What are the responsibilities and job description for the Senior BackEnd Engineer position at Corpay and Careers?
What We Need
Corpay is currently looking to hire a passionate and results-driven Senior BackEnd Engineer within our IT Application Development division. This position falls under our Corpay Payables line of business and is located in Brentwood, TN. In this role you will play a significant role in stabilizing, modernizing, and evolving Corpay’s Icarus rebates platform. The ideal candidate will have 5 years of hands-on experience in Node.js (Express.js) backend development within the AWS ecosystem. You must be comfortable inheriting legacy systems in order to maintain, stabilize, and refactor them into well-architected, secure, and observable services. You will need deep expertise with Express.js, MySQL, and the AWS JavaScript SDK, coupled with extensive experience managing EC2-based deployments, PM2 process management, and queue-based workloads. You will also contribute to incremental modernization efforts in collaboration with our frontend, DevOps, and modernization teams. You will report into the VP of Technology and regularly collaborate with other IT teams in the business.
How We Work
As a Senior BackEnd Engineer, you will be expected to work in an office environment. Corpay will set you up for success by providing:
The responsibilities of the role will include:
Corpay is an Equal Opportunity Employer. Corpay provides equal employment opportunities to all employees and applicants without regard to race, color, gender (including pregnancy), religion, national origin, ancestry, disability, age, sexual orientation, gender identity or expression, marital status, language, ancestry, genetic information, veteran and/or military status or any other group status protected by federal or local law. If you require reasonable accommodation for the application and/or interview process, please notify a representative of the Human Resources Department.
For more information about our commitment to equal employment opportunity and pay transparency, please click the following links: EEOC and Pay Transparency.
#LI-WK1
#LI-Onsite
Corpay is currently looking to hire a passionate and results-driven Senior BackEnd Engineer within our IT Application Development division. This position falls under our Corpay Payables line of business and is located in Brentwood, TN. In this role you will play a significant role in stabilizing, modernizing, and evolving Corpay’s Icarus rebates platform. The ideal candidate will have 5 years of hands-on experience in Node.js (Express.js) backend development within the AWS ecosystem. You must be comfortable inheriting legacy systems in order to maintain, stabilize, and refactor them into well-architected, secure, and observable services. You will need deep expertise with Express.js, MySQL, and the AWS JavaScript SDK, coupled with extensive experience managing EC2-based deployments, PM2 process management, and queue-based workloads. You will also contribute to incremental modernization efforts in collaboration with our frontend, DevOps, and modernization teams. You will report into the VP of Technology and regularly collaborate with other IT teams in the business.
How We Work
As a Senior BackEnd Engineer, you will be expected to work in an office environment. Corpay will set you up for success by providing:
- Assigned workspace in the Brentwood office
- Company-issued equipment
- Formal, hands-on training
The responsibilities of the role will include:
- Owning and maintaining the legacy Node.js (Express.js) stack, while stabilizing integrations and preparing APIs for modernization.
- Debugging, patching, and refactoring backend services running on AWS EC2 and PM2.
- Refactoring monolithic backend code into maintainable, modular components.
- Designing, implementing, and optimizing RESTful APIs using Express.js.
- Maintaining and enhancing integrations with AWS services using the AWS JavaScript SDK, including S3, SES, Secrets Manager, EC2, and CloudWatch.
- Migrating hardcoded configurations to AWS Secrets Manager and AWS Systems Manager Parameter Store (SSM).
- Implementing observability through structured logging (CloudWatch, X-Ray, Splunk, Dynatrace).
- Optimizing MySQL queries, stored procedures, and schema performance.
- Supporting queue-based batch processes, cron jobs, and month-end reporting workloads.
- Collaborating with frontend, database, and DevOps engineers to ensure consistent architecture and secure integrations.
- Partnering with the modernization team to document APIs and ensure migration readiness.
- Managing queue scaling across various configurations to ensure reliability and memory efficiency.
- 5 years of direct, hands-on Node.js (Express.js) backend development.
- Proven experience debugging and profiling Node.js services using PM2 and Node Inspector.
- Strong understanding of RESTful API lifecycle, authentication, and error handling.
- Extensive experience with the AWS JavaScript SDK (v3 ), including:
- S3 (uploads, signed URLs, static hosting)
- SES (transactional/mime email delivery)
- Secrets Manager / SSM (secure configuration management)
- EC2 and CloudWatch (monitoring, uptime)
- MySQL expertise: query optimization, schema familiarity, stored procedures.
- Experience with Linux scripting, cron, and maintenance of legacy codebases.
- Strong understanding of logging, observability, and performance tuning in production systems.
- Familiarity with AWS Cognito, JWTs, and multi-environment authentication flows.
- Experience with ExcelJS and other Excel/reporting libraries.
- Background in financial or accounting systems.
- Experience refactoring large monoliths incrementally.
- Exposure to Angular or other frontend frameworks (for end-to-end debugging or integration support).
- Medical, Dental & Vision benefits available the 1st month after hire
- Automatic enrollment into our 401k plan (subject to eligibility requirements)
- Virtual fitness classes offered company-wide
- Robust PTO offerings including: major holidays, vacation, sick, personal, & volunteer time
- Employee discounts with major providers (i.e. wireless, gym, car rental, etc.)
- Philanthropic support with both local and national organizations
- Fun culture with company-wide contests and prizes
Corpay is an Equal Opportunity Employer. Corpay provides equal employment opportunities to all employees and applicants without regard to race, color, gender (including pregnancy), religion, national origin, ancestry, disability, age, sexual orientation, gender identity or expression, marital status, language, ancestry, genetic information, veteran and/or military status or any other group status protected by federal or local law. If you require reasonable accommodation for the application and/or interview process, please notify a representative of the Human Resources Department.
For more information about our commitment to equal employment opportunity and pay transparency, please click the following links: EEOC and Pay Transparency.
#LI-WK1
#LI-Onsite