Gillis Haasnoot
Software Specialist at Sportalize BV
South Holland, Netherlands
Summary
👤
Senior🎓
Top SchoolGillis Haasnoot is a seasoned software specialist and founder with 14 years of experience building products that span mobile, web, and backend systems, currently working at Newstory.nl while continuing to scale Sportalize. He combines hands-on engineering (iOS, Android, web frontends, PHP/NodeJS backends, MySQL/SQLite, C) with operational expertise running self-managed Linux servers, performance and security tuning, and AI-powered features including locally hosted LLM translation services. As Co‑Founder/CTO of Payaut he turned a prototype into an investor-backed product and built a development team and payments automation for marketplaces. He has led teams and shipped infrastructure-heavy projects like a custom advertising solution at Spil Games and a widely used live football app with millions of users. Comfortable moving between code, devops, and commercial partnerships, he brings entrepreneurial grit and a pragmatic approach to delivering reliable, scalable products from concept to production.
14 years of coding experience
10 years of employment as a software developer
Bachelor, Computer Science, Bachelor, Computer Science at HU University of Applied Sciences Utrecht (Hogeschool Utrecht)2de montessorischool huizen
Russian, English, Dutch
Github Skills (73)
image-loading10
rc9
caching9
smooth-scrolling9
android9
tinyjpg8
python8
image-viewer8
tinypng8
autopilot7
aircraft7
raspberry-pi7
firebase-admin6
firebase6
html6
Programming languages (9)
Github contributions (5)
BananaJs/Banana
Feb 2012 - Dec 2022
Contributions:17 commits, 8 pushes in 11 years
holoduke/football_simulator
Feb 2019 - Mar 2026
Contributions:14 pushes, 1 branch in 7 years 1 month
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