Software Development Engineer 3

We are seeking a seasoned Sr. Software Engineer in the WEX Mobility Engineering organization. This role will sit in the North America Mobility team that caters fleet management and mobility payments solutions to our large customers and partners in the North America region. Mobility development team spans across USA, Brazil, and India. 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 fuel discounts, and flexibility to configure spend controls that restrict fleet members to use their cards at configured merchants, for configured amounts and velocity.

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

Develop public REST APIs using Java and internal gRPC APIs for inter-service and inter-system communication.

Craft systems designs, lead design decisions, and drive alignment with other senior engineers.

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

Analyze existing systems to identify bottlenecks, tech debt, and implement scalability, and stability improvements.

Implement automation for testing, monitoring, healing, and scaling applications, continuous integration and deployment to reduce time to market

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

Conduct code reviews (comment, approve, seek revisions, merge), mentor junior and mid-level engineers, and actively promote engineering best practices.

Dive deep and troubleshoot complex issues, devise fixes, author root cause analysis documents, and ensure lasting performance and reliability.