Senior Frontend Engineer - TypeScript and React

Based in Valencia or Prague., * Own and deliver complex frontend initiatives independently across mission-critical, high-traffic B2B applications.

• Lead frontend architecture decisions, including React, TypeScript, state management, and design system evolution.
• Drive modernization efforts by refactoring legacy UI codebases into scalable, maintainable frontend platforms.
• Champion AI-assisted development, using tools like Cursor, Claude, or Copilot hands-on; mentor teammates on best practices and prompt workflows.
• Collaborate closely with Backend, Product, Design, and Data teams to translate business requirements into elegant user experiences.
• Communicate trade-offs around performance, accessibility, UX, and delivery timelines clearly to both technical and non-technical stakeholders.
• Ensure operational excellence by maintaining frontend observability, performance budgets, error monitoring, and documentation., * UX & Architectural Impact: Improving frontend consistency, performance, and developer experience across the team.
• Mentorship: Coaching junior engineers and raising the frontend quality bar.
• Risk Management: Proactively identifying UI/UX and performance risks before they impact customers.
• AI Adoption: Actively helping the team adopt AI tools to accelerate delivery responsibly.

Do you have experience in UX?, * 6+ years of frontend engineering experience, with deep expertise in TypeScript and React.

• Strong fundamentals in modern frontend architecture: component design, state management, data fetching, and API integration.
• Experience building and maintaining production-grade web applications in high-traffic environments.
• Proven ability to optimize performance, accessibility (a11y), and responsiveness.
• AI-native workflow: hands-on experience integrating AI coding tools into daily frontend development.
• Excellent communication skills and the ability to work cross-functionally in fast-moving teams., * Experience building B2B, E-commerce, or marketplace user interfaces.
• Familiarity with design systems, Storybook, and scalable UI libraries.
• Experience with Next.js, server-side rendering, or micro-frontend architectures.
• Exposure to backend technologies (Node.js, GraphQL, REST APIs).
• Open-source contributions or experimentation with AI-powered UX features., Frontend engineers who take end-to-end ownership, embrace AI-first development, and balance speed with long-term maintainability. If you enjoy building high-quality user experiences that empower real businesses at scale, we'd love to hear from you.

Groupon is a marketplace where customers discover new experiences and services everyday and local businesses thrive. To date we have worked with over a million merchant partners worldwide, connecting over 16 million customers with deals across various categories. In a world often dominated by e-commerce giants, we stand out as one of the few platforms uniquely committed to helping local businesses succeed on a performance basis. Groupon is on a radical journey to transform our business with relentless pursuit of results. Even with thousands of employees spread across multiple continents, we still maintain a culture that inspires innovation, rewards risk-taking and celebrates success. The impact here can be immediate due to our scale and the speed of our transformation. We're a "best of both worlds" kind of company. We're big enough to have the resources and scale, but small enough that a single person has a surprising amount of autonomy and can make a meaningful impact., Groupon is entering its next phase of transformation with an aggressive AI-first strategy and a modern engineering stack. As a Senior Frontend Engineer in the B2B Engineering team, you will play a critical role in designing and building intuitive, high-performance user experiences that power deal creation, management, and growth for local businesses worldwide. This role is ideal for engineers who thrive on technical ownership, care deeply about UX quality and performance, and actively leverage AI tools to move faster without sacrificing craftsmanship.