About Miguel Ángel
Backend developer based in Madrid, specialising in Java and Spring Boot. I build and maintain enterprise applications using microservices architecture, event-driven communication with Apache Kafka, and relational databases like PostgreSQL and Oracle.
What I can help you with:
- Backend development: REST APIs, microservices, integrations, bug fixing, migrations and maintenance with Java 21 and Spring Boot 3.
- Event-driven systems: Kafka-based communication between services, idempotency, Dead Letter Queues and message reliability patterns.
- Database work: Schema design, query optimisation, data migrations with PostgreSQL, Oracle, JPA/Hibernate.
- Infrastructure & deployment: Docker, CI/CD pipelines with Jenkins and GitLab CI/CD, cloud services with AWS.
- Code quality: Unit and integration testing with JUnit 5, Mockito and Testcontainers. Static analysis with SonarQube.
Before moving into development, I spent several years managing teams and strategies in digital marketing, which gave me a solid understanding of deadlines, client communication and results-driven work.
Available for part-time projects, remote and async-friendly.
Portfolio: GitHub:
Spanish
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- EXDESISBackend Java DeveloperTECHAugust 2024 - Today (1 year and 10 months)Madrid, SpainEnterprise application development using microservices architecture with Java/Spring Boot, ensuring scalability and maintainability, working with Kafka for event-driven communication.- Working across multiple Java versions (7, 8, 11, 21) including version control and migration- Building and maintaining REST APIs and web services- Database management and maintenance with DB2 and Oracle- Deployment automation through CI/CD pipelines (Jenkins, GitLab CI/CD, Docker) across integration and pre-production environments- Applying quality best practices with unit testing, integration testing and static analysis (JUnit, Mockito, SonarQube)- Working in Agile environments (Scrum/Kanban)
- FreelanceBackend Java Developer - SpringTECHJanuary 2023 - August 2024 (1 year and 7 months)Madrid, Spain- Application Development: Maintaining and building applications using Java, Spring Boot and Hibernate- Microservices: Implementing microservices to improve application scalability and maintainability- Databases: Database management and design using SQL and JPA- Version Control: Using GitHub for version control and project collaboration- Containerisation: Using Docker to create consistent and deployable development environments- Object-Oriented Programming: Applying OOP principles in software design and development- Collaboration: Participating in developer communities and contributing to open-source projects
- Making ScienceProject Manager - SEOSOCIAL NETWORKSNovember 2019 - December 2022 (3 years and 1 month)Madrid, SpainManaged organic growth strategies for multiple clients across different agencies, coordinating cross-functional teams and delivering data-driven results. Responsibilities included technical SEO audits, site architecture planning, keyword research, link building strategies, content planning and performance reporting. Led and coordinated editorial and technical teams to ensure consistent execution and sustainable organic growth.
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Education
- Higher Vocational Degree in Cross-Platform Application DevelopmentCámara de Madrid2017Two-year program focused on software development fundamentals: Java, object-oriented programming, database design with SQL, web development, mobile application development, and software testing. Includes training in system deployment, version control and cross-platform development practices.