Senior Python Backend Engineer

**Senior Python Backend Engineer - OscarMobility**: **Who We Are**: OscarMobility is transforming how car rentals work. Instead of traditional rental fleets, we connect local car dealerships with people who need cars, helping dealers monetize idle inventory like unused loaner vehicles and slow-moving stock. Our "no cure, no pay" model means dealerships only pay when we deliver results. The model works. We have more than **50,000 users across Europe** and are now expanding into the **U.S.** The challenges ahead are big, and the opportunity to have real impact is even bigger. **The Opportunity**: We are hiring a **Senior Python Backend Engineer** to help build the foundation that supports our next stage of growth. This is a high-ownership role focused on **modernizing, refactoring, and scaling** our backend systems. You will work on new services, improved architecture, and migrations that prepare us for multi-country expansion. If you enjoy autonomy, taking initiative, and shaping real systems rather than maintaining old ones, you will thrive here. **Location**: Hybrid preferred in Malaga, Spain or Munich, Germany, remote possible within the EU **Schedule**: Full-time **Day-to-Day**: This is a role with variety and responsibility. You will work across architecture, development, performance, and integration challenges. Expect to: - Design, build, and own backend services written in Python - Lead refactoring initiatives and reachitecture work to modernize and simplify our platform - Build reliable REST APIs for our React frontend, mobile apps, and partner integrations - Create systems that support multiple countries, currencies, and languages - Improve performance, stability, and reliability in high-growth environments - Work closely with frontend, product, and technical leadership - Bring proactive ideas to the table, not just execute tickets - Own your work end to end, from concept to deployment This role requires someone who takes initiative, thinks ahead, and enjoys turning messy problems into simple, scalable solutions. **What You Need**: **Must Have**: - 5+ years building and maintaining production-grade backend services - Strong experience with Python and frameworks like FastAPI, Django, or Flask - Solid experience designing and implementing RESTful APIs - Deep understanding of SQL databases (PostgreSQL preferred) - Knowledge of microservices or modular monolith patterns - Experience with cloud platforms (AWS, GCP) and Docker - Familiarity with CI/CD practices - Strong communication skills in English - A proactive, ownership-driven approach to engineering **Nice to Have**: - Experience with reachitecture projects, migrations, or platform rewrites - Familiarity with Redis, message queues, or event-driven systems - Experience with high-scale or high-traffic platforms - Background in mobility, automotive, logistics, or marketplace products - Experience with data pipelines, metrics systems, or observability tooling - Interest in shaping technical direction and mentoring others **Our Stack**: - Python (FastAPI) - MySQL, Redis - AWS, Docker, GitHub - REST integrations - Frontend ecosystem: React, Next.js, TypeScript You will help define how this stack evolves moving forward. **Why Join Us**: **Real ownership**: This is not a ticket factory. You will shape architecture decisions, propose changes, and lead improvements. **High-impact work**: You are joining at a pivotal moment as we expand internationally and modernize the entire backend. **Greenfield and refactor blend**: Expect a mix of new service development and meaningful refactoring, with no outdated legacy systems. **Small, fast team**: You will work closely with experienced engineers and have a direct line to the CTO. **Flexibility and a competitive package**: Hybrid-friendly environment, competitive compensation, and trust-based work culture. **What's Next**: - **Apply** - Send your CV and links to relevant work or GitHub - **Intro Call** - **Technical Assessment** - **Interview with Tech Leads** - **CTO Conversation** - **Offer** If you want to work with autonomy, help shape a platform that is scaling internationally, and enjoy solving real technical challenges, we'd love to hear from you. **Send your resume and a brief note about why OscarMobility caught your attention.