Full-stack architect near Valencia. I take products from architecture to launch on my own, a non-custodial payment processor, a distributed trading platform, a multilingual immigration SaaS and keep them running under real users. Open to select contract and overflow builds.
Systems I designed, built, and keep running.
A non-custodial crypto payment processor: deposits settle straight to the merchant's own treasury, so Caudal never touches custody. That makes the whole game correctness under adversarial conditions, ledger invariants, chain-reorg-safe crediting, and strict multi-tenant isolation — across six EVM chains, with HMAC-signed webhooks, a PHP SDK, and a Stripe-billed subscription model.
A Spain immigration document platform with real users. A multilingual wizard walks applicants through the residency, digital-nomad, and student visa pathways, backed by a rules engine grounded in current immigration law and automated generation of 27 government PDF forms — plus an AI assistant and a passport-photo pipeline.
A crypto trading automation platform built as two cooperating systems, a Laravel API and an independent Python engine that runs the bots, talking over a Redis Streams bus. It survives its own deploys: code hot-swaps while stateful bots keep trading, pausing and resuming position state without interruption. Backtesting, six-exchange support, and a quant layer (Monte Carlo, GARCH, VaR) round it out.
What you get when you hand me a spec.
I own the whole arc, full architecture, build, and ship. Because I run my own products, I'm accountable for what goes live, not just what compiles: I catch the edge cases, make the structural calls, and keep systems standing under real load and real users.
And I move fast. A defined build lands in days, not quarters, so I'm at my best on greenfield work where I can take something from problem to shipped product without needing to be managed.
I take on overflow and contract work when the fit is right, whether your team is underwater on a Laravel/Vue project or you've got something that needs building from scratch.