Senior Software Engineer, Backend (Partner Merchant Interface)

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Software Engineer, Backend (Partner Merchant Interface) based in United States. This role sits within a fast-paced engineering team responsible for the APIs that partners and merchants use to integrate with a modern financial platform. You will contribute to backend systems that support integrations with major global partners and high-volume commerce experiences. The position offers the opportunity to design, develop, and launch scalable distributed systems that directly support business growth. You will collaborate closely with engineers and stakeholders to balance delivery speed, reliability, and long-term technical quality. Your work will involve navigating complex systems, solving multi-component technical challenges, and maintaining resilient production services. The environment emphasizes ownership, continuous learning, clear communication, and strong engineering practices.