Senior Frontend Developer - React.JS

About Mindera

Mindera is a technology-driven company focused on building high-quality, scalable products through strong engineering practices, craftsmanship, and collaboration. We work closely with global clients to deliver modern, maintainable, and impactful digital solutions.

Role Overview

We are looking for a Senior Frontend Engineer with strong expertise in React, Next.js, and TypeScript to design and build high-performance, scalable web applications. You will work closely with product owners, designers, and backend engineers to deliver exceptional user experiences while maintaining high engineering standards.

Key Responsibilities

• Design, develop, and maintain scalable frontend applications using React, Next.js, and TypeScript
• Build reusable, modular, and well-tested UI components
• Implement SSR, SSG, and ISR using Next.js for performance and SEO
• Ensure application performance, accessibility, and cross-browser compatibility
• Integrate frontend applications with REST/GraphQL APIs
• Write clean, maintainable, and testable code following best practices
• Participate in code reviews, technical discussions, and architecture decisions
• Mentor junior engineers and contribute to a strong engineering culture
• Work in an Agile environment with continuous integration and delivery

Required Skills & Experience

• 6+ years of experience in frontend development
• Strong proficiency in JavaScript (ES6+) and TypeScript
• Extensive hands-on experience with React
• Solid experience with Next.js (SSR, SSG, routing, performance optimization)
• Experience with modern state management (Redux, Zustand, React Query, etc.)
• Strong understanding of HTML5, CSS3, responsive design, and modern styling approaches (CSS Modules, Tailwind, Styled Components, etc.)
• Familiarity with frontend testing frameworks (Jest, React Testing Library, Cypress)
• Experience working with RESTful APIs and asynchronous data handling
• Knowledge of Git and modern CI/CD practices

Good to Have

• Experience with micro-frontend architecture
• Exposure to GraphQL
• Knowledge of accessibility standards (WCAG)
• Experience working in product-based or consultancy-driven environments
• Familiarity with cloud platforms (AWS preferred)
• Understanding of performance monitoring and optimization tools

What We Value at Mindera

• Strong engineering mindset and craftsmanship
• Clean code, testing, and maintainability
• Open communication and collaboration
• Continuous learning and improvement

• Fun, happy and politics-free work culture built on the principles of lean and self-organisation;
• Work with large scale systems powering global businesses;
• Competitive salary and benefits.

About Mindera

At Mindera we use technology to build products we are proud of, with people we love.

Software Engineering Applications, including Web and Mobile, are at the core of what we do at Mindera.

We partner with our clients, to understand their product and deliver high performance, resilient and scalable software systems that create an impact in their users and businesses across the world.

You get to work with a bunch of great people, where the whole team owns the project together.

Our culture reflects our lean and self-organisation attitude. We encourage our colleagues to take risks, make decisions, work in a collaborative way and talk to everyone to enhance communication.

We are proud of our work and we love to learn all and everything while navigating through an Agile, Lean and collaborative environment.

Check out our Blog: http://mindera.com/ and our Handbook: http://tinyurl.com/zc599tr

Our offices are located: Aveiro, Portugal | Porto, Portugal | Leicester, UK | San Diego, USA | San Francisco, USA | Chennai, India | Bengaluru, India