Tech Life at RELEX
You code, the planet benefits

At RELEX, you’ll develop products that have a concrete, positive impact on the world. Our products help retailers and consumer goods brands optimize their supply chain and retail planning processes, increasing the availability of goods on the shelves while decreasing food waste and carbon emissions from transportation. With us, you can do incredible, meaningful things—and have a life outside of work.

What it’s like to work at RELEX

Our culture

Challenge your skills

We have big customers with big needs, so your skills will be put to the test. Our software must be able to tackle large amounts of data, so you’ll work with a unique, in-house database engine built to serve our specific needs, with terabytes of RAM and hundreds of CPUs. We produce reliable, high-quality code that’s scalable to the world’s largest retailers: thousands of stores, millions of products, and billions of rows of raw data.

Each team decides how to reach their goals, and our tech stack is a mix of languages and tools. You’ll be able to work with functional programming, machine learning and interesting algorithms, building big data pipelines, and highly mathematical challenges related to performance and concurrency, among other things.

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Person working on a computer

Enjoy autonomy

If you enjoy a laid-back, small-company spirit where the CEO is just like any other colleague, if you’re passionate about what you do, if you take pride in your work—then you’ll fit right in at RELEX. At RELEX, you’re part of a culture in which software development teams can organize themselves and choose the way they work most efficiently. There are plenty of challenges to take on, both in quantity and variety, and you have the freedom to tackle them on your own terms—as long as you can communicate why and how.

Grow your expertise

Your professional development and personal growth are important to us. In tech roles, you get to dedicate up to 20% of your working hours to innovation and learning. Knowledge sharing plays a key role: our people support and mentor each other. Our team is incredibly skillful, and you may find that you’re hardly ever the smartest person in the room. If you’d like to join us in building something that’s never been done before, hit us up.

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Technologies we use

Our teams can decide the technologies they use, but here are the most common ones.


React, TypeScript


Java, Haskell, Ruby, Elixir, Golang, Kotlin, Scala, Node.js, .NET Core


Azure, Kubernetes, Terraform, Terragrunt, GitLab, Kafka, Snowflake, GraphQL, ClickHouse, Temporal, Beam, Dataflow, gRPC, GCP


JMeter, Cypress, Robot Framework

Join our team

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Hear it from us

What our tech people think about us

First Months in the New Lisbon Tech Hub

For the people who look from the outside, it (retail logistics) might sound simple (order from suppliers, distribute to stores and then sell), but it is much more complex and has a lot of specialties. It’s been interesting to learn more about all that and see how better planning can help improve not only a retailer’s profit but also reduce waste.

Four person posing for a picture

Problem-Solving and Appreciating the Product Rita’s Journey to a Software Developer at RELEX

‘Colleague is a friend’ is one of the main values we live by at RELEX. We aim to have a low hierarchy where colleagues are treated as equals. One of our guiding principles is to respect expertise, which is easy to do with a house full of brilliant minds, whether it be women, men, or non-binary RELEXians.

Three Reasons for A Senior Data Scientist to Fall in Love with RELEX Labs

“In general, the three things that make me want to stay year after year are interesting and challenging job, opportunity to solve new problems creatively, and smart management”, Aki says.

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Careers blog

Stories about our people

Familiarize yourself with the RELEX way of thinking through our career stories and blog posts on technology, culture, and more.

Join our team

Did we convince you to ‘Be RELEX’? Great!

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Where you can find us

Our product development is located at our headquarters in Helsinki, Finland, but you can also work from our recently opened technology branch in Lisbon, Portugal. We also have tech teams in Atlanta (US), Stockholm (Sweden) and Stoke (UK). Choose your location and join us in developing the leading supply chain and unified retail planning platform.