We are seeking a Senior Blockchain & Backend Engineer to help maintain and evolve Debita by Neitec , our on-chain asset-based private credit infrastructure. This role combines production smart contract engineering with backend integration work across Web3 infrastructure, payment rails, custody providers and off-chain financial systems.

The ideal candidate has already deployed and maintained smart contracts handling real-world capital, understands the full lifecycle from testnet to mainnet, and is comfortable building the backend services required to connect on-chain financial logic with APIs, databases, wallets and settlement flows.

Requirements

• Fluent Spanish is required, as the role involves working closely with Spanish-speaking teams and stakeholders.
• The candidate must be based in Spain, preferably in Madrid, or willing to work within the Spanish time zone.

This is NOT a junior position. We need someone who has...