Sr Staff UI Engineer

This is a remote position; however, the candidate must reside within 30 miles of one of the following locations: Portland, ME; Boston, MA; Chicago, IL; Dallas, TX; San Francisco Bay Area, CA; and Seattle/WA.

About the Team/Role

The Senior Staff UI Developer will serve as a key technical leader responsible for the architecture, development, and consistency of the user interface for the mission-critical Digital Credit Application (DCA).This role is paramount to the entire Credit Application customer journey, focusing on enhancing the application steps required before a credit decision (adjudication) is made. The developer will ensure the application is seamless, mobile-first, and highly performant across all devices, directly addressing customer pain points that cause application abandonment.The developer will proactively solve complex UI/UX challenges, such as integrating features across multiple WEX Lines of Business (LOBs)-including North America Mobility (NAM), Over-the-Road (OTR), and Customer Payment Solutions (CPS)-and resolving inconsistencies arising from conflicting design flows. This position requires a deep commitment to promoting frontend code quality, technical best practices, and transforming the DCA into a unified, secure, and modern digital platform.

How you'll make an impact

• Lead and drive the technical development and architecture of the next-generation digital credit application UI, ensuring its functional richness, reliability, and flexibility.

• Help design the UI architecture and lead the implementation of complex, multi-step user flows.

• Challenge the status quo and drive for better technical solutions to effectively serve the broad business needs of the organization.

• Closely partner with senior engineers and product managers across the organization to deeply understand complex business needs and jointly develop technical solutions.

• Partner closely with the Information Security team to ensure security and privacy are implemented via secure coding practices and access controls.

• Create, prioritize, communicate, manage, and execute front-end roadmaps, project plans, and commitments.

• Set a high technical bar, and provide guidance and mentorship to engineering teams on front-end principles and best practices.

• Advise Senior Leadership on highly complex situations impacting the UI platform and lead technical initiatives, driving high-quality results.

Experience you'll bring

• A technically deep and innovative Software Engineer able to act and deliver to the business needs.

• Have 15+ years of progressive software design and development experience at scale, with proven tenure in a Principal or Senior Staff (L5)-level role.

• Strong software development skills in React (preferred) or Angular/Vue and TypeScript.

• Deep experience architecting, developing, and deploying large-scale, mission-critical applications, including expertise in CI/CD pipelines and automated deployment strategies.

• Proven experience designing and implementing Micro Front-End architectures to enable team autonomy and application scalability.

• Demonstrated mastery of modern UI development trends, including performance optimization (e.g., Core Web Vitals), advanced accessibility standards (WCAG), modern build tools, and innovative compiler techniques.

• Mandatory experience working closely with UX and Product design teams to translate wireframes, user research, and complex user flows into robust, reusable technical components.

• Critical leadership experience in mentoring senior and mid-level engineers, defining technical roadmaps, and driving architectural consensus across multiple teams.

• Expertise in consuming and integrating with backend services using modern data fetching techniques, specifically GraphQL and REST APIs.

• Holds strong engineering principles, including a focus on comprehensive unit and integration testing, code automation, and quality gates.

• Bonus/Preferred: Experience in building highly secure, public and customer-facing applications.

• Bachelor's degree in Computer Science or a related field.

The base pay range represents the anticipated low and high end of the pay range for this position. Actual pay rates will vary and will be based on various factors, such as your qualifications, skills, competencies, and proficiency for the role. Base pay is one component of WEX's total compensation package. Most sales positions are eligible for commission under the terms of an applicable plan. Non-sales roles are typically eligible for a quarterly or annual bonus based on their role and applicable plan. WEX's comprehensive and market competitive benefits are designed to support your personal and professional well-being. Benefits include 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. For more information, check out the "About Us" section. Pay Range: $158,000.00 - $210,000.00