BrainRocket is a general company creating end-to-end tech products for clients across Fintech, iGaming, and Marketing. We build what works, launch it fast, and make sure it hits. We're looking for a Senior Front-End Developer (React) to join our team in our office in Valencia.
~5+ years of professional front-end development.
~3+ years using React (16.8+) in production environments.
~ Strong proficiency in TypeScript, including strict-mode.
~ Hands-on experience writing unit tests (Jest) and E2E tests (Cypress or Playwright), with CI integration.
~ Experience with TanStack Query (or similar) for REST/GraphQL data-fetching.
~ Experience with React Hook Form (or equivalent) and schema-based validation for complex forms.
~ Knowledge of modern state management patterns using Zustand, Redux, or equivalent.
~ Familiarity with modern build tooling like Vite (preferred), Webpack 5, or similar ES-modules pipeline.
~ Intermediate level of English.
Proven ability to refactor large front-end codebases—optimising data-fetch patterns, state management, and component architecture.
Deep familiarity with modern data-grid libraries—preferably TanStack React Table 8 (virtualised rows, column meta, server-side filtering/pagination).
Familiarity with Storybook.
Maintain and enhance existing React/TypeScript UIs, emphasizing stability.
Collaborate closely with Product, Design, and Backend teams to deliver frontend features on schedule without sacrificing code quality.
Participate actively in code reviews, mentor teammates, and help maintain high standards for code hygiene, CI quality, and technical documentation.
Relocation package (tickets, staying in a hotel for 2 weeks).
Company fitness corner in the office for employees.
Breakfasts and lunches in the office (partially paid by the company).