Senior Software Engineer (C#)

Senior Software Engineer (C#)

NMI is a leading provider of payment gateway solutions, specializing in card-present solutions and payment processing. Our innovative technologies empower businesses to securely accept payments and optimize transaction processes. With a focus on reliability, security, and innovation, we continuously push the boundaries of what's possible in the payments industry.

We are seeking an experienced Software Engineer to join our Payments Processing group. This group focuses on developing and maintaining world-class payment solutions, including PIN pad and card reader integration and processor / acquirer connectivity.

The Ideal Candidate :

The ideal candidate is a highly skilled software engineer with deep expertise in one or more of the following domains :

• Backend development (C# / .NET)
• Mobile SDK development for Android (Java / Kotlin) or iOS (Objective-C / Swift)

You don't need to be an expert in all these areas, but you should bring senior-level technical depth and design experience in at least one, combined with the ability and curiosity to work across the stack when needed.

As a Senior Engineer, you will play a key role in designing, developing, and maintaining SDKs and backend components that enable secure, performant, and seamless payment transactions. You will be expected to take ownership of complex problems, influence architectural decisions, and contribute to improving our CI / CD, testing, and deployment processes. You'll also provide mentorship, participate in design discussions, and help ensure that our systems and SDKs meet the highest standards of security, reliability, performance, and maintainability.

Key Responsibilities :

Skills & Experience :

As well as being a part of something exciting everyday, you will also receive the following benefits :

We are an Equal Opportunities employer and will provide reasonable support throughout the recruitment process to applicants who have a disability. Please let us know in advance so that any support, aids or adaptations can be put in place to assist you.

Please be aware that all offers of employment are made subject to receipt of satisfactory background and financial checks.

About us

NMI enables our partners with choice, and challenges the one-size-fits-all approach to payments. You've probably used NMI in the last 24 hours without even realizing it. We're the platform that powers success for innovative tech created by SMBs, entrepreneurs and fintech start-ups. We're creative problem solvers who help visionaries smash through boundaries and think beyond what's possible so they can think about what's next. But we're not just built for the tech savvy. We democratise the latest payments technology so that everyone can realize the benefits of easy payments across the full spectrum of commerce. We're all about enabling more payments in more ways and more places.