Acerca de David
Senior Software Engineer with 20+ years of experience in backend development on the JVM, specialized in Java/Spring, reactive systems and microservices, with strong focus on SOLID design, refactoring legacy platforms and performance. You have worked across banking, retail, energy, travel, education and public sector projects, designing and implementing greenfield architectures, improving existing systems and leading POCs, always applying TDD, clean code and cloud‑native best practices. I'm also active in AI and developer productivity tooling, building my own POCs with Python, Langchain, CrewAI and Ollama, and frequently mentoring teams, reviewing code and introducing modern practices in CI/CD, observability and documentation.
Español
Bilingüe o nativo
Inglés
Competencia profesional completa
Francés
Competencia profesional básica
Solo teletrabajo
Lleva a cabo sus proyectos principalmente en remoto
Experiencia
- ApiumhubSenior Software Engineerfebrero de 2021 - marzo de 2023 (2 años y 1 mes)Barcelona, SpainHotel booking management project: distributed micro-monolith system for booking purposes. All backend projects were proxies between SAP/CMS servers & web/apps clients. Code reviewer, mentoring and a lot of refactoring legacy code towards functional, KISS, SOLID, and YAGNI. Methodologies & architectures: MVC, Hexagonal, TDD, DDD, Scrum, Jira, CI/CD, GitLab, Docker.• - Java: Maven, Spring, Java11 , Redis• - Clojure: Lein, Clojure, Elasticsearch, Mysql, Redis.
- Energy ToolsSenior Software Engineerabril de 2020 - enero de 2021 (9 meses)Terrassa, CT, SpainMaven/Java/Spring/MVC/REST-API/Mongo, Angular2, Gitlab, Scrum.Refactoring java legacy code: removing technical debt & bad practices, applying SOLID/MVC, etc. (decoupling layers & components, abstraction, complexity, generics, complex hierarchy…).Tomcat memory leak fixing (closing resources, better implementation for Garbage Collector, etc).Sonar+TDD architecture set up (unit & parallel integration testing: selenium, junit5, mockito).Complete cache impl. refactor/fix with tomcat parallel deployment (created Infinispan GitHub issue).AWS S3 resilient implementation for different environments (dev, staging, production).CI/CD: Gitlab workflow improvements (MR, pipes, releases) & release automation via bash vs GitLab API.Readme’s & Wiki: created (inexistent/obsolete) technical documentation.Issue fixing, new functionality implementation, UX improvements.
- ASM Web ServicesSenior Software Engineerabril de 2018 - septiembre de 2019 (1 año y 5 meses)Viladecans, CT, Spain1 . Scala projects: dynamic-pricing-platform project (sbt, jquery/ui, play, scala, akka actors, mssql, redis)• - Integration tests architecture, development & dockerization (JUnit, Selenium, Scala).• - Project refactor removing: complexity, layers/libs coupling, duplicated code (Scala, ScalaStyle, Sonar, good practices).• - POC serialization with Avro, ProtocolBuffers, ...Transversally to projects & technologies: application of SOLID principles with refactorings, mentoring for junior roles, creating inexistent documentation (GitLab wiki & readme's).
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Formación
- FPII Informática de Gestión (Vocational Training II- Information technologies). Formación Ocupacional MicroelectrónicaFPII Informática de Gestión (Vocational Training II- Information technologies). Formación Ocupacional Microelectrónica
- Curso UML(Centro de formación BIT2000Curso UML