Senior Full Stack Engineer

RELEX Solutions create cutting-edge optimization software to help retailers and consumer brands drive profitable growth. With growth comes opportunities, and we embrace both. Within our unified platform, our teams are driving change, working with international colleagues and the latest tech stack to develop solutions that transform into a pioneering end product; it’s tangible and impactful – for our customers and the world.

Our Technology Team

Our Technology team enjoys a challenge. They’re hungry to learn and don’t hesitate to ask what, why, and how. They get to work with our unique, in-house database engine to create high-quality scalable code (just imagine, thousands of stores, millions of products, and billions of rows of raw data!). Their expertise positively impacts the environment and business processes around the world; alongside international colleagues, they drive change and develop solutions that become our pioneering end product. From functional programming, machine learning, and interesting algorithms, to building big data pipelines, they’re behind it all. They can work in a flexible way, remote or in-office – after all, they contribute to all our achievements, so we reward them with genuine work-life balance and access to every opportunity.

Join us as a Full-Stack Engineer in Helsinki or Lisbon. You will be part of the Data Products team which is focused on developing tooling and infrastructure for managing data specifications and processing mission-critical data. We are a highly knowledgeable team with broad engineering skills and business knowledge.

What you will be doing:

• Develop user interfaces and associated backends for managing data specifications and data pipeline configuration
• Writing both unit and integration tests for improving reliability and maintainability of our codebase
• Take part in discussions in defining future needs and features for the user interfaces and API
  
  

What you need to be successful in this role:

• Proven experience in frontend development using React and TypeScript, and backend development using Python or other language
• Experience of writing robust frontend tests, backend tests and E2E tests
• Familiarity with working with relational databases (g. PostgreSQL)
• Knowledge of how to build good API interfaces
• Familiarity with deployment and test automation using CI/CD tools
• Strong problem-solving skills, being a collaborative team player
  
  

What we consider an advantage:

• You have used or developed design systems or component libraries
• Familiarity with data processing and pipelines
• Experience of containerised applications and/or Kubernetes
  
  

RELEXians can be found around the world. We’re passionate about using our technology to improve sustainability and change the world. Our office provides a great space for you to socialise, exercise and even take time out in our relaxing areas. We make sure our unique approach to flexibility and work-life balance comes across loud and clear; we’re conveniently located, there’s plenty of public transport and you can even bring your pet to the office!

Across RELEX, our people are supported and rewarded. As well as:

• Flexible and hybrid working
• Extensive physical and wellbeing support
  
  

We also offer a range of benefits to support you, your family and your life situation. We value your work-life balance and provide flexible hours with RELEX-specific parental leave agreements. We’re a diverse team of smart, motivated and fun people and this is reflected in our benefits offering in each country.

We’re on a journey with our pioneering technology and exciting growth, which is why we celebrate diversity and are committed to creating an inclusive environment for everyone. We can’t wait to see what challenges you’ll overcome and what problems you’ll solve. Join us and work with the best. Be curious. Be RELEX – apply today.

We will fill this position as soon as we find the right person so we recommend that you act quickly. Please apply before 27th August 2025.

If you have any questions about the role, Rebekka from our recruitment team will be happy to answer them (rebekka.gotter(at)relexsolutions.com).