Build resilient systems at scale
28–30 October 2015 • Amsterdam, The Netherlands

Velocity Speakers

New speakers are added continuously. Please check back to see the latest updates to the program.

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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... Read More.

Mike Amundsen
Mike Amundsen (, Inc.), @mamund

Mike Amundsen is an internationally known author and speaker who travels the world discussing network architecture, web development, and the intersection of technology and society. He’s helped companies large and small capitalize on the opportunities provided... Read More.

Taco is a IT engineer with a lot of continuous delivery, Agile/Scrum and DevOps experience. Improving people, processes and techniques is what he constantly does. In the end it’s the results that matter!

Mark Barnes
Mark Barnes (Financial Times)

Mark Barnes 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... Read More.

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... Read More.

Terry Bernstein
Terry Bernstein (Verisign)

Terry Bernstein is the senior product manager for Verisign’s Managed DNS service, and is responsible for the strategy, roadmap, marketing, and sales support of this product. Bernstein has more than 15 years of experience in... Read More.

David Boloker
David Boloker (IBM Corporation)

David Boloker is CTO of IBM’s Emerging Internet Technology group and also holds the title of distinguished engineer. David is also responsible for forming IBM’s technical strategy around the emerging areas of mobile identity and... Read More.

Nathan Bower

Nathan Bower is a senior performance engineer coordinating performance for product development at He’s previously led performance at

James Brooks
James Brooks (Betfair)

James Brooks is a member of the Site Reliability Engineering team at Betfair.

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

Michael Brunton-Spall is an independent security consultant. Previously, Michael was deputy director for technology and operations and head of cybersecurity at the UK Government Digital Service and held a number of jobs ranging from creating low-level... Read More.

Ryn Daniels
Ryn Daniels (HashiCorp), @rynchantress

Ryn Daniels is a staff infrastructure software engineer who got their start in programming with TI-80 calculators back when GeoCities was still cool. Their work has focused on infrastructure operability, sustainable on-call practices, and the design... Read More.

William de Ronde

William de Ronde joined 10 years ago. In the years since, he did a full Tour of Duty in IT: as a developer, project manager, manager technology, and head of operations. His experience combined with... Read More.

Bart De Vylder
Bart De Vylder (CoScale)

Bart De Vylder is a data scientist at CoScale. Previously, Bart was active in software engineering and architecture, with a focus on distributed systems. His interests lie in machine learning and building reliable, scalable data processing... Read More.

Patrick Debois
Burnout in tech Session

Patrick Debois has made a habit of changing both his consultancy role and the domain that he works in: sometimes as a developer, manager, sysadmin, tester, and even as the customer. If there’s one thing that... Read More.

Klaus Enzenhofer

Klaus Enzenhofer has over five years of experience and expertise in the field of web performance optimization and user experience management. He works as a technical strategist in the Centre of Excellence team at Dynatrace. In... Read More.

Matteo Figus
Matteo Figus (OpenTable), @matteofigus

Matteo Figus is an Italian developer based in London, with more than 15 years of experience in writing code. He works at OpenTable, where he writes code, tests, deploys, and monitors it. Matteo’s main interests are... Read More.

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

Max Firtman is a mobile and web developer, trainer, speaker, and writer. Max teaches mobile HTML5 and performance trainings for top companies around the world. The founder of IT-training company ITMaster, Max is a well-known... Read More.

Antoine Guy
Antoine Guy (Viadeo), @viadeo

Antoine Guy is Infrastructure Architect at Viadeo. Previously he spent 15 years operating and designing web infrastructure for websites as well as hosting companies. He specializes in performance, monitoring, datacenters, clouds and always keeps simplicity in... Read More.

Heinrich Hartmann

Heinrich Hartmann is the lead data scientist at Circonus, where he is driving the development of analytics methods that transform monitoring data into actionable information as part of the Circonus monitoring platform. Previously, he worked as... Read More.

Simon Hearne
Simon Hearne (NCC Group), @simonhearne

Simon Hearne is a senior performance consultant at NCC Group, where he splits his time between helping clients improve their web performance and working on exciting new projects. Simon studied artificial intelligence and web science.

