Senior Frontend Developer

Responsibilities

• Build and develop scalable frontend applications using React and TypeScript
• Contribute to application architecture, structuring, and performance improvements
• Work closely with UX/UI, product, and backend teams
• Ensure high standards in code quality, maintainability, and performance
• Take part in technical discussions and contribute to best practices
• Work in complex enterprise environments with modern development setups
• Expert in React + TypeScript / JavaScript
• Strong experience in building scalable frontend applications
• Good understanding of APIs and backend ecosystem ( Node.js, Nest.js, Next.js... )

Requirements

• 5-10 years of experience in frontend development
• Experience working independently with strong sense of ownership
• React + TypeScript expertise (production level)
• Advanced JavaScript fundamentals (async, closures, event loop)
• Frontend architecture and state management (Redux, modular design)
• Ability to explain technical decisions clearly in English
• Strong collaboration with UX/UI and backend teams
• Experience with design systems and reusable component libraries
• Performance optimization (SSR/CSR, lazy loading, Core Web Vitals)
• Full-stack awareness (Node.js, APIs, data layer)
• Mentoring and code review experience
• Strong problem-solving mindset in complex environments
• Experience working in ecommerce environments
• What do we offer?
• Hybrid policy work
• Permanent contract.
• Competitive salary.
• Flexible Remuneration (Meal vouchers, kinder garden, Public Transport/Mobility)
• Private health insurance (including dental care).
• Udemy platform with a lot of on-line learnings (certifications, courses, etc).
• Individual yearly training and certification budget.
• Work Schedule Monday to Friday.
• Intensive working hours on Fridays and all week in July and August.
• Full salary coverage for sick leave.
• A smooth and clear recruitment process
• CV Screening
• HR Online Interview (30 min)
• Tech Interview (45 min)
• Interview with Hiring Manager (1h)
• Data protection notice
• https://www.sqli.com/int-en/privacy-center-hub

Benefits

Additional Information

We are looking for a Senior Frontend Developer with strong experience in React and modern frontend architecture to join our team in Spain. You will work in an international environment on enterprise-level platforms, collaborating closely with design, product, and backend teams to build scalable and high-quality frontend solutions.

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