Senior Software Engineer - Domestic Wires

The electrical grid isn’t flashy — but it powers everything. Homes, hospitals, factories, and entire cities depend on infrastructure that is always on, carefully regulated, and engineered for resilience. When it works, no one notices. When it doesn’t, everything stops. Domestic Wires plays that role at Mercury. We own the engineering behind secure, compliant, and reliable domestic wire transfers — enabling businesses to move significant amounts of capital with precision and trust. The systems we build must balance speed with safety, scale with strict controls, and product flexibility with regulatory requirements. As a Senior Engineer, you’ll operate at the core of Mercury’s money movement platform. You’ll design and evolve high-reliability systems, influence technical strategy, partner across product, risk, and banking* teams, and mentor others as we scale. This is an opportunity to work on infrastructure where durability, clarity, and strong judgment matter as much as raw speed.