Senior Full-Stack Engineer - Remote, Payments Platform

WEX; Dallas (TX); Remote; USD 122,000 - 146,000; Full time

Job summary

WEX is seeking a remote Senior Software Engineer to contribute to the Beyond Fuel and Expense Management initiative within WEX Mobility Engineering. You will shape architecture, establish practices, and drive the product from design through production launch, spanning web, mobile, APIs, and partner integrations.

Lead full-stack capabilities, design secure REST APIs, and collaborate with Product, Design, Security, and engineering teams across the United States and India.

Qualifications

• Requires 6–8 years of professional software engineering experience.
• Proficiency in Java and Spring Boot; solid object-oriented design and data structures.
• Experience designing REST APIs, distributed systems, and relational data models.
• Experience with cloud platforms (prefer AWS) and automated CI/CD pipelines.
• Knowledge of authentication, authorization, data protection, and secure API design.
• Experience with testing across unit, integration, end-to-end, and performance dimensions.
• Experience building and operating production services with observability and incident troubleshooting.
• Strong communication skills and ability to mentor engineers and improve engineering practices.

Responsibilities

• Contribute to architecture, design, and implementation of the Beyond Fuel and Expense Management platform.
• Build full-stack capabilities across UI, backend services, data models, and external integrations.
• Translate product requirements into technical designs, milestones, and plans.
• Design reusable business capabilities and APIs for web, mobile, and partner experiences.
• Establish patterns for payments, expense capture, approvals, spend controls, and reconciliation.
• Evaluate options and communicate tradeoffs on performance, security, reliability, and cost.
• Write production code, review contributions, and resolve complex issues across the stack.
• Participate in design/code reviews and uphold engineering quality.
• Set standards for automated testing, API contracts, observability, and secure development.
• Ensure production readiness with logs, tracing, metrics, dashboards, and alerts.
• Utilize approved AI tools and validate generated outputs.
• Collaborate with leaders to manage dependencies and risks; own outcomes through deployment and operation.

Skills

Java

Spring Boot

REST APIs

Distributed systems

Cloud (AWS)

CI/CD pipelines

Security design

Testing (unit/integration)

AI coding assistants

Code review

Education

Bachelor's degree in CS/Software Eng

Master's degree (preferred)

Tools

GitHub Copilot

Cursor

Claude

Job description

WEX is seeking a remote Senior Software Engineer to contribute to the Beyond Fuel and Expense Management initiative within WEX Mobility Engineering. You will shape architecture, establish practices, and drive the product from design through production launch, spanning web, mobile, APIs, and partner integrations.

Lead full-stack capabilities, design secure REST APIs, and collaborate with Product, Design, Security, and engineering teams across the United States and India.