Staff Engineer - Trust & Vault

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Staff Engineer - Trust & Vault based in Spain. Join a senior engineering role focused on protecting sensitive payment data and improving transaction performance at global scale. You’ll lead the architecture of foundational systems spanning card vaulting, tokenization, authentication, and payment optimization. Your work will support secure, resilient payment experiences where reliability, compliance, and performance are non-negotiable. You’ll design bank-grade distributed systems while helping a highly technical team adopt strong engineering practices and full production ownership. The role is deeply hands-on, combining architecture, implementation, technical leadership, and mentorship. You’ll work across Product and senior engineering functions in an international, remote-first environment where your decisions can directly influence the reliability and efficiency of payment infrastructure.