Software Engineer II

NMI

6h•Remote

About The Position

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.

Requirements

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

Nice To Haves

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

Responsibilities

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