Staff Backend Architect & API Leader

WEX, Inc.; United States; On-site; USD 141,000 - 173,000; Full time

Benefits offered by this job

Health insurance

Retirement plan

Paid time off

Health savings account

Flexible spending accounts

Life insurance

Disability insurance

Tuition reimbursement

Job summary

WEX, Inc. is seeking a Staff Software Engineer to design, build, and operate scalable backend services powering our mobile and web applications. You will lead architecture discussions, build REST APIs, and guide distributed microservices with Java and Spring Boot.

Collaborate with cross-functional teams, optimize databases and observability, and mentor engineers while advancing CI/CD, security, and reliability.

Qualifications

• 8-10 years of professional software engineering experience.
• Strong expertise in Java and Spring Boot for back-end systems.
• Proven experience designing RESTful APIs and distributed microservices.
• Solid OO design, data structures, and algorithms knowledge.
• Relational DB design and query optimization (PostgreSQL).
• Experience with Kafka/RabbitMQ and event-driven architectures.
• Familiarity with CI/CD, testing, and security best practices.
• Observability: logging, metrics, tracing, monitoring, alerting.

Responsibilities

• Design, develop, and maintain scalable backend services and APIs.
• Architect and build resilient distributed microservices.
• Lead architecture discussions and produce design docs.
• Optimize databases and implement efficient queries.
• Develop automated tests: unit, integration, performance.
• Improve reliability with observability and tracing.
• Build and enhance CI/CD pipelines and tooling.
• Collaborate with product, security, and platform teams.
• Mentor engineers and promote engineering best practices.
• Address production issues with root-cause analysis.

Skills

Java

Spring Boot

REST APIs

Distributed microservices

Architectural design

Mentoring

Security

Observability

Education

Bachelor's degree in Computer Science or related field

Master's degree in Computer Science or Software Engineering

Tools

PostgreSQL

Kafka

RabbitMQ

Redis

CI/CD

OpenTelemetry

Grafana/Prometheus

AWS

Docker

Kubernetes

Job description

WEX, Inc. is seeking a Staff Software Engineer to design, build, and operate scalable backend services powering our mobile and web applications. You will lead architecture discussions, build REST APIs, and guide distributed microservices with Java and Spring Boot.

Collaborate with cross-functional teams, optimize databases and observability, and mentor engineers while advancing CI/CD, security, and reliability.