Sebastian
El Talar, Buenos Aires, Argentina
Summary
Sebastian Koleff is a Senior Full-Stack Engineer with 5+ years of experience scaling a B2B SaaS platform, recently promoted through multiple engineering roles at COR to lead core architecture and feature delivery. He combines product-minded engineering with hands-on expertise in React, TypeScript, Node.js, Next.js, PostgreSQL and GraphQL to make data modeling and performance trade-offs that shape long-term product scalability. A top contributor to his codebase, Sebastian routinely owns end-to-end delivery from core system design to shipping complex features. He has practical backend experience back to PHP and Docker, and early full-stack work using MySQL and Sequelize that informs his pragmatic approach to integrations. Based in Vicente López, Buenos Aires, he is particularly drawn to product-led SaaS, fintech and AI-first teams where engineering judgment matters as much as speed. Beyond coding, his background in electromechanics and architecture gives him a systems-oriented perspective on design and maintainability.
5 years of coding experience
Github Skills (5)
pdf-files8
pdf8
react7
renderer7
flexbox6
Programming languages (2)
Github contributions (5)
polbac/MD-LARIOJA-2021
Oct 2021 - Dec 2021
Contributions:54 commits, 2 PRs, 4 pushes in 2 months
seba-cod/dashboard-spareparts
May 2021 - May 2021
Contributions:11 commits in 8 days
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.