Zach Sierakowski
Staff Software Engineer, Platform & Identity
United States
Summary
🤩
Rockstar🎓
Top SchoolZach Sierakowski is a Staff Software Engineer with 9 years of experience building and modernizing identity and platform systems at scale, currently focused on preparing GitHub for the AI era. He designs and implements high-throughput Go services, re-architecting authentication and identity to run at the edge, reduce latency, and support hundreds of thousands of RPS. Zach led extraction of Conditional Access into a standalone service and shipped GitHub Mobile 2FA used by millions, driving a 54% increase in 2FA adoption. He has hands-on migration experience from self-hosted infrastructure to Azure and champions CDC-based global replication and GTID read optimizations to reduce MySQL load. A pragmatic mentor and cross-team driver, Zach pairs deep systems thinking with product impact—turning spikes into production rollouts and saving organizations significant fraud and infrastructure costs. Outside GitHub he’s grown freelance engagements into sustained contracts, demonstrating strong delivery and client trust under tight deadlines.
9 years of coding experience
10 years of employment as a software developer
B.S Computer Science; Software Engineering, B.S Computer Science; Software Engineering at Towson University
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (90)
github10
persistent-data10
npm-package10
netlify-cms10
javascript10
phantomjs10
immutablejs10
dot-notation10
stateless10
typescript10
data-exchange10
persistent10
static-site10
collections10
github-issues10
Programming languages (4)
Github contributions (5)
zacharysierakowski/me
Jul 2017 - Jan 2019
My personal website
Contributions:5 PRs, 138 pushes, 40 branches in 1 year 6 months
reactnextjs
zacharysierakowski/redux-broadcast
May 2018 - Apr 2022
Contributions:2 releases, 4 pushes, 1 branch in 3 years 11 months
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