Senior Frontend Engineer, Join

• Our mission as Frontend Guild is to provide JOIN’s customers and their candidates with a smooth UX experience, simplified and beautiful UI, and rich functionality to achieve their goals by using our data-rich capabilities
• We strongly believe that Frontend engineering should be collaborative with product and design teams, that our UI is diverse and has accessibility and security in mind
• We take care of our guild’s tools by building a robust and Figma-synced Design System, code generators and coding conventions to create consistency, avoid wasting time on scaffolding and clutter, and focus on the business logic and customer value
• Stability is our utmost priority, hence we write E2E tests for all scenarios and optimize performance to make our product feel a bliss to use
• ✔ 4+ years of experience as a Frontend Engineer working with modern JavaScript frameworks (React preferred)
• ✔ Strong understanding of TypeScript, HTML5, and CSS3
• ✔ Solid experience with state management libraries (Redux, Zustand, or similar)
• ✔ Knowledge of API integration patterns and data fetching (REST, GraphQL)
• ✔ Familiarity with testing frameworks such as Jest, React Testing Library, or Cypress
• ✔ Understanding of CI/CD pipelines and version control using Git
• ✔ Experience working collaboratively in cross-functional Agile teams
• ✔ Strong focus on performance, accessibility, and usability
• Don’t meet every requirement? No problem! We’re always open to exceptional candidates and value diversity in all forms

Desirable

• As our Frontend Engineer in Spain, you’ll join an established and growing engineering hub that has already become a strong part of our organisation
• You’ll play a key role in shaping the future of our product and platform, working with a modern tech stack to build robust, scalable features that create real impact
• It is about strengthening and further evolving a mature engineering environment, contributing to technical standards, and helping us continue to raise the bar together
• Your work will directly shape how thousands of users experience JOIN. As a Senior Frontend Engineer, you’ll take strong ownership of delivering high-impact features end-to-end
• Own frontend feature delivery end-to-end – from technical discovery and solution design to implementation, testing, rollout, and monitoring in production
• Translate product requirements into scalable technical solutions, proactively identifying edge cases, UX trade-offs, and performance implications before implementation begins
• Build complex, maintainable React components and application flows using TypeScript and modern frontend architecture principles
• Drive technical quality within your scope by writing robust unit, and end-to-end tests and ensuring high reliability of shipped features
• Actively contribute to architectural discussions, proposing improvements to frontend structure, state management patterns, performance optimisation, and scalability
• Collaborate closely with Product and Design during discovery, challenging assumptions and ensuring solutions balance user experience, feasibility, and speed
• Monitor and optimise performance and user experience in production, using metrics, logs, and analytics to continuously improve feature impact
• Support incremental improvements to the Design System and shared components when feature development requires enhancements
• Mentor less experienced engineers through collaboration and knowledge sharing (without formal people management responsibilities)

• We respect your time and keep things transparent:
• 1️⃣ Intro call (~30 min) – Let’s see if we’re a good match
• 2️⃣ Hiring Manager Review – Your profile is assessed for technical and team fit
• 3️⃣ Hiring Manager Interview (~60 min) – Dive into expectations and team dynamics
• 4️⃣ Technical Interview (~60–120 min) – Demonstrate your skills
• 5️⃣ Meet the Team (Optional) – Connect with your future colleagues
• You’ll always know where you stand - no black holes, no ghosting