HEY, I’M EDUARD KRAMARENKO
Senior full-stack engineer, 9+ years shipping high-performance products end-to-end across mobile, web & backend — React, React Native, Node & Go.
I take products from a blank repo to the store — robust architecture, complex UIs, the APIs behind them, performance & CI/CD. Nine years full-stack across mobile, web and backend in e-commerce, fintech, marketplaces and sports — I lead and mentor teams.
Owned the end-to-end booking flow for a European travel platform with 1.5M+ users — RN + TypeScript client, Node/Go service layer and APIs; migrated key screens from WebView to native (~20× faster). Agentic coding with Claude Code daily.
Built the live match Commentary feature — real-time WebSocket backend plus client — for a fan app serving 15k daily users (100k on match days); shipped SSO auth across iOS & Android.
Architected 2 apps, their Go/GraphQL APIs and CI/CD from scratch for a football transfer marketplace (200+ clubs, 1,000+ players); contributed to a 12% sales increase.
Portfolio tracking, social feed & real-time trades — client and streaming backend — for a regulated EU fintech (2M+ users, 4.7/5); cut crash rate >60% and lifted onboarding 18%.
Membership, auth & Apple Pay — client plus checkout/payment services — for a B2B marketplace handling 22k+ orders/day across 40k+ SKUs; drove the native-app move (~3× faster load).