Senior Frontend Developer

We Elevate. Digitally.

SQLI is a European leader in digital transformation and customer experience, helping major international brands drive growth through technology. From strategy to implementation, we design and deliver high-performance architectures and engaging digital experiences by combining advanced technologies, proven methodologies, and deep technical expertise. 

With 2,200 people across 12 countries, we’re looking for passionate individuals who share our values: Creative Spirit, Commitment, and Forward Thinking. 

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.



What you will do

• 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)

Skills & experience

• 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

Nice to have

• 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

SQLI Group ensures that applicants' personal data is processed as required by the European Union and the German Federal Adminstration. Personal data is processed for the purpose of carrying out the hiring process and joining to our talent community. You can exercise your rights in terms of General Data Protection and digital guarantees through [email protected] or [email protected].

https://www.sqli.com/int-en/privacy-center-hub