Software Development Engineer - Mobility Engineering

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

Benefits offered by this job

Health, dental, and vision insurance

Retirement savings plan

Paid time off

Job summary

WEX, Inc. is seeking a versatile software engineer to design and maintain backend services and APIs. You will build scalable microservices, work with relational and NoSQL databases, and leverage Kafka, Elasticsearch, AWS, and containerized environments.

You'll operate in an agile, collaborative setting, applying DevOps practices, CI/CD, automated testing, and production support while learning new technologies and owning end-to-end delivery.

Qualifications

• Bachelor's degree in CS, Eng, or equivalent real-world experience.
• 3+ years building backend or distributed applications.
• Strong Java and/or Python with OO design fundamentals.
• Experience with RESTful APIs, microservices, and cloud apps.
• SQL with Oracle/PostgreSQL; NoSQL exposure helpful.

Responsibilities

• Design, develop, and maintain scalable backend services and APIs.
• Build microservices and distributed systems with modern practices.
• Work with relational databases (Oracle/PostgreSQL) and NoSQL.
• Develop with Kafka, Elasticsearch, AWS, and containers.
• Contribute to cloud-native architecture, CI/CD, and testing.

Skills

Java

Python

API design

Object-oriented design

RESTful APIs

Cloud platforms

Education

Bachelor's degree in Computer Science or Engineering

Tools

Kafka

Elasticsearch

AWS

Docker

Kubernetes

Terraform

Job description

About the Team

We are the WEX Mobility team, dedicated to building mission-critical services and modern API interfaces for WEX's industry-leading fuel card platform. We design and develop APIs and scalable services that support both internal and external customers, creating the foundation for new products, capabilities, and opportunities across WEX.

Our team works in a modern, cloud-native environment with technologies including Java, Python, Kafka, Elasticsearch, AWS, APIs, microservices, and containerization. We are an agile and collaborative team that values ownership, technical excellence, adaptability, and continuous learning.

How You'll Make an Impact

• 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.

Experience You'll Bring

• 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.

Bonus Points For

• Experience with Kafka, Elasticsearch, AWS, Java, or Python.

• Experience with Terraform or other infrastructure-as-code tools.

• Experience with Docker, Kubernetes, or other containerization technologies.

• Experience modernizing legacy applications or migrating between database technologies, such as Oracle to PostgreSQL.

• Experience building highly scalable, data-intensive, or distributed systems.

• Experience in payments, fintech, financial services, or other high-volume transaction environments.

• Contributions to open-source projects or personal technology projects.

• Experience using modern AI-assisted development tools to improve engineering productivity and solution quality.

What We're Looking For

We're looking for a versatile and agile software engineer who brings strong backend engineering fundamentals and is comfortable working across databases, APIs, microservices, cloud, and DevOps.

You don't need to be an expert in every technology listed above. We value engineers who can solve problems, learn quickly, adapt to new technology, and take ownership of delivering solutions end-to-end.

If you're passionate about building scalable technology, learning new things, and working with a talented team to solve meaningful problems, we'd love to hear from you.

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. Base pay is one component of WEX's total compensation package. Most sales positions are eligible for commission under the terms of an applicable plan. Non-sales roles are typically eligible for a quarterly or annual bonus based on their role and applicable plan. WEX's comprehensive and market competitive benefits are designed to support your personal and professional well-being. Benefits include health, dental and vision insurances, retirement savings plan, paid time off, health savings account, flexible spending accounts, life insurance, disability insurance, tuition reimbursement, and more. For more information, check out the "About Us" section.

Pay Range: $121,500.00 - $145,500.00