Daniel Ostapenko
Frontend Architect at Toptal
Barcelona, Catalonia, Spain
Summary
👤
Senior🎓
Top SchoolDaniel Ostapenko is a Frontend Architect with 11 years of experience designing and delivering high-performance web applications from Barcelona. He has progressed through senior and principal engineering roles into architecture leadership at Toptal, after driving growth and core product work at Typeform where his frontend-first full-stack approach helped unlock significant revenue gains. Daniel is fluent in modern JavaScript ecosystems (React, Redux, webpack, styled-components) and experienced with high-load, service-oriented architectures and backend stacks including PHP, Go and AWS. He combines hands-on optimization skills from payments and monitoring systems with team leadership and product-focused engineering, often bridging legacy codebases and modern frameworks. A mathematician by training (Master’s in Applied Math and CS), he brings analytical rigor to scalable UX and frontend architecture decisions. Despite his architectural focus, he remains an active builder who enjoys diving into the code to solve performance and integration challenges.
11 years of coding experience
13 years of employment as a software developer
Master's degree, Applied Math (and Computer Science), 4.5, Master's degree, Applied Math (and Computer Science), 4.5 at Харьковский национальный университет имени В. Н. Каразина
English, Ukrainian, Spanish
Github Skills (200)
ui-components10
testing10
e2e10
in-app-purchase10
isolation10
receipt-validation10
react-testing-library10
html10
obsolete10
nested-objects10
react-native-svg10
svelte10
svelte-testing-library10
intellij10
web-components10
Programming languages (7)
Github contributions (5)
denieler/aloha-streams
Mar 2018 - May 2018
Contributions:122 PRs, 147 pushes, 117 branches in 1 month
challengingstreamingstreamers
denieler/save-workspace-atom-plugin
Aug 2016 - Mar 2018
If you work with few projects same time this plugin give you the opportunity to change your workspace faster. Save your workspace, all your opened tabs, cursor position, etc. for each task you are working with.
Contributions:6 releases, 66 commits, 17 PRs in 1 year 7 months
positioncursor-positionopenedopportunityworkspace
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.