Sebastian Koleff
Senior Software Engineer at COR
Vicente López, Buenos Aires, Argentina
Summary
👤
Senior🎓
Top SchoolSebastian 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
5 years of employment as a software developer
Tecnicatura, Electromecánico, Tecnicatura, Electromecánico at Ing. E. Martin HERMITTEArquitecto, Arquitectura, Arquitecto, Arquitectura at Universidad de FloresFull Stack Web Developer, Full Stack Web Developer at Digital House
Spanish, English
Github Skills (6)
pdf9
renderer8
react-pdf8
flexbox8
pdf-files8
react7
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.