Job Summary: We are seeking a Backend Senior Engineer (Node.js) to join a high-performing international team in the Insurance sector, participating in the design and scaling of critical architectures. Key Highlights: 1. Integration into a high-performing international team 2. Design and scaling of critical architectures 3. Long-term project leveraging cutting-edge technology Backend Developer NodeJS CMV Consultores is looking for a Backend Senior Engineer (Node.js) to work with one of our most important clients in the Insurance sector. You will join a high-performing international team, participating in the design and scaling of critical architectures within a stable and leading-edge environment. **Responsibilities:** Development and maintenance of robust microservices using Node.js and TypeScript. Design and implementation of scalable RESTful APIs. Optimization of data flows and management of SQL (PostgreSQL) and NoSQL databases. Ensuring software quality through Unit and Integration Testing (Jest/Mocha). Collaboration throughout the deployment lifecycle using Docker and Cloud environments (AWS). **Requirements:** **Experience:** +5 years in Backend development. In-depth expertise in Node.js (Event loop, streams, buffers) and NestJS/Express. Proficiency with Docker and knowledge of CI/CD and Terraform/AWS. English proficiency at B2/C1 level (mandatory for international environments). **Compensation and Benefits:** **Salary:** Up to €35\.000 gross/year (based on qualifications and experience). Hybrid work model (partial on-site presence in Madrid). Long-term project offering professional stability. Cutting-edge technology within the insurance industry. Ready to take your technical career to the next level? Join a team where your code will impact thousands of users within a global and dynamic environment. We’re waiting for you! node, TypeScript, Docker, AWS, SQL