Software Engineer - III

At WEX, we simplify the business of running a business.  Our WEX Benefits solutions reduce complexity and help manage costs of benefits administration for our clients and partners.  We are looking for passionate technologists, collaborators, and problem solvers to join our Benefits Technology team as we build the next generation of employer benefits solutions and services.

As a Software Engineer III on the WEX Benefits Technology team, you will operate as a senior contributor and technical anchor within your engineering team. You are expected to deliver high-quality, production-ready software without guidance, demonstrating deep expertise in our technology stack. You will actively present and lead design sessions, driving architectural decisions while employing Test Driven Development (TDD) and accelerating delivery through the effective use of Artificial Intelligence. You are responsible for mentoring SDE I and SDE II team members, fostering a culture of technical excellence and continuous improvement.

Responsibilities:

• Assess unique circumstances and apply creative problem-solving techniques to resolve issues or suggest various approaches. Actively present and participate in team design sessions; propose robust, scalable solutions and defend architectural choices to peers and leadership.

• Design, test, code, and instrument complex solutions without guidance, ensuring all work is production-ready and covers edge cases.

• Mentor SDE I and SDE II engineers, guiding them through technical challenges, code reviews, and career growth discussions.

• Analyze existing systems to identify bottlenecks and technical debt; proactively implement improvements to service performance and system health.

• Support production applications with advanced observability; lead rapid incident response and root cause analysis (RCA) to drive system stability.

• Champion and enforce engineering standards, including TDD, BDD, and Microservice/Vertical Slice Architectures.

• Act as a force multiplier by leveraging AI-powered development tools for code generation and refactoring, and assist the team in integrating AI/ML workflows into the SDLC.

• Serve as a primary code reviewer, ensuring code is readable, maintainable, secure (OWASP), and performant before it reaches production.

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

• Independently complete work and proactively review with others.

• Highly self-motivated, take ownership of your work, actively seek out ways to contribute, and require minimal supervision.

Required Qualifications:

• Bachelor's degree in Computer Science, Software Engineering, or related field;
  OR demonstrable equivalent experience.

• At least 5 years of experience in software engineering.

• Proven ability to deliver complex software features from concept to production without supervision.

• Strong ability to articulate technical concepts to both technical and non-technical audiences.

• Strong problem-solving and analytical skills

• Passionate about keeping up with modern technologies and design.

• Strong proficiency in Angular and/or React

• Experience building and consuming REST APIs

• Proven track record of writing comprehensive unit tests and test suites

• Strong understanding of software security principles and OWASP guidelines

• Proficiency with Git version control and CI/CD pipelines

• Experience with Agile development methodologies

• Track record of delivering complex projects on schedule

• Experience in writing performant stored procedures and functions

• Experience in developing Cloud-Native applications and services

Technology Must-Haves:

• C#, Python (Expert proficiency).

• Deep understanding and application of OOP, SOLID, and design patterns.

• Strong aptitude for integrating AI/ML-driven development workflows into the daily Software Development Lifecycle (SDLC) 

• Cloud & Infrastructure: Azure, Docker, Kubernetes, and GitHub Actions

• Architecture: Knowledge of RESTful API design and Kafka/event-driven design

• Data: Modern RDBMS (e.g., MS SQL, Postgres) and NoSQL databases

• Modern Web UI Frameworks and Libraries (i.e. Angular, React)

• Advanced Querying: GraphQL

Technology Nice-To-Have or Dedicate to Learning Quickly:

• Advanced Ops: Helm, ArgoCD, Terraform

• Emerging Tech: Generative AI models and Agentic AI frameworks (e.g., Autogen, Langchain)

• Tech Leadership: Experience leading small initiatives or serving as a scrum master/team lead.