Leon Ostrez
Co-Founder at Pythagora
Croatia
Summary
🤩
Rockstar🎓
Top SchoolLeon Ostrez is a software engineer, M.Sc. computer scientist, and entrepreneur with seven years of experience building full-stack systems and founding Pythagora. He led FaZe Clan’s engineering team during a pivotal growth phase and contributed to Ericsson’s Plex core language that still routes a significant portion of global 2G/3G traffic. Leon is a hands-on backend developer who created two popular open-source tools—an automated testing repo with 1.4k stars and GPT Pilot, which surpassed 22k stars—demonstrating both product intuition and community impact. Based in Croatia and a Y Combinator W24 alum, he combines rigorous academic training with a knack for automating developer workflows and secure session/auth integrations. Colleagues describe him as detail-focused, persistent, and unusually good at turning complex telecom and web problems into reliable, production-ready solutions.
7 years of coding experience
5 years of employment as a software developer
W24, W24 at Y CombinatorMaster of Science - MS, Information and Communication Technology, Master of Science - MS, Information and Communication Technology at FER
Github Skills (10)
nodejs10
expressjs10
mongodb10
mongodb-database10
testing10
api-design9
api-testing9
api9
apim9
jsonwebtoken8
Programming languages (3)
Github contributions (5)
Pythagora-io/pythagora
Jan 2023 - Mar 2023
Generate automated tests for your Node.js app via LLMs without developers having to write a single line of code.
Role in this project:
Backend Developer
Backend DeveloperContributions:90 commits, 40 PRs, 819 pushes in 2 months
Contributions summary:Leon primarily focused on enhancing the core functionality of the Node.js application by modifying the `Pytagora.js` and `RunPytagoraTests.js` files. Their work included updating the readme, adding new test functionalities, and implementing express middleware. The user also added a mechanism for parsing request bodies and added database setup and data capturing, along with implementing JSON web token and session authentication.
api-testingapi-testing-frameworkautomated-testingdatabase-testingdeveloper-tools
LeonOstrez/chat-app
Sep 2022 - Sep 2022
Contributions:17 commits, 26 pushes, 2 branches in 1 day
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