Skill Assessments This user has not passed any tests yet Languages Spanish - Native or Bilingual English - Intermediate * ReportPeople also viewed [![Erny Batista Liriano](https://jobicy.com/data/server-nyc0409/galaxy/mercury/2026/07/avatar_69761_1783537093.jpg) Erny Batista Liriano Full Stack Developer](https://jobicy.com/u/id69761.md) * [![Alexandre Silva](https://jobicy.com/data/server-nyc0409/galaxy/mercury/2026/05/avatar_60298_1779685427.jpg) Alexandre Silva Senior Software Engineer](https://jobicy.com/u/id60298.md) * [![Helder Cavalcante Filho](https://jobicy.com/data/server-nyc0409/galaxy/mercury/2026/07/avatar_69908_1783650956.jpg) Helder Cavalcante Filho Fullstack Developer](https://jobicy.com/u/id69908.md) * [![Rodrigo Saraya](https://jobicy.com/data/server-nyc0409/galaxy/mercury/2026/07/avatar_70912_1784101434.jpg) Rodrigo Saraya Senior Full Stack Software Engineer](https://jobicy.com/u/id70912.md) * [![Bui Hai Minh](https://jobicy.com/data/server-nyc0409/galaxy/mercury/2026/07/avatar_70017_1783741472.jpg) Bui Hai Minh IT Specialist | Fullstack Developer](https://jobicy.com/u/id70017.md) * [![Eya Kaabi](https://jobicy.com/data/server-nyc0409/galaxy/mercury/2026/07/avatar_70845_1784076748.jpg) Eya Kaabi Software Engineer](https://jobicy.com/u/id70845.md) * [![Sergi Cosialls](https://jobicy.com/data/server-nyc0409/galaxy/mercury/2026/07/avatar_70946_1784116832.jpg) Sergi Cosialls AI Solutions Architect | Full-Stack Product Builder](https://jobicy.com/u/id70946.md) * [![Lucas Jesus](https://jobicy.com/data/server-nyc0409/galaxy/mercury/2026/07/avatar_69893_1783637232.jpg) Lucas Jesus Software Engineer](https://jobicy.com/u/lucassjesus.md) [All talent ↗](https://jobicy.com/talent.md) * [Overview](#overview) * [Portfolio](#portfolio) ## About Me I build software, automate it with AI, and secure it. I run VaultBit, a Spanish consultancy where I ship production AI agents and pipelines, perform application security reviews, and design crypto custody architectures. My work combines full-stack development, AI automation, and security. I use tools like n8n, Claude, Next.js, TypeScript, Supabase, Docker, and OWASP-based practices to deliver production systems end to end. I also focus on smart contract security. I completed Cyfrin Updraft's full smart contract security path, including Solidity, Foundry, fuzzing, invariant testing, and formal verification, and I continue practicing audits publicly. Before moving into tech, I worked for years in hospital intensive care and diagnostic imaging. That background gave me discipline, calm under pressure, and a strong sense of responsibility that I bring into my engineering work. I have been building websites, apps, and tools since I was 14, and I continue to work independently on products in AI, crypto, and automation. I value practical execution, clear ownership, and shipping systems that work in production. I am based in Barcelona and open to full-time opportunities, remote or on-site, with compensation in fiat or crypto. ## Skills ### [Python](https://jobicy.com/talent/python.md)[React](https://jobicy.com/talent/react.md)[Docker](https://jobicy.com/talent/docker.md)[TypeScript](https://jobicy.com/talent/typescript.md)[PostgreSQL](https://jobicy.com/talent/postgresql.md)[Rust](https://jobicy.com/talent/rust.md)[Next.js](https://jobicy.com/talent/next-js.md)[Application Security](https://jobicy.com/talent/application-security.md)[Authentication](https://jobicy.com/talent/authentication.md)[Threat Modeling](https://jobicy.com/talent/threat-modeling.md)[Access Control](https://jobicy.com/talent/access-control.md)[Prompt Engineering](https://jobicy.com/talent/prompt-engineering.md)[Solidity](https://jobicy.com/talent/solidity.md)[OWASP](https://jobicy.com/talent/owasp.md)[EVM](https://jobicy.com/talent/evm.md)[Tokenization](https://jobicy.com/talent/tokenization.md)[Secrets Management](https://jobicy.com/talent/secrets-management.md)[N8n](https://jobicy.com/talent/n8n.md)[Formal Verification](https://jobicy.com/talent/formal-verification.md)[Foundry](https://jobicy.com/talent/foundry.md)[Supabase](https://jobicy.com/talent/supabase.md)[Anthropic](https://jobicy.com/talent/anthropic.md)[Astro](https://jobicy.com/talent/astro.md)[Claude Code](https://jobicy.com/talent/claude-code.md) ## Experience Founder @ VaultBit 2024 - Present Founded and run an AI, security, and crypto consultancy. Build production AI agents and pipelines with n8n and Claude, perform OWASP-based application security reviews, and design crypto custody architectures. Also build and operate internal and client-facing full-stack systems. Independent Developer @ Freelance 2018 - Present Built websites, apps, and tools independently since age 14. Developed products in AI-assisted advertising and investment dashboard software, with work spanning crypto and automation. Healthcare Technician (TCAE / Diagnostic Imaging) @ Hospitals, Spain Not specified Worked in hospital intensive care and diagnostic imaging. Gained experience in protocols, pressure handling, incident response, and responsibility for people. ## Education Cyfrin Updraft 2026 Full Smart Contract Security Path, Blockchain Security Completed 9 courses covering Blockchain Basics, Wallets, Solidity, Foundry, Chainlink, Smart Contract Security, Assembly, and Formal Verification. ILERNA Not specified Vocational Healthcare Training, TCAE + Diagnostic Imaging Vocational training in healthcare and diagnostic imaging. Portfolio not available. Services not available.