Krystian Sztadhaus
Senior Front-end Developer at Kineti BV
Gdańsk, Pomeranian Voivodeship, Poland
Summary
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Rockstar🎓
Top SchoolKrystian Sztadhaus is a senior front-end developer based in Gdańsk with over a decade of hands-on experience building high-performance React and TypeScript applications and 8+ years in professional roles across full-stack projects. He has a strong track record of performance optimization—reducing load times by up to 80%—and has repeatedly improved time-to-first-meaningful-render through image optimization and API simplification. Krystian has designed scalable K-12 educational platforms and military- and IoT-facing systems, built component libraries and CI/CD pipelines, and routinely reviews peers’ code to raise quality and reliability. Comfortable across Node.js, Mongo/Postgres, GraphQL and TRPC, he bridges front-end polish with backend efficiency and pragmatic release processes. Known for creating engaging animations for younger users and for optimizing Kafka events and database queries, he blends UX sensitivity with backend performance tuning. Currently contributing as Senior Front-end Developer at Kineti BV, he brings both production troubleshooting experience and a disciplined approach to shipping maintainable systems.
7 years of coding experience
10 years of employment as a software developer
Computer science, Computer science at Uniwersytet Warmińsko-Mazurski w Olsztynie
Stackoverflow
484reputation
29kreached
37answers
1question
Github Skills (159)
messenger10
chat10
apollo-client10
declarative10
uikit10
javascript10
hook10
apollographql10
nest10
server-side10
wai-aria10
typescript10
rocket10
fetch10
ui-framework10
Programming languages (7)
Github contributions (5)
sztadii/react-memo-debounce
May 2020 - Jun 2024
A function to prevent unnecessary render calls ( almost like React.memo )
Contributions:41 PRs, 64 pushes, 40 branches in 4 years 2 months
renderreactcallspreventreact-like
sztadii/zombie-showcase-server
Dec 2020 - Dec 2021
REST API I made during the interview. I kept it, so future employers can see it.
Contributions:47 PRs, 75 pushes, 53 branches in 1 year
apiemployersexpressnodejsrest
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