Sergey Kolbasov
Principal Software Engineer at Zalando
Helsinki, Mainland Finland
Summary
🤩
Rockstar🎓
Top SchoolSergey Kolbasov is a Principal Software Engineer based in Helsinki with 11 years of hands-on experience building scalable backend platforms and distributed systems. He blends a breadth-first platform perspective with deep, on-demand expertise in functional Scala and Haskell, and has driven migrations from monoliths to microservices while operationalizing Spark and Cassandra clusters. At Zalando he shapes architecture and delivery across services, and his open-source contributions to the popular Finch library include JSON4S support, streaming AsyncStream endpoints, and richer error/optional handling. Previously he led e-commerce engineering and built an Akka FSM-based data exchange module, showing a knack for pragmatic, stateful integrations with legacy APIs. Comfortable spanning DevOps, CI/CD and application code, he also introduced FP libraries and middle-layer abstractions that tether business logic to Finagle/Finch. An engineer who prefers composable, type-safe designs, Sergey quietly combines platform-level thinking with deep functional-programming craft.
11 years of coding experience
9 years of employment as a software developer
Specialist (5 years BS/MS-equivalent) Information Technology, Specialist (5 years BS/MS-equivalent) Information Technology at Saint Petersburg University of Telecommunications
English
Stackoverflow
271reputation
6kreached
1answer
10questions
Github Skills (17)
finagle10
finch10
scala10
circe9
json9
webpages9
http9
rest9
html6
playframework6
haskell6
jdbc6
c3p06
haskell-stack6
javascript6
Programming languages (7)
Github contributions (5)
finagle/finch
Mar 2015 - Sep 2021
Scala combinator library for building Finagle HTTP services
Role in this project:
Back-end Developer
Back-end DeveloperContributions:2 releases, 5 reviews, 64 commits in 6 years 6 months
Contributions summary:Sergey primarily contributed to the core functionality of the Finch library. They implemented new features, such as default values for optional readers and error handling for endpoints. The user also added support for JSON4S encoding/decoding and implemented streaming support for `AsyncStream[A]` which improved the library's usability. Finally, they refactored and added new methods to the Endpoint class.
circefinaglehttp-servicescombinatorscala
sergeykolbasov/finch
Mar 2015 - May 2019
Your REST API as a Monad
Contributions:237 pushes, 55 branches in 4 years 2 months
apinodejsrestrest-apimonad
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