Sr Backend Python/Golang Developer

We are looking for Backend Developers (Python / Golang) to join Unnax’s growing engineering team in LatAm on a full\-time, long\-term basis. This role combines maintenance of existing systems with the development of new backend functionalities. You will work on backend services that power financial products in Mexico, enabling secure and scalable integrations with third\-party institutions. **Requirements:** * Strong experience in backend development * Hands\-on experience with Python and Golang * Solid knowledge of SQL and relational databases * Proven experience designing, developing, and integrating APIs * Ability to write efficient and optimized queries * Understanding of database performance, indexing, and optimization * Experience working with AWS (Lambda, S3, EC2, IAM or similar) * Familiarity with software engineering best practices, clean architecture, and design patterns * Experience working in agile environments with CI/CD * Advanced English level – mandatory * High level of proactivity and autonomy **Nice to have:** * Experience with web scraping * Experience in Open Banking / Open Finance * Knowledge of NoSQL databases * Experience with observability tools (logging, metrics, monitoring, alerts) **Responsibilities:** * Maintain and support existing backend services * Design, build, and evolve backend systems and APIs * Work on complex integrations with third\-party services * Ensure high standards of performance, reliability, and code quality * Optimize database queries and backend workflows * Collaborate with a distributed, international engineering team **Benefits:** * USD compensation * 100% remote