Hi there!
I'm Mateusz

Main Square in Kraków
Portrait of Mateusz Warzecha

About me

I'm a software developer based in Kraków, focused on building fast, pragmatic web applications end to end — from data modeling and APIs to the pixels users actually click on. I like small teams, short feedback loops, and shipping things that are actually used.

Outside of client work I build small tools for myself and for university projects, usually as an excuse to try something new — a routing heuristic, a WebAssembly build, a spaced-repetition scheduler. A few of them are in the Projects section below.

TypeScriptReactNext.jsNode.jsPostgreSQLDockerTailwind CSSRust

Projects

A few things I've built, each with its own write-up covering the problem, the approach, and what I'd do differently.

Experience

  1. 2024 — present

    Freelance Software Developer

    Self-employed

    Building web applications for small businesses, mostly Next.js + PostgreSQL, from initial scoping through deployment and maintenance.

  2. 2023 — 2024

    Backend Intern

    Mock Fintech Sp. z o.o.

    Worked on internal reporting APIs and a data pipeline that reduced nightly batch job runtime by roughly a third.

  3. 2021 — present

    Computer Science Studies

    AGH University of Kraków

    Coursework in algorithms, databases, and distributed systems; several of the projects in this portfolio started as class assignments.

Contact

Have a project in mind or just want to say hi? Send a message below, or reach out directly.