Task: – Develop and maintain RESTful APIs and internal backend tools. – You will contribute to the scalability and architecture of our platform, collaborating closely with the frontend team to implement complete solutions. – You will improve code quality through testing, refactoring, and best practices, and participate in the definition and implementation of new functionalities. – You will also support the adoption of new tools, technologies, and DevOps approaches, working within an Agile/Scrum methodology with 2-week sprints. About You: – You have 4 to 5 years of experience in backend development with excellent proficiency in the Python and Django stack. – Experience with Docker and containerized environments is required, along with knowledge of Git (GitHub, GitHub Actions, etc.). – You have experience in writing Unit and Integration Tests, and familiarity with CI/CD approaches and deploy automation. – You have good knowledge of relational databases (PostgreSQL). – You have experience with AWS services (EKS, ECS, Fargate, Lambda). – Experience in startups, high-growth contexts, or previous work on marketplaces/e-commerce, and the use of tools like Jira for task management, are considered a plus. About Us: Cosmico connects talents from the Tech and Digital ecosystem with professional opportunities and experiences that foster growth and talent enhancement through sharing, professional challenges, co-living, and co-learning. We are a startup and a community of talents across Coding (web and mobile development), Design (User Experience and Interface, Graphic and Motion Design), Marketing (Copywriting, Social Media Marketing, Art Direction), and Strategy & Data (PM/PMO, Data Expert). We collaborate with leading consulting firms, large digital agencies, multinational companies, startups, and scale-ups. For our client, a rapidly growing managed B2B marketplace connecting chefs and agri-food producers, we are seeking a Freelance Backend Developer to join their 8-person Product Team. Duration: 3 months, with a strong possibility of renewal. The effort can be full-time, but a part-time commitment of at least 3 days per week will also be considered.