Senior Fullstack (React+Next+Node), Madrid

• Develop and maintain React/Next.js applications with a focus on performance and scalability.
• Implement different rendering strategies to balance performance and SEO.
• Ensure high code quality through unit integration and end-to-end testing (Jest, React Testing Library, Cypress, etc.).
• Collaborate with backend engineers, designers, and product managers.
• Improve CI / CD pipelines (experience with GitHub Actions is a plus).
• Optimize applications for performance and accessibility.

We are seeking a highly skilled Senior Software Engineer to join our dynamic team. You would ideally have expertise in React JS, Node JS, Next JS, and Google Cloud Services. This role requires proficiency in English and Spanish and offers a hybrid work model.

Why choose us? - HIGH QUALITY PROJECTS. You will take part in demanding international projects. Show us what you're made of!, * Having strong experience in React JS, Next JS, and ideally Node JS.

• Having strong understanding of testing strategies and tools like Jest, Cypress or Playwright.
• Having experience with modern frontend build tools and state management libraries (Redux, Zustand, Recoil).
• Having familiarity with design tokens and UI consistency best practices.
• Having knowledge of performance optimization techniques (lazy loading, code splitting, asset management).
• Having understanding of accessibility best practices (WCAG compliance).
• Having experience with GitHub Actions for CI / CD automation.
• Having knowledge of Terraform and Infrastructure as Code (IaC).
• Having familiarity with performance monitoring and debugging tools.
• Having Full-stack experience (Node.js, GraphQL) is a plus.

• LATEST TECHNOLOGIES. We know you love the fascinating world of JavaScript, which is why you'll continue to grow in this field.

English and Spanish Required / Madrid-based Are you one of those Fullstack Engineers who loves to learn from and teach your colleagues, push yourself to the limit, and take part in very demanding projects with the latest technology? At Cognizant Spain we have got the Team that you'll want to be part of: great colleagues to count on, continuous training, and interesting projects!, * LEARNING. Your current knowledge is never enough, is it? You'll have access to learning platforms that will train you to become an expert or even start learning one of those skills you know you've been wanting to study. * TEAMWORK. This team will always be there for you! We know you're tough and have a no task too small attitude, but you'll always have a talented teammate to count on if you need to! * INTERNATIONAL TEAM. If you stand out among your peers because you've got great English communication skills, you'll be able to put that to good use! If its not your strongest suit, don't worry! Here's where you can improve it by working alongside teams distributed all around the world. * CAREER PLAN. It is a fact, here you'll grow in every direction: vertically towards gaining more responsibilities and increasing in category, and horizontally towards learning new technologies and becoming an expert in your business. * Restaurant tickets for every working day! * Permanent contract: you are here to grow with us! * Referral program: it's time to bring your colleagues to an awesome team and get rewarded for it! * Salary and bonuses: it's a matter of reaching an agreement. Well discuss it on our first call!, The Cognizant Community We are a high caliber team who appreciate and support one another. Our people uphold an energetic, collaborative and inclusive workplace where everyone can thrive. * Cognizant is a global community with more than 300,000 associates around the world. * We don't just dream of a better way - we make it happen. * We take care of our people, clients, company, communities and climate by doing what's right. * We foster an innovative environment where you can build the career path that's right for you., Cognizant is one of the world's leading professional services companies, transforming clients' business, operating, and technology models for the digital era. Our unique industry-based, consultative approach helps clients envision, build, and run more innovative and efficient businesses. Headquartered in the U.S., Cognizant (a member of the NASDAQ-100 and one of Forbes World's Best Employers 2024) is consistently listed among the most admired companies in the world.