Velocity Europe 2011 Speakers

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.

Arnaud Becart

After graduation and research in the field of Quality of Service for IP networks, Arnaud joined ip-label in 2006 as a Technical Account Manager, dealing with implementation, training and customer care for its end-user monitoring solutions. After 2 years of technical engineering, he moved to a business development role, working as a Presales Engineer for direct and indirect customers, supporting ip-label’s European network of partners. In 2010, Arnaud took over the product management of Datametrie, an End-User monitoring solution developed by ip-label as a Software as a Service which has been used since 2000 to monitor web, business, mobile, voice and video applications. As a Product Specialist and an International Presales Engineer, Arnaud has developed strong skills in the field of Web and Application performance... Read More.

Artur Bergman

Artur Bergman is the Founder and CEO of Fastly.

Joshua Bixby
Joshua Bixby (Strangeloop Networks), @joshuabixby

As president of Strangeloop Networks – a leader in providing web content optimization (WCO) solutions to companies like Petco, Travelocity and O’Reilly Media – Joshua examines acceleration issues from a broad range of perspectives, from technical to human factors. Prior to founding Strangeloop, he co-founded and served as President and CEO of IronPoint Technology, helping lead the company to successful acquisition by The Active Network in 2006. Joshua also served as Senior Vice President, Marketing and Product Development, at NTS Internet Solutions, after having held senior marketing and product roles at MNK and GRAPAD.

Andreas Bovens
Andreas Bovens (Opera Software), @andreasbovens

Andreas Bovens is based in Oslo, from where he heads up Opera Software’s Developer Relations team. The team evangelizes open web standards, takes care of product management of developer tools such as Opera Dragonfly and the Opera Mobile Emulator, and focuses on solving compatibility issues so sites work well in all Opera browsers.

In a previous life, Andreas did a masters in Japanese studies, researched Japanese copyright law at Meiji and Keio University, and was a QA engineer and web evangelist at Opera’s Tokyo office. He loves espresso, and picks up his banjo from time to time.

Michael Brunton-Spall
Michael Brunton-Spall (Guardian News and Media), @bruntonspall

Michael Brunton-Spall is the Developer Advocate for the Guardian. He has worked at the Guardian for three years now, helping to build and scale the website. He has spent a lot of time helping to setup and run the platform team that manages internal, behind the scenes, performance and scalability issues.
As a Developer Advocate, Michael speaks at conferences, organises conferences, supports users of the API’s and does training.

Mathias Bynens

Mathias Bynens (@mathias) works as a freelance web developer in Belgium. He likes HTML, CSS, JavaScript and WPO. To help with those last two things, he created jsPerf <>.

Robert Castley
Robert Castley (Keynote Systems), @RobertCastley

Robert Castley is the Lead Solutions Consultant for EMEA at Keynote. Prior to working at Keynote, Robert worked as a Professional Services Consultant at a document management company, Macro 4, where he worked on developing custom web interfaces.
Robert is passionate about web performance and optimisation and has over 10 years of web development experience. One of his proudest achievements is developing one of the world’s most popular Open Source Content Management Systems to the masses – Mambo, which now lives on as Joomla!

Laurie Denness
Laurie Denness (Bloomberg LP), @lozzd

Laurie Denness is a British Technical Team Lead, currently working at Bloomberg LP, previously staff operations engineer at Etsy. He can often be seen looking at or creating graphs, stalking his coworkers to collect on-call sleep-habit data, or using multiple CDNs for fun and profit. Laurie likes graphs, Hadoop clusters, monitoring, and sarcasm. He once wore a onesie while giving a talk about how on-calls affect your employees and ways to fix it at 2014’s Velocity CA. Earlier in his career, he enjoyed streaming mp3s to millions of people at

Brian Doll
Brian Doll (SourceClear), @briandoll

Brian Doll has been building things on the web since the paleolithic days of sticks, mud and cgi-bin. These days he enjoys such luxuries as Ruby, Rails and jQuery.

Brian enjoys writing and speaking on lean engineering, systems architecture and scalability while helping teams all over the world scale their apps at New Relic.

Evan Elias

Evan is a senior engineer at Tumblr, where he develops database solutions that scale to tens of billions of rows spanning over 100 MySQL installations. He has previously worked at Six Apart and Harvard University, and his software is used by major publications such as The New Yorker and Consumer Reports. He is intimately familiar with the internals of four major blogging platforms, and has been developing online software since the days of dial-up bulletin board systems.