... Read More.
Assaf Hefetz
Assaf Hefetz (Snyk)

Assaf Hefetz is the cofounder of, where he builds web security tools for developers. Assaf was previously director of innovation at Supercom, where he led the development and innovation of the company’s security products, and... Read More.

Mark Heistek

Mark Heistek works at ING Netherlands. Evangelizing Continuous Delivery and DevOps within and outside ING . Also part of the DevOps team which is responsable for Continuous Delivery as a Service globally within the... Read More.

Joshua Hoffman
Joshua Hoffman (LeaseWeb), @oshu

An accomplished engineer and technical leader, Joshua Hoffman has trained Ops staff from San Francisco to Hong Kong in practical and efficient high scale system management and automation. Hoffman created Red Hat’s acclaimed Virtual Training platform... Read More.

Lindsay Holmwood
Lindsay Holmwood (Australian Government Digital Transformation Office), @auxesis
Burnout in tech Session

Lindsay Holmwood is a engineering manager living in the Australian Blue Mountains. Lindsay works at the Australian Government’s Digital Transformation Office, building clearer, simpler, faster, more humane public services . A long-time contributor to the open... Read More.

Nic Jansma
Nic Jansma (Akamai), @nicj

Nic Jansma is a software developer at Akamai building high-performance websites, apps, and open source tools.

Scott Jenson

Scott Jenson worked on the Newton at Apple, multiple phone UIs at Symbian, the mobile Maps app at Google, and was a creative director at frog design. He has been writing/speaking about smart devices for many... Read More.

Arun Kejariwal

Arun Kejariwal is an independent lead engineer. Previously, he was he was a statistical learning principal at Machine Zone (MZ), where he led a team of top-tier researchers and worked on research and development of novel... Read More.

Daniel Khan
Daniel Khan (Dynatrace), @dkhan

Daniel Khan has over 15 years of experience as a full stack developer, architect, and technical lead in the field of web engineering, proving his strong problem-solving skills in hundreds of projects. He is passionate about... Read More.

Romeo Kienzler (IBM Zurich)

Romeo Kienzler holds a Master Degree in Information Systems with specialisation in Applied Statistics and Bioinformatics from the Swiss Federal Institute of Technology. He works for IBM Zurich as a chief data scientist and architect.... Read More.

Jonathan Klein

Jonathan is the Director of Engineering at Attend, a Boston startup building event management software. He was formerly a senior software engineer at Etsy, where he focused on solving web performance and scalability challenges. Jonathan started... Read More.

Katie Kovalcin is a designer at Sparkbox. She is the 2014 Net Awards Young Designer of the Year, a teacher for Girl Develop It, and a writer for various publications. She strongly values collaboration with her... Read More.

Bridget Kromhout

Bridget Kromhout is a principal cloud advocate at Microsoft. Her CS degree emphasis was in theory, but she now deals with the concrete (if the cloud can be considered tangible). After 15 years as an operations... Read More.

Bruce Lawson
Bruce Lawson (Opera ASA), @brucel

Bruce Lawson advocates open standards for Opera. He’s been involved in explaining and making web standards since 2002. He co-wrote the first book on HTML5, contributed to the W3C’s Mobile Web Best Practices, and was a... Read More.

Hossein Lotfi
Hossein Lotfi (Google)

As a member of Google networking team, Hossein Lotfi’s passion is to run complex and cross-functional networking programs. Prior to Google Hossein led performance engineering at EdgeCast (a CDN acquired by Verizon), where his full-stack... Read More.

Daniel Maher
Daniel Maher (Mozilla), @phrawzty

Dan is a long-time system administrator – he first installed Linux on his home PC in 1995 and never looked back. A veteran of the original dotcom bubble, he founded a web hosting company in the... Read More.

Lorna Mitchell
Burnout in tech Session

Lorna Mitchell is a Leeds-based developer advocate with IBM Cloud Data Services. She brings her technical expertise on a range of topics to audiences all over the world with her writing and speaking engagements, always... Read More.

Adrian Mouat
Adrian Mouat (Container Solutions), @adrianmouat

Adrian Mouat is the chief scientist for Container Solutions, a pan-European services company that specializes in Docker and Mesos. Adrian has recently developed a Docker-based PaaS solution for a hosting company. He has written several successful... Read More.

