Senior Software Development/Operations Engineer

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

Benefits offered by this job

Health, dental, and vision insurance

Retirement savings plan

Paid time off

Health savings account

Flexible spending accounts

Life insurance

Disability insurance

Tuition reimbursement

Job summary

WEX, Inc. is seeking a Senior Development/Operations Engineer to join the Connected Fleet team in the United States. You will design and build scalable web and back-end applications, delivering seamless customer experiences for large fleets and transportation companies.

Expect collaboration with Sawatch and other WEX engineering teams to drive performance and reliability. You will develop public REST APIs in Python and Node, implement comprehensive testing, and lead automation for CI/CD,

Qualifications

• 5–8 years of professional software engineering experience.
• Backend focus with strong Python, Node.js, Go or C++.
• Experience building and optimizing RESTful APIs and SQL databases.
• Experience with Docker, Kubernetes and cloud platforms.

Responsibilities

• Design, develop, and maintain robust, scalable, and high-performance web applications.
• Develop public REST APIs using Python and Node for inter-service communication.
• Implement automated testing strategies: unit, integration, end-to-end, load, and performance.
• Identify bottlenecks and drive scalability, stability improvements.
• Develop and enhance automation frameworks for testing, monitoring, CI/CD to reduce time to market.
• Conduct code reviews and promote engineering best practices.
• Troubleshoot production issues, write root cause analyses, ensure reliability.
• Maintain documentation: design docs, run books, change management, readiness plans.

Skills

Python

Node.js

Go

C++

REST APIs

SQL

Docker

Kubernetes

AWS

GCP

Azure

Kafka

NoSQL

Web security

Git

CI/CD

Tools

Git

Job description

About the Team/Role

We're looking for a Senior Development/Operations Engineer with strong back-end expertise to join our team. We are part of the 'Connected Fleet' team, developing tools to assist clients driving towards the modern vehicle experience. In addition to working closely with the Sawatch development team of six, you will regularly interface with other WEX engineering teams.

You'll help design and develop intuitive, performant web and back-end applications and deliver seamless customer experiences that enhance the customer experience. These platforms allow large fleets and transportation companies to operate their fleets more efficiently, prevent and reduce fraud and make data‑driven procurement decisions.

How you'll make an impact

• Design, develop, and maintain robust, scalable, and high-performance web applications.


• Develop public REST APIs using Python and Node for inter-service and inter-system communication.


• Implement comprehensive automated testing strategies, including unit, integration, end-to-end, load, and performance testing.


• Identify bottlenecks and tech debt; drive incremental scalability, and stability improvements.


• Develop and enhance automation frameworks for testing, monitoring, auto-scaling, continuous integration and deployment to reduce time to market.


• Conduct code reviews (comment, approve, seek revisions, merge), and champion engineering best practices, and continuously raise the quality bar.


• Troubleshoot complex production issues, devise fixes, author root cause analysis documents, and ensure lasting performance and reliability.


• Maintain robust documentation (design docs, run books, change management docs, and readiness plans).

Experience you'll bring

• 5-8 years of professional experience in software engineering.


• Expertise in backend development, including strong proficiency in Python, Node.js, Go or C++ and building and optimizing RESTful APIs and SQL.


• Strong foundation in data structures and algorithms, object-oriented design, and problem-solving.


• Experience with cloud-native environments, including Docker, Kubernetes, or AWS/GCP/Azure.


• Experience with event-driven architecture and tools like Kafka.


• Familiarity with relational or NoSQL databases; e.g. SQL, MongoDB.


• Expertise in designing and developing internet-scale services with scalability, availability, security, and reliability design tenets.


• Solid understanding of web security fundamentals including authentication, authorization, and data protection.


• Familiarity with Git, automated testing frameworks, and CI/CD workflows.


• Clear written and verbal communication skills, and a collaborative and empathetic mindset.

Other nice-to-haves

• Ability to work within existing codebases with legacy systems constraints.


• Experience or familiarity with telematics data, time-series data, and/or geospatial data.


• Experience with micro-frontends or module federation.


• Experience developing with the assistance of AI-driven tools.


• Experience working with geographically distributed teams.

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: $140,600.00 - $173,100.00