Senior Integrated Engineer

**About The Team/Role** WEX is seeking a Software Development Engineer 3 (Full Stack) to join our Health \& Benefits Platform technology team. In this role, you will design, build, and deliver scalable microservices and modern web applications that power our next\-generation benefits experience. You’ll be a senior\-level contributor collaborating across teams to build event\-driven systems, reusable frameworks, and user\-focused solutions using C\# .NET, Kafka, and React within a microservice architecture deployed to the cloud. ****How you'll make an impact**** * Lead the development of complex features spanning backend and frontend components. * Apply deep technical expertise to design and implement clean, maintainable, and performant code. * Mentor less experienced engineers and contribute to team design standards. * Partner with architects and product managers to define scalable solutions aligned with the platform’s long\-term strategy. * Ensure that code quality, observability, and maintainability are embedded throughout the software delivery lifecycle. * Design and develop C\# .NET Core microservices that support domain\-driven architecture. * Build and maintain React front\-end applications integrated with REST and GraphQL APIs. * Implement and consume Kafka event streams to enable reliable, asynchronous communication across services. * Contribute to API design, versioning, and documentation to ensure consistency across the ecosystem. * Participate in peer reviews, architecture discussions, and agile ceremonies. * Ensure high quality through unit, integration, and contract testing. * Partner with DevOps and QA to maintain CI/CD pipelines, monitoring, and telemetry for production systems. * Support incident resolution through effective root\-cause analysis and continuous improvement. * Share knowledge, promote best practices, and help evolve WEX’s engineering standards. ****Experience you'll bring**** * Expertise in C\# .NET Core, RESTful API development, and service design. * Strong understanding of microservices, containerization (Docker, Kubernetes), and distributed systems design. * Solid understanding of SQL and NoSQL databases. * Experience with Git, CI/CD pipelines, and automated testing. * Strong problem\-solving, debugging, and collaboration skills. * Effective written and spoken English communication. ****Plus**** * Strong professional software engineering experience. * Experience with React and modern JavaScript/TypeScript frameworks. * Hands\-on experience with Kafka or similar event streaming technologies. * Experience with Domain\-Driven Design (DDD) and Event\-Driven Architecture (EDA). * Familiarity with GraphQL federation (e.g., HotChocolate, Apollo Gateway). * Exposure to Azure or other cloud environments. * Knowledge of OpenTelemetry, Application Insights, or similar observability tools. * Previous experience in health, benefits, or financial services industries. * Demonstrated ability to influence technical direction and mentor other engineers.