Senior Frontend Engineer - ReactJS

Senior Frontend Engineer (React):
Building and optimizing robust, scalable features for a recruiting platform with an accent on frontend architecture, state management, and end-to-end feature ownership. Focus on driving technical quality, implementing complex React components, and ensuring high performance and accessibility in a mature engineering environment.

Location:

Must be based in or be able to relocate to Barcelona, Spain (Hybrid role).

Salary: €67,000–€80,000 per year.

JOIN is a recruiting software startup building intuitive and powerful tools to make the hiring process fast, easy, and fair for companies of all sizes.

• Own the delivery of high-impact frontend features end-to-end, from technical discovery and design to implementation and monitoring.
• Translate product requirements into scalable technical solutions, proactively managing UX trade-offs and performance implications.
• Develop complex, maintainable React components and application flows using Type Script and modern architectural principles.
• Drive technical quality by implementing robust unit and end-to-end testing strategies.
• Collaborate with Product and Design teams to balance user experience, feasibility, and development speed.
• Mentor junior engineers through knowledge sharing and code collaboration.

• 4+ years of experience as a Frontend Engineer working with React.
• Strong proficiency in Type Script, HTML5, and CSS
  3.
• Solid experience with state management libraries like Redux or Zustand.
• Practical knowledge of API integration patterns (REST/GraphQL) and CI/CD pipelines.
• Familiarity with testing frameworks such as Jest, React Testing Library, or Cypress.
• Must be based in Barcelona or willing to relocate to Spain.

• Experience contributing to or maintaining a Design System.
• Familiarity with Figma and UI collaboration workflows.
• Exposure to backend concepts or full-stack environments.
• Experience with analytics or A/B experimentation tools.

• Competitive salary tailored to your experience.
• Provision of high-quality Apple hardware (Mac Book).
• Hybrid work model with flexibility to work from home.
• Relocation support including assistance with paperwork and initial accommodation.
• Team events including brunches and quarterly gatherings.
• Growth-oriented startup environment emphasizing ownership and collaboration.

• Introductory call and Hiring Manager interview.
• Technical evaluation and team fit discussion.
• Transparent process with timely feedback throughout.