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Backend Developer (Python, Java)

Lefebvre Sdu

Den Haag, Zuid-Holland
Product & Technology
Publié le 13 novembre 2026

Description du poste

Legal AI is only as good as the knowledge behind it. At Lefebvre Sdu, we've been building that knowledge for over 200 years. Day in, day out. Law by law. Word by word. As the Dutch heart of Lefebvre Group, the European leader in legal and tax knowledge, we're also developing our own platform: GenIA-L, where lawyers and tax advisors don't just get an answer, but an answer they're willing to attach their name to. More than 75,000 professionals use it daily, generating over 100 million euros in ARR across Europe. We're looking for a Medior Backend Developer to help build that. HOW YOU'LL MOVE US FORWARD Lawyers and tax advisors ask a question in GenIA-L and get a reliable answer. That answer is what they see. What you build is everything needed to make it happen: the backend. These are the systems and connections that keep our AI product fast, secure and reliable. You join the AI team and work with our AI engineers every day. They make the product smart; you make sure that intelligence actually reaches the user. After six months, you know the code well and have shipped several new features. After that, you choose the direction you want to grow in: more towards AI, for example by improving the quality of our AI answers, or more towards DevOps, for example by improving how we automatically test and release software. You build and maintain the backend of our main AI product, together with our AI engineers. You build APIs and services: the connections that let the different parts