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Jan Kowalczyk
@jan_kowalczyk4
I turn failed deployments into clear fixes
Poland
English
About me
Hi, I'm Jan. I enjoy the part of development most people would rather skip: figuring out why an app works locally but refuses to deploy. I approach Next.js, React, and Vercel problems like a puzzle - start with the logs, isolate the real cause, fix only what is needed, and explain the solution clearly.
I focus on build failures, environment variables, routing, API issues, TypeScript errors, and production-only bugs. You can expect practical communication, focused changes, and clear handoff notes after the fix.
Skills
Jan Kowalczyk
Offline •
Average response time: 1 hour
See my services
Bug Fixes
I will fix next js react and vercel deployment errors
