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Serhii Kuznetsov

Services

What I can build for you

Front-end work in Next.js and TypeScript, from a single landing page to a product with its own backend and mobile app. Each item links to a project where I have already done it.

  1. 01

    Product front ends

    Complete product interfaces in Next.js and TypeScript: accounts, forms validated on both ends, subscriptions, notifications — built to be maintained for years, not to demo once.

    See it in

  2. 02

    Fast landing pages

    Marketing pages with motion that stays on the compositor and full UA/EN localisation, checked with Lighthouse on the production build rather than promised.

    See it in

  3. 03

    Real-time features

    State shared between people — presence, reconnection, server-authoritative data — designed so what one person sees cannot be read early from the network tab.

    See it in

  4. 04

    Accessibility

    Components that work from the keyboard and with a screen reader, verified with axe scans and keyboard-only end-to-end tests instead of just labelled accessible.

    See it in

  5. 05

    WebGL and heavy data

    GPU rendering where the DOM gives out: a million points in one draw call, work moved to Web Workers, and interactive three.js scenes with a lighter fallback for phones.

    See it in

  6. 06

    Tests that catch bugs

    Playwright end-to-end suites, component and unit tests, and CI that runs them on every push — aimed at the flows that would actually cost you users when they break.

    See it in

Something like this on your roadmap?

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