Staff Software Engineer

WEX is a company focused on providing innovative solutions in the financial services sector. They are seeking a Staff Software Engineer to lead the technical direction of their Digital Credit Application platform, ensuring its stability and performance. This role involves mentoring engineers, driving architectural decisions, and collaborating with product management to design robust systems.

Responsibilities:

• Lead the design, architecture, and implementation of highly available and resilient microservices using Java and the Spring ecosystem
• Drive technical roadmaps, project plans, and architectural decisions, balancing rapid delivery with long-term platform stability
• Be responsible for critical non-functional requirements, including system performance, observability, security, and scalability under high load
• Define and advocate for engineering best practices, including code quality standards, comprehensive testing strategies, and efficient code review processes
• Partner closely with product management and front-end teams to design clean, effective, and robust APIs (REST/gRPC)
• Advise senior leadership on complex technical trade-offs and lead technical initiatives across organizational boundaries, driving consensus and adoption
• Provide technical mentorship and guidance to mid-level and senior engineers, fostering a culture of high engineering standards

Requirements:

• Must reside within 30 miles of one of the following locations: Portland, ME; Boston, MA; Chicago, IL; Dallas, TX; San Francisco Bay Area, CA; and Seattle/WA
• 10+ years of progressive software design and development experience at scale, with significant experience in a technical leadership or staff-level role
• Deep expertise in Java and the Spring ecosystem (Spring Boot, Spring Data)
• Proven experience designing and operating distributed systems and microservices architectures in a cloud environment (AWS, Azure, or GCP)
• Mandatory experience with high-volume data modeling, transactional integrity, and database technologies (both relational like PostgreSQL and NoSQL like Cassandra/MongoDB)
• Strong practical experience with event-driven architectures and messaging systems (e.g., Kafka or RabbitMQ)
• Experience working with Service Mesh technologies like Istio for traffic management, security (mTLS), and resiliency patterns
• Demonstrated commitment to engineering quality, including deep experience with Test-Driven Development (TDD) and designing robust regression testing strategies
• Expert knowledge of CI/CD pipelines, deployment automation, and modern observability tools (e.g., Prometheus, Grafana, Jaeger)
• Excellent analytical skills and capability in identifying and resolving complex, cross-functional problems
• Strong written and verbal communication skills, able to present complex technical concepts clearly
• Bachelor's degree in Computer Science or a related field