C# Developer with Payment/GRPC background
Full-time
US
Oct 19, 2026
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About the Role
About the Role: We are seeking a Senior C# .NET Developer with strong experience in the payments industry—ideally with exposure to payment gateways, PayFacs, or acquirers, or having integratedwith providers such as Stripe, Adyen, Worldpay, or similar. The ideal candidate will be self-sufficient, proactive, and a go-getter who can thrive in a fast-paced environment while taking ownership of end-to-end delivery. This is a senior-level hands-on development role, requiring deep technical expertise, problem-solving ability, and a passion for delivering high-quality software that powers critical payment systems. Key Responsibilities: Design, build, and maintain high-performance C# .NET applications for payment processing, and financial systems. Architect and develop secure, reliable, and scalable services, with a focus on GRPC-based APIs, and integrations. Lead the integration of third-party payment providers, acquirers, and gateways. Ensure compliance with PCI-DSS and other regulatory requirements. Drive best practices in coding standards, architecture, testing, and CI/CD pipelines. Mentor junior developers and contribute to technical leadership. Collaborate closely with stakeholders to deliver innovative payment solutions. Required Skills & Experience: 5+ years of professional experience in software engineering, with at least 3 years in C#/ .NET. Strong background in payments: gateways, PayFacs, or acquirers. Proven hands-on experience integrating APIs (Stripe, Adyen, Worldpa