Sr. Software Engineer, Full Stack

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

About the Team / Role

We’re looking for a Senior software engineer with strong front-end and back-end expertise to join our NAM Experiences team. You’ll help design and develop intuitive, performant web and back-end applications and deliver seamless customer experiences that enhance the customer experience. These platforms allow large fleets and transportation companies to issue and manage credit for their drivers and operators—powering everything from digital spend controls to real-time transaction insights. You’ll focus on building robust and responsive user interfaces that help fleet managers configure controls, view reports, and streamline daily operations.

​How you’ll make an impact :

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.

​Experience you'll bring :

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 Qualifications :

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.

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 : $121,500.00 - $145,500.00