Marcin Mazurek
Senior Frontend Engineer II (Technical Lead) at Apollo.io
Krakow, Lesser Poland Voivodeship
Summary
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RockstarMarcin Mazurek is a Senior Frontend Engineer II and technical lead with 11 years of experience building customer-facing web products and developer tools, currently leading AI-powered research tools at Apollo.io. He combines hands-on TypeScript/React expertise with pragmatic delivery practices—incremental rollout, A/B testing and CI/CD—to move features from idea to measurable impact. Marcin has led cross-functional teams at companies from IOHK (Cardano wallets) to William Hill, architecting microfrontends, testing frameworks, and analytics integrations that improved reliability and release velocity. Comfortable shipping production-ready code and mentoring teams, he balances clean code principles with the belief that “done is better than perfect.” Based in Kraków, he has a track record of bringing complex integrations—hardware wallets, Electron apps, and LLM-driven pre-meeting insights—into production.
11 years of coding experience
9 years of employment as a software developer
English, Polish
Github Skills (128)
testing10
cryptocurrency10
ada10
cardano10
declarative10
wallet10
javascript10
in-progress10
ava10
html10
plutus10
angular10
json10
traversal10
typescript10
Programming languages (6)
Github contributions (5)
marcin-mazurek/settings
Dec 2016 - Aug 2022
Contributions:2 PRs, 75 pushes, 2 branches in 5 years 8 months
dotfileslinuxsettingsapplication-settings
marcin-mazurek/react-render-debugger
Aug 2015 - Mar 2017
Contributions:5 releases, 23 commits, 5 PRs in 1 year 7 months
renderes7-decoratorreactes7visualizer
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