Grzegorz Zwoliński
Senior Frontend Developer at Billennium
Gdynia, Pomeranian Voivodeship, Poland
Summary
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Senior🎓
Top SchoolGrzegorz Zwoliński is a Senior Frontend Developer with nine years of professional experience, currently based in Gdynia and working at Billennium after a senior role at Avenga focused on LIMS for a Big Pharma leader. He blends strong front-end craftsmanship—component quality, performance optimization and modern frameworks—with full-stack experience and hands-on D3.js data visualizations. Grzegorz has led code reviews, technical hiring and mentoring, and routinely drives scalability, security and usability improvements across microservice-integrated applications. Comfortable working closely with UX designers and product owners, he applies agile practices to deliver polished, user-focused interfaces that meet rigorous industry needs. An ongoing learner, he maintains a personal site and GitHub presence that reflect his interest in both front- and back-end problems.
9 years of coding experience
13 years of employment as a software developer
ICT, ICT at West Pomeranian University of Technology in Szczecin
Polish, English
Github Skills (16)
javascript8
nodejs8
typescript8
angular8
react8
web-performance4
web-framework4
web-developer3
trading2
trading-bot2
cryptocurrency2
binance2
ccxt2
bots2
algorithmic-trading1
Programming languages (1)
Github contributions (5)
g-zwolinski/triangularArbitrage
Oct 2016 - Jan 2018
Contributions:6 commits, 5 pushes, 1 branch in 1 year 3 months
g-zwolinski/g-zwolinski.github.io
Sep 2017 - Jul 2019
Contributions:5 pushes, 1 branch in 1 year 10 months
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