Giannis Katsanos
Staff Software Engineer at Clerk.com
Greece
Summary
🤩
Rockstar🎓
Top SchoolGiannis Katsanos is a Staff Software Engineer with 11 years of experience building scalable web applications, distributed systems, and payment infrastructures, currently at Clerk.com. He combines hands-on full-stack development with architectural leadership, having led backend teams and early-stage platform builds using serverless Golang, Ruby on Rails, and cloud data pipelines. Giannis has driven revenue-impacting payment integrations at Scribd and designed ETL and streaming solutions at Butter Payments, while also contributing notable fixes and organization-management features to the widely used Clerk JavaScript repository. Comfortable in fast-paced, cross-functional roles, he’s known for clear communication, decisiveness under pressure, and a bias for improvement. Based in Greece, he pairs pragmatic product focus with deep technical breadth across frontend, backend, and infrastructure.
11 years of coding experience
12 years of employment as a software developer
BSc Computer Engineering and Informatics, BSc Computer Engineering and Informatics at University of Patras
Greek, English, Japanese
Github Skills (17)
javascript10
back-end-development10
apidoc10
authentication10
user-authentication10
api10
nodejs10
backend10
react10
auth10
typescripts8
nextjs8
typescript-types8
typescript8
remix7
Programming languages (6)
Github contributions (5)
clerk/javascript
Feb 2022 - Nov 2022
Official JavaScript repository for Clerk authentication
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:137 reviews, 88 commits, 83 PRs in 8 months
Contributions summary:Giannis contributed to both the frontend and backend aspects of the Clerk authentication repository. They fixed issues related to error messages and the phone input component within the frontend's JavaScript code. They also implemented and expanded the backend's organization API, adding features to create, update, and manage organization data and permissions, including features for organization invitations and metadata. The user worked across multiple packages within the repository, demonstrating a broad understanding of the project's architecture.
gatsbyreacthasurajavascriptauthentication
gkats/dotfiles
Feb 2016 - Feb 2023
Contributions:26 pushes, 3 branches in 7 years 1 month
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