Jun 2021 – Jan 2023 · 1 yr 7 mos · San Francisco Bay Area

• I lead Engineering, Product, and Design at Lightstep which was acquired by ServiceNow.

Jun 2020 – Jun 2021 · 1 yr · San Francisco Bay Area

• I lead Engineering, Product, and Design at Lightstep.

Jun 2019 – Jun 2020 · 1 yr · San Francisco Bay Area

Sep 2018 – Jun 2019 · 9 mos · San Francisco Bay Area

Jan 2017 – Feb 2018 · 1 yr 1 mo · Palo Alto, CA

• Confluent Cloud

Mar 2014 – Jun 2016 · 2 yrs 3 mos

• Led the MoPub engineering team.

Sep 2012 – Mar 2014 · 1 yr 6 mos

• Created and led the Runtime Systems org working on Twitter's cloud, data, analytics, and runtime infrastructure.

Jul 2011 – Aug 2012 · 1 yr 1 mo

• The Runtime Systems org is now over 40+ people and consists of 8 teams. They continue to focus on building a scalable foundation for the Twitter software stack. #AmazingEngineers

Dec 2010 – Jul 2011 · 7 mos

• Managing the Runtime Systems team which is focused on helping scale out the Twitter infrastructure. Some highlights are using Redis to be our replicated timeline cache, reworking memcache internals to more effectively deal with slab calcification, built a real time stats collection and monitoring stack, Mesos, Finagle, and more. This team is a fantastic group of engineers.

May 2010 – Dec 2010 · 7 mos

• Working with a great team of folks to kill "The Twitter Whale". This included hacking on memcache internals, the ruby interpreter, rails code, and more. #lovenest

Apr 2006 – Apr 2010 · 4 yrs

• Member of the Virtual Machine Monitor (VMM) engineering team. The VMM is the basis for all of VMware's virtualization products. I worked on many projects including general CPU virtualization, deterministic replay, and a scalable instrumentation / code injection system.

Jul 2005 – Apr 2006 · 9 mos

• Worked with AMD and Intel to understand upcoming technology and how it will effect the virtualization market.

Sep 2002 – Jun 2005 · 2 yrs 9 mos

• Worked with Wall Street to adopt x86 solaris and the new 64-bit compiler toolchains.