Job Summary: We are seeking a Backend Technical Leader (Node.js) to lead the design and technical evolution of solutions, participating in architectural decisions and team management. Key Highlights: 1. Technically lead backend application development in Node.js 2. Design and evolve software architecture 3. Guide and support the development team Backend Technical Leader (Node.js) At CAS Training, a leading company with over 20 years of experience in technology consulting, outsourcing, and specialized training, we are looking to hire a professional to lead the design and technical evolution of our solutions, actively participating in architectural decision-making and technical team management. Minimum Requirements * Minimum 6 years of experience working with Node.js and TypeScript / JavaScript. * Solid knowledge of software architecture and theoretical foundations of programming languages (beyond syntax). * Ability to explain algorithms and technical concepts using clear and simple examples. * Experience working with AWS. * Fluent English (minimum B2 level). **Desirable Requirements:** * Experience with DynamoDB. * Knowledge of Angular. * Experience in: TDD (Test-Driven Development) // DDD (Domain-Driven Design) // API First / Swagger First **Responsibilities:** * Technically lead backend application development in Node.js, ensuring best practices, code quality, and scalability. * Design and evolve software architecture, participating in key technical decisions for the project. * Guide and support the development team by conducting code reviews, providing technical mentoring, and assisting in resolving complex problems. * Collaborate with other teams (product, frontend, DevOps) to define technical solutions aligned with business objectives. **Offer:** * Join a dynamic and highly qualified team within a rapidly expanding company. * Participate in innovative and cutting-edge projects for top-tier clients across various market sectors. * Long-term projects, professional stability, and career progression. * Permanent contract. * Free access to CAS Training’s annual training catalog. * Negotiable salary based on candidate’s experience and qualifications. **Work Modality:** Hybrid in Barcelona NodeJS, TypeScript, AWS