Senior Front End Developer

hace 7 días

Madrid, Madrid, España OpenVPN A tiempo completo
About the role

We're seeking a Senior Frontend Engineer to help build our AI-driven Zero Trust Network Access (ZTNA) platform. It provides real-time policy enforcement, secured remote access for enterprise endpoints.

You'll design and develop AI-driven interfaces that will make the experience outstanding for end users.

Important:

  • This will be a permanent employment opportunity for candidates based in Spain, Germany, and Poland. If you prefer a B2B contract, please indicate it in your application form.
Key Responsibilities
  • Build scalable frontend architecture using React 19, TypeScript, and Redux Toolkit or similar frameworks, following our strict layered architecture
  • Develop AI-powered feature,s including real-time chat using Server-Sent Events (SSE), message streaming, and intelligent user interactions
  • Design and maintain our design system with Vanilla Extract synchronized with Figma designs
  • Write clean, testable code with comprehensive unit tests using Vitest
  • Collaborate cross-functionally with Product, Design, Backend, and AI teams to define and ship features
  • Optimize application performance
  • Leverage AI-assisted development with Claude Code or similar agents to accelerate feature development while adhering to our architectural patterns
  • Participate in code reviews and architectural decisions
  • Stay up to date with the latest front-end technologies, frameworks, and best practices
  • Ensure seamless integration with backend APIs and services
Tech Stack You'll Work With
  • Core: React 19, TypeScript 5.9, Rsbuild (Rspack), Redux Toolkit 2.10, RTK Query
  • UI: HeroUI (NextUI fork), Tailwind CSS 4, Vanilla Extract
  • Forms: React Hook Form, Valibot
  • Routing: React Router 7
  • Testing: Vitest, React Testing Library
  • Code Quality: Biome, SonarQube
  • Monitoring: Sentry
Required Qualifications
  • 5+ years of professional experience in frontend development
  • Deep understanding of HTML5, CSS3, and TypeScript.
  • Redux experience with Redux Toolkit, RTK Query, and complex state management
  • Testing skills with unit testing frameworks (Vitest, Jest) and React Testing Library or similar
  • RESTful API integration with async data handling, caching strategies, and error management
  • Build tools experience with Vite, Webpack, Rsbuild, or similar modern bundlers
  • Problem-solving abilities with debugging complex React applications and performance bottlenecks
  • Understanding of CI/CD pipelines and familiarity with Git workflows
  • Comfortable with AI-assisted development and willing to adopt modern AI coding tools
Nice to Have
  • Experience with or full-stack JavaScript environments
  • Tailwind CSS, CSS-in-JS (Vanilla Extract preferred)
  • Biome, ESLint, or Prettier configuration and code quality tooling
  • Sentry or similar monitoring tools for error tracking and performance monitoring
  • Docker for containerization and deployment pipelines
  • Familiarity with UI/UX design principles and Figma
  • Contributions to open-source projects or active participation in the developer community
What We Offer
  • Competitive salary and performance-based bonuses
  • Remote-first and flexible work arrangements
  • Access to modern tools, technology, and professional development resources
  • Inclusive, transparent, and collaborative work culture
  • Opportunities for rapid career growth in a scaling technology company

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