Senior Backend Engineer for AI-Driven Payments

IXOPAY; United States; On-site; USD 140,000 - 210,000; Full time

Benefits offered by this job

Medical, Dental, and Vision

401(k) with Employer Match

Unlimited Paid Time Off

Professional growth opportunities

Job summary

IXOPAY is seeking a Senior Software Engineer to join our Engineering team and help build the backend foundation of IXOPAY's AI-first payment orchestration platform. You’ll design and implement scalable services using C# and .NET, focusing on payment routing, connector management, and secure APIs for high-volume transactions.

You’ll collaborate with Product, AI, and Engineering teams, mentor junior engineers, and contribute to platform architecture, standards, and best practices to deliver

Qualifications

• 5+ years building production backend services.
• Strong C# and .NET experience.
• RESTful or event-driven APIs design.
• Relational DB modeling and distributed systems.
• Cloud-based applications security and scalability.

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 and AI-powered workflows.
• Build reliable, observable services that process high-volume payment transactions with performance and resilience in mind.
• Collaborate with Product and AI teams to translate business requirements into scalable technical solutions.
• Contribute to platform architecture, engineering standards, and technical decision-making.
• Mentor junior engineers through code reviews, design discussions, and day-to-day technical guidance.
• Continuously improve system performance, security, reliability, and developer experience.

Skills

Backend development

C# / .NET

RESTful APIs

Event-driven APIs

Distributed systems

Problem solving

Technical leadership

Collaboration

Education

Bachelor's degree in Computer Science or related field

Tools

Azure

SQL / Relational DB

API design

Job description

IXOPAY is seeking a Senior Software Engineer to join our Engineering team and help build the backend foundation of IXOPAY's AI-first payment orchestration platform. You’ll design and implement scalable services using C# and .NET, focusing on payment routing, connector management, and secure APIs for high-volume transactions.

You’ll collaborate with Product, AI, and Engineering teams, mentor junior engineers, and contribute to platform architecture, standards, and best practices to deliver