AI Engineer
Brussels · On-Site
SaaS Startup
We are working with a fast-growing SaaS startup transforming the legal domain with modern technology—They're looking for an AI Engineer who wants to build, own, and shape core product systems from the ground up.
This is a role where you can have real ownership and impact on a product that is revolutionising the legal and finance industry within a company that is growing at an incredible pace.
With expansion plans into wider Europe and the US, the Sky really is the limit with your own career growth.
What you'll be doing
* Designing, building, and scaling core features of their SaaS platform
* Build production-ready LLM agents with multi-step reasoning and tool use
* Design and implement agentic workflows using Pydantic AI
* Integrate LLMs (Claude, Gemini, OpenAI) into customer-facing features
* Building robust backend services and APIs with Python & FastAPI
What They're looking for
* Strong experience as an AI Engineer or in a similar role working with AI agents
* Solid backend experience with Python, ideally FastAPI
* A product mindset: you care about users, not just code
* Comfortable taking ownership, making decisions, and moving fast
* Based near (or willing to relocate to) Brussels
Bonus points if you have experience with
* Working professionally in a SAAS Start-up environment
* Building quickly and having great ownership
Why join Them?
* High ownership & autonomy – your work will directly shape the product and company
* Real impact – we're solving meaningful problems in the legal and financial domains
* Modern tech stack with room to influence architectural decisions
* Ambitious, smart team that values pragmatism, quality, and speed
* Up to €5k gross - Dependent on ability and experience
* Mobility Budget
* Meal Vouchers
* Equity Options
* Hospitalisation Insurance
If you're an ambitious engineer who wants to build something that matters—and doesn't want to be boxed into a narrow role—we'd love to hear from you!