Senior Frontend Software Engineer - React.Js or Next.Js - Contractor

Here at Mindera, we are continuously developing a fantastic team, and would love it for you to join us.
We are looking for a Frontend Software Engineer who not only brings strong technical skills but also excels in team fit, communication, and collaboration.

You will be responsible for designing and building high-performance, secure, and scalable front-end solutions — with a strong focus on React and modern JavaScript to create seamless, isomorphic applications.

If you are approachable, communicate clearly, and enjoy working in a collaborative and positive team environment, we’d love to hear from you.

Requirements

• Soft Skills – Top Priority
• Clear and effective communication, able to express ideas and collaborate efficiently in a team.
• Strong English proficiency.
• Approachable and easy to work with, contributing to a positive team atmosphere.
• Team fit is key — we value people who are enjoyable to work with as much as technical skills.
• Technical Skills
• Strong experience in React.js (experience with Next.js is a plus).
• Experience working with Redux or similar state management tools.
• Familiarity with GraphQL and REST APIs.
• Solid skills in HTML5, CSS3, and CSS pre/post-processors (SASS, LESS, PostCSS).
• Experience with testing frameworks such as Jest, React Testing Library, and Enzyme.
• Knowledge of performance optimization, observability tools (e.g., Grafana, Core Web Vitals), SEO, and accessibility best practices.
• Varied tech experience is highly valued — exposure to different stacks and environments.
• Ways of working
• Agile methodologies such as Scrum and Kanban.
• Passionate, self-driven, and comfortable working with little supervision.

Benefits

To be defined

Most of all You get to work with a bunch of great people, where the whole team owns the project together in a politics-free environment. Our culture reflects our lean and self-organization attitude. We encourage our colleagues to take risks, make decisions, work in a collaborative way and talk to everyone to enhance communication. Freedom and Responsibility go hand in hand, and we value commitment, feedback, and empathy.

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 products 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 management 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 and our Handbook!

Our offices are located: Porto, Portugal | Aveiro, Portugal | Coimbra, Portugal | Leicester, UK | San Diego, USA | San Francisco, USA | Chennai, India | Bengaluru, India | Cluj-Napoca, Romania