Technical lead · Frontend & backend: React, React Native, TypeScript, Node.js
Understand the system. Build with intention.
Over 15 years between servers and code, with experience in startups, fintech and core products. Open to senior roles and technical collaborations.
Madrid, Spain · CET / CEST
I started in infrastructure: technical support, Linux administration and networks. I learned to look beyond the interface and understand the pieces it depends on.
That foundation evolved into full stack development, financial integrations and frontend leadership. At BETWEEN I work on React libraries, shared tooling and the team’s technical quality.
I also build my own tools to explore how we collaborate with agents: persistent memory, local classification and supervision. The lab is where that curiosity becomes code you can inspect.
Architecture, product and technical leadership. From designing an integration to decisions shared across an engineering team.
Technical Lead
Leading a frontend team and shared tooling for SICE projects.
React / TypeScript / Context / Redux / Zustand / Axios / Testing
Backend Developer
Billing, notifications and backoffice for letsping.com.
Node.js / Express / Hapi / Sockets / AWS / Docker / Redis
Backend Developer
Service decoupling and merchant onboarding.
React / React Native / Node.js / Express / NestJS / AWS / Docker
Full Stack Developer
Analytics platforms for NFT gaming and blockchain projects.
React / Redux / Redux-Saga / Node.js / Express / MongoDB
Full Stack
Onboarding and benefits services for a digital wallet.
React Native / Redux / Redux-Saga / Node.js / Express / AWS
Lab / Open source
My lab for tools, agents and ideas turned into code. Personal projects where I explore new technologies and put engineering decisions to the test.
Local memory so the next agent does not have to start from scratch.
Decisions that outlive a session.View repositoryTypeScript / Local inferenceLaya RouterThe right model for each task. Agent routing with local classification.
View repositoryESM / Multi-agentPinkyRoles, rules and skills that give agents an engineering framework.
View repositoryPython / React / WebSocketRozDocumentation and agents in one supervision workspace.
View repositoryAI-assisted GitLab reviews grounded in your team’s own rules.
View repositoryPython / DesktopCheckPortsWhich port is open, who is using it and what it means.
View repositoryWeb Audio / Chrome MV3Audio NormalizerFewer volume jumps. More control over each tab’s audio.
View repositoryNode.js / CLI / FFmpegSlurpExploring audio pipelines and MP3 conversion from the terminal.
View repositoryAccidental complexity is the greatest enemy of systems. Before adding an abstraction, I ask myself if I need it today or if I'm building it for future convenience that may never come.
Every architectural decision communicates something about how the team understands the business. DDD, Vertical Slicing, Hexagonal Architecture are not technical tools; they are shared languages.
A team with good tools, good documentation, and a good feedback loop delivers better software faster. Investing in Developer Experience isn't luxury; it's strategy.
In fintech and high-concurrency systems, bugs aren't statistics. That's why I design with failure in mind: Result Pattern, circuit breakers, idempotency, monitoring from day one.
I can write the best code on the team or I can make the entire team write better code. The second option always wins. Knowledge that isn't shared doesn't scale.
Every line of code I write exists because someone has a problem to solve. That's never forgotten. Not when I design APIs, not when I review PRs, not when I define standards.
Contact
I work from Madrid on frontend architecture, shared tooling and product development. Let’s talk about engineering challenges where context, quality and the team matter.
Based in Madrid, Spain — CET/CEST (UTC+1/+2)