Senior Software Engineer Python
On-site
Full Time
#Product
#Python
#PostgreSQL
#fastAPI
#Git
#Pytest
#Observability
#Security
#Technical Writing
The opportunity
“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.
That's why we are hiring a Senior Software Engineer - Python.
The role
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.
What you’ll build
Architectural Design
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
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
Who you are
Essential Experience
Expert-level modern Python programming with mastery of type annotations
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
Why this role matters
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.
What we offer
Impact: Your code will power the core systems used by Europe’s most critical enterprises.
Challenge: Solve complex problems with elegant, simple solutions
Leadership: Set the standards for Python engineering and mentor the team
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
Ready to build it right?
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.
Join us in building Python systems that are powerful in their simplicity and bulletproof in their execution.
