The opportunity Enterprise productivity across Europe is under pressure. As complexity increases through geopolitical shifts, labour constraints, and tighter operational interdependencies, many organisations observe that AI and optimization efforts improve local efficiency but fail to deliver structural, enterprise-level gains.At Superlinear, we address this gap through enterprise orchestration: enabling better system-level decision-making across people, processes, and machines in environments where siloed optimization no longer works.In our earliest pilots with leading European enterprises, weve seen that moving from local optimization to coordinated, enterprise-wide decisions can unlock significant latent capacity. Productivity gains in the range of 1030% are achievable by reducing systemic friction rather than adding infrastructure.The 500 largest European enterprises represent roughly 14 trillion in economic output. Enabling even a fraction of them to structurally improve productivity would have impact beyond individual companies.This is a long-term effort that requires rigor, restraint, and people who care deeply about their craft, take responsibility for outcomes, and are comfortable working on complex, high-stakes systems. This role offers the opportunity to contribute meaningfully to the foundations of enterprise orchestration in Europes most critical organisations.That's why we are hiring a Senior Software Engineer - Python.The roleAs 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 Youll BuildArchitectural DesignDesign clean abstractions that make complex systems simple to useCreate interfaces that elegantly separate concerns and enable modularityArchitect systems with minimal dependencies and maximum maintainabilityDesign modern RESTful APIs following OpenAPI specifications and best practicesDefine data models that capture business logic while remaining flexibleBuild foundational components that other engineers will build uponDesign data connectors that reliably integrate with enterprise systemsEngineering ExcellenceMentor team members through code reviews and architectural discussionsSet the standard for modern Python code quality across the engineering teamEstablish architectural patterns and best practices for the entire codebaseDesign and implement comprehensive testing strategiesCreate exemplary documentation that serves as a learning resourceBuild monitoring and observability that provides real operational insightRobust Backend SystemsBuild RESTful APIs that are intuitive, well-documented, and performantCreate systems with deep observability built in from the ground upBuild authentication and authorization systemsImplement robust data validation and processing layersDevelop the core libraries that standardize how we build featuresBuild security into every layer of the applicationWho You AreEssential ExperienceExpert-level modern Python programming with mastery of type annotationsProven experience building production systems that work at scaleStrong architectural skills with ability to design simple solutions to complex problemsTrack record of building maintainable systems that others want to work withExperience setting technical standards and leading by exampleSkills That MatterModern Python expertise (typing, async/await, uv, ruff, Python 3.12+)PostgreSQL and relational database designFastAPI and RESTful API designMonorepo toolchains (e.g., moon, pants, or bazel)Git and collaborative development workflowsComprehensive testing with pytest (unit, integration, end-to-end)Monitoring and observability toolsSecurity best practicesDocumentation and technical writingFluency in English, any other languages is a plusMindset & ApproachPreference for proven technology that worksFocus on simplicity and minimizing dependenciesObsession with robustness and operational excellenceClear communication of complex concepts to diverse stakeholdersPassion for craftsmanship and doing things rightAbility to balance pragmatism with technical excellenceWhy this role mattersYou'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 codeyou'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 OfferImpact: Your code will power the core systems used by Europes most critical enterprises.Challenge: Solve complex problems with elegant, simple solutionsLeadership: Set the standards for Python engineering and mentor the teamGrowth: Take on increasing ownership in a fast-evolving platformCollaboration: Work closely together with our Brussels teamCompensation: Competitive salary with performance bonus and equityBenefits: 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 licensesTeam: Collaborate with brilliant minds in AIReady 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.