Frontend developer

About the role

We are looking for a Frontend Developer (for a 2–3 month engagement) with strong expertise in React, Next.js 16, TanStack Query/Form, Zustand, Tailwind CSS v4, and strict compliance with FSD architecture.

You will build new features and evolve existing products in a modern high‑load web environment.
 

Develop new functionality: from requirements analysis to production release.

• Maintain and improve existing projects: refactoring, optimisation, bug fixing.
• Strictly follow FSD architecture (Feature‑Sliced Design):
• Design and implement features, widgets, entities and shared layer according to FSD principles.
• Integrate with backend APIs using TanStack Query (SSR/CSR).
• Implement forms with TanStack Form + Zod: validation, UX improvements, error handling.
• Manage application state with Zustand where global state is required.
• Build responsive, cross‑browser and accessible UI using Tailwind CSS v4.
• Optimise performance: work with RSC, caching, lazy loading, and code splitting.
• Collaborate on UI/UX design with designers/analysts.
• Participate in code review and architectural decisions, and improve internal engineering practices.

Requirements

• 3+ years of commercial experience in frontend development with React.
• Solid experience with Next.js (preferably App Router, SSR/SSG/ISR).
• Hands‑on experience with TanStack Query (including cache management and SSR/initial data).
• Experience with TanStack Form or readiness to adopt it quickly; confident with Zod.
• Experience using Zustand for global state management.
• Strong TypeScript skills (generics, utility types, strict typing).
• Excellent knowledge of Tailwind CSS (preferably v4) and responsive layout.
• Mandatory experience with FSD architecture (Feature‑Sliced Design):
• Understanding of layers: app/pages, widgets, features, entities, shared.
• Ability to design slice public APIs via index.ts.
• Ability to decompose tasks into widgets/features/entities.
• Good understanding of clean architecture, SOLID, and modular design.
• Ability to write clean, maintainable and readable code.
• English is sufficient for reading documentation; spoken English is a plus.

Nice to have

• Practical experience specifically with Next.js 16 (latest features, app router, RSC).
• Experience building design systems or UI kits.
• Performance optimisation background: profiling, Lighthouse, Web Vitals.