Senior React 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're partnering with one of our clients to find a Senior Front-End Developer to join a high-performing engineering team working on modern digital platforms at scale. What you'll do Develop and maintain scalable web applications using React and NestJS Collaborate closely with product managers, designers, and backend engineers Contribute to architectural decisions and technical improvements Ensure code quality through testing, code reviews, and best engineering practices What we're looking for 5+ years of experience in software development, with a strong focus on frontend engineering Proven experience building applications with React Solid experience working with NestJS Strong understanding of JavaScript/TypeScript, modern frontend architecture, and best practices Experience designing and consuming RESTful APIs Knowledge of testing frameworks and CI/CD practices Ability to work in agile, collaborative, and international environments Good communication skills in English Nice to have Experience with cloud environments (AWS, Azure, or GCP) Knowledge of microservices architectures Experience in retail, ecommerce, or customer-facing digital products What do we offer? Permanent contract. Hybrid policy work. (1 day office, 4 days home office) Competitive salary. Flexible Remuneration (Meal vouchers, kinder garden, Public Transport/Mobility) Private health insurance (including dental care). UDEMY Business member platform with a lot of on-line learnings (certifications, courses, etc). Individual yearly training and certification budget. Flexible schedule. Intensive Fridays and July and August. Data protection notice SQLI ensures that applicants’ personal data are processed as required by the EU General Data Protection Regulation (GDPR) and Spanish Law 3/2018 on Data Protection. Personal data is processed solely for the purpose of the selection procedure.