# OLEG PROSKURIN
**Senior Frontend Engineer & Tech Lead**

Remote · GMT+7 (EMEA overlap, AU overlap, US East AM) · Deel contractor, W-8BEN

usulpro@gmail.com · Telegram @usulpro · [LinkedIn](https://www.linkedin.com/in/oleg-proskurin-76784453/) · [GitHub](https://github.com/UsulPro) · [Dev.to](https://dev.to/usulpro) · [Blog](https://focusreactive.com/blog/author/usulpro/)

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## Summary

Senior Frontend Engineer and Tech Lead with 9 years of production experience across React, Next.js, TypeScript, and large component systems, including 5 years leading remote teams for US, UK, EU, and AU clients. I build and govern design systems: at PrimeUI ([primeui.com](https://primeui.com/), launched Feb 2026) I built and maintain a library of more than 200 React components together with the design-system tooling and the pipeline that composes them into production pages. Earlier I architected a multi-tenant, white-label Sanity backend for Tipico US that handled 75M requests/month across core and state teams.

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## Skills

**Web & Frontend**: React (18), TypeScript (5.x), Next.js (App Router, SSR/SSG/ISR), TanStack Start/Router. State management: Redux Toolkit + RTK Query, TanStack Query. Build tooling: Vite, Webpack. CSS at scale: Tailwind, CSS Modules, Emotion, Styled-Components

**Design systems & UI architecture**: design-system creation and governance across teams, shared component libraries, multi-tenant / white-label theming and design tokens, access-gated UI (route guards, conditional rendering), data-heavy dashboards (Chart.js), interactive maps (Mapbox GL), WCAG accessibility, Core Web Vitals & performance optimization

**Testing & quality**: Jest, React Testing Library, Playwright, Vitest, code review, architectural decision records

**Data & Infrastructure**: REST, GraphQL, WebSockets / SSE, PostgreSQL, Drizzle ORM, Docker. AWS (S3, CloudFront, Amplify), Vercel, Cloudflare, CI/CD (GitHub Actions, Bitbucket Pipelines, CircleCI), Sentry

**Headless CMS & eCommerce**: Sanity, Storyblok, Contentful, Payload, Hygraph, DatoCMS, Shopify, Stripe

**AI-augmented development**: Claude Code and Codex as daily drivers; built component-aware AI generation on Mastra + Vercel AI SDK; published an MCP server on NPM

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## Experience

### PixelPoint Ltd. — Tech Lead & Senior Frontend Engineer, PrimeUI
**Feb 2025 – Present** · France · Remote

PrimeUI ([primeui.com](https://primeui.com/), launched Feb 2026) is a multi-surface platform that generates production-ready websites from a curated React component library. Lead developer owning ~70% of platform architecture, with the component library, the design system, and the component-based page generation pipeline as my core areas.

- **Built and maintain the component library that is the core product asset**: more than 200 React components with props schemas, variants, and design constraints, organized into families and groups, curated and structured as a design system the whole platform builds on.
- **Built the design-system tooling**: an internal tool to define a project's visual identity (colors, typography, design tokens) and apply it across the library, so generated pages carry a consistent, per-project theme.
- **Built a component-matching scoring model** that evaluates how well adjacent components fit together: it compares their layouts, entry and exit widths, and component format, and produces a combinability score that ranks candidate compositions. Encodes component-pairing judgment as a reusable rule instead of ad-hoc decisions.
- **Set up the page generation pipeline**: composes components from the registry into full responsive pages, validating each against the component's props schema with retry recovery, then renders and previews before export.
- **Own the Studio web app frontend** (TanStack Start, React, TypeScript): a canvas-based sitemap interface of page nodes and their links, the generation/preview/editing UI, with WebSocket-based streaming of responses into the UI.
- **Designed the code-export pipeline** that ships a customer-owned, production-ready Next.js + Tailwind project (no vendor lock-in); published the `@primeuicom/mcp` server on NPM.
- **Run code review and architecture discussions as daily routine**; introduced Claude Code and Codex into the team workflow and built custom developer tooling on top (codex-bee, epic-loop).

