Full-Stack AI Engineer (Java/Spring Boot + Angular)

Full-Stack AI Engineer (Java/Spring Boot + Angular)

Build AI that runs in production, not in a demo. Join our dev team to rebuild a busy ERP in Java 21 and Spring Boot, and to put AI into both the platform and the way we work. Remote, hybrid or in Vilvoorde.

At The Hive, we build the ERP behind budget proposals, workforce planning and contract management for a group of event and brand activation companies. Hundreds of people rely on it every day. We’re rebuilding its Symfony core in Java 21 and Spring Boot, service by service, while building AI into the platform itself. You’ll work on both. You’ll also have a real say in which technologies we adopt, how we use them, and where AI earns its place.

THE ROLE AT A GLANCE

• Permanent, full-time position (employee contract, not freelance)
• Remote, hybrid or at our office in Vilvoorde, Belgium. Your call.
• Competitive salary + meal vouchers, eco-vouchers and hospitalisation insurance
• Working language: English

WHY THIS ROLE IS DIFFERENT

• You ship real AI features to real users, built on real company data with real security constraints.
• You help decide what we adopt and how we work. You’re not just picking up tickets.
• It’s a modern rebuild: Java 21, Spring Boot and tests as a hard gate in CI/CD, extracted one domain at a time.
• We run on our own Linux servers, so you understand the whole system, from code to infrastructure.

YOUR FIRST 6 MONTHS

• Ship features end to end, from Spring Boot services to Angular frontends.
• Own a slice of the migration: extract a domain from the Symfony monolith into a production Spring Boot service, running alongside the old code.
• Ship your first AI feature to production. That could be an assistant that answers questions from our event documents, or tools that let AI query our platform data safely.
• Help shape how AI fits into our development workflow, from ticket to review to deploy, and how we work as a team because of it.

DAY TO DAY

• Build across the stack: Spring Boot, Angular, and occasionally our React Native (Expo) mobile apps
• Keep the migration moving and support the Symfony backend while it runs
• Build AI features: retrieval over our documents, MCP integrations, and workflow automation our clients can set up themselves
• Evaluate new AI tools and help decide what we adopt and what we don’t
• Make sure AI touches our data securely, with access control, data masking and clear limits on what a model can see

OUR STACK

• Java 21, Spring Boot
• Angular, TypeScript
• PHP / Symfony (the monolith we’re replacing)
• React Native (Expo)
• PostgreSQL, Redis, RabbitMQ
• LLM APIs, MCP, RAG, workflow automation
• Docker, GitLab CI/CD, self-hosted Linux servers

WHAT YOU BRING

• 3+ years of professional full-stack development
• Strong hands-on Java and Spring Boot
• Strong hands-on Angular and TypeScript
• You’ve built something with LLMs, or you’re clearly driven to. That means something that calls a model, retrieves context or uses tools, not just a chat window.
• Solid relational database experience, ideally PostgreSQL
• Comfortable with Docker, Git and CI/CD
• Willing to read and work in PHP/Symfony during the transition
• Good judgment about AI: you know when it’s the right tool and when it isn’t, and you own and review the code it helps you write

NICE TO HAVE

• Embeddings or vector search (e.g. pgvector)
• MCP or agent tooling
• Migrating or decomposing a monolith
• React Native
• Running services on your own servers rather than a managed cloud

WHAT WE OFFER

• Real impact on architecture, technical direction and how we work with AI
• A competitive salary plus meal vouchers, eco-vouchers and hospitalisation insurance
• Flexible hours, and remote, hybrid or office work
• A team that values focus and a sustainable pace over crunch

HOW TO APPLY

No cover letter needed. Hit apply and, if you have one, add a GitHub link or something AI you’ve built. The first conversation is always online and informal. Questions first? Send us a message and we’ll reply personally.

The Hive tech team