Senior Backend Developer (Python/Django)

Apply🌍 Senior Backend Developer (Python/Django)Location: From AarhusEmployment: Full-time🚀 About WasteHeroAt WasteHero, we’re revolutionizing municipal waste management through cutting-edge software. Our cloud-native SaaS platform helps cities and private operators optimize routes, automate billing, ensure compliance, and build greener communities.We’re already working with municipalities and waste companies across Europe — including one of the largest public-sector transformation projects all of Europe — and we’re just getting started.WasteHero is a mission-driven scaleup with strong product-market fit, backed by institutional investors and public contracts. Our HQ is in Aarhus, Denmark, where product and engineeringsit at the heart of the business.🎯 The Role: Senior Backend DeveloperWe’re looking for a senior backend engineer who will strengthen our distributed engineering team and help deliver mission-critical features in the coming 12–18 months.As Senior Backend Developer, you will:Build and maintain Python/Django + FastAPI services powering our SaaS ERP platformDesign and implement scalable REST & GraphQL APIs for integrations with municipal ERP systemsDevelop ETL pipelines and migration scripts (Python/SQL) to handle complex datasets from multiple sourcesEnsure system reliability, security, and GDPR/NIS2 compliance through robust logging, rollback, and error handlingCollaborate daily with colleagues in Aarhus HQ and Finland, UK, Germany, working in an agile delivery setupContribute to architectural decisions for performance, fault-tolerance, and long-term maintainability🛠 Our Tech StackPython 3, Django, FastAPIPostgreSQL, Redis, CeleryGraphQL (Graphene), REST APIsDocker, gunicornBitbucket Pipelines (CI/CD)Hosted on Hetzner with private networking & load balancing✅ You Bring5+ years of backend development experience (Python/Django preferred)Strong experience with relational databases (PostgreSQL/SQL)Track record of building production APIs and backend services at scaleExperience with ETL, migrations, or integration-heavy environmentsFamiliarity with Docker, CI/CD, and modern development pipelinesExcellent English communication skills (Polish native a plus)Bonus: FastAPI, GraphQL, SaaS platform background, or public-sector software🌟 Why Join WasteHero?High-impact role: Your work directly supports public-sector digitalisation across EuropeOwnership: Work on complex, integration-heavy challenges with real autonomyGrowth: Be part of a fast-scaling SaaS company with ARR-focused expansion in the NordicsUpside: Competitive salary + stock optionsCulture: International, mission-driven team with a focus on clarity, fairness, and executionPurpose: Real-world environmental impact at scaleApply