Software Engineer II

NMI is looking for a passionate Intermediate Software Engineer to join our Gateway Portals team. Gateway Portals is responsible for a suite of partner- and merchant-facing web portals that enable configuration, management, reporting, and support across NMI's payments ecosystem. These portals are a critical touchpoint for our customers and partners, and play a key role in how merchants interact with NMI's platform.

As part of a cross-functional Scrum team, you'll help maintain and evolve multiple production portal applications built in PHP, C#, and modern JavaScript frameworks. This role is ideal for someone who enjoys working across different systems, is curious about how things fit together end-to-end, and thrives in a collaborative, agile environment.

What will I be doing?

In this role, you'll contribute to the full software development lifecycle - from planning and design through implementation, code review, testing, and deployment. You'll work closely with Product, QA, and fellow engineers to deliver reliable, secure, and user-friendly portal experiences for our clients and merchants. You'll have opportunities to work across both front-end and back-end components, gradually building expertise in multiple parts of our stack while contributing meaningful improvements to our platforms.

Key Duties

• Design, build, and enhance features across multiple Gateway Portal applications used by NMI staff, partners, and merchants
• Develop and maintain front-end and back-end functionality using technologies such as PHP, C#, JavaScript, React, and Angular
• Develop and maintain MySQL queries aligned with best practices for performance and scalability
• Write unit, integration, and end-to-end tests to ensure code quality and reliability
• Document business logic, application workflows, and technical design decisions
• Collaborate with Product Managers to refine requirements and contribute to technical solution design
• Participate in code reviews to maintain high engineering standards and share best practices
• Work with Site Reliability Engineering and QA teams to ensure software is observable, resilient, secure, and production-ready
• Diagnose and resolve incidents, defects, and performance bottlenecks in collaboration with cross- functional teams
• Contribute to continuous improvement of development processes, tooling, and engineering practices
  
  Skills and experience
  Required:
  
  • Bachelor's degree in Computer Science or equivalent experience
  • 3+ years of experience developing complex applications
  • Professional experience developing applications in PHP
  • Strong understanding of object-oriented programming and design patterns
  • Experience with relational databases such as MySQL (schema design, query optimization)
  • Familiarity with secure coding principles and building software with security in mind
  • Experience with Git and CI/CD workflows
  • Experience contributing across the full software development lifecycle
  • Experience with modern frontend development (JavaScript, React, NPM, basic CSS)
  • Ability to work both independently and collaboratively
  
  Preferred:
  
  • Experience with containerization technologies (Docker, Kubernetes)
  • Experience working with logging and monitoring systems (e.g., Logz.io, Elasticsearch, or similar tools)
  • Understanding of cloud-native or SaaS architectures (scalability, resilience, multitenancy)
  • Experience using agentic AI tooling (e.g., autonomous coding agents, Claude Code

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

• Annual salary + bonus
• A remote first culture!
• Flex PTO
• Health, Dental and Vision Insurance
• 13 Paid Holidays
• Company volunteer days

What we do!

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 startups. 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 democratize 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.

We believe that having a diverse group of employees strengthens both our work and our workplace. We're focused on making NMI more diverse and welcoming with initiatives like having a dedicated Diversity, Equity & Inclusion action group, diversity goals for hiring, anonymized resume screening, affinity groups such as our Women's network and LGBTQ+ Network, open forums for discussions on diversity and social justice, and measuring inclusion and belonging as part of our regular employee engagement surveys.

Equal Opportunity

NMI is committed to providing equal employment opportunity for all persons regardless of race, color, religion, sex, age, marital status, national origin, sexual orientation or sexual identity, genetic information, citizen status (except those that do not have the legal right to be employed in the United States), disability, military service, service member, veteran status, or any other basis protected by applicable law.

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

Attention job applicants: Please note that in compliance with the data protection regulations within your jurisdiction, any personal information submitted with your job application may be collected and used by NMI for the purpose of recruitment and employment-related activities. By submitting your application, you acknowledge and provide explicit consent to the processing of your personal information as described in our privacy policy found on our website. For more information on how we process your information, please read our privacy policy here: ;br>
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Salary range, depending on experience:

$90,000-$120,000 USD