Node.js Back-End Engineer

Role: Node.js Backend Engineer Location: Madrid, Spain (Remote - Must live in Spain) - 1 day per month Skills: Node.js, TDD, DDD & CI/CD Languages Required: Spanish (native/high level) & English (Professional) About the Role We're looking for a Node.js Backend Engineer who thrives in collaborative environments and is passionate about building scalable, secure, and high-quality backend systems. Join our dynamic, product-oriented teams, where autonomy and ownership drive innovation. What You'll Do Functional Collaboration Work closely with QA and Product Owners (3 Amigos model) at the story level Coordinate development efforts across user stories, incidents, and tasks Challenge and refine feature implementations Mentorship & Teamwork Guide junior engineers through implementation and best practices Promote Pair/Mob programming and conduct code reviews Engineering Excellence Observability: Implement and review traces, metrics, logs, and business events using tools like Dynatrace Security: Ensure secure coding practices and mentor others Deployability: Guide infrastructure as code (e.g., Terraform) Code Quality & Performance: Drive best practices in async/multi-threaded code and performance testing Scalability & Resiliency: Implement scalable, stateless services and resilient patterns (e.g., retry strategies, circuit breakers) Testing: Lead testing strategies (E2E, unit, integration, contract) using TDD Architecture & Design: Apply design patterns, OOD, and microservices architecture Skills & Experience Strong Node.js backend development experience Test Driven Development (TDD) Domain Driven Design (DDD) Object-Oriented Programming (OOP) Relational, key-value, and document databases Continuous Integration & Infrastructure as Code Bonus: Side projects, diverse tech stack knowledge, hidden talents What We Offer A clear career path for growth Support from Software Engineering, DevOps, Cloud Engineers, Tech Leads, and Architects Agile methodology (Scrum) A collaborative, inclusive, and supportive environment Work Culture You'll be part of a team that values autonomy, ownership, and continuous improvement. We work in cross-functional squads with a shared mission and strong support network—you'll never be alone. Ready to Join Us? If you're excited to build impactful software and grow with a passionate team, apply now or reach out directly. Let's build something great together