Tony Gentilcore

Tony Gentilcore is a Software Engineer at Google.

There, he has worked on web search performance and now spends most of his day hacking on Chrome and WebKit. He enjoys making the web faster and to that end: participates in the web standards, wrote chapter for “Even Faster Web Sites” and helped create Page Speed and Web Page Replay.

Andreas Grabner

Andreas Grabner has 10 years experience as an architect and developer in the Java and .NET space. In his current role, Andi works as a Technology Strategist for dynaTrace Software in the Methods and Technology team. In his role he influences the dynaTrace product strategy and works closely with customers in implementing performance management solutions across the entire application lifecycle. He is a frequent speaker at technology conferences on performance and architecture related topics and regularly publishes articles blogs on

Bradley Heilbrun
Bradley Heilbrun (YouTube/Google Inc), @nurblieh

YouTube’s first ops engineer. Currently a Google SRE based in Paris and still serving cat videos.

Chris Heilmann
Chris Heilmann (Mozilla Firefox), @codepo8

Chris Heilmann, Principal Developer Evangelist at Mozilla

Chris Heilmann has dedicated a lot of his time making the web better. Originally coming from a radio journalism background, he built his first web site from scratch around 1997 and spent the following years working on lots of large, international web sites, spent a few years in Yahoo building products and explaining and training people and is now at Mozilla. Chris wrote two and contributed to 4 books on web development and wrote dozens of articles and hundreds of blog posts for Ajaxian, Smashingmag, Yahoo, Mozilla, ScriptJunkie and his own blog He also uses Twitter obsessively as @codepo8.

Jon Jenkins
Jon Jenkins (, @jonjenk

Jon Jenkins is the Director of Platform Analysis at He leads a team focused on designing and implementing highly-available architectures capable of operating within tight performance requirements at massive scale with minimal human intervention. Jon still loves getting his hands dirty and can’t resist the thrill of solving emergent problems. Prior to joining Amazon Jon spent time at several startups and he has a strong background in personalization technologies.

Ingmar Krusch
Ingmar Krusch (ImmobilienScout24), @IngmarKrusch

Ingmar Krusch is a teamlead of Sysadmins and Systemdevelopers at germany’s leading real estate search portal.

Through his former life as a developer and teamlead of developers, he first got in contact with the agile mindset through Scrum. Ingmar started to implement Scrum at his employer as a dev teamlead and broadened his agile mindset with DevOps and Kanban trough his work in the ops realm, first as a systems architect and now as an ops teamlead.

Currently he is implementing Kanban and promoting the DevOps mindset and culture at his employer while implementing a continuous delivery platform (CDP). ImmobilienScout24 uses this CDP to deploy 800+ VMs completely (including configuration) via RPMs.


You can reach him via... Read More.

William Louth
William Louth (Autoletics BV), @autoletics

William is the product architect of JINSPIRED’s innovative application performance management
and resource metering solution – JXInsight/OpenCore. OpenCore is the first production-ready activity based costing and multi-resource metering & charge back solution that spans the complete application lifecycle supporting enterprise, grid and the cloud computing platforms. He has previously worked for Borland and has provided technical advisory consultancy to many of the leading JVM & IT management vendors in the area of
performance management, software runtime visualization, application deployment tooling and CMDB R&D.

Johannes Mainusch
Johannes Mainusch (XING AG)

As Vice President Operations, Dr. Johannes Mainusch supports technical development and ensures smooth operation of the XING platform, a high-traffic site with more than 11 million members worldwide. Johannes has vast experience in iterative and agile project methods acquired over many years as project head at Lufthansa Systems and as a freelance consultant for various logistics companies and a number of other industrial firms. His wide-ranging expertise in all programming languages, databases, and infrastructure components means that Johannes is able to analyze and optimize complex IT systems with a view to improving their performance and enhancing their development.

David Mandelin
David Mandelin (Mozilla Corporation), @dmandelin

David Mandelin manages the JavaScript engine team and Mozilla, and is also the module owner of SpiderMonkey, Firefox’s JavaScript engine. Before that, he was project leader for JaegerMonkey, the new JavaScript JIT in Firefox 4. Previously, he has done work on TraceMonkey, JavaScript performance, measurements, static analysis, miscellaneous programming language research, business web application development, and random programming.

