Władysław Szumejko — Engineer
Ideploybuildscalablesoftware solutionsthat work.
I am a software engineer focused on building robust and secure applications. I've been coding since age 9. Based in Warsaw.
- student
Exempted from all programming subjects with top marks. Runs lectures at his uni's science club.
- security
Years of CTFs, HackTheBox, and reverse-engineering workshops. Co-owns a security community — tracked the Axios vulnerability before it hit news.
- productivity
Treated personal workflow like a system to optimize. Hundreds of hours of research, own data, own metrics. ~89% productivity is the baseline.
- product
Doesn't ship features. Ships outcomes. Every decision starts with why it matters to the user.
I have selected three projects that showcase my experience across QA, Full-stack development, and DevOps engineering
Built with TanStack Start, Router & Query
This site itself is a production example of the full TanStack ecosystem — type-safe routing, server-side rendering via TanStack Start, and fine-grained async state via TanStack Query. Zero framework lock-in.
Other Work
Data Analytics SaaS
ActiveComplex data analytics platform powered by ML.
Production Resource Management
2024Internal ERP for a clothing brand distribution network.
AI-Quiz Generator MVP
2024Fine-tuned LLM system generating dynamic educational content.
E-commerce Infrastructure
2025Custom headless e-commerce backend for a large brand group.
AI MediaParser
2022–2023Automated news parser, copywriter, and social media publisher.
DRM-encrypted Streaming
2023Minimal, secure song streaming preview web app.