Jakub Serafin
Engineering Manager at OLX
Pabianice, Łódź Voivodeship, Poland
Summary
🤩
Rockstar🎓
Top SchoolJakub Serafin is an engineering manager and former full‑stack developer with over a decade of experience building scalable .NET systems, cross‑platform mobile apps, and cloud backends. He blends hands‑on technical craftsmanship—especially around clean, testable architecture and integrations—with people leadership, having grown teams, improved engagement from 40% to 85%, and shipped features like OLX Rating System and Geo pricing for OtoDom. Comfortable across desktop, mobile, and web stacks, he has modernized webhook APIs and AWS deployments for Grist and driven integration reliability improvements of ~70% in enterprise environments. A Scrum enthusiast and coach, he focuses on Product, People, and Processes to maximize delivery and developer growth. He brings a practical bias for modular solutions, automated testing, and measurable operational improvements grounded in both startup and large‑company contexts.
10 years of coding experience
11 years of employment as a software developer
Master's degree, Computer Engineering, Master's degree, Computer Engineering at Uniwersytet Zielonogórski
English
Github Skills (10)
typescript10
typescripts10
api10
apidoc10
typescript-types10
webhooks9
redis9
database7
spreadsheet7
databases7
Programming languages (6)
Github contributions (5)
gristlabs/grist-core
Mar 2023 - Aug 2023
Grist is the evolution of spreadsheets.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:5 reviews, 2 PRs, 1 push in 4 months
Contributions summary:Jakub primarily focused on enhancing the core functionality of Grist, specifically in areas related to data handling and export. Their contributions include implementing persistent currency formatting during Excel exports, moving proxy agent functionalities into a separate file, and sanitizing errors in Redis logs to protect user data. They also reworked the API for webhooks, implementing POST and DELETE methods for creation and removal, and improving the GET endpoint response.
evolutiondatabasedata-importspreadsheetspreadsheets
JakubSerafin/netchat
Jan 2018 - Mar 2018
Contributions:17 pushes, 3 branches in 2 months
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