Sergii Kolisnyk
Software Engineer at Optibus
Berlin, Germany
Summary
👤
Senior🎓
Top SchoolSergii Kolisnyk is a Berlin-based software engineer with over 15 years of professional experience and a strong focus on full-stack JavaScript development, leadership, and people management. He has progressed from QA and Flash/Unity game development into senior engineering and team lead roles, shaping front-end and backend systems using React, Next.js, Node.js, .NET, and PostgreSQL. At companies like Kontist, Civey, and now Optibus, he’s combined hands-on coding with engineering management, performance optimization, and teaching. His early background in QA and hardware description languages gives him a pragmatic, test-oriented perspective that informs robust system design. Comfortable across web, mobile and game domains, he brings both technical depth and a knack for mentoring teams through scaling challenges.
11 years of coding experience
17 years of employment as a software developer
Master of Intellectual Property Intellectual Property Law, Master of Intellectual Property Intellectual Property Law at National Technical University «Kharkov Polytechnical Institute»
English, Russian, Ukrainian, German
Stackoverflow
21reputation
378reached
0answers
3questions
Github Skills (16)
banking9
api8
sdk8
javascript7
graphql6
scrape6
rvest6
databinding6
rselenium6
typescript6
scroll6
webscraping6
parsing6
dataframe6
r6
Programming languages (2)
Github contributions (5)
kolyose/kolyose.github.io
Mar 2019 - Oct 2021
Contributions:2 pushes, 1 branch in 2 years 6 months
kolyose/crazyRacing
Aug 2016 - Dec 2017
Contributions:49 pushes, 5 branches in 1 year 4 months
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