Blockchain Engineer

Blockchain Engineer – Mainnet, Wallets & Regulatory Integrations

On-site / Hybrid – Barcelona | Fintech & Crypto Infrastructure

We are a fast-growing fintech startup expanding our Blockchain Engineering team.

We’re looking for a hands-on Blockchain Engineer to work on mainnet integrations, wallet security, and smart-contract interactions in a regulated production environment.

This role operates at the intersection of blockchain technology and regulation, including MiCA, Travel Rule, and compliance-driven transaction flows.What you’ll do

Blockchain & Mainnet Operations

Integrate and maintain mainnets (Ethereum / EVM chains and others as required).

Manage RPC providers, node connections, confirmations, reorg handling and monitoring.

• Implement deposit / withdrawal flows with compliance-ready tracking.

Wallets & Security <...