Jobs at WEX Inc.

The role involves designing and developing high-performance web apps, improving user interfaces, maintaining component libraries, and ensuring code quality through comprehensive testing and collaboration with other teams.

Design, build, and maintain scalable backend services and public REST and internal gRPC APIs. Lead system design, implement automated testing, CI/CD, monitoring, and performance improvements. Mentor engineers, conduct code reviews, troubleshoot production incidents, author run books and design docs, and drive cross-team projects as tech lead.

Design, build, and operate cloud-native, agentic AI-driven backend services and RESTful APIs using Java, Kafka, Elasticsearch, and AWS. Contribute to architecture, implement scalable event-driven solutions, write maintainable testable code, troubleshoot production issues, and ensure operational excellence and security.

The Senior Staff SRE leads reliability engineering initiatives, drives operational excellence, mentors staff, and influences architecture to enhance system reliability and performance.

Lead a team of Technical Program Managers to align strategy with delivery, enforce Jira-driven data hygiene and automated governance, drive outcome-focused execution, mature AI/agentic workflows, manage stakeholders and dependencies, and recruit and develop technical program talent to deliver mobility product initiatives.

The Staff Software Development Engineer will design and develop web applications, lead automation testing strategies, and collaborate on user experiences, utilizing strong front-end skills and full-stack exposure.

As a Principal Software Engineer, you'll architect WEX's DaaS platform, establish standards, mentor engineers, drive innovation, and ensure coherent data systems.

Manage a named portfolio of 150–180 B2B accounts to drive retention, identify expansion opportunities, and lead value-first pricing conversations. Perform daily portfolio segmentation, own MBR preparation and RFP/RFI responses, maintain strict Salesforce/Salesloft discipline, flag x-sell leads, and defend against competitive churn while coordinating cross-functional resources to save and grow accounts.

Apply and reconcile customer payments (ACH, wires, lockbox), process adjustments/refunds, resolve posting discrepancies, maintain controls and documentation, train AR staff, support process improvements and stakeholder communications.

Drive end-to-end delivery and continuous improvement of healthcare payments products (HSA debit rails, ACH/RTP, claims reimbursement, real-time notifications). Lead Agile execution, discovery, and cross-functional collaboration; use AI-enabled workflows for research and synthesis. Measure and optimize payment metrics (authorization/decline rates, error rates, cost-per-transaction) and translate customer insights into testable product improvements.

Lead design and delivery of a unified, real-time billing platform that embeds AI/ML to automate reconciliations, detect anomalies, enable predictive insights, and create autonomous finance workflows across global billing operations.

Design, build, test, and support cloud-native microservices and web UIs. Collaborate with product and stakeholders, use TDD/BDD, instrument systems, drive incident response, mentor peers, and improve processes. Deliver performant APIs, stored procedures, and event-driven solutions while ensuring security and reliability.

Manage full-cycle recruiting for sales and corporate/non-technical roles: intake, sourcing, screening, interviewing, offer negotiation, and onboarding. Use Workday and Phenom to maintain accurate candidate data, build talent pools, ensure compliance with EEO/ADA/affirmative action, and improve funnel efficiency through data and process recommendations.

Lead applied AI research to design and prototype Transformer-based Payment Foundation Models and generative AI solutions for fintech use cases. Drive self-supervised pre-training, fine-tuning, model optimization, benchmarking, and evaluation; collaborate cross-functionally to transition prototypes to production and ensure responsible, secure AI deployment while mentoring engineering teams.

Lead and grow the Mobility Mobile Engineering organization to deliver high-quality iOS and Android apps. Define technical vision and roadmap, partner with cross-functional teams, improve engineering processes and metrics, drive delivery of large initiatives, hire and develop managers and engineers, and ensure mobile security, reliability, and product-aligned execution.

Architect, build, and deploy production-grade AI/ML platforms and LLM/RAG solutions. Lead system design, CI/CD and Terraform-based IaC, ensure reliability and monitoring, mentor engineers, run incident response, and prototype emerging AI technologies.

The Principal AI/ML Engineer will lead the development of AI/ML platforms, drive technology architecture, ensure quality and integration, and provide strategic leadership while managing a team of engineers.

Lead global engineering teams to design, build, and operate cloud-native payments platforms. Drive AI-native engineering practices, platform modernization, scalable microservices, and predictable software delivery. Partner with Product, Architecture, Security, and Commercial teams to deliver payment orchestration, processing, treasury, and API-first capabilities while transforming engineering culture and productivity.

The Channel Success Manager builds relationships with consulting channels, provides training, supports sales efforts, ensures customer satisfaction, and collaborates internally to enhance service delivery.

Post-sale Account Executive responsible for client relationships, retention, renewals, and account growth. Serve as strategic advisor, drive product adoption and upsell, coordinate issue resolution across teams, run business reviews, track success metrics, and improve customer success playbooks to increase ARR and reduce churn.