Mid Level Software Engineer

Wex

Wex

Software Engineering
USD 94k-125k / year
Posted on Oct 24, 2025

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 are seeking a Mid mid-level software Engineer in the WEX Mobility Engineering organization. This role will sit in the NAM Experiences team that supports the fleet management and mobility payments solutions to our large customers and partners in North America. Our Mobility systems provide SaaS and API solutions to various customers. WEX Mobility products enable credit issuance to fleet companies and their workers in the form of WEX or cobranded credit cards, usable at fueling stations and select other merchants. At WEX, we provide fleet managers and operators with the flexibility to configure spend controls that restrict fleet members to use their cards at configured merchants, for configured amounts and velocity etc.

​How you’ll make an impact:

  • Design, develop, and maintain robust, scalable, and high-performance code in our backend services.

  • Develop libraries and components that fit into Mobility services.

  • Work with senior engineers to co-develop systems designs, and drive alignment with other engineers.

  • Write automated unit tests, integration tests, end-to-end tests, concurrency tests, load/performance tests.

  • Work with tech leads and senior engineers to identify bottlenecks, outline tech debt, and implement incremental scalability, and stability improvements.

  • Implement automation frameworks for testing, monitoring, auto-scaling, continuous integration and deployment to reduce time to market

  • Collaborate with cross-functional team members, including product managers, designers, and other engineers, to define and implement new features.

  • Seek and conduct code reviews (comment, approve, seek revisions, merge), and actively learn engineering best practices.

  • Dive deep and troubleshoot complex 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 support for production applications by monitoring systems, ensuring rapid incident resolution, and driving continuous improvement.

  • Gain hands-on experience with automation and AI-driven solutions.

​Experience you'll bring:

  • Bachelor’s degree in Computer Science or Software Engineering

  • 2-5 years of professional experience in software engineering.

  • Strong understanding of data structures and algorithms, object-oriented design, and problem-solving skills.

  • Excellent written and verbal communication skills, and a collaborative and empathetic mindset.

  • Proficiency in backend development, with proficiency expertise in Java, Go or C#, and frameworks like SpringBoot, building and optimizing RESTful APIs, ODATA framework, and SQL/Mongo.

Preferred Qualifications:

  • Master’s degree in computer science or software engineering.

  • 5 years of experience in software engineering

  • Expertise in designing and developing internet-scale services with scalability, availability, security, and reliability design tenets.

  • Familiarity with cloud-native architecture (containerization using tools such as Docker and Kubernetes.)

  • 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: $94,000.00 - $125,000.00