Tanay Nagjee
Tanay Nagjee (Electric Cloud), @tanayciousd

As a software engineer for five years, Tanay Nagjee developed several core features of a highly scalable orchestration/automation platform. A generalist at heart, he assumed various responsibilities and especially enjoyed working with customers on real-world use... Read More.

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... Read More.

Andrew Neilson

Andrew Neilson is currently part of the M& delivery team, heading up their PerfOps team, and is responsible for the performance across the breadth of the M& business.

The PerfOps team has evolved from a traditional... Read More.

Adam Onishi
Adam Onishi (Financial Times), @onishiweb

Adam Onishi is a frontend developer working on the Origami team at the Financial Times in London. Adam has a keen interest in CSS and Sass and advocates strongly for accessibility and progressive enhancement when... Read More.

Jakub Pawlowicz
Jakub Pawlowicz (Independent Consultant), @jakubpawlowicz

Jakub Pawlowicz is a web developer, open source contributor, and author of clean-css, one of the most popular CSS optimization tools. He has spent the last 12 years working as a front- and back-end developer,... Read More.

Matt Peterson
Matt Peterson (Cumulus Networks)

Matt Peterson works within the office of the CTO at Cumulus Networks. His primary focus in this role is technical evangelism, after founding the initial customer experience team. Prior to Cumulus, Matt ran datacenter &... Read More.

Stanhope Philip

Phil Stanhope is a Fellow at Dyn, working with the Office of the CTO. Phil oversees the strategy, engineering and operations of Dyn’s Internet Intelligence product line.

Prior to joining Dyn, Phil Stanhope served as... Read More.

Guy Podjarny

Guy Podjarny is Snyk’s co-founder and CEO, focusing on using open source and staying secure. Guy was previously CTO at Akamai following their acquisition of his startup,, and worked on the first web... Read More.

Stijn Polfliet

Stijn Polfliet is the CTO of CoScale, a provider of web performance analytics software. He obtained his Ph.D. in Computer Science at the Ghent University in Belgium, after which he co-founded CoScale, where he leads... Read More.

Samantha Quiñones
Burnout in tech Session

Samantha Quiñones is a polyglot hacker and systems architecture expert. Over the course of her 17-year career, she has built software and led teams for some of the largest names in technology, and she is currently... Read More.

Björn Rabenstein
Björn Rabenstein (Grafana Labs)

Björn Rabenstein is an engineer at Grafana Labs and a Prometheus developer. Previously, he was a production engineer at SoundCloud, a site reliability engineer at Google, and a number cruncher for... Read More.

Alois Reitbauer

Alois Reitbauer is chief evangelist of ruxit. He is a fanatic about monitoring, DevOps, and application performance. He spent most of his professional career in building monitoring tools and speeding up applications. Alois is a regular... Read More.

Gareth Rushgrove

Gareth Rushgrove is a Director of Product at Snyk, working remotely
from Cambridge, UK, helping to build interesting tools for people to
better secure infrastructure and applications. He has previously
worked for the... Read More.

Eleanor Saitta
Eleanor Saitta (Systems Structure Ltd.), @Dymaxion

Eleanor Saitta is a practice lead at Systems Structure Ltd, a security architecture and strategy consultancy with media, finance, healthcare, infrastructure, and software clients across the US and Europe. She’s worked in security for 16 years,... Read More.

JP Schneider (Mozilla), @jdotp

JP was one of five Threadless alums who moved to build President Obama’s reelection technology stack for the 2012 campaign. Since then, he has worked as DevOps/Internet Jedi for Mozilla, helping multiple teams move to modern... Read More.

Alex Schoof

As a security-focused software engineer, Alex Schoof has been designing and building systems ranging from GPU-accelerated network analytics to crypto-hardware-as-a-service offerings for large enterprises, startups, and everything in between. He is currently a principal engineer... Read More.

Baron Schwartz
Baron Schwartz (VividCortex), @xaprb

Baron Schwartz is the founder and CTO of VividCortex, the best way to see what your production database servers are doing. Baron has written a lot of open source software and several books, including High... Read More.

Sophie Shepherd is a senior designer at Ushahidi, a non-profit software company that develops free and open-source products for information collection, visualisation, and interactive mapping. Prior to this, she was a senior designer at Happy Cog,... Read More.

