Backend Engineer, MTA

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Backend Engineer, MTA based in Spain. This is an opportunity to build and operate the backend infrastructure that powers high-volume email delivery at scale. You'll work on critical systems spanning SMTP delivery, routing, retries, throttling, and delivery controls. The role combines backend engineering with the complexities of distributed systems, email infrastructu…