Careers at Thermo-Calc

Are you ready to create intuitive, modern user experiences for complex scientific tools? Thermo-Calc Software in Solna, Sweden, is looking for a skilled Frontend Developer (React) to join our passionate team in shaping the future of materials science software.

We’re a fast-growing tech company at the intersection of engineering, research, and user-centered design. With customers around the globe and a product that truly makes a difference in research and industry, your frontend skills will directly contribute to innovation in materials development, sustainability, and beyond. Help us build the Future of Scientific Software!

Qualifications

• Strong experience with React and modern JavaScript/TypeScript frameworks
• Solid understanding of frontend architecture and state management (e.g. Redux, Context)
• Solid understanding of HTML5, CSS3, and modern CSS frameworks (e.g., SASS, Styled Components, Tailwind)
• Experience with REST APIs and integrating complex backend logic into the UI using tRPC
• Familiarity with version control systems like Git and Continuous Integration such as Jenkins
• Strong communication skills and a collaborative mindset
• A degree in Computer Science or equivalent experience

Meritorious

• Knowledge of backend tools like Java Spring Boot
• Familiarity with cloud platforms (Azure, AWS, or Google Cloud)
• Exposure to containerization tools (Docker, Kubernetes)
• Experience integrating scientific or numerical code into a GUI
• Agile development experience (Scrum, Kanban, etc.)

Responsibilities

As Frontend Developer, you’ll take a leading role in developing the user interface for our next-generation web platform. Working in a cross-functional environment with backend developers, FORTRAN specialists, designers, and scientists, you’ll ensure that complex scientific workflows are transformed into elegant, user-friendly web applications.

You’ll primarily work with React, TypeScript, and modern frameworks such as Fastify, alongside Spring Boot and Azure on the backend. Your focus will be on delivering robust, scalable, and visually intuitive frontends that meet high technical and usability standards.

In this role, you will:

• Design and build dynamic, interactive web interfaces using React and TypeScript
• Collaborate with backend and scientific developers to integrate advanced functionality
• Maintain a high standard of UI performance, accessibility, and responsiveness
• Contribute to architectural decisions and continuous improvement processes
• Participate in code reviews and team discussions to maintain quality and consistency
• Stay updated on frontend trends, tools, and best practices

Compensation and Benefits

Thermo-Calc Software takes actions to be an attractive employer that not only offers competitive compensation and benefits, but also a stimulating environment to work in with colleagues from all over the world. Our head office is located in Solna with a light and modern environment and short walking time to Solna station and Mall of Scandinavia. Our company values a spirit of teamwork and inclusiveness where we all work together to create the best possible products and services for our users. We also offer all employees:

• A comprehensive health and benefits package that includes extended health coverage, regular health checks, pension, and a generous bonus.
• Continuing education opportunities in the areas that you would like to develop.
• A flexible work schedule which includes flex time and the opportunity to work from home.

How to Apply

Selection is ongoing, so please submit your application as soon as possible. We are collaborating with Randstad Digital for this recruitment. If you have any questions about the role or the process, feel free to contact Julia Rhönnstad at julia.rhonnstad@randstad.se. Welcome to a workplace where your code truly matters.

Apply Today!