Mar 2022 – Apr 2026
Calan
4 yrs 2 mos · Warsaw, Poland
Full-Stack Data Engineer
Full-time · Jun 2024 – Apr 2026 · On-site
- KPI systems: designed and implemented tracking systems to assess and improve internal production processes.
- Process automation: led the automation of reporting, management, and marketing workflows using Python, SQL, and ETL pipelines in MS Fabric.
- Legacy optimization: refactored SQL procedures, views, and reports, reducing technical debt and improving performance.
- Cross-functional collaboration: worked in teams of 4–6, contributing to project leadership, task distribution, and code reviews.
- Data transformation & visualization: built ETL processes for complex datasets and visualized insights in Power BI.
Data Analyst
Part-time · Mar 2022 – Jun 2024
- Quantitative analysis: deep-dive evaluations of business performance metrics to support data-driven decision-making.
- Automated controlling: streamlined internal financial tracking and controlling, improving accuracy and efficiency.
- Statistical modeling: developed models for evaluating business performance and risk factors.
- Interactive dashboards: built and maintained Power BI dashboards for stakeholders, enabling real-time monitoring of key metrics.
2025 – 2028
Kozminski University
Bachelor's, Accounting and Finance
AACSB, AMBA, EQUIS accredited
2024 – 2028
Polish-Japanese Academy of Information Technology
Bachelor's, Computer Science
2026
Near-duplicate detection over 1.1M Common Crawl documents flagged 16,570 for removal. The implementation was measurable; the meaning of “duplicate” was not.
- One written policy, one human and two model label sets: 97.9% / 18.0% / 30.6% called duplicate.
- Cohen's κ between human and gpt-4o-mini: −0.007, below chance.
- No precision reported — the release publishes deletion flags instead of applying them.
- Runtime cut 70:45 → 12:53, every change output-equivalence checked. GPU MinHash won a benchmark, not the pipeline.
2026
Credit and Market Risk Modeling with NLP [WIP]
Modeling credit and market risk by combining news flow and ESG signals with NLP. In progress — release soon.
2024
A Safari web extension that removes YouTube Shorts from your browsing experience. JavaScript.