### [FocusReactive](https://focusreactive.com) — Tech Lead & Senior Software Engineer
**May 2019 – Feb 2025** (5 yrs 10 mos) · London · Remote

International web consultancy for clients in the US, UK, Europe, and Australia.

- **Architected the Tipico US backend on Sanity Headless CMS as a multi-tenant, white-label platform**: white-label architecture for core and state teams, 5 publishing environments, 3 datasets. Operating scale: 122 CMS users, 75M requests/month, 98 document types, 165K stored documents.
- **Designed and built CMS-KIT**, an open-source Headless CMS starter and shared component library governed across 15 client projects and multiple teams, cutting kickoff from days to hours and accelerating development by ~30%.
- **Led migration of 15 client projects to Headless CMS and commerce platforms** (Sanity, Storyblok, Contentful, Payload, Shopify, Hydrogen), restructuring content models and cutting update cycles from weeks to days.
- **Built the data-heavy analytics and reporting frontend for Porchlight** (Compass real-estate platform, Next.js + tRPC): line-chart dashboards over market and area metrics (Chart.js, react-chartjs-2), interactive Mapbox GL maps with polygon-drawn geo-areas, and a PDF report pipeline where Puppeteer captures the rendered charts and @react-pdf/renderer assembles the document.
- **Led technical hiring and team development**: designed an assessment mirroring real working conditions, ran 30 interviews leading to 8 hires, mentored new engineers.

### [GitNation](https://github.com/GitNation/live-conferences) — Senior Software Engineer (Part-time, concurrent)
**May 2019 – Feb 2025** · Remote
Built a publishing flow via Slack API and a reusable web framework for conference websites; migrated GitNation conferences to Headless CMS.

### [Osome](https://osome.com/sg/) — Frontend Developer
**Jun 2018 – May 2019** · Singapore
Built a fuzzy-logic search system and advanced UI animations for the corporate-services platform; configured the Webpack build.

### [Skipp](https://www.skipp.dev) — JavaScript Engineer
**Nov 2017 – Jun 2018** · Moscow
B2B marketplace for Skolkovo Innovation Center (100 companies); GraphQL subscriptions for real-time chat.

### BL Group — Head of Engineering Team
**2010 – 2017** · Moscow
Led an engineering team designing automation and control systems for dynamic architectural lighting (50+ installations).

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## Open Source & Writing

- **Component tooling**: Storybook steering team during the 2016–2017 revival; maintain storybook-addon-material-ui (18K weekly downloads) and storybook-addon-console (7M total); published [@usulpro/color-picker](https://github.com/sm-react/react-material-color-picker), a Material-style React color picker with ~17K weekly downloads.
- **AI developer tooling**: [codex-bee](https://github.com/usulpro/codex-bee), a wrapper for long-running Codex sessions; [epic-loop](https://github.com/usulpro/epic-loop), a Codex skill for autonomous large-task execution via tech-lead / engineer role separation.
- **Technical writing**: articles on frontend, Headless CMS, and developer tooling at [FocusReactive blog](https://focusreactive.com/blog/author/usulpro/) and [Dev.to](https://dev.to/usulpro).

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## Portfolio

[PrimeUI](https://primeui.com/), [MarketFinance](https://focusreactive.com/marketfinance-case-study/), [Tipico Platform](https://focusreactive.com/sanity-platform-case-study/), [Firsty](https://www.firsty.app/), [IWM membership](https://www.iwm.org.uk/membership#membershipModal), [NotSoApp](https://focusreactive.com/notsoape-case-study/), [Porchlight](https://focusreactive.com/porchlight-case-study/), [GitNation](https://github.com/GitNation/live-conferences)

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## Education

**Master in Engineering**, Faculty of Electronic Engineering, Moscow Power Engineering University ([MPEI](https://mpei.ru/lang/en/Pages/default.aspx)), Russia

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## Languages

English C1 · Russian native

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Remote setup: Thailand, GMT+7 (EMEA and AU overlap, US East AM) · Deel contractor · W-8BEN on file · available immediately
