Grzegorz Daniluk
Principal Software Engineer at Refwell
Warsaw, Masovian Voivodeship, Poland
Summary
👤
Senior🎓
Top SchoolGrzegorz Daniluk is a Principal Software Engineer based in Warsaw with roughly two decades of hands-on experience designing and shipping scalable systems across fintech, payments, and embedded domains. He blends deep backend expertise in AWS, Ruby on Rails, Java and Rust with product-minded leadership, having driven high-impact projects at Flatpay/PayPal/Braintree and built a Pharma CRM SaaS from the ground up. His background ranges from silicon-valley embedded systems and telecom billing to enterprise insurance databases, giving him a rare perspective on both low-level constraints and cloud-native scalability. Known for taking teams from prototype to production, he excels at architecting resilient payment flows and integrating complex legacy systems. Outside of employer roles he runs Refwell, demonstrating continuous delivery and ownership across long-lived products.
15 years of coding experience
15 years of employment as a software developer
M.S. Computer Science, M.S. Computer Science at University of Warsaw
Github Skills (91)
peer-to-peer10
mobile-web10
framework710
javascript10
stencil10
ionic10
angular10
progressive-web-apps10
typescript10
progressive10
vue10
android10
synchronization10
filesystem10
fragment-lifecycle10
Programming languages (10)
Github contributions (5)
gregd/qmk_firmware
Mar 2021 - Mar 2025
Open-source keyboard firmware for Atmel AVR and Arm USB families
Contributions:80 pushes in 4 years
rp2040nrf52840firmwareavratmel
gregd/dotfiles
Apr 2021 - Nov 2022
Contributions:51 commits, 57 pushes, 1 branch in 1 year 6 months
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