Marcin Wojnarowski
Power BI Developer at BlueSoft
Lausanne, Vaud, Poland
Summary
🤩
Rockstar🎓
Top SchoolMarcin Wojnarowski is a Power BI developer with eight years of analytical and data-engineering experience, currently based in Lausanne and working with BlueSoft and IQAIT. He blends a strong background in finance and analytics—from roles at Credit Suisse and BNY Mellon to market research at EY—with a formal education in Informatics and Econometrics. Marcin delivers actionable BI solutions that streamline reporting and surface root causes for data quality and cost analysis, while also optimizing report production and distribution. He contributes to open-source back-end projects, notably improving express-rate-limit middleware with enhanced error handling and customizability, reflecting his interest in mixing math with computer science. Pragmatic and detail-oriented, he thrives at the intersection of quantitative analysis and production-ready tooling.
8 years of coding experience
2 years of employment as a software developer
Master's degree, Informatics and Econometrics, Master's degree, Informatics and Econometrics at Akademia Ekonomiczna im. Oskara Langego we WrocławiuLicentiate degree, Bezpieczeństwo narodowe, Licentiate degree, Bezpieczeństwo narodowe at Uniwersytet Wrocławski
Polish, English
Stackoverflow
182reputation
19kreached
6answers
5questions
Github Skills (21)
javascript10
limiting10
rate-limiting10
middleware10
expressjs10
testing10
nodejs10
security9
rest-api9
api8
apim8
api-design8
rgb6
javascript-objects6
dom-events6
Programming languages (28)
Github contributions (5)
express-rate-limit/express-rate-limit
May 2020 - Jun 2020
Basic rate-limiting middleware for the Express web server
Role in this project:
Back-end Developer
Back-end DeveloperContributions:10 commits, 1 PR, 9 comments in 1 month
Contributions summary:Marcin's commits primarily focused on enhancing the express-rate-limit middleware. They refactored and updated test files, added support for new features like custom error messages and custom skip functions. The user also contributed to improvements in headers and error handling within the middleware and implemented changes for better rate limit header support.
expressjsexpressrate-limitinglimitingexpress-middleware
shilangyu/frontend-stack
Jan 2020 - Jan 2021
My current template for a frontend stack
Contributions:214 PRs, 218 pushes, 140 branches in 11 months
reacttemplatefrontendtypescript
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