Senior Software Engineer, Backend

Payabli is a next-generation Payments Infrastructure and Monetization Platform purpose-built for vertical software companies. They are seeking a Senior Software Engineer, Backend to design and build scalable backend services that power payment solutions and enhance the user experience for platform partners. The role involves collaborating with various teams, mentoring junior engineers, and contributing to the overall architecture of the platform.

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 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
• Raise the bar: Lead code reviews, champion backend standards, and drive architectural decisions that keep the codebase healthy as we scale
• Multiply the team: Mentor engineers around you and elevate backend engineering quality across the organization through pairing, documentation and leading by example
• Own the full lifecycle: Work across requirements, implementation, testing, and deployment. We don't throw things over the wall here
• Sweat the details: Optimize for performance, accessibility, and cross-browser compatibility

Requirements:

• 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