Kalys Osmonov
Senior Full Stack Engineer at Railsware
Krakow, Lesser Poland Voivodeship
Summary
👤
Senior🎓
Top SchoolKalys Osmonov is a Senior Full Stack Engineer with nine years of experience building product and platform capabilities, mainly using Ruby on Rails and React, and additional proficiency across Node, TypeScript, Go, PHP, Python, and Elixir. He has driven architecture, reliability, and organizational change at scale—helping migrate a monolith to service-oriented architecture and supporting Calendly through a 10x engineering growth and massive repo expansion. As a former CTO of a 50-engineer consultancy, he built onboarding and development processes that accelerated junior and mid-level engineers while tackling high-availability and performance challenges in real-world systems. He maintains notable open-source work, including an Elixir AWS SES adapter with over 1M downloads, and enjoys owning systems end-to-end to boost maintainability for both users and engineers. Based in Krakow, he blends hands-on feature delivery with platform thinking and a proven ability to mentor teams across continents.
9 years of coding experience
16 years of employment as a software developer
Engineer's degree, Computer Science, Engineer's degree, Computer Science at Kyrgyz State Technical University
English, Russian, Kyrgyz, Polish
Github Skills (41)
monaco-editor9
browser9
vscode9
code-editor8
typescript8
javascript7
editor7
react5
bootstrap5
admin4
redux4
theme-ui4
reactjs-components4
cloudinary4
tabler4
Programming languages (4)
Github contributions (5)
Kalyskin/react-game
Dec 2016 - Nov 2018
Contributions:18 pushes, 2 branches in 1 year 11 months
Kalyskin/JSM
Mar 2017 - Apr 2017
Contributions:19 pushes, 2 branches in 27 days
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