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John Wittrock


Staff Software Engineer, Engineering Manager working on Fuchsia at Google.

New York, New York

Section title

John Wittrock's Email Addresses & Phone Numbers

John Wittrock's Work Experience

GWU Computer Science Dept.


January 2010 to May 2013


Staff Software Engineer

Greater New York City Area

Sidewalk Labs

Senior Software Engineer and Engineering Manager

November 2017 to November 2019

Greater New York City Area

John Wittrock's Education

The George Washington University

Bachelor of Science (B.S.), Computer Science

2009 to 2013

Stuyvesant High School

About John Wittrock's Current Company

GWU Computer Science Dept.

About John Wittrock

📖 Summary

Tutor @ GWU Computer Science Dept. From January 2010 to May 2013 (3 years 5 months) Staff Software Engineer @ Google I'm working on Fuchsia, an open-source operating system. Greater New York City AreaSenior Software Engineer and Engineering Manager @ Sidewalk Labs Identity, privacy, and security for a city built from the Internet up. I led a small team working on privacy-preserving digital infrastructure for cities, using cryptography and great user experience to improve service delivery. From November 2017 to November 2019 (2 years 1 month) Greater New York City AreaSoftware Development Intern @ Linked Senior Developed software to assist seniors with proprietary music and browsing system. From January 2010 to May 2010 (5 months) Software Engineer @ Flow, Inc. - A Sidewalk Labs Initiative - Infrastructure Tech Lead. Responsible for designing and implementing data pipelines and production infrastructure for an urban transportation platform- Worked with TensorFlow and OpenCV on traffic sensing in urban contexts From January 2017 to November 2017 (11 months) Software Engineer @ Sidewalk Labs - Early member of Sidewalk Labs engineering team- Designed and implemented data pipelines for ingestion of public data- Explored computer vision in urban contexts with a focus on traffic analysis- Brought up initial version of production infrastructure based on Docker, Kubernetes, and Google Cloud Platform From May 2016 to January 2017 (9 months) Senior Software Engineer, Real Time Platform @ AppNexus - Work on distributed systems in C with a focus on performance and reliability. - Implemented a pooling memory allocator with a concept of transactionality (see attached link)- Rearchitected evented TCP/HTTP networking client across the AppNexus adserving ecosystem to improve performance and reduce resource use while prioritizing quality of service and load balance. - Member of the AppNexus Open Source Committee, shepherding internal projects towards completion and availability to the public. From March 2015 to May 2016 (1 year 3 months) New YorkSoftware Engineer, Adserver @ AppNexus • Implement high-demand business features and improvements to core architecture of a firmrealtime ad-serving system, contributing significant performance improvements with an em-phasis on scale and reliability while serving 3 million requests per second.• Studied and understood performance and tradeoffs of distributed systems in order to correctlyattribute cost of goods sold to clients on a sub-transaction level.• Sole developer on a horizontally scalable write cache and userdata storage layer, tasked withperformance and availability improvements on a component processing over 1 million requests/second at peak. From 2013 to March 2015 (2 years) AdServer Intern @ AppNexus, Inc Designed and implemented compression support for a high-performance adserver, cutting dataarchival bandwidth by over 50%.• Contributed architecture optimizations to a fork of the libevent library, enabling performancegains for programs with high usage of the provided evhttp system. From May 2012 to August 2012 (4 months) Undergraduate Researcher @ George Washington University Voting Systems Research Group GWU Voting Systems Research Grp. 2010-2012, incl. Summer• Member of a two-person team extending the Scantegrity voting system to support open-sourceaccessible interfaces, and researched new strategies for electronic, verifiable voting systems.• Successfully deployed project in binding political election on 8 Nov, 2011.• See for more information. From October 2010 to May 2012 (1 year 8 months) TEALS New York @ Volunteer Teacher - Taught introductory computer science to a class of high schoolers in a school which did not previously have a computer science program as part of a three person teaching team. From September 2014 to June 2015 (10 months) New York City

John Wittrock’s Personal Email Address, Business Email, and Phone Number

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Frequently Asked Questions about John Wittrock

What company does John Wittrock work for?

John Wittrock works for GWU Computer Science Dept.

What is John Wittrock's role at GWU Computer Science Dept.?

John Wittrock is Tutor

What is John Wittrock's personal email address?

John Wittrock's personal email addresses are j****[email protected], and w****[email protected]

What is John Wittrock's business email address?

John Wittrock's business email addresses are not available

What is John Wittrock's Phone Number?

John Wittrock's phone (212) ***-*467

What industry does John Wittrock work in?

John Wittrock works in the Computer Software industry.

Who are John Wittrock's colleagues?

John Wittrock's colleagues are Alexei Pozdnoukhov, Charlotte Matthews, Amanda Meurer, Ananta Pandey, B.H. Johnson, Jan Fiegel, Josh Chappell, Jeff Tarr, Daniel May, and Eric Soto

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In a nutshell

John Wittrock's Personality Type

Extraversion (E), Intuition (N), Feeling (F), Judging (J)

Average Tenure

1 year(s), 4 month(s)

John Wittrock's Willingness to Change Jobs



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