Marcin Jeleński
Software Engineer at Samozatrudnienie
Warsaw, Masovian Voivodeship, Poland
Summary
👤
Senior🎓
Top SchoolMarcin Jeleński is a seasoned software engineer and engineering manager with nine years of experience building web and mobile products and leading distributed teams from Warsaw. He has scaled delivery in startups and high-growth companies—recruiting and managing a remote SCRUM team of 11 at ShiftKey while introducing automation, inner-sourcing and Kanban to cut cycle time and defect leakage. As a founder and full-stack developer he launched multiple Lean Canvas-driven projects using cloud stacks (AWS, DigitalOcean, Supabase) and modern ML tooling (OpenAI, Llama), bridging product discovery with hands-on implementation. Now at ElevenLabs, he combines mobile and backend expertise with a leadership mindset honed through roles from technical advisor to team lead and board advisor. A Harvard Business School Online certificate in Management Essentials complements his technical MSc in IT, reflecting a rare blend of product-facing curiosity and operational rigor. Notably, Marcin’s background shows a pattern of moving between deep engineering and strategic roles, making him as comfortable shipping code as shaping product strategy.
9 years of coding experience
8 years of employment as a software developer
Master of Science, IT, Master of Science, IT at Warsaw University of TechnologyOther; Certificate in Management Essentials, Other; Certificate in Management Essentials at Harvard Business School Online
Polish, English
Github Skills (74)
mobile-development10
windows10
dart-pdf10
pdf-generation10
bloc10
concurrency10
flutter-plugin10
app-framework10
skiasharp10
pattern10
flutter-map10
skia10
dart10
cross-platform10
android10
Programming languages (6)
Github contributions (5)
blipinsk/dagger2-ktx
Jul 2018 - Feb 2024
Kotlin extension bridge library for Dagger2 (proof-of-concept)
Contributions:2 PRs, 1 comment in 5 years 8 months
daggerkotlin-multiplatformbridgekotlinproof-of-concept
zh-wang/ditredi
Nov 2021 - Mar 2022
Contributions:68 commits in 3 months
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