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Patryk User

@patrykuser

Message

I build reliable serverless applications and zero-flake QA automation with AI-powered testing and troubleshooting.

Poland

Message

What I'm looking for

I'm looking for a role where I can troubleshoot complex application issues, improve system reliability, build effective QA automation, and work with APIs, databases, CI/CD, and AI-enabled solutions.

At Presora, I build and test a distributed serverless architecture as Founder and Full-Stack / AI Quality Engineer.

I designed a greenfield QA strategy covering E2E, API, and contract testing across 23 serverless functions. I reduced CI/CD regression testing to two minutes with GitHub Actions and two parallel shards.

I eliminated pipeline execution errors from 35% to zero across 112 consecutive successful runs by building a custom server wrapper. I also evaluated Playwright and Cypress for test sharding and asynchronous element-state handling.

I investigate application errors across APIs, databases, serverless functions, and third-party integrations, then implement reliable fixes. I’ve also built a RAG pipeline with Voyage AI, pgvector, and Claude, including conversational agents with tool-calling capabilities.

Experience

Work history, roles, and key accomplishments

Current

Founder & Full-Stack / AI Quality Engineer

Current

Presora

Mar 2026 - Present (6 months)

Designed and executed a comprehensive testing strategy for a distributed architecture of 23 serverless functions, reducing regression testing time by 65% and eliminating pipeline flakiness. Implemented a production-grade RAG pipeline and investigated application errors across serverless functions, APIs, and databases.