Senior Java Developer

About the role

We are seeking a highly skilled Senior Java Developer to join our WEX Mobility Engineering team, focusing on building innovative SaaS and PaaS solutions to support the EV energy transition. As part of this global team, you will contribute to developing products that enable on-route charging, at-home charging, and reimbursement solutions for EV users in the US and EU, while also enhancing systems that manage credit issuance and spend controls for fleet managers.

At WEX, software engineers take ownership of delivering high-quality solutions by embracing DevOps and agile best practices. In this role, you will play a critical part in the entire software development lifecycle, from designing scalable architectures to ensuring robust deployment pipelines, empowering the team to achieve exceptional results.

Your expertise in Java and backend systems, along with your ability to collaborate across geographically distributed teams, will help drive the success and evolution of WEX Mobility products, ensuring they remain leaders in enabling sustainable and efficient fleet operations globally.

How you’ll make an impact

• Collaborate with stakeholders to understand customer challenges and design scalable backend solutions.

• Design, implement, and maintain robust REST APIs using Java and related frameworks.

• Optimize and maintain critical legacy systems while modernizing functionality and ensuring stability.

• Become a subject matter expert in your functional area and best practices.

• Analyze existing systems and processes to identify areas for improvement and scalability.

• Support live applications by implementing monitoring, ensuring rapid incident resolution, and driving continuous improvement.

• Proactively review code, foster a culture of quality, and mentor team members.

• Strengthen and drive our engineering process with TDD and BDD, Microservice, and Vertical Slice Architectures.

• Develop CI/CD pipelines and contribute to deployment automation.

• Adapt to new technologies and frameworks while navigating the challenges of working in the highly regulated payments domain.

Experience you’ll bring

• Bachelor’s degree in Computer Science or equivalent education or work experience.

• Solid hands-on experience developing applications using Java, Springboot, REST APIs

• Experience with event-driven microservices architecture using Docker, Kubernetes, Kafka

• Experience in low level technical designing and writing user stories (JIRA, Confluence)

• Strong database skills (SQL, Postgres, Liquibase)

• Demonstrable CI/CD experience

• Excellent written and verbal communication skills

• Pick up new technology and switch between tech stacks with a minimum of fuss

• Are comfortable working on backend code, services, data stores, and infrastructure systems

• Are a solid architect/designer

• Have experience writing modern software deployed in the cloud

• Are comfortable with encryption schemes, modern APIs, and frameworks

• Have worked on agile teams to deliver software iteratively

• Are a highly adaptable, versatile, and dependable member of a highly agile and dynamic software engineering team.

• Are a leader and mentor of the scrum team and perform the role of scrum master when necessary.

• Advocate, mentor, and execute engineering best practices.

• Drive a test-driven development approach and be happy to work and take responsibility for any stage within the software development life-cycle as required.

Plus

• Hands-on experience with:

• Event-driven architecture and tools like Kafka

• Cloud deployment and containerization using Docker and Kubernetes

• CI/CD tools like GitHub Actions or Argo CD

• Infrastructure as Code (IaC) using tools such as Terraform

• Knowledge of encryption schemes, API security, and compliance requirements in regulated environments.

• Proven ability to work effectively on legacy codebases, ensuring minimal disruption while driving modernization efforts.

• Experience with technical design documentation and tools like JIRA and Confluence.

If you are looking for a growing career – come be part of WEX today!