Software Development Engineer 3

About The Team/Role
Youll join a high-performing engineering team building our modern payments platform,
currently powering corporate payments with plans to expand across all lines of business.
Youll work on an event-driven, microservices architecture in Kubernetes, using Terraform,
Kafka, and CI/CD to enable true continuous delivery. Youll embrace AI-assisted engineering
to improve quality, speed, and your own developer experience.
As a senior engineer, youll tackle complex technical problems, ship production code
regularly, and raise the bar for engineering quality across the team. Youll mentor others,
contribute to architectural decisions, and take ownership of features end-to-end. Your work
directly impacts WEXs ability to process payments reliably and securely at scale.
Who This Role Is For
This role is for engineers who want to do meaningful work on hard problems — not just
Ticket-takers Who Wait To Be Told What To Build.
Were looking for someone who:

• Takes ownership of problems, not just tasks
• Writes clean, testable code and cares about doing things properly
• Can work across the stack when needed, but has depth in backend systems
• Communicates clearly and collaborates well with product and other engineers
• Wants to keep learning and isnt precious about their own code
  

How Youll Make An Impact
Technical Delivery

• Design, build, and ship features end-to-end — from understanding requirements
  

through to production deployment and monitoring

• Write production-quality C#/.NET code with appropriate test coverage
• Build and maintain services that process payments reliably at scale
• Contribute to architectural discussions and technical decision-making
• 
  Use AI-assisted development tools effectively to accelerate your work
  

Quality & Operations

• Own the quality of what you ship — write tests, monitor production, fix issues
• Participate in code reviews that improve the codebase and help others grow
• Reduce tech debt and improve developer experience where you see opportunities
• Support operational excellence through observability, alerting, and incident response
  

Collaboration & Growth

• Mentor junior and mid-level engineers through pairing, code review, and knowledge
  

sharing

• Work closely with Product to understand customer problems and shape solutions
• Communicate technical concepts clearly to both technical and non-technical
  

audiences

• Continuously improve your craft and stay current with modern engineering practices
  

Non-Negotiable Requirements

• You write clean, well-tested C#/.NET code — this is your primary language
• Youve built and operated distributed systems or microservices in production
• You understand event-driven architectures and messaging patterns
• Youve worked with CI/CD pipelines and understand modern DevOps practices
• You take ownership — you dont just write code and throw it over the wall
  

Experience Youll Bring

• 5+ years of software development experience

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• Strong experience with .NET/C# in a production environment
• Experience with cloud-native development (Kubernetes, containerisation,
  

infrastructure as code)

• Familiarity with event streaming, distributed systems, and data-intensive applications
• Experience with modern frontend technologies (Angular, TypeScript) is a plus
• Financial services or payments experience preferred but not required
  

Technology Stack
Youll work with (and should have experience in most of):

• .NET/C# and TypeScript
• Angular
• AWS
• PostgreSQL
• Kubernetes, Terraform, Terragrunt, containerisation
• Event streaming with Kafka
• CI/CD pipelines and infrastructure as code
• AI-assisted developer tools
• and more. Were not short on interesting tech to work with.
  

What Youll Get

• Work on systems that process real payments at scale — your code matters
• A team that values quality, ownership, and continuous improvement
• Opportunity to work with modern tech and shape how we build
• Autonomy to solve problems your way, with support when you need it
• An Inclusive environment where your ideas are heard.