Senior Backend Engineer — Payments Infrastructure

Payabli

United States

Remote

USD 120,000 - 180,000

Full time

14 days+
Application generator

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Benefits offered by this job

Competitive salary
Stock options
Flexible PTO
Medical, dental, & vision insurance
401K

Job summary

Payabli is seeking a Senior Software Engineer, Backend, based in the United States to help build the backend that sits between complex financial infrastructure and merchant-facing interfaces. You will design scalable services, implement payment routing, and manage platform configuration within a high-scale system.

In this hands-on role, you will collaborate with Product, AI, and Engineering teams, mentor junior engineers, and influence architectural decisions while delivering secure, observable

Qualifications

  • 5+ years of experience building production backend services.
  • Strong experience with C# and the .NET ecosystem.
  • 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 modeling, 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#/.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.

Skills

C#/.NET
Payments/FinTech
RESTful APIs
Distributed systems
Cloud applications
Problem solving
Technical leadership

Job description

Payabli is seeking a Senior Software Engineer, Backend, based in the United States to help build the backend that sits between complex financial infrastructure and merchant-facing interfaces. You will design scalable services, implement payment routing, and manage platform configuration within a high-scale system.

In this hands-on role, you will collaborate with Product, AI, and Engineering teams, mentor junior engineers, and influence architectural decisions while delivering secure, observable

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