Senior Software EngineerBrussels · On-siteSaaS Startup
We are working with a fast-growing SaaS startup transforming the legal domain with modern technology—and we're looking for a Senior Software Engineer who wants to build, own, and shape core product systems from the ground up.
This is not a maintenance role. You'll have real influence over architecture, product decisions, and technical direction, working closely with founders and product leadership in a high-trust, high-impact environment.
What you'll be doingDesigning, building, and scaling core features of their SaaS platformDeveloping the frontend using React & TypeScriptBuilding robust backend services and APIs with Python & FastAPITaking ownership of systems end-to-end: design, implementation, testing, deployment, and monitoringHelping define engineering best practices and technical strategy as the company growsSetting up Devops and CI/CD pipelines
What They're looking forStrong experience as a Senior Software Engineer in a product-driven environmentDeep knowledge of React and TypeScript on the frontendSolid backend experience with Python, ideally FastAPIA product mindset: you care about users, not just codeComfortable taking ownership, making decisions, and moving fastBased near (or willing to relocate to) Brussels
Bonus points if you have experience withDevOps & cloud infrastructureKubernetes and TerraformCloud platforms (AWS, GCP, or Azure)Designing scalable, production-grade systems in a SaaS environment
Why join Them?High ownership & autonomy – your work will directly shape the product and companyReal impact – we're solving meaningful problems in the legal domainModern tech stack with room to influence architectural decisionsAmbitious, smart team that values pragmatism, quality, and speedUp to €6.5k gross - Dependent on ability and experienceCompany car and fuel cardMeal VouchersEquity OptionsHospitalisation 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.