Senior Software Engineer

Senior Java Software Engineer (*) REMOTE (*) This is a remote position; however, the candidate must reside within 30 miles of one of the following locations: Boston, MA; Chicago, IL; San Francisco Bay Area, CA; Portland, ME; About the Team/Role We are looking for an experienced Senior Java Engineer to design, develop, and maintain highly scalable microservices and event-driven architectures for our high-volume systems. You will work closely with cross-functional teams to deliver distributed, resilient, and performant services that drive critical features of our platform. As a senior member of the team, you will also mentor junior engineers, participate in architectural discussions, and help define best practices for building robust and scalable systems. How you'll make an impact Design, develop, and optimize microservices to handle high throughput and low-latency requirements in a cloud-native environment. Implement event-driven architectures, leveraging technologies like Kafka, RabbitMQ, or similar for real-time data streaming and communication between services. Collaborate with product teams, architects, and other engineers to design and implement features that are scalable, reliable, and maintainable. Write clean, efficient, and reusable code adhering to best practices for security, performance, and maintainability. Ensure smooth integration with external systems and services through APIs, messaging queues, and other protocols. Take ownership of services through the entire lifecycle, from design to deployment, including monitoring, debugging, and scaling in production. Contribute to continuous improvement efforts, identify performance bottlenecks, and drive resolutions for complex technical problems. Stay up-to-date with emerging technologies and trends in microservices, event-driven systems, and cloud platforms. Mentor and provide technical leadership to junior engineers and peer reviews to ensure quality and adherence to standards. Experience you'll bring 5+ years of experience in Java development, with a deep understanding of core Java (Java 8+ preferred). Strong experience in designing and building high-performance microservices using Spring Boot or a similar framework. Expertise in event-driven architectures with technologies like Apache Kafka or RabbitMQ for distributed messaging and streaming. Experience with cloud platforms such as AWS, Google Cloud, or Azure, and familiarity with containerization (Docker) and orchestration tools (Kubernetes). Proficient in RESTful API design and development, including knowledge of API security best practices. Quality driven mindset employing test driven development and automation testing frameworks. Solid understanding of database technologies, both SQL (PostgreSQL, MySQL) and NoSQL (MongoDB). Knowledge of asynchronous processing patterns such as message queues, task scheduling, and distributed transactions. Experience with CI/CD pipelines and deployment automation tools. Strong problem-solving skills, attention to detail, and a collaborative mindset. Excellent communication skills and the ability to work effectively in an agile, fast-paced environment. 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. WEX is a global commerce platform that helps businesses solve for operational complexities like employee benefits, managing and mobilizing fleets, and streamlining payments. WEX is an equal opportunity employer committed to diversity and inclusion in the workplace. All qualified applicants will receive consideration for employment without regard to sex, race, color, age, national origin, religion, sexual orientation, gender identity, protected veteran status, disability or other protected status. WEX promotes a drug-free workplace.

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