Valencia, Spain - Remote international roles
Blockchain & backend engineer building production-grade Web3 systems.
Industrial engineer turned blockchain and backend engineer, building secure, production-grade systems that connect real-world operations with Web3 infrastructure.
Solidity, EVM, Camino, ERC-721, IPFS, DeFi mechanics.
Node.js, Express, Spring Boot, PostgreSQL, Swagger/OpenAPI.
React, TypeScript, Gatsby, marketplace flows, Web2/Web3 UX.
type EngineeringJudgment = {
security: "explicit";
architecture: "maintainable";
web3: "pragmatic";
delivery: "production-oriented";
};Featured work
The homepage leads with the strongest evidence: real-world on-chain operations, a live marketplace, and a backend-heavy Web3 ecosystem platform.
Aviation turnaround operations modeled as on-chain workflows.
A blockchain-based aviation turnaround management dApp where each flight turnaround is represented by a smart contract that tracks ground tasks, deadlines, KPIs, and on-chain certification.
A Web2/Web3 vacation-rental platform focused on trust, search, and smoother guest/host interactions.
A vacation-rental platform combining Web2 product functionality with Web3-oriented features, focused on trusted listings, user verification, search experience, and smoother guest/host interactions.
Unified blockchain, market, and developer data for the Casper ecosystem.
A Web3 platform for the Casper ecosystem combining blockchain data, GitHub project data, and cryptocurrency market data into a unified backend and frontend experience.
Blockchain tooling
Fondant strengthens the portfolio beyond application delivery by showing local testing workflows and developer-experience thinking for Casper smart contract work.
A Ganache-like local testing environment for Casper smart contract workflows.
A blockchain application suite and Ganache-like testing environment for the Casper blockchain, packaging CCTL functionality in a Docker-based UI to improve local development and testing workflows.
Engineering focus
Secure, tested smart contract logic with attention to edge cases, access control, incentives, state transitions, and maintainability.
APIs, authentication, database-backed services, integrations, third-party providers, and production-oriented backend architecture.
User-facing applications that connect frontend interfaces with backend services and blockchain systems.
Local environments, blockchain testing workflows, API documentation, CI/CD, and development experience improvements.
Engineering judgment shaped by industrial operations, reliability, constraints, and practical delivery.
Stack
The stack is presented as capability, not a wall of logos.
Secure smart contract logic, protocol mechanics, incentives, state transitions, and wallet-based workflows.
REST APIs, service boundaries, authentication, external integrations, and operational backend design.
User-facing products that connect interfaces, data, identity, integrations, and blockchain flows.
Persistence, object storage, CI/CD, local environments, documentation, and third-party provider integration.
Operational engineering context from automation and controls, useful when modeling real-world workflows in software.
How I build
Start from actors, constraints, state transitions, and operational risk before choosing the technical shape.
Make contracts, APIs, and integration boundaries readable enough to review, test, and maintain.
Treat providers, wallets, networks, identity checks, and external data sources as reliability boundaries.
Build Web3 functionality where it creates traceability, trust, or automation value, not as decoration.