Senior Full-Stack Engineer - Payments Platform (Remote)

WEX Inc.; United States; Remote; USD 122,000 - 146,000; Full time

Benefits offered by this job

Health, dental and vision insurances

Retirement savings plan

Paid time off

Health savings account

Flexible spending accounts

Life insurance

Disability insurance

Tuition reimbursement

Job summary

WEX Inc. in the United States is seeking a Senior Software Engineer to join the new Beyond Fuel and Expense Management initiative within WEX Mobility Engineering. This is a remote role, with the expectation of residing within 30 miles of one of several major U.S.

hubs for optional in-person collaboration. You will shape the architecture, build backend services and APIs, and deliver secure, scalable payment and expense features across web and mobile applications.

Qualifications

• Bachelor's degree in Computer Science or related field.
• 6–8 years of professional software engineering experience.
• Strong proficiency in Java and Spring Boot.
• Experience designing REST APIs and distributed systems.
• Experience with AWS and automated CI/CD pipelines.
• Knowledge of authentication, authorization, data protection, and secure API design.

Responsibilities

• Contribute to the technical architecture, design, and implementation of the Beyond Fuel and Expense Management platform.
• Build full-stack capabilities spanning UI, backend services, data models, and external integrations.
• Translate product requirements into technical designs, delivery milestones, and implementation plans.
• Design reusable business capabilities and APIs that support web, mobile, and partner experiences.
• Establish patterns for payment workflows, expense capture, approvals, spend controls, transaction reporting, and reconciliation.
• Write production code, review contributions, and resolve complex issues across the application stack.
• Participate in design reviews, code reviews, and technical discussions to support engineering quality.
• Establish standards for automated testing, API contracts, observability, accessibility, and secure development.
• Build production readiness into the product through actionable logs, distributed tracing, metrics, dashboards, and alerts.
• Use approved AI tools throughout development, testing, and documentation, and review and validate all generated output.
• Partner with engineering leaders to identify dependencies, manage technical risks, and support delivery.
• Own technical outcomes from initial implementation through deployment, operation, and continuous improvement.

Skills

Java

Spring Boot

Design patterns

REST APIs

Cloud AWS

CI/CD pipelines

Security best practices

Distributed tracing

Education

Bachelor's degree in Computer Science

Tools

OpenTelemetry

Grafana/Prometheus

Job description

WEX Inc. in the United States is seeking a Senior Software Engineer to join the new Beyond Fuel and Expense Management initiative within WEX Mobility Engineering. This is a remote role, with the expectation of residing within 30 miles of one of several major U.S.

hubs for optional in-person collaboration. You will shape the architecture, build backend services and APIs, and deliver secure, scalable payment and expense features across web and mobile applications.