Jan Sudnik-hrynkiewicz
Lead Software Engineer at The Hashgraph Group
Cracow Metropolitan Area Poland
Summary
👤
Senior🎓
Top SchoolJan Sudnik-hrynkiewicz is a Lead Software Engineer with 11+ years of experience specializing in web application performance, profiling, benchmarking and scalable, lightweight technologies like Node.js and Vue.js. He has a strong track record delivering and integrating CDN and identity solutions—years at Akamai and hands-on experience with Akamai Identity Cloud—alongside roles building APIs and developer-facing tooling. His career spans enterprise performance work at ABB and Shell, developer-centric engineering at Energy Web and Hashgraph organizations, and early full-stack product development dating back to running an accommodation reservation system. Jan combines deep operational focus with customer-facing engineering, often turning performance diagnostics into playable product improvements and documentation. Based in the Cracow metropolitan area with an MSc in Physics and IT, he favors pragmatic, low-complexity architectures that scale, and brings a rare blend of performance-first engineering and support/solutions expertise.
11 years of coding experience
17 years of employment as a software developer
Master of Science (MSc) Physics Information technology, Master of Science (MSc) Physics Information technology at AGH University of Technology and Science
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (200)
webpagetest10
postgresql10
databases10
menubar10
menu10
bluetooth10
extensible10
command-line-tool10
temperature10
sql-query10
javascript10
brightness10
docker-compose10
pm210
golang10
Programming languages (9)
Github contributions (5)
energywebfoundation/did-auth-proxy
Jan 2022 - Feb 2023
Contributions:321 reviews, 243 commits, 406 PRs in 1 year
artursudnik/ts-boilerplate
May 2023 - Mar 2025
Contributions:13 PRs, 28 pushes, 17 branches in 1 year 11 months
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