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.

Tim Morrow
Tim Morrow (Betfair), @timmorrow

Tim Morrow is Head of Channels at Betfair, responsible for the delivery of Betfair’s next-generation web site platform, focusing on performance, availability and the capability to continuous deliver business value at a rapid pace.

Tim has over 11 years of experience leading teams to design and build websites and systems using Java and related technologies. Prior to joining Betfair, Tim worked as an Architect at Shopzilla delivering their consumer facing website platform. In addition, Tim has also worked at Qualcomm developing software to support the provisioning of mobile devices and delivery of applications to mobile devices in the Wireless Business Division. Tim also thrived in the entrepreneurial environment during years 2000-2004 of startup, . As a key contributor to the startup team, Tim designed... Read More.

Patrick Mueller
Patrick Mueller (IBM, Apache), @pmuellr

Patrick Mueller is a software developer at IBM in the Research Triangle Park area of North Carolina. He’s been working on web software and mobile software for a long time, in many languages, across many OSes.

David Mytton
David Mytton (Server Density), @davidmytton
  • PHP/Python programmer for 10 years.
  • Founder of a hosted server monitoring service.
  • Built the original code and server infrastructure behind the application which is now processing over 1bn documents (7TB data) each month.
  • Use MongoDB extensively as our primary data store, deployed across 50 servers on the Terremark Enterprise Cloud.
  • Spoken about MongoDB at multiple conferences including MongoUK 2010, MongoSV 2010, MongoUK 2011, MongoSF 2011, HN London May 2011 and Cassandra London July 2011. I run the London MongoDB User Group.
Andrew Oates (Google)

Andrew Oates is a Software Engineer on the Page Speed Team in Google’s Cambridge, Massachusetts office. You can find him in the credits for the Pixar film Up.

Aaron Peters
Aaron Peters (TurboBytes), @aaronpeters

Web performance optimization consultant. Founder of Snowboarder. Dad. Born in the USA, lives in The Netherlands.

Matas Petrikas

Matas Petrikas spent most of the last decade developing web projects for global corporations, German government, athletes and artists. In the early 2008 he has joined a Berlin startup SoundCloud as a lead web developer building world’s most active web audio platform. Now Matas is a product manager responsible for the HTML5 applications at SoundCloud.

VP of Product and Development at Vimeo

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.

Schlomo Schapiro
Schlomo Schapiro (ImmobilienScout24), @schlomoschapiro

Schlomo Schapiro works as a Systems Architect and Open Source Evangelist at ImmobilienScout24, the leading German real estate market place. Core areas of interest are open source solutions and web operations.

The ImmobilienScout24 web platform is based on Linux, Apache, Tomcat and open standards. We are currently creating a new deployment and management solution for our data center based on RPM packages.

Schlomo maintains several successful open source projects and is a regular speaker at various conferences. Schlomo is a strong DevOps and web operations advocate and writes regularly for German IT magazines and his BLOG.

Greg Schechter

Greg is a fearless web warrior, fighting for browser and website progress. While training at the University of Illinois in Urbana-Champaign, he published articles with the Opera Web Standards Curriculum. Subsequently, he went on to battle alongside many different web companies, including Amazon, Yahoo, and Google. His current alliance is with YouTube, where he spearheads the movement for HTML5 video capabilities.

Theo Schlossnagle

TTheo Schlossnagle is a Founder and Principal at OmniTI where he designs and implements scalable solutions for highly trafficked sites and other clients in need of sound, scalable architectural engineering. He is the architect of the highly scalable Ecelerity mail transport agent. Theo is a participant in various open source communities including OpenSolaris, Linux, Apache, PostgreSQL, perl, and many others. He is a published author in the area of scalability and distributed systems as well as a veteran speaker in the open source conference circuit.

Theo founded several successful startups as engineering focused organizations including: OmniTI, Circonus, Message Systems and Fontdeck.

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.

Matthew Steele
Matthew Steele (Google)

Matthew is a software engineer at Google, working on Page Speed.

Cosimo Streppone
Cosimo Streppone (Opera Software ASA), @cstrep

Cosimo moved to Norway to join Opera Software 4 years ago.

