Log in
All jobs
WO

Front-End Developer Level 3 (NO DQ)

Works on My Machine
Barcelona, Spain; Estonia; Helsinki, Finland; Lisbon, Portugal +1 more Posted Nov 12, 2026
Full-timeOn-site

About this role

Position Summary

We are looking for a Front-End Developer Level 3 to join our engineering team. This is a senior-level individual contributor role for an experienced front-end developer who can own complex features, make strong technical decisions, and help improve the quality and scalability of our front-end applications.

You will work closely with product, design, QA, backend engineers, and other front-end developers to deliver reliable, maintainable, and user-friendly product experiences.

Responsibilities

  • Design, build, and maintain complex front-end features and applications.
  • Take ownership of features from technical planning through implementation, testing, and release.
  • Develop scalable and reusable components using React and modern front-end technologies.
  • Make technical decisions around architecture, component structure, state management, and front-end patterns.
  • Integrate front-end applications with APIs and backend services.
  • Identify and resolve complex bugs, performance issues, and technical limitations.
  • Improve application performance, accessibility, responsiveness, and overall user experience.
  • Write clean, maintainable, well-tested, and well-structured code.
  • Lead and participate in code reviews, providing thoughtful technical feedback.
  • Collaborate with product managers and designers to evaluate requirements and identify technical considerations early in the development process.
  • Help define and improve front-end engineering standards, patterns, and development practices.
  • Identify opportunities to reduce technical debt and improve existing architecture.
  • Support technical planning and provide estimates for larger initiatives.
  • Mentor Level 1 and Level 2 developers and help them grow their technical skills.
  • Help troubleshoot production issues and contribute to long-term solutions rather than temporary fixes.

Qualifications

  • Strong professional experience with JavaScript, HTML, and CSS.
  • Advanced experience with React or a comparable modern front-end framework.
  • Strong understanding of component architecture and reusable UI patterns.
  • Experience with TypeScript.
  • Strong experience integrating with REST APIs and backend services.
  • Experience designing and implementing moderately complex front-end architecture.
  • Strong debugging, troubleshooting, and problem-solving skills.
  • Understanding of browser performance, accessibility, responsive design, and cross-browser compatibility.
  • Experience with automated testing and front-end testing strategies.
  • Strong knowledge of Git and modern software development workflows.
  • Ability to work independently with limited guidance and take ownership of complex work.
  • Strong communication and cross-functional collaboration skills.

Nice to Have

  • Experience with large-scale SaaS applications.
  • Experience working with design systems and shared component libraries.
  • Experience modernizing or migrating legacy front-end applications.
  • Familiarity with micro-frontends or applications that use multiple front-end frameworks.
  • Experience with front-end performance monitoring and optimization.
  • Familiarity with CI/CD and production deployment workflows.

Experience

  • Typically 4–7 years of professional front-end development experience.
  • Equivalent experience and demonstrated ownership of complex production applications may also be considered.

What Success Looks Like

A successful Front-End Developer Level 3 can independently own complex areas of the product, make sound technical decisions, and consistently deliver high-quality solutions with minimal oversight.

They are a trusted technical contributor within the team, help improve engineering standards, proactively identify risks and technical debt, and mentor less experienced developers. They contribute not only through their own development work but also by making the broader front-end team more effective.

Your next opportunity starts here

Prepare, apply, track, interview and get hired — all from one platform, with AI in your corner.

Download app

Or sponsor Premium for someone who's job hunting →