Senior BackEnd Engineer jobs in United States
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Corpay · 1 day ago

Senior BackEnd Engineer

Corpay is currently looking to hire a passionate and results-driven Senior BackEnd Engineer within their IT Application Development division. In this role, you will stabilize, modernize, and evolve Corpay’s Icarus rebates platform while collaborating with various IT teams.

Financial ServicesFinTechPaymentsRisk Management
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H1B Sponsor Likelynote

Responsibilities

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

Qualification

Node.js (Express.js)AWS JavaScript SDKMySQL optimizationDebugging with PM2RESTful API designLinux scriptingFinancial systems knowledgeFrontend frameworks exposureObservability techniques

Required

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

Preferred

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)

Benefits

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

Company

Corpay provides online payment solutions.

H1B Sponsorship

Corpay has a track record of offering H1B sponsorships. Please note that this does not guarantee sponsorship for this specific role. Below presents additional info for your reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (36)
2024 (14)

Funding

Current Stage
Late Stage

Leadership Team

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Chris Shanahan
SVP, Strategic Partner Group
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Jason Haney
Vice President - Strategic Partners Group
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Company data provided by crunchbase