01
Java, Spring Boot and microservices
Backend development, migrations and maintenance of business applications. I work with REST APIs, Kafka, security and event-driven systems when they are really needed.
Available for remote freelance work
Senior Java developer · AI integrations
Senior Java development
with experience beyond the backend.
I have spent more than 15 years building and running software. I currently work mainly with Java, Spring Boot and microservices, and I also handle AI, APIs and communications integrations when the project needs them.
●Las Palmas, Spain · Remote across Europe
Written German supported with professional translation tools · No calls or meetings in German
Java · Spring · Kafka
AI + APIsProduction integration
15+years in technology
Java 8–21enterprise backend
30microservices on a national health platform
1,000+commercial locations reached by VoIP products
What I solve
The work I usually take on
Most assignments fit into one of these three areas. The rest of the stack is there to help me finish the job, not to fill a list of technologies.
02
AI integrations and automation
Agents, n8n workflows and model APIs connected to existing tools and data. I also set up the handoff to a person when automation should stop.
03
Voice, WhatsApp and business platforms
SIP/PBX, WebRTC and WhatsApp systems connected to CRM, APIs and internal applications. This is an area I have worked in for many years.
Selected work
Some of the work I can show
Two public products you can open and test, plus one of the enterprise projects that best represents my recent Java work.
PUBLIC PRODUCT · AI AUTOMATION
ConectaYGana
A multilingual customer-service platform with web and WhatsApp, AI-assisted conversations, CRM integrations, n8n workflows and transfer to human agents.
PUBLIC PRODUCT · VOICE & MESSAGING
Comunicabox
A business communications service that brings together SIP/PBX telephony, WhatsApp Business and AI-assisted workflows.
ENTERPRISE · DIGITAL HEALTH
INGESA MiTuSalud
I work within a team of more than 20 developers on a patient telemonitoring platform with around 30 Java 21 and Spring Boot 3.5 microservices and HL7 FHIR.
Flexible delivery model
I can work alone or add people if the project grows
For a normal assignment, you work directly with me. If several projects arrive at the same time, or the scope needs more hands, I can bring in developers I already know and lead. I remain the technical contact.
Direct work with me
A straightforward option for backend, integrations, maintenance or a specific automation.
More capacity when needed
For a larger scope, I can organise additional development without changing your technical contact.
Experience
Where my experience comes from
2023 — Present
Senior Fullstack Java Developer
Altia ConsultoresFinancial services, public administration and digital health. Java/Spring microservices, secure API modernisation and HL7 FHIR interoperability.
2019 — 2023
Freelance Java Developer & DevOps Engineer
CanaritelBuilt and operated multichannel platforms with Java, Spring, SQL/NoSQL, WhatsApp Business API, VoIP, Docker and Linux infrastructure.
2009 — 2019
Founder, Technical Lead & Software Developer
TelevoipLed SaaS, Wi-Fi and VoIP product development. SIP/WebRTC solutions reached more than 1,000 commercial locations and thousands of devices.
Core stack
Technologies I work with
Backend
Java 8–21 · Spring Boot · Spring Cloud · REST · SOAP · Kafka
Frontend
Angular · TypeScript · React · Vaadin · HTML · CSS
Platforms
Docker · Kubernetes · GitLab CI/CD · Linux · WebLogic · JBoss
Data & security
PostgreSQL · Oracle · MySQL · MongoDB · Redis · OAuth2 · JWT · Keycloak
AI & communications
LLM APIs · n8n · WhatsApp Business · SIP/PBX · WebRTC
Healthcare
HL7 FHIR · InterSystems · secure biometric-data services
Contact
Tell me what you are working on
Email is usually the easiest way to start. Send me a short explanation of the project, the technology involved and the expected dates. I will tell you honestly whether I can help.
English and Spanish · Remote work from Las PalmasSend me the project details
A short explanation is enough. I will reply personally after reviewing it.