Senior Software Engineer (PHP)

NMI is looking for an experienced Senior Software Engineer (Full-Stack) to join our Fee Navigator team, part of our Account Management & Signup Tools value stream. FeeNavigator is a platform that automates merchant statement analysis and proposal generation — ingesting a processing statement in virtually any format, classifying every fee, computing markup and potential savings, and producing a signable proposal in seconds. It replaces work that previously took analysts hours per statement, and it sits at the heart of how our partners win and retain merchants.

This role is ideal for a seasoned engineer who can navigate complex systems, enjoys solving genuinely hard engineering challenges, and operates with a high degree of autonomy within a collaborative, agile team.

What will I be doing?

In this role, you'll contribute across the full software development lifecycle — from planning and design through implementation, code review, testing, and deployment. You'll work within a cross-functional team alongside Product and fellow engineers to deliver high-quality, secure software that powers our fee-analysis and proposal platform.

Key duties

• Design, build, and enhance features within FeeNavigator using PHP/Laravel and Vue
• Develop efficient database queries and optimize MySQL performance as needed
• Own the quality of your work end-to-end through developer-led testing — writing unit, integration, and end-to-end tests, and validating your own changes through to production
• Improve the health of a large, established codebase by refactoring complex areas and decomposing high-complexity components into maintainable, well-structured code
• Document critical business logic, application workflows, and key architectural 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 SRE to...