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# Backend Developer Python - Startup SaaS

- **Company:** Número De
- **Location:** Barcelona, Spain
- **Salary:** €40,000.0 - €45,000.0
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Microsoft Azure, Software as a Service, Cursor, DevOps, Python (Programming Language), PostgreSQL, MongoDB, NoSQL, Angular 2+, Microsoft Copilot, Software Engineering, Large Language Models, Backend, Fastapi, AngularJS, Front End Software Development, Docker
- **Published:** October 2, 2026
- **Apply:** https://www.adzuna.es/details/5906098920

## About the Role

1. 5+ years of solid experience developing backend in Python, ideally with FastAPI
 2. Real mastery of relational and NoSQL databases (PostgreSQL and MongoDB), beyond basic level
 3. Understanding of designing and using complex datamodels and experience in designing and architecting modular, scalable, and maintainable backend systems
 4. Positive consideration for experience in DevOps and Angular
 5. Experience working in professional development teams (3+ people) and long-term projects, with real responsibility over what you build
 6. Demonstrable autonomy: ability to unblock yourself, make technical decisions, and progress without constant validation
 7. Native Spanish speaker
 8. English level B2 to read technical documentation
 9. Positive consideration for experience with Docker, Azure, Angular, or IA/LLM integration, though not mandatory initially

## Description

* Lead backend development projects technically and independently.
 * Contribute to the growth of the SaaS platform, Food Radar.
 * Become a key execution pillar within the development team.
 * Absorb knowledge of the existing architecture and work autonomously on complex developments.
 * Provide technical judgment and decision-making from the early stages.
 * Build software, solve technical problems, and deliver developments responsibly from start to finish.

Tools & Environment

 * Backend development in Python using FastAPI as the main framework.
 * Databases: PostgreSQL and MongoDB.
 * Infrastructure based on Docker and Azure.
 * Frontend developed in Angular.
 * Integration of AI/LLM APIs within the platform.
 * Regular use of AI tools for development such as Cursor and Copilot.