Freelancer profile translated to English.
Back to original languageAbout Raúl
Backend developer specialized in Node.js.
I help companies build, improve, and maintain APIs and backend systems, especially when they need to integrate services, process data, or scale existing applications.
I have experience working with REST APIs, MySQL databases, and event systems (Azure Event Hub), optimizing performance and adapting code to new business needs.
Services:
• API Development with Node.js (Express / NestJS)
• System Integration (APIs, events, queues)
• Performance Optimization and SQL Query Optimization
• Maintenance and Improvement of Existing Backends
Stack:
Node.js · NestJS · Express · MySQL · Azure Event Hub · Git
Spanish
Native or bilingual
English
Conversational
Can work on-site
Madrid (up to 50km)
Experience
- Ahorramas S.ASoftware ArchitectFebruary 2023 - Today (3 years and 4 months)Madrid, Spain• • Designed and own the architecture of a company-wide Storage Management System used across 8+ departments and 200+ daily internal users• • Built custom CLI tooling that automated repetitive dev workflows, reducing deployment setup time by ~40% across 5+ engineering teams• • Lead all architectural decisions for new product initiatives, owning scalability, maintainability, and performance trade-offs• • Provide technical leadership to cross-functional teams, establishing standards for code quality, testing, and CI/CD adoptionTechnologies: Node.js, Docker, Angular, Kubernetes, Microservices, CI/CD, System Architecture
- FacePhiBackend DeveloperAugust 2022 - January 2023 (5 months)• • Developed internal services using Node.js and NestJS, consumed by client-facing biometric authentication products• • Built responsive frontend interfaces with React; maintained automated test coverage with Jest in a Docker-based CI pipeline• • Contributed to microservices architecture design alongside cross-functional teamsTechnologies: Node.js, NestJS, React, Docker, Jest, CI/CD
- True IT SystemsSoftware DeveloperJanuary 2022 - August 2022 (7 months)• • Delivered full-stack web applications in JavaScript; designed and optimized MySQL schemas, stored procedures, and complex queries• • Improved application performance through UI refactoring and query optimizationTechnologies: JavaScript, HTML5, CSS3, MySQL
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Education
- Full Stack DeveloperBootcamp2021Full Stack Developer
- Associate Degree in 3D Animation, Game Design & Interactive Environments2021Associate Degree in 3D Animation, Game Design & Interactive Environments