Senior Software Developer – Backend Node.js / TypeScript

Description

Job Summary: We are seeking a Senior Backend Software Developer (Node.js/TypeScript) for a high-impact project in healthcare data processing, focused on evolution, maintenance, and optimization of the backend. Key Highlights: 1. Be part of a technical team specialized in high-volume data processing. 2. Collaborate on technical decision-making and continuous architecture improvement. 3. A dynamic, collaborative, respectful, and inclusive environment. We are looking for a **Senior Software Developer** specializing in **Backend Node.js / TypeScript**, to join as a key technical contributor to a high-impact project focused on processing large volumes of healthcare data. The selected candidate will join a specialized technical team and assume responsibility for the evolution, maintenance, and optimization of the backend, ensuring stability, scalability, and code quality within a high-volume data environment. **What will your day-to-day look like?** * Work on flows developed in **Node\-RED**, participating in their maintenance, evolution, and optimization. * Proactively identify bottlenecks and propose improvements to data pipelines, backend processes, and database queries. * Design and implement resilient **REST APIs** and integrations with external platforms in the ecosystem. * Apply enterprise integration patterns, ensuring availability, fault tolerance, and robustness in inter-system communication. * Ensure software quality through sound development practices, unit and integration testing, structured logging, and observability metrics. * Manage and optimize container-based environments using **Docker**, guaranteeing reliable and consistent deployments across development and production environments. * Collaborate with international technical teams, participating in technical decision-making and continuous architecture improvement. **What are we looking for in you?** * **4–5 years or more** of backend development experience, especially in high-data-volume environments requiring system optimization. * Proficiency in **Node.js** and **TypeScript**, with solid knowledge of asynchronous programming and backend architecture patterns. * Practical experience with **Node\-RED**. * Strong knowledge of **PostgreSQL** and **Elasticsearch**, particularly in intensive data processing, indexing, and high-concurrency contexts. * Experience working with **REST APIs**, system integrations, and enterprise integration patterns. * Experience in containerized environments using **Docker**, both for application management and deployment. * Ability to work autonomously and identify opportunities for improvement. * Professional-level English proficiency. * Proactive, collaborative profile with a strong sense of ownership. * Team-oriented mindset, sharing knowledge and participating in code reviews. **Bonus Points** * Knowledge of **Python** and object-oriented programming. ***What can we offer you?*** * Permanent contract. * Full-time position. * Location: Valencia, hybrid model (3 days in office, 2 remote). * Competitive salary aligned with your experience. * Flexible compensation plan including private health insurance, childcare support, meal vouchers, and public transport subsidies. * As English is highly relevant, personalized English classes are also available. * Join a dynamic, collaborative, respectful, inclusive, and above all, human-centered environment. * Autonomous career development plan to accelerate your professional growth. * Professional training and mentoring to support your continued evolution. If you believe this role could be your next career step, don’t hesitate to apply! ”At 3MT Global Service, we promote equal treatment and opportunities between women and men. Our selection policy is based on objective, non-discriminatory criteria, ensuring an inclusive recruitment process, gender-neutral language, and a genuine commitment to diversity and equality.”