Senior Software Engineer, Backend

What you will Do

• Design, build, and maintain scalable backend services using C# and .NET.
• Develop the core infrastructure that powers payment routing, connector management, and platform configuration.
• Design secure, extensible APIs that support both customer-facing applications, direct integrations and AI-powered workflows.
• Build reliable, observable services that process high-volume payment transactions with performance and resilience in mind.
• Contribute to platform architecture, engineering standards, and technical decision-making.
• Continuously improve system performance, security, reliability, and developer experience.
• Collaborate closely with other service owning teams to integrate via APIs and real-time data streams, ensuring seamless data flow across the stack & overall platform.
• Lead code reviews, champion backend standards, and drive architectural decisions that keep the codebase healthy as we scale.
• Mentor engineers around you and elevate backend engineering quality across the organization through pairing, documentation and leading by example.
• Work across requirements, implementation, testing, and deployment.

What we are looking for

• 5+ years of experience building production backend services.
• Strong experience with C# and the .NET ecosystem.
• Strong experience in Payments, FinTech, or other high-volume transaction processing environments.
• Experience designing and building RESTful and/or event-driven APIs.
• Strong understanding of relational databases, data modelling, and distributed systems.
• Experience building secure, scalable cloud-based applications.
• Excellent problem-solving, communication, and collaboration skills.
• Ability to provide technical leadership while remaining hands-on in development.

What we can offer you

• Competitive salary
• Stock options with the potential to unlock more equity as we grow
• Flexible PTO and paid parental leave
• Medical, dental, & vision insurance
• 401K, HSA, pre-tax savings programs