Senior Backend Engineer, Payments Platform (C#/.NET)

Payabli; United States; Remote; USD 140,000 - 180,000; Full time

Benefits offered by this job

Stock options

Flexible PTO

Medical, dental, & vision insurance

401K

Job summary

Payabli is seeking a Senior Software Engineer, Backend, to build the backend interfaces and integrations that sit between complex financial infrastructure and the humans who use it every day—merchant dashboards, onboarding flow, embeddable components, and white-label experiences consumed by platform partners and end users.

In this hands-on role, you'll design and build services powering payment routing, connector management, token intelligence, and platform configuration.

Qualifications

• 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.

Responsibilities

• 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 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 with other service-owning teams to integrate via APIs and real-time data streams.
• Lead code reviews, champion backend standards, and drive architectural decisions.
• Mentor engineers and elevate backend engineering quality across the organization.
• Own the full lifecycle from requirements to deployment; avoid throwing work over the wall.
• Sweat the details: optimize for performance, accessibility, and cross-browser compatibility.

Job description

Payabli is seeking a Senior Software Engineer, Backend, to build the backend interfaces and integrations that sit between complex financial infrastructure and the humans who use it every day—merchant dashboards, onboarding flow, embeddable components, and white-label experiences consumed by platform partners and end users.

In this hands-on role, you'll design and build services powering payment routing, connector management, token intelligence, and platform configuration.