Backend Engineer, Mobility & APIs

WEX, Inc.; Portland (ME); On-site; USD 122,000 - 146,000; Full time

Job summary

WEX, Inc. is seeking a versatile software engineer to design and maintain scalable backend services and APIs, focusing on Java/Python, microservices, and cloud-native architectures.

Join a team using Kafka, Elasticsearch, AWS, and containerized deployments to deliver reliable systems across relational and NoSQL databases, with emphasis on performance, security, and collaboration. Candidates should embrace DevOps practices, code quality, and a commitment to learning new technologies in an agile

Qualifications

• Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent practical experience.
• 3+ years of professional software development experience, preferably building backend or distributed applications.
• Strong programming experience in Java and/or Python, with a solid understanding of object-oriented design and software engineering fundamentals.
• Strong understanding of data structures, algorithms, problem-solving, and API design.
• Experience building and supporting RESTful APIs, microservices, and cloud-based applications.
• Experience working with relational databases such as Oracle, PostgreSQL, or similar technologies, including writing and optimizing SQL.
• Exposure to NoSQL databases, Elasticsearch, or other distributed data technologies.
• Experience with or understanding of event-driven architectures and Kafka.
• Experience with AWS or another major cloud platform, along with exposure to infrastructure-as-code and DevOps practices.
• Understanding of CI/CD, automated testing, containerization, and modern software development practices.
• Ability to work effectively in an agile, collaborative environment and communicate technical concepts clearly.
• Demonstrated curiosity, adaptability, and willingness to learn new technologies.

Responsibilities

• Design, develop, and maintain scalable, reliable backend services and APIs supporting mission-critical business capabilities.
• Build and enhance microservices and distributed systems using modern software engineering practices.
• Work with relational and NoSQL databases, including Oracle and PostgreSQL, with a focus on performance, scalability, and data integrity.
• Develop solutions using technologies such as Kafka, Elasticsearch, AWS, and containerized environments.
• Contribute to cloud-native architecture and help evolve our platforms for scale, availability, security, and reliability.
• Write clean, maintainable, testable, and well-documented code.
• Participate in code reviews and collaborate with engineers, product partners, and other stakeholders to deliver high-quality solutions.
• Troubleshoot complex technical issues and contribute to sustainable, long-term solutions.
• Apply DevOps practices, including CI/CD, automated testing, deployment, and monitoring.
• Demonstrate the ability to learn new technologies and adapt across different technology stacks as business and technical needs evolve.
• Take ownership of projects and contribute from requirements and design through development, testing, deployment, and production support.

Skills

Backend engineering

RESTful API design

Java

Python

Distributed systems

Cloud native / AWS

Education

Bachelor's degree in Computer Science, Engineering, or related field

Tools

Kafka

Elasticsearch

AWS

Oracle

PostgreSQL

Docker

Kubernetes

Job description

WEX, Inc. is seeking a versatile software engineer to design and maintain scalable backend services and APIs, focusing on Java/Python, microservices, and cloud-native architectures.

Join a team using Kafka, Elasticsearch, AWS, and containerized deployments to deliver reliable systems across relational and NoSQL databases, with emphasis on performance, security, and collaboration. Candidates should embrace DevOps practices, code quality, and a commitment to learning new technologies in an agile