Staff Software Development Engineer – Agentic Applications and Experiences

WEX Inc.; Headquarters (WA); Hybrid; USD 140,600 - 173,100; Full time

Benefits offered by this job

Health insurance

Dental and vision insurances

Retirement savings plan

Paid time off

Health savings account

Flexible spending accounts

Life insurance

Disability insurance

Tuition reimbursement

More benefits

Job summary

WEX Inc. is seeking a Senior Software Development Engineer to join the Fleet Services team, focused on building agentic, cloud-native solutions for the fuel card platform and related architectures.

We design and develop new capabilities that enable delightful experiences for internal and external customers, creating the foundation for new products and services. You will design, develop, and enhance agentic solutions in a cloud-native environment using Java, AWS, Kafka, Elasticsearch,

Qualifications

• Bachelor’s degree in Computer Science, Engineering, or a related technical field.
• Strong experience building cloud-based applications and infrastructure.
• Proficiency with Kafka and Elasticsearch in production systems.
• Experience with AWS and API-driven architectures.
• Backend development with Java; Spring Boot experience preferred.
• Hands-on with Docker and Kubernetes; cloud-native practices.

Responsibilities

• Design, develop, and deliver scalable software solutions using Java, Kafka, Elasticsearch, and cloud-native platforms.
• Contribute to architecture decisions ensuring availability, security, and scalability.
• Build, test, and maintain clean, efficient code and RESTful APIs.
• Participate in code reviews and collaborative problem-solving sessions.
• Troubleshoot complex technical challenges and optimize performance.
• Stay current with emerging technologies to improve engineering practices.
• Ensure operational excellence and outstanding customer experience for products and systems.

Education

Bachelor’s degree in Computer Science, Engineering, or a related technical field

Master’s degree in Computer Science, Software Engineering, or a related field

Java

AWS

Kafka

Elasticsearch

RESTful APIs

Cloud-native platforms

Docker

Kubernetes

Agentic/AI

PCI DSS knowledge

Tools

Docker

Kubernetes

Job description

Senior Software Development Engineer

The WEX Fleet Services team which owns the Over the Road experiences is transforming the future of fleet payments by building agentic, scalable solutions that power WEX’s industry-leading fuel card platform. We design and develop new capabilities that enable delightful experiences for both internal and external customers, creating the foundation for new products, services, and business opportunities. We are looking for a passionate Senior Software Development Engineer who enjoys solving complex problems, passionate about learning and experimenting, building innovative solutions, and collaborating with a talented engineering team. In this role, you will play a key part in designing, developing, and enhancing agentic solutions in a cloud-native environment using industry-leading AI tools/platforms, Java, AWS, Kafka event streaming, Elasticsearch, containerization, and API-driven architectures. This is an opportunity to join an agile, collaborative team where engineers have ownership, make meaningful technical contributions, and deliver solutions that directly impact WEX’s customers and business growth.

How You’ll Make an Impact

• Design, develop, and deliver delightful product experiences that are powered by Agentic capabilities, scalable, reliable software solutions using modern technologies such as Java, Kafka, Elasticsearch, and cloud-native platforms.
• Contribute to architecture and design decisions that support highly available, secure, and scalable systems.
• Build and maintain clean, efficient, well-tested, and maintainable code.
• Develop and optimize RESTful APIs and backend services.
• Participate in code reviews, technical discussions, and collaborative problem-solving sessions.
• Troubleshoot, debug, and resolve complex technical challenges.
• Work across technology stacks and quickly adapt to new tools and frameworks.
• Stay current with emerging technologies and industry best practices to continuously improve engineering practices.
• Ensure operational excellence and best customer experience for all the products and systems owned by the team.

Experience You’ll Bring

• Bachelor’s degree in Computer Science, Engineering, or a related technical field.
• 7+ years of software engineering experience designing, developing, and supporting enterprise-scale applications.
• Strong experience building cloud-based applications and infrastructure using infrastructure-as-code practices.
• Proficiency with event streaming platforms such as Kafka.
• Experience with Elasticsearch, including indexing strategies, query optimization, and data analysis.
• Experience working with cloud platforms such as AWS.
• Strong understanding of software engineering principles, including data structures, algorithms, object-oriented design, scalability, availability, and reliability.
• Strong problem-solving skills with the ability to analyze complex technical challenges.
• Excellent written and verbal communication skills with a collaborative mindset.

Preferred Qualifications

• Master’s degree in Computer Science, Software Engineering, or a related field.
• 8+ years of software engineering experience.
• Experience and knowledge in building Agentic/AI solutions for real world problems.
• Experience designing and implementing event-driven architectures.
• Experience working with card payments or financial services platforms.
• Hands‑on experience with cloud‑native technologies including Docker and Kubernetes.
• Knowledge of API security principles and PCI DSS compliance requirements.
• Experience working within existing codebases and improving legacy systems.
• Strong backend development expertise with Java or C#, including frameworks such as Spring Boot.
• Experience designing, building, and optimizing RESTful APIs, OData services, and SQL‑based solutions.
• Proven experience developing internet‑scale services with a focus on scalability, security, availability, and reliability.

Pay Range: $140,600.00 - $173,100.00

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.

• health insurance
• dental and vision insurances
• retirement savings plan
• paid time off
• health savings account
• flexible spending accounts
• life insurance
• disability insurance
• tuition reimbursement
• and more

WEX is a global commerce platform that helps businesses solve for operational complexities like employee benefits, managing and mobilizing fleets, and streamlining payments. With over 6,500 employees, we work with large and small companies in more than 200 countries and territories, and can tailor our services to meet the unique needs of their businesses. We hire people who share our passion for continuous innovation and client service that is unparalleled in the industry. Offering comprehensive and market competitive benefits, our offerings are designed to support your personal and professional well-being.

WEX is an equal opportunity employer committed to diversity and inclusion in the workplace.

All qualified applicants will receive consideration for employment without regard to sex, race, color, age, national origin, religion, sexual orientation, gender identity, protected veteran status, disability or other protected status.

WEX promotes a drug‑free workplace.

Qualified individuals with a disability have the right to request a reasonable accommodation. If you require a reasonable accommodation as a result of your disability at any point in the job application process, please submit your request through our Reasonable Accommodation Request Form. This form is for accommodation requests only and cannot be used to inquire about the status of applications.