[Hiring] Senior Frontend Developer @Zexter

Role Description

We are now looking for a Senior Frontend Developer to help us build and scale our in-house platform. This is a hands-on, product-focused role for someone with strong React and TypeScript expertise, solid experience building production-grade applications, and the ability to take ownership of frontend development in a growing product.

• Develop and maintain scalable, high-performance frontend applications using React, Next.js and TypeScript.
• Design and implement robust frontend solutions, contributing to architecture decisions and improving existing systems.
• Build and deliver end-to-end product features, collaborating closely with backend developers, QA, design and product.
• Ensure code quality, performance and reliability through testing, code reviews, monitoring and continuous optimization.
• Contribute to development processes and frontend best practices, improving tooling, CI/CD, observability and overall engineering quality.

Qualifications

• 5+ years of commercial frontend development, including 3+ years with React, with experience owning and supporting production applications under real user load.
• Strong TypeScript skills: strict mode, generics, utility types, discriminated unions, and fully typed API contracts without any.
• Advanced React 18/19 & Next.js knowledge: hooks, render cycle, Suspense, Server/Client Components, App Router, SSR/SSG/ISR, middleware, caching and routing.
• Experience with TanStack Query, including query management, invalidation, SSR prefetching/hydration, persistent cache and optimistic updates.
• Ability to design and evolve large-scale frontend architecture: clear module boundaries, layered structure, public APIs, and gradual legacy migration without blocking feature development.
• Strong focus on code quality and testing: Vitest/Jest, React Testing Library, Playwright/Cypress, ESLint/Prettier, code reviews and Core Web Vitals optimization.
• Experience with modern frontend infrastructure and operations: Git, CI/CD (GitHub Actions/GitLab CI), Sentry, Docker and Node.js deployments.
• Solid understanding of API communication and web security: REST, WebSocket, authentication/refresh flows, CORS, CSP, XSS, SSRF and secure BFF patterns.
• Experience working in a cross-functional product team with backend, design and QA, plus hands-on knowledge of Tailwind CSS, Zod and internationalization (next-intl or equivalent).

Requirements

• Nice to have experience in iGaming, betting, fintech or other high-load domains with real-time data.
• Experience with admin panels and role-based access control.
• Node.js at the level of writing a BFF layer, proxies and small services.
• Monorepo experience: pnpm workspaces, Turborepo, Nx.
• Experience supporting legacy browsers and polyfills on a modern stack.
• Experience setting up observability: logging, tracing, dashboards.

Benefits

• Fully remote work.
• Competitive salary.
• Opportunity to work in a fast-growing international iGaming company.
• Strong Development and Product teams.
• Minimal bureaucracy and the opportunity to directly influence product quality.
• Clear career path with the opportunity to grow.
• Interesting challenges and modern tools.