I’m Juan Núñez, a full stack developer who builds scalable web applications across SaaS, eCommerce, OTT, and AI/RAG domains. My day-to-day is focused on TypeScript, React/Next.js, Node.js, and NestJS, with an architecture mindset grounded in DDD, SOLID, Hexagonal Architecture, and TDD—so the systems I ship stay maintainable as they grow. Right now, I’m the founder of Leanicon in Madrid, where I help teams avoid the usual “hourly billing + empty-repo rework” failure modes. I lead product-shaped engagements with fixed scope/price and strong delivery incentives, and I’ve recently worked on multi-tenant SaaS backends, OAuth2.0 modules, eCommerce platforms, OTT streaming apps, and AWS-based RAG pipelines.…I’m Juan Núñez, a full stack developer who builds scalable web applications across SaaS, eCommerce, OTT, and AI/RAG domains. My day-to-day is focused on TypeScript, React/Next.js, Node.js, and NestJS, with an architecture mindset grounded in DDD, SOLID, Hexagonal Architecture, and TDD—so the systems I ship stay maintainable as they grow. Right now, I’m the founder of Leanicon in Madrid, where I help teams avoid the usual “hourly billing + empty-repo rework” failure modes. I lead product-shaped engagements with fixed scope/price and strong delivery incentives, and I’ve recently worked on multi-tenant SaaS backends, OAuth2.0 modules, eCommerce platforms, OTT streaming apps, and AWS-based RAG pipelines.WWWW…