Working as Lead Developer in the small team, he’s been responsible of the architecture, development, scalability and performance of the site.

Now he works in the Core Services team, helping develop, scale and occasionally crash web apps used by many every day.

Ivo Teel
Ivo Teel (Riot Games), @calimonk

Long before becoming Spil Games’ CTO, Ivo was a gamer—it’s what first pulled him online in 1996 and fueled his love for technology. With a degree in computer science and engineering plus several years’ experience running a large-scale IRC network (Axenet), he joined Spil in 2002. Since then he has performed various roles in the company, from programmer to systems engineer, gaining vast knowledge and experience of both the online-gaming industry and the company’s technological needs. Well-acquainted with the ins and outs of Spil Games, Ivo drives the company’s technical vision and strategy.

Stephen Thair
Stephen Thair (DevOpsGuys), @TheOpsMgr

Technical consultant at my own freelance consulting company specialising in web operations and performance – Seriti Consulting

I have been a web infrastructure architect at BNP Paribas, CSFB & Vodafone as well as Web Operations Manager for Totaljobs and TES.

I am the Community Organiser for the LDNWEbPerf meetup group in London, England Meetup

I blog over here and you can follow me on Twitter TheOpsMgr

Jeroen Tjepkema

Jeroen Tjepkema is the co-founder and CEO of MeasureWorks, providing web performance management solutions. MeasureWorks measures, analyzes and improves the end user experience of retail, financials, travel agencies and other online services. For all, their online services are perceived as mission critical to reach their business goals. By observing their visitors closely, we find out how user experience impacts conversion. And then enable our customers to manage their online presence proactively.

Prior to MeasureWorks, Jeroen worked as a principal analyst and program manager for several European enterprise companies, from the roll-out of cable internet and digital television in the late ’90s to the development and implementation of one of the largest online banking solutions in Europe. For more info check LinkedIN:

Ramon van Alteren

Large scale system administrator / infrastructure developer working at the primier dutch social network.

Lisa van Gelder
Lisa van Gelder (Guardian News and Media), @techbint

Lisa van Gelder is one of the Guardian’s senior web developers. Lisa has been developing software for 12 years and has been involved in building and scaling the Guardian’s main website as well as the comments system. Lisa has worked closely with Operations to diagnose and debug apps in production and is experienced in supporting the cleanup and diagnosis of major performance issues.

Laurens van Hees
Laurens van Hees (SPIL GAMES), @lvanhees

Laurens started as a PHP Developer within SPIL Games, gradually growing towards doing front-end related work. He became increasingly interested in Performance, driving initiatives to improve page load times. He now drives the Performance initiatives within SPIL Games as a dedicated Performance Engineer, working closely with the development teams to guide, mentor and support them in our continuous performance improvements.

Jeff Veen
Jeff Veen (True Ventures), @veen

Jeff Veen is a design partner at True Ventures, where he spends his time helping companies create better products. He does this as an advisor, as well, for companies including, Medium, and WordPress. Previously, Jeff was VP of design at Adobe after they acquired Typekit, the company he cofounded and ran as CEO. He was also one of the founding partners of the user experience consulting group Adaptive Path. While there, he led Measure Map, which was acquired by Google. During his time at Google, Jeff redesigned Google Analytics and led the UX team for Google’s apps. Much earlier, Jeff was part of the founding web team at WIRED magazine, where he helped build HotWired, Web Monkey, Wired News, and many other... Read More.

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, Yahoo! and Apple, among others. Estelle provides tutorials and detailed grids of CSS3 and HTML5 browser support in her blog at She is the author of Mobile HTML5 (O’Reilly, Oct. 2011) and HTML5 and CSS3 for the Real World (Sitepoint, May 2011). While not coding, she works in construction, de-hippifying her 1960’s throwback abode.



  • ip-label
  • Compuware Corporation
  • dynaTrace
  • Keynote Systems
  • New Relic
  • Citrix Systems
  • Google
  • Apica
  • AppDynamics
  • CDNetworks
  • Cotendo
  • Dyn Inc.
  • ImmobilienScout24
  • Spil Games
  • Dyn Inc.

For information on exhibition and sponsorship opportunities at the conference, contact Gloria Lombardo at

View a list of Velocity Europe contacts