Микола

MYKOLA BLONSKYI
Frontend Engineer — React / TypeScript (Full-Stack: Next.js / NestJS)
Valencia, Spain | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section)
Work authorization: Temporary Protection status (Spain) — authorized to work in Spain | Available: Immediately
SUMMARY
Frontend Engineer with 12+ years shipping production React/TypeScript, including 8 years at Vimeo (350M+ registered users). Built
AI-powered features end-to-end — from internal API design to UI — plus real-time, high-concurrency systems for live video. Open to
remote roles worldwide, or on-site/hybrid roles in Valencia, Spain.
PROFESSIONAL EXPERIENCE
Frontend Engineer 03/2018 – 04/2026
Vimeo Ukraine Technologies Zaporizhzhia, Ukraine
Core member of a 6-person cross-functional team building Vimeo's video platform and enterprise video infrastructure.
• Scaled Video Translation from 7 to 30+ supported languages and enabled multi-language viewing via dynamic audio/video track
switching, delivered to Vimeo's entire user base, by designing internal RESTful APIs for AI-processed data and building the
React/TypeScript UI layer.
• Shipped AI-generated Video Highlights, Summaries, and Q&A, extending Vimeo's AI feature set platform-wide, by building end-
to-end UI components on top of new internal AI APIs.
• Cut permission-management overhead for enterprise clients by delivering a Role-Based Access Control system supporting 5+
permission tiers, by designing a scalable RBAC UI and data model.
• Powered real-time audience engagement during live broadcasts by engineering a high-concurrency, Firebase-backed live chat
with real-time polling and "Favorite Questions," by implementing WebSocket-driven state sync across concurrent viewers.
• Enabled recurring live-event scheduling for enterprise customers by building the Recurring Live Events feature end-to-end, using
React, TypeScript, Zustand, and Redux on a PHP/MySQL backend.
• Reduced regressions across releases by driving RESTful API design and documentation, backed by test coverage in Jest, Mocha,
and PHPUnit.
Frontend Developer 12/2014 – 02/2018
Proximo Team Zaporizhzhia, Ukraine
• Delivered cross-browser web interfaces (JavaScript, jQuery, Angular 1, SCSS), including interactive mapping (Google Maps API) and
dynamic dashboards (Chart.js).
Frontend Developer 10/2011 – 11/2014
FlickShine Remote
• Built and maintained custom WordPress themes (HTML, CSS, PHP) for NYC-based business clients.
PERSONAL PROJECTS
• blonskyi.dev — Personal platform (hub + identity): Next.js 15 hub (Auth.js v5, Drizzle, PostgreSQL, next-intl, Vitest + Playwright)
with per-project access control, plus login.blonskyi.dev — an OpenID Provider written in Go (zitadel/oidc: PKCE, JWKS, refresh,
introspection) that every subdomain consumes as a real OIDC client. GitHub Actions → GHCR → self-hosted deploy.
• fitness.blonskyi.dev — Fitness PWA (live): Next.js App Router + TanStack Query/Virtual + Zustand frontend, NestJS + Drizzle +
PostgreSQL backend in a pnpm monorepo; Python/FastAPI worker (OpenCV/MediaPipe pose analysis) over Redis, MinIO
presigned uploads, offline-first write queue, i18n (en/uk/ru/es), CI/CD.
• todo.blonskyi.dev — Task app (live): Next.js + NestJS GraphQL (code-first, chosen over schema-first) + Prisma + PostgreSQL;
shared lists, Google Calendar sync, recurring templates, six switchable layouts, PWA; Vitest/RTL, Jest, Playwright e2e. Also: Crypto
Coach AI — FastAPI + Next.js SaaS with Claude-generated explanations, NextAuth OAuth, LemonSqueezy billing, Vercel + Railway.
SKILLS
Languages: JavaScript (ES6+), TypeScript, PHP
Frameworks: React, Next.js (App Router), NestJS, Angular
State Management: Redux, Zustand, TanStack Query, Zod / react-hook-form
Styling: SCSS, CSS Modules, Styled Components
Backend / DB: Node.js, PHP, Go (OIDC provider), Python/FastAPI (working), PostgreSQL, MySQL, Prisma, Drizzle, Redis, Firebase
Testing: Vitest, Jest, React Testing Library, Playwright (e2e), Mocha, PHPUnit
Tools: Docker / Compose, GitHub Actions CI/CD, Git, Webpack, MinIO, Vercel / Railway, Figma
AI / APIs: RESTful APIs, GraphQL, WebSockets, OAuth 2.0 / OIDC, Anthropic Claude API integration, AI-assisted development (Claude Code)
EDUCATION
Master's — Computer Science: Software Engineering of Automated Systems 09/2007 – 06/2011
Classic Private University Zaporizhzhia, Ukraine
Languages: English — Upper-Intermediate (B2) Ukrainian — Native Russian — Bilingual