Daniel Milewski · Gdańsk · Remote EU
I build backend systems, APIs and data pipelines in Python for fintech and energy companies. Code that runs in production and stays easy to maintain.
Research analytics · 2025–now
Senior Python Developer · 2024–now
Online brokerage · 2024–2025
Products I designed, built and shipped on my own, from data model to deploy.
All projects →
Personal Wealth & Portfolio Analytics Platform
No existing tool could consolidate Polish investment accounts (IKE, IKZE, OIPE, Finax) together with foreign stocks, ETFs, crypto, and precious metals into a single accurate dashboard.
Stack
SEO-first Interior Designer Website
The studio needed a premium website that converts local traffic in Tricity, supports bilingual content, and performs well in SEO, AI discovery, and trust signals.
Stack
Bilingual Interior Design Website
An interior design studio working in Warsaw and the Tricity needed a site where large, photo-led projects load fast, read well in Polish and English, and give Google a clear picture of the business.
Stack
What a team can expect from me in the first month and after.
I pick tools that fit the team's size, budget and operational maturity, not the most interesting ones.
If something will slip or hides complexity, you hear about it in planning, not at the deadline.
Clear names, small modules and tests on the paths that matter, so others can contribute on day one.
Notes from building real systems, not theory.
All posts →Useful context for people who want to quickly judge whether I'm a good fit for the work.
Primarily Python backend work, APIs, automation, and data-heavy systems. I also work on AI tooling or frontend when it genuinely helps the product.
The strongest fit is work that needs a backend designed or cleaned up, APIs shipped, processes automated, or a production system made more maintainable.
Yes. I work remote-first and operate as a registered sole proprietorship in Poland, so B2B collaboration is a natural setup.
No. I can step into a larger delivery or a narrower piece of work such as a technical audit, backend stabilization, API design, or a targeted automation project.
Latest content update: 6 October 2026
Send me the role or the problem. I reply within a few working days, in English or Polish.