WEX · 2 days ago
Senior Full Stack Software Engineer
United States
Full-time
Remote
Mid, Senior Level
$120K/yr - $160K/yr
5+ years expWEX is a global leader in financial technology solutions, simplifying complex payment ecosystems across Fleet, Corporate Payments, and Benefits. We are seeking a Full Stack Software Engineer (Level 3) who can design and deliver scalable, secure, and modular systems that align with Helix’s pillars, focusing on workflow optimization and payments intelligence.
Financial ServicesFinTechPaymentsSoftware
Responsibilities
Lead design and development of full-stack solutions, with emphasis on event-driven microservices, APIs, and data platforms
Drive iterative modernization, helping decompose monoliths into shared, modular services
Build reusable capabilities aligned with product-centric domain models
Contribute to agentic architectures and intelligent automation that power seamless user experiences
Collaborate with cross-functional teams to deliver measurable business outcomes, not just features
Mentor junior developers and promote Helix-aligned engineering practices
Design, develop, test, and maintain cloud-ready services and APIs
Work with streaming data pipelines (Kafka, CDC, JSON) to enable real-time insights
Implement platform-thinking approaches—build reusable, discoverable capabilities
Ensure quality from the start through automated validation and CI/CD pipelines
Deliver value iteratively, focusing on finishing and deploying features, not just starting them
Partner with product and architecture teams to ensure systems are decoupled, scalable, and SaaS-mature
Use monitoring and feedback loops to drive data-informed improvements
Tackle technical debt proactively, balancing modernization with customer value delivery
Qualification
Required
Bachelor's degree in Computer Science, Engineering, or equivalent experience
5+ years in backend/microservices development (Python, Java, Node.js, etc)
3+ years building RESTful APIs; experience with event streaming (Kafka)
Strong knowledge of CDC, JSON/XML, relational/NoSQL, Postgres and other modern databases
Experience in Unix/Linux environments, scripting, and CI/CD pipelines
Demonstrated ability to decompose systems into modular, reusable services
Excellent communication and collaboration skills across distributed teams
Preferred
Experience with FinTech platforms or payments ecosystems
Exposure to Siebel CRM or other enterprise systems, particularly in integration
Cloud experience (AWS preferred), containerization (Docker, Kubernetes)
Familiarity with modern UI frameworks (React, Angular, Vue.js)
Understanding of AI/ML integration in platforms and workflows
Experience with large-scale transaction or high-availability systems
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
2026-01-03
2025-12-05
2025-12-02
Company data provided by crunchbase