Mikołaj Grząślewicz
Senior Java Software Engineer at Atlassian
Greater Poland Voivodeship
Summary
👤
Senior🎓
Top SchoolMikołaj Grząślewicz is a Senior Java Software Engineer with 11 years of experience building maintainable, cost-effective systems in banking and enterprise settings, currently at Atlassian. He blends software architecture and DevOps expertise with strong Kanban delivery skills to produce resilient Spring Boot applications and scalable infrastructures. As an entrepreneur he runs multiple ventures, including autocoin-trader, where he architects automated multi-exchange trading and arbitrage solutions, demonstrating practical expertise in low-latency, cross-platform systems. His open-source work ranges from front-end UX fixes for the popular Caprine Messenger to maintaining an OpenCore EFI for AMD Ryzen Hackintosh systems, signaling a knack for deep system-level problem solving beyond typical backend roles. A Poznan University of Technology master's graduate, he pairs academic rigour with hands-on tinkering and a long-term cost-of-ownership mindset that favors sustainable architectures. Fluent in English and experienced across business and technical domains, he thrives at the intersection of product thinking and engineering craft.
11 years of coding experience
7 years of employment as a software developer
Master's degree, Master's degree at Poznan University of Technology
Stackoverflow
71reputation
9kreached
3answers
0questions
Github Skills (26)
efi10
javascript10
electron10
emoji10
css10
opencore10
ui-design10
darksky10
amd10
darkmode10
hackintosh10
macos10
facebook-messenger9
bootloader9
uefi9
Programming languages (13)
Github contributions (5)
mikigal/ryzen-hackintosh
Mar 2019 - Jan 2023
OpenCore EFI for AMD Ryzen Hackintosh
Role in this project:
System Architect / Software Architect
System Architect / Software ArchitectContributions:353 commits, 7 PRs, 382 pushes in 3 years 10 months
Contributions summary:Mikołaj primarily focused on maintaining and updating the bootloader and related components for AMD Ryzen Hackintosh systems. Their contributions included updating Clover and OpenCore, the primary bootloaders, along with associated drivers (UEFI and kexts) and resources for the OpenCore GUI. They also updated the system to macOS Catalina, and later, Big Sur and Monterey, incorporating necessary fixes and adjustments. Furthermore, they managed various patches, including those for Adobe software and sleep/wake functionality.
amd-ryzenamdryzen-hackintoshcloverefi
sindresorhus/caprine
Jan 2019 - Jul 2019
Elegant Facebook Messenger desktop app
Role in this project:Front-end Developer
Front-end DeveloperContributions:7 commits, 8 PRs, 21 comments in 6 months
Contributions summary:Mikołaj primarily contributed to the user interface and appearance of the Caprine application. They implemented the functionality for emoji style selection and applied necessary code changes to utilize the options within the application. In addition, the user fixed issues within the display of the user interface, including the messaging text bar and the plus and thumbs-up icons within the dark mode.
electronmacos-appchatfacebooknodejs
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