping organizations increase their effectiveness using configuration management and modernizing IT practices. Prior to joining Chef, she ran large web properties for AOL, including, and Moviefone. Mandi has a Master’s degree in Computer Science from GWU and an MBA from UNC Kenan-Flagler. She is a regular speaker at technical conferences and is the author of “Building a DevOps Culture”, published by O’Reilly.

Yoav Weiss

Yoav is a Web performance and browser internals specialist, working on responsive design Web performance, image compression and more. He recently implemented the srcset attribute in Blink.

He is an
RICG technical lead, a Blink & WebKit contributor and a bass player.

You can follow his rants on Twitter or have a peek at his latest prototypes on Github.

Estelle Weyl
Estelle Weyl (Instart Logic), @estellevw

Estelle Weyl started her professional life in architecture, then managed teen health programs. In 2000, she took the natural step of becoming a web standardista. She has consulted for Kodakgallery, SurveyMonkey, Samsung, Yahoo! and Apple, among others. Estelle shares esoteric tidbits learned while programming CSS, JavaScript and HTML and detailed grids of CSS3 and HTML5 browser support in her blog at She is the author of Mobile HTML5 and co-author of HTML5 and CSS3 for the Real World. She is currently authoring HTML5: The Definitive Guide and co-authoring CSS3: The definitive guide. While not coding, she works in construction, de-hippifying her 1960’s throwback abode.

Yuval Yeret
Yuval Yeret (AgileSparks), @yuvalyeret

Yuval leads the Kanban/Flow practice for AgileSparks, an international lean agile consulting company based out of Israel. He led several strategic long-term lean/agile initiatives in large enterprises and is one of the leading Kanban Practitioners and Trainers focused on the enterprise product development world. Yuval is a big believer in pragmatic, best-of-breed solution design, taking the best from each approach, avoiding Dogma, therefore it is not a surprise to find him among the leadership of the pragmatic and evolutionary Kanban movement. He recently received the Brickell Key Award for Lean Kanban community excellence, driving Kanban adoption in Israel. He published “Holy Land Kanban” based on his thinking and writing at You can also find him playing national league volleyball in Israel and listening to... Read More.

Mark Zeman
Mark Zeman (SpeedCurve), @markzeman

Mark Zeman is the founder of SpeedCurve a front-end performance monitoring service that gives you continuous feedback on how your front-end code is affecting the performance of your website.

Mark has spent 20 years designing for the web in a variety of roles from Creative Director to University Lecturer, Creative Technologist and Lead developer.