[Remote] Senior Software Engineer (PHP)

Note The job is a remote job and is open to candidates in USA. NMI is looking for an experienced Senior Software Engineer (Full-Stack) to join their Fee Navigator team, which automates merchant statement analysis and proposal generation. The role involves contributing across the full software development lifecycle, collaborating with cross-functional teams to deliver high-quality software that powers their fee-analysis and proposal platform. Responsibilities 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 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 Bachelor's degree in Computer Science or equivalent experience 5+ years of experience developing complex applications Fluency in PHP and modern development practices Strong understanding of object-oriented programming and design patterns Experience with relational databases such as MySQL (schema design, query optimization) Experience with modern frontend development (JavaScript/TypeScript, Vue, npm, basic CSS/SCSS) Comfort working in large, established codebases — able to navigate unfamiliar systems, untangle complexity, and make sound changes with limited guidance Familiarity with secure coding principles Experience with Git and CI/CD workflows Experience contributing across the full SDLC Effective use of AI-assisted development tools, with the judgment to know where they add value and the discipline to review and validate their output Ability to work both independently and collaboratively Strong experience with Laravel or similar modern PHP frameworks Experience with the Vue ecosystem (Quasar, Pinia, Vite) Experience with containerization technologies (Docker) Experience with caching technologies (Redis, Memcached) Experience with AWS services (ECS, ECR, S3, SQS) Experience working with logging & monitoring systems (e.g., Sentry, New Relic) Understanding of cloud-native or SaaS architectures (scalability, resilience, multitenancy) Exposure to Python and ML-adjacent services (Flask, Pandas, scikit-learn) Experience integrating AI capabilities into applications, or building workflows that incorporate them Track record of raising engineering standards on a team — improving test coverage, reducing technical debt, or modernizing legacy code Benefits Competitive salary + bonus A remote first culture! Flex PTO Health, Dental and Vision Insurance 13 Paid Holidays Company volunteer days Company Overview NMI is powering the next generation of embedded payments with its modular payment acceptance platform and industry-leading gateway. It was founded in 1998, and is headquartered in Schaumburg, Illinois, US, with a workforce of 201-500 employees. Its website is http//www.nmi.com.