Senior Software Engineer

pBuild the engine that turns a pile of shipping documents into a correct customs declaration, and own it in production. /p pbGlobal trade runs on paperwork. We're replacing it with intelligence. /b /p pbCustomaite is the trusted AI-platform for customs automation. Customs brokers, freight forwarders and logistics leaders use our self-learning platform to clear goods faster, smarter and safer: fewer errors, lower costs, audit-ready compliance, ROI in months. With strong product-market fit and rapid growth across Europe, we're now looking for a Senior Software Engineer who builds that power, and owns it once it's live. /b /p h3The role: builder and owner /h3 pbYou'll own a slice of the platform end-to-end. One week you're designing how a new LLM extraction step should behave when the model is wrong; the next you're reading a Datadog trace to find out why a declaration got stuck, and fixing the root cause. You'll work closely with product, customer success and the rest of engineering. Build it, run it, improve it; and then again. /b /p pbOur stack: /bJava 25 and Spring Boot/Quarkus, Postgres, RabbitMQ, Elasticsearch, Redis, Auth0, Temporal. Python with pydantic-ai for the LLM and ML services. Vue 3 and TypeScript on the front-end. Helm on Azure AKS. Datadog and PagerDuty to keep us honest. /p pbWhat it’s really like: /ba small team runs dozens of services with real customer traffic. You'll be on-call in rotation and take your turn as release owner. Some code predates you and isn't pretty. We run Java 25 with preview features and it occasionally bites. If you want a platform team between you and production, this isn't it. If you want to see your decisions land with customers the same week, it is. /p h3What you'll do /h3 ul libOwn parts of the domain: /bTake a slice of the declaration flow end-to-end: design, build, ship, run, improve. /li libBuild with AI, and for it: /bShip LLM-powered features (extraction, classification, agents) with evals, cost and latency as first-class concerns, and design what happens when the model is wrong. /li libKeep it running: /bOn-call in rotation, release owner in turn, Datadog as your dashboard, post-mortems that fix root causes. /li libShape the architecture: /bDozens of services on Java 25; refactor deliberately, call out debt explicitly, write decisions down. /li libWork agentically: /bClaude Code or similar is part of the daily toolkit; you raise the bar for how the team uses it. /li libRaise the team: /bReviews, pairing, mentoring, technical interviews. /li /ul h3Who you are /h3 h3Must-haves /h3 ul li5+ years building and running backend systems on the JVM (Java with Spring Boot or Quarkus). /li liYou've shipped LLM-powered features to production: structured output, tool calling, evals, cost and latency control. /li liComfortable owning services in production: on-call, debugging across services, observability. /li liSolid with Postgres and message-driven architectures (RabbitMQ or similar). /li liYou use agentic coding tools daily and can show what you build with them. /li liAble to work from our Leuven office three days a week. /li /ul h3Nice-to-haves /h3 ul liPython for ML and LLM services (we use pydantic-ai and Celery). /li liKubernetes and Azure (we run on AKS with Helm). /li liVue 3 and TypeScript on the front-end. /li liElasticsearch, Redis, Auth0. /li liExperience in a scaling startup or product company. /li liDutch, and a curiosity for logistics and customs. /li liA small team of highly skilled, motivated people pulling toward one goal, with no layers between you and the problem. /li liReal ownership of parts of the domain, and room to grow as we scale. /li liAn AI-native product with real traffic, on a modern stack, where new tools are tried the week they come out. /li liHybrid: three days in Leuven, two wherever you work best. /li liCompetitive salary, company car and performance-based bonus plan. /li /ul h3What

we offer
/h3 h3Ready to change how global trade moves? /h3