Freelancer profile translated to English.
Back to original languageAbout Jefferson Paul
I am a senior backend developer with over 8 years of experience specializing in Java and microservices architectures.
I have worked on enterprise applications used by thousands of users, where performance, stability, and scalability are key. My focus is on developing robust, clean, and business-oriented solutions.
🔧 Main Technologies
Java (8–11)
Microservices (JAX-RS)
REST APIs
JPA / Hibernate (Criteria API)
Angular + TypeScript (PrimeNG)
Docker
Oracle / MySQL
🚀 What I can do for your project
Development of scalable and well-structured REST APIs
Design and evolution of backend architectures
Performance optimization in databases
Maintenance and improvement of existing systems
Integration between services and external systems
I have worked on systems with a high volume of users, so I am accustomed to demanding environments and solving real business problems.
I work clearly, efficiently, and results-oriented.
Spanish
Native or bilingual
Catalan
Fluent
English
Conversational
Remote only
Primarily works remotely
Experience
- Setting ConsultoriaSenior Backend Developer | Java | Microservices | AngularFebruary 2017 - Today (9 years and 4 months)Barcelona, SpainBackend development with 11 years of experience in highly complex enterprise applications.• Frontend development with Angular + TypeScript (PrimeNG).• Design and implementation of microservices architectures (REST) with JAX-RS.• Advanced persistence with JPA (Criteria API).• Containerization of applications with Docker.• Participation in collaborative environments with continuous integration (CI/CD) and best development practices.• Report generation with JasperSoft.• Active participation in technical analysis and decision-making.• Hybrid profile with the ability to work on backend and frontend.
- SIGMA, helping universities succeedSoftware DeveloperOctober 2016 - February 2017 (4 months)Sant Cugat del Vallès, CT, SpainRecommended description• Participation in the development and maintenance of web applications.• Support in backend and frontend development tasks.• Working with technologies such as Java, SQL, and JavaScript.• Collaboration with the team in resolving incidents and system improvements.• Learning best development and teamwork practices.
- El TriunfoAdministrative AssistantJanuary 2009 - January 2011 (2 years)• Prepare invoices with Excel.• Process customer payments.• Maintain company equipment.
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Education
- CFGS Desarrollo de aplicaciones web, Desarrollo de aplicaciones webEscola del treball2017CFGS Desarrollo de aplicaciones web, Desarrollo de aplicaciones web
- Seguridad de Sistemas de la Información, Seguridad informática y de sistemasAula Activa, formació i serveis2015Seguridad de Sistemas de la Información, Seguridad informática y de sistemas