Gregory Witek
Software Engineering Manager at Meta
London, England, United Kingdom
Summary
🤩
Rockstar🎓
Top SchoolGregory Witek is a product-obsessed software engineering manager with 13–15 years of experience leading teams across infrastructure, travel, and fintech, currently based in London and open to roles in the UK, US, or Amsterdam. He combines hands-on backend experience (notably contributions to the Sorcery Rails authentication library) with senior leadership at Booking.com and Meta, where he has driven incident management, internal developer platforms, DORA and delivery metrics, and large-scale configuration and secrets programs. Gregory has built and scaled remote teams, negotiated multimillion-dollar vendor deals, and designed data models for ecosystems spanning thousands of microservices. Outside of work he mentors engineers and managers through a popular YouTube channel, blog, and 1:1 coaching, reflecting a commitment to elevating developer and leadership skills across the industry.
13 years of coding experience
16 years of employment as a software developer
Master of Science (M.Sc.) Software Engineering, Master of Science (M.Sc.) Software Engineering at Poznan University of TechnologyUniversitat Politècnica de València
English, Spanish, Polish, Dutch, German, French
Stackoverflow
1,226reputation
70kreached
37answers
2questions
Github Skills (18)
ruby-rails10
authentication10
user-authentication10
rails10
ruby10
testing9
mongodb8
data-mapper8
mongoid8
ruby-on-rails6
jquery-file-upload6
vue6
rack-cors6
jquery6
regex6
Programming languages (8)
Github contributions (5)
NoamB/sorcery
Feb 2014 - Oct 2016
Magical authentication for Rails 3 & 4
Role in this project:
Back-end Developer
Back-end DeveloperContributions:183 commits, 38 PRs, 51 pushes in 2 years 8 months
Contributions summary:Gregory primarily contributed to the Sorcery authentication library for Rails. Their work involved fixing redirection specifications, improving the handling of password confirmations, and correcting methods for retrieving users from sessions. The user also addressed issues related to Mongoid and DataMapper save! behaviors, and enhanced the functionality of the library's core controller components. In addition, they updated integration tests.
railsauthenticationrubyspree
arnvald/simple_operation
Apr 2015 - Aug 2018
Contributions:23 commits, 1 PR, 12 pushes in 3 years 4 months
facilitatesjavaservice-objectsrest
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