Anna Shipman
Anna Shipman (Government Digital Service), @annashipman

Anna Shipman is a technical architect at the Government Digital Service, doing development, web operations engineering and building platforms. She likes Perl, Go, Ruby and Python. She blogs and is always up for a game... Read More.

Doug Sillars

Doug has been a member of the AT&T Developer Program for the last 10 years. He currently leads a team of outreach engineers who are training developers in best practices for mobile performance. The tools and... Read More.

Julien Simon

Julien Simon is a technical evangelist at AWS. Previously, Julien spent 10 years as a CTO and vice president of engineering at a number of top-tier web startups. He’s particularly interested in all things... Read More.

Rachel Ilan Simpson

Rachel Ilan Simpson is a UX designer on the Google Chrome team, living in Munich, Germany. She’s worked as a freelance interaction designer for a variety of clients (like Drivenow/BMW and Freeletics), as well as... Read More.

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... Read More.

Philip Tellis

Philip Tellis is a geek who likes to make the computer do his work for him. As principal RUM distiller at Akamai, he analyses the impact of various design decisions on web-application performance, scalability, and... Read More.

James Turnbull

James Turnbull is VPE at Glitch. A longtime member of the open source community, James is the author of a number of books about open source software. Previously, he was a CTO in... Read More.

Frederieke Ubels
Frederieke Ubels (

Frederieke Ubels has been working for for 10+ years. As director of IT innovation, she is responsible for continuous improvement of the innovation process at, alignment with business departments, and for the transition to... Read More.

Cor van der Struijf

As Senior Cloud Advisor, Cor van der Struijf helps clients with their business and IT challenges in the Cloud solution domain. For that, he identifies comprehensive, innovative solutions in partnership with clients. His focus is on... Read More.

Mark Vanderwiele
Mark Vanderwiele (IBM Corporation), @MarkVanderwiele

Mark VanderWiele is an IBM distinguished engineer working on emerging cloud technologies. Mark was chief architect for some of the first clouds in IBM and over the last several years has been performing research... Read More.

Jean-Pierre Vincent

Jean-Pierre Vincent has been struggling with browsers since 2000. He has dealt with JavaScript enough to coach, train, and teach on the subject. He was with Yahoo! when web performance became a discipline on its own,... Read More.

Julius Volz
Julius Volz (SoundCloud), @juliusvolz

Julius Volz is a production engineer at SoundCloud and co-founder of the Prometheus project. In the past, he worked as a site reliability engineer in Google’s production offline storage team to back up the internet and... Read More.

Mandy Waite
Mandy Waite (Google), @tekgrrl

Mandy Waite is a developer advocate for the Google Cloud Platform.

Anders Wallgren
Anders Wallgren (Electric Cloud), @anders_wallgren

Anders Wallgren is chief technology officer at Electric Cloud. Anders brings with him over 25 years of in-depth experience designing and building commercial software. Prior to joining Electric Cloud, Anders held executive positions at Aceva, Archistra,... Read More.

Adam Warne (, @ao

Adam Warne has been with for 8 years and has been part of its growth into the successful international retailer it is today. Adam’s previous experience includes delivering IT services at EDS and Skipton... Read More.

Sarah Wells
Sarah Wells (Financial Times), @sarahjwells

Sarah Wells is the technical director for operations and reliability at the Financial Times. Her teams build operational and developer tooling and help engineering teams at the FT to support the systems they build, including coordination,... Read More.

John Willis
Docker tutorial Tutorial

John Willis is a technical evangelist for Docker, which he joined after the company he co-founded (SocketPlane, which focused on SDN for containers) was acquired by Docker in March 2015. Previous to founding SocketPlane in... Read More.

Steve Workman

Steve Workman is the UI technology lead at Yell, the UK’s yellow pages, making sure you can find and choose a local business faster than you can flick through a book. Steve is an organiser of... Read More.

Mark Zeman
Mark Zeman (SpeedCurve), @markzeman

Mark Zeman is the founder of SpeedCurve, a frontend performance monitoring service that gives you continuous feedback on how your frontend code is affecting the performance of your website. Mark comes from a design background but... Read More.