Huseyin Keles
Senior Software Engineer at Catawiki
Mountain View, California, United States
Summary
👤
Senior🎓
Top SchoolHuseyin Keles is a Senior Software Engineer with 15 years of experience building and scaling backend systems, currently based in Mountain View and working at Catawiki. He has a strong track record in e-commerce and marketplace domains—designing payment systems, internationalization, and high-throughput pricing and order management services that process millions of transactions. Huseyin brings pragmatic architecture skills, having introduced Domain-Driven Design, CQRS, and Hexagonal Architecture across projects and significantly boosted test coverage and developer practices. He’s comfortable bootstrapping systems with modern stacks like TypeScript, NestJS, and Prisma while also having deep roots in Symfony/PHP for large-scale APIs. Beyond coding, he’s led teams, improved hiring and onboarding, and created developer tooling to speed delivery—an engineer who combines hands-on implementation with process and culture improvements. An early contributor to platform tooling and university-scale CMSs, he blends product-minded engineering with a history of solving integration-heavy challenges.
15 years of coding experience
12 years of employment as a software developer
Bachelor of Science (B.S.), Computer Engineering, Bachelor of Science (B.S.), Computer Engineering at Sakarya University
Turkish, English
Stackoverflow
4,579reputation
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Github Skills (98)
custom-component10
python10
automation10
reload10
home-assistant10
mqtt10
home-automation10
iot10
asyncio10
privacy10
raspberry-pi10
xiaomi9
shell9
bash9
internet-of-things9
Programming languages (9)
Github contributions (5)
WhoSayIn/nvim-config
Apr 2023 - Mar 2025
My Neovim config
Contributions:2 PRs, 100 pushes, 4 branches in 1 year 11 months
WhoSayIn/java-tetris
Apr 2011 - Mar 2012
Contributions:3 commits, 1 push in 11 months
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