WEX · 5 hours ago
Sr. Software Engineer, Full Stack
United States
Full-time
Remote
Mid, Senior Level
$122K/yr - $146K/yr
5+ years expWEX is seeking a Senior Software Engineer with strong front-end and back-end expertise to join their NAM Experiences team. The role involves designing and developing high-performance web applications and enhancing customer experiences for large fleets and transportation companies.
Financial ServicesFinTechPaymentsSoftware
Responsibilities
Design, develop, and maintain robust, scalable, and high-performance web applications
Build and evolve shared component libraries and design-system assets used across multiple Mobility applications
Develop systems designs, and drive alignment across teams
Develop public REST APIs using Java and internal gRPC APIs for inter-service and inter-system communication
Implement comprehensive automated testing strategies, including unit, integration, end-to-end, load, and performance testing
Identify bottlenecks and tech debt; drive incremental scalability, and stability improvements
Develop and enhance automation frameworks for testing, monitoring, auto-scaling, continuous integration and deployment to reduce time to market
Partner with Product, Design, and UX to deliver high-quality user experiences
Conduct code reviews (comment, approve, seek revisions, merge), and champion engineering best practices, and continuously raise the quality bar
Troubleshoot complex production issues, devise fixes, author root cause analysis documents, and ensure lasting performance and reliability
Maintain robust documentation (design docs, run books, change management docs, and readiness plans)
Provide live-site production support, ensuring rapid incident resolution, and driving continuous improvement
Drive cross-team projects as a single-threaded-owner (STO) or tech lead, and actively unblock other engineers to make progress
Gain hands-on experience with automation and AI-driven engineering solutions
Qualification
Required
Bachelor's degree in Computer Science or Software Engineering
5-8 years of professional experience in software engineering
Strong foundation in data structures and algorithms, object-oriented design, and problem-solving
Expertise in designing and developing internet-scale services with scalability, availability, security, and reliability design tenets
Proven experience with micro-frontends or module federation
Strong proficiency with modern front-end frameworks such as Angular (preferred) or React
Strong skills in TypeScript/JavaScript, HTML5, or CSS3/SASS
Experience integrating front-end applications with RESTful or GraphQL APIs
Solid understanding of web security fundamentals including authentication, authorization, and data protection
Familiarity with Git, automated testing frameworks, and CI/CD workflows
Excellent collaboration and communication skills with a focus on user experience and maintainability
Clear written and verbal communication skills, and a collaborative and empathetic mindset
Proficiency in backend development, with proficiency expertise in Java, Go or C#, and associated frameworks like SpringBoot, building and optimizing RESTful APIs, ODATA framework, and SQL/Mongo
Preferred
Master's degree in computer science or software engineering
8 years of experience in software engineering
Experience with micro-frontends or module federation
Exposure to backend technologies such as Java(preferred) or Node.js
Experience with cloud-native environments, including Docker, Kubernetes, or AWS/GCP/Azure
Experience with event-driven architecture and tools like Kafka
Familiarity with relational or NoSQL databases; e.g. SQL, MongoDB
Awareness of API security and PCI DSS compliance requirements
Ability to work on existing codebase, contribute improvements, and adapt to legacy systems' constraints
Benefits
Health, dental and vision insurances
Retirement savings plan
Paid time off
Health savings account
Flexible spending accounts
Life insurance
Disability insurance
Tuition reimbursement
And more
Company
WEX
Wex is a financial technology service provider for fleet, travel and healthcare industries.
5001-10000 employees
H1B Sponsorship
WEX 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 (22)
2024 (10)
2023 (12)
2022 (20)
2021 (14)
2020 (18)
Funding
Current Stage
Public CompanyTotal Funding
$900MKey Investors
Warburg Pincus
2025-02-25Post Ipo Debt· $500M
2020-06-30Post Ipo Equity· $90M
2020-06-30Post Ipo Debt· $310M
Leadership Team
Melissa Smith
Chair and Chief Executive Officer
Sachin Dhawan
Chief Technology Officer
Recent News
2026-02-06
2026-02-05
Morningstar.com
2026-01-22
Company data provided by crunchbase