Mateusz Sieńczuk
Chief Technology Officer at BodyVibes.pl
Cracow Metropolitan Area Poland
Summary
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SeniorMateusz Sieńczuk is a results-driven CTO with nine years of experience building scalable web applications across front-end and back-end stacks. Based in the Kraków metro area, he combines expertise in JavaScript/TypeScript and Angular with C#/.NET to deliver user-centric experiences on multi-continental projects. As CTO of BodyVibes.pl since 2023, he shapes technology strategy and leads implementation to turn complex requirements into reliable software. Previously at PeakMetrics he owned a client-facing React application, helped replace legacy systems with modern architectures, and promoted agile practices that boosted team efficiency while saving substantial costs. His career also includes founding roles and freelance projects, reflecting an entrepreneurial drive and hands-on leadership across startups and scale-ups.
9 years of coding experience
5 years of employment as a software developer
english c1, Polish
Github Skills (24)
slack-bot8
graphql6
graphql-client6
apollo-client6
typescript6
caching6
slack-api6
filtering5
apollographql5
rocket5
java5
bolt5
django5
kotlin5
websocket4
Programming languages (3)
Github contributions (5)
ladrone-vincet/phx-foundation
Mar 2018 - Feb 2019
Contributions:11 pushes, 1 branch in 11 months
ladrone-vincet/Smog.rb
Mar 2017 - Sep 2017
Contributions:3 pushes, 1 branch in 6 months
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