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Full Stack Software Engineer – Experimentation Platform Promotor and facilitator of hypothesis-driven experimentation

Bachelor / Master
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How do you make our customers happy? is transforming retail to simplify daily life for 11.5 million customers. Not in a vacuum, but together with ~35,000 partner sellers who enrich our retail tech platform with unique propositions. Naturally, we strive for ‘matches made in heaven’ – customer/partner interactions that leave both parties craving for more. Achieving this is challenging, given the volume of platform interactions and the fact we have few peers. So our 100+ tech teams constantly experiment with new ways to make customers happier and partners more successful. That requires a hassle-free experimentation platform that allows every team to (a) experiment to its heart’s content and (b) gauge the impact of changes.

The biggest challenge

Yes, is data-driven. But that isn’t enough. To leverage our data-driven mindset, we need clear insights into the effect of changes. The Experimentation team empowers development teams to use these building blocks to create better customer experiences. Our platform supports a culture of learning and promotes hypothesis-driven experimentation. Because the best learnings are derived from data and the wisest decisions are informed by it. We stimulate an experimental mindset by making it ridiculously easy for any team to set up an experiment anywhere within the ecosystem. If it’s not ridiculously easy, we’re simply not done yet!

Your responsibilities as Software Engineer - Experimentation Platform

  •  Contribute to an API that ties our platforms together, including our website and apps
  •  Work on a React application to manage experiments: from creation to evaluation
  •  Help design a data pipeline that crunches TBs of data to extract performance evaluation metrics on experiments
  •  Support the correct statistical interpretation of the data
  •  Facilitate teams and people to run tests autonomously

A successful Software Engineer in Team Experimentation needs a well-rounded skill set. We challenge you to roll up your sleeves and flex your coding and conceptual analysis muscles. Our platform encompasses a variety of technical areas, and you contribute to all of them. Sometimes a skill you picked up years ago will make the difference we’re looking for. Fantastic! Other times you will need to be adventurous and learn new tools and techniques. And become an even better all-rounder by collaborating closely with (and learning from) your team members – even if they operate light-years outside of your comfort zone!


As a member of our multicultural team, you will work on a comprehensive range of topics and partner with people from wildly diverging backgrounds and with different skill sets. Online controlled experiments aside, our work involves optimizing algorithms, e.g. for our expansive logistics and customer service operations. The impact you can have here is huge. Both on an organizational and a more personal level because the platform you create, manage and optimize, allows colleagues to experiment and shine. It’s the epicenter of the expertise center!

What we currently work with:

  • Mostly Java, Kotlin, React
  • Google Cloud Platform, for deployment (K8s) and data (BigQuery, Datastore, Postgres)

3 reasons why this is(n’t) for you

  • Yes, if you are enthusiastic about fostering a culture of learning in a large company
  • Yes, if you always get things done, regardless of the tech involved
  • Yes, if you are eager to reach out to other teams, so you can preach the gospel of hypothesis-driven setups
  • No, if business considerations are never your consideration; you code, therefore you are
  • No, if you loathe Agile and want to Waterfall your way to victory in a barrel
  • No, if you last LOLd as a toddler

Where you’ll work

At the premier online retail tech platform in the Netherlands and Belgium. A platform where 11.5 million Dutch and Belgian customers can choose from over 25 million articles. A platform that helps 35,000 commercial partners run their businesses. And a platform that will never be ‘finished’, because has been reinventing retail since 1999. And we always will be. If there’s a better way to do something, we’re on it! Together with our customers, partners, and over 2,000 colleagues. Our tech community shares an ambition to work hard and play hard in equal measure. The setting is pioneering, and we actively encourage autonomy. Our teams deploy their own code to the production environment. And you can socialize on our soccer field, in the games room and in the bar on Friday afternoons. Gezellig!

What you get

What you get

  • Money and more...

    Working at is challenging and therefore you get something in return. Besides salary, you will receive a yearly bonus, holiday allowance, holiday entitlement of 29 days, travel allowance, group insurance and more.
  • A blue and safe landing

    We warmly welcome our new colleagues, so they feel home as soon as possible. During your onboarding program, we give you all the ins and outs about!

How it works

  1. Carefully, we take a look at your application. Within 2 weeks you know if we invite you for an interview.
  2. We call you to set up an interview. And since we’re already talking: feel free to ask any question you may have.
  3. In this first interview we’ll get to know each other. We want to find out more about you. Work experience is interesting, but we also want to find out more about you as a person. Together, we’ll find out if this job is a match made in heaven.
  4. Before the next interview we will ask you to take an online assessment. We’ll also discuss the position and your team in depth.
  5. 2 interviews are usually enough to see if it’s a match. And if you agree… well, it’s the beautiful beginning of your career at :)

Any questions? Contact

Apply right away Will you be the romotor and facilitator of hypothesis-driven experimentation?

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