Senior Software Engineer - Python

As our Software Engineer specialized in Python, you'll be the architect of our core platform infrastructure. You'll write modern, fully type-annotated Python that sets the standard for the team, design elegant abstractions, and build robust systems that define how we deliver software., * Design modern RESTful APIs following OpenAPI specifications and best practices

• Define data models that capture business logic while remaining flexible
• Build foundational components that other engineers will build upon
• Design data connectors that reliably integrate with enterprise systems

Engineering Excellence

• Design clean abstractions that make complex systems simple to use
• Create interfaces that elegantly separate concerns and enable modularity
• Architect systems with minimal dependencies and maximum maintainability
• Design modern RESTful APIs following OpenAPI specifications and best practices
• Define data models that capture business logic while remaining flexible
• Build foundational components that other engineers will build upon
• Design data connectors that reliably integrate with enterprise systems

Robust Backend Systems

• Build RESTful APIs that are intuitive, well-documented, and performant
• Create systems with deep observability built in from the ground up
• Build authentication and authorization systems
• Implement robust data validation and processing layers
• Develop the core libraries that standardize how we build features
• Build security into every layer of the application, * Expert-level modern Python programming with mastery of type annotations

Do you have experience in Typing?, Do you have a Master's degree?, * Proven experience building production systems that work at scale

• Strong architectural skills with ability to design simple solutions to complex problems
• Track record of building maintainable systems that others want to work with
• Experience setting technical standards and leading by example

Skills That Matter

• Modern Python expertise (typing, async/await, uv, ruff, Python 3.12+)
• PostgreSQL and relational database design
• FastAPI and RESTful API design
• Monorepo toolchains (e.g., moon, pants, or bazel)
• Git and collaborative development workflows
• Comprehensive testing with pytest (unit, integration, end-to-end)
• Monitoring and observability tools
• Security best practices
• Documentation and technical writing
• Fluency in English, any other languages is a plus

Mindset & Approach

• Preference for proven technology that works
• Focus on simplicity and minimizing dependencies
• Obsession with robustness and operational excellence
• Clear communication of complex concepts to diverse stakeholders
• Passion for craftsmanship and doing things right
• Ability to balance pragmatism with technical excellence, If you're passionate about modern Python, believe in building robust systems with proven technologies, and want to set the engineering standard for a growing team, we want to hear from you.

• Growth: Take on increasing ownership in a fast-evolving platform
• Collaboration: Work closely together with our Brussels team
• Compensation: Competitive salary with performance bonus and equity
• Benefits: Comprehensive health insurance, group insurance, meal/eco vouchers, full transportation coverage, internet allowance, and additional Superlinear holidays.
• Tools: MacBook Pro, cloud compute resources, and optimization solver licenses
• Team: Collaborate with brilliant minds in AI

"Artificial Intelligence has shifted from prediction to practice, ushering in the autonomous enterprise-where systems of intelligence drive operations, not just support them." For the past eight years, we've been supporting some of the most iconic enterprises to embrace the potential of AI. Building on our experience and proven impact, we are now more committed than ever to our vision: creating a world of possibility through Superlinear productivity gains. The next step is clear: we are broadening our horizon throughout Europe, supporting the world's most critical enterprises in their transformation. To realize this ambitious vision, we're seeking sharp minds and steady hands: people who care deeply, are mission-driven, build boldly, and own the outcome., You'll be defining how we write Python and setting the technical foundation for our platform. Your architectural decisions will impact every feature we build and every integration we create. You're not just writing code-you're establishing the engineering culture and standards that will scale with our team. This is a role for someone who cares deeply about modern Python craftsmanship, who believes that good architecture makes everything else possible, and who wants to build systems that are a joy to operate and extend.