# 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/) --- ## 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. --- ## 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 --- ## 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). --- ## 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). --- ## 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) --- ## Education **Master in Engineering**, Faculty of Electronic Engineering, Moscow Power Engineering University ([MPEI](https://mpei.ru/lang/en/Pages/default.aspx)), Russia --- ## Languages English C1 · Russian native --- Remote setup: Thailand, GMT+7 (EMEA and AU overlap, US East AM) · Deel contractor · W-8BEN on file · available immediately