Senior Software Engineer II (C#/.NET)- Payments

About Versapay 🚀

Versapay turns accounts receivable (AR) into a competitive advantage.

Inefficient AR processes slow cash flow and stall growth. Versapay removes friction, unlocks working capital, and accelerates momentum — giving finance leaders the clarity and control they need to drive business forward.

Versapay automates accounts receivable, removing barriers to collecting and reconciling B2B payments. Our solutions connect finance teams, customers, and business systems in one ecosystem to ensure cash flow clarity. With over 10,000 customers and 5M+ companies transacting on the platform, Versapay processes over 110M transactions and $257B annually.

Think you might be the next Veep to join? Read on!!

How you’ll make an impact here – and on your career: Product development at Versapay is organized around pods, each including a Product Manager, engineers, QA, etc. and responsible for a collection of products and features, with others focusing on architecture, integrations, scalability, etc. So we’re looking for someone who can be hands-on designing and developing high-quality state-of-the-art software with a smart, collaborative team. Oh and you can check out ‘things’ in our stack here: https://stackshare.io/versapay/arc

What You'll Do

Build & Deliver

• Design, develop and implement business logic for Versapay’s core payment gateway and related services using C#, .NET 4.8 and modern .NET Core frameworks
• Develop new features, maintain and enhance functionality across different product modules
• Implement new features, improve existing functionality, and fix defects in the payment gateway and related applications
• Write clean, well‑structured, well‑tested code with a strong focus on long‑term maintainability
• Work closely with Product, Design, and other Engineering teams to translate business requirements into technical solutions
• Contribute to technical design discussions and help evolve system architecture in collaboration with Senior and Principal Engineers
• Identify and reduce technical debt while balancing near‑term delivery with long‑term goals
• Support modernization efforts, including the evolution of legacy components toward more modular, service‑oriented designs
• Ensure appropriate levels of performance, scalability, resiliency, logging, monitoring, and security
• Continuously improve CI/CD pipelines, testing strategies, and operational readiness

Experience & Skills

What you'll bring to the team:

• 5+ years of professional software development experience
• Proficiency in C# and a deep understanding of the .NET platform, data structures, and algorithms
• Experience with Microsoft SQL Server and Postgres, including schema design and transactional systems
• Experience building and supporting backend services, APIs, and data‑driven applications
• Strong understanding of software engineering fundamentals: software architecture design, object‑oriented design, SOLID principles, design patterns, testing, and maintainable architecture
• English proficiency for daily communication within international teams

Nice To Haves

• Experience in the payments industry
• Exposure to cloud platforms (AWS)
• Experience with distributed systems, background processing, or service‑to‑service communication
• Familiarity with observability tools (logging, metrics, tracing)

Who You Are

• You are proactive, result-oriented mindset, and have strong problem-solving skills
• You take pride in ownership, from design to deployment to support
• You enjoy helping teammates grow and raising the overall quality bar

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.