Jr. Software Development Engineer
About the Team/Role
WEX is an innovative global commerce platform and payments technology company looking to forge the way in a rapidly changing environment, to simplify the business of doing business for customers, freeing them to spend more time, with less worry, on the things they love and care about. We are journeying to build a consistent world-class user experience across our products and services and leverage customer-focused innovations across all our strategic initiatives, including big data, AI, and Risk.
We are seeking a software engineer with a strong foundation in computer science and a demonstrated ability to solve technical problems through well-designed, efficient code. This role sits within our Risk Engineering team, where engineers build systems that detect, evaluate, and mitigate risk across credit, fraud, and financial operations.
This is an opportunity to work on high-impact systems where correctness, performance, and reliability matter. You will contribute to the design and development of services that operate at scale and directly influence business outcomes.
How you’ll make an impact
Design & Development
Design, implement, test, and deploy backend services within a microservices architecture
Apply data structures, algorithms, and core software engineering principles to solve real-world problems
Write clean, maintainable, and well-tested code with attention to correctness and performance
Contribute to system design decisions, including service boundaries, data models, and communication patterns
Build and maintain APIs and services that are reliable, scalable, and observable
Use modern development practices including CI/CD and infrastructure as code
Platform & Operations
Support production systems, including debugging, performance analysis, and incident response
Identify bottlenecks and improve system efficiency through measurement and iteration
Work with containerization and observability tools to ensure system reliability
Collaboration
Work closely with engineers and stakeholders to translate business problems into technical solutions
Participate in code reviews and technical discussions with a focus on quality and clarity
Take ownership of assigned work and follow through to completion
Engineering Excellence
Contribute to a high standard of engineering through testing, code quality, and design clarity
Follow and reinforce best practices in software development and system design
Strong Fundamentals: Demonstrates solid understanding of data structures, algorithms, and core software engineering principles
Problem Solving: Able to break down problems and implement effective, well-reasoned solutions
Code Quality: Produces readable, testable, and maintainable code
Ownership: Completes small to moderately complex tasks with limited guidance
Experience you’ll bring
Education
Bachelor's degree in Computer Science, Software Engineering, or a related field OR demonstrably equivalent deep understanding, experience, and capability.
Strong foundation in:
Object-oriented or similar programming paradigms
Complexity analysis (time and space)
Data structures and algorithms
Proficiency in at least one programming language (Java, C#, Go, or Python) with a clear understanding of how it behaves in production systems
Ability to design and implement solutions for moderately scoped problems
Experience writing unit tests and validating code correctness
Ability to write and reason about code independently without reliance on AI-generated solutions, while effectively leveraging AI-assisted development tools (e.g., GitHub Copilot, Cursor, or similar) to improve productivity and code quality
Experience using AI-assisted or spec-driven development tools to accelerate implementation, while maintaining strong understanding of underlying logic, tradeoffs, and correctness
Nice to have:
Experience with scripting languages, preferably TypeScript
Experience with Salesforce API integration
Experience with distributed systems or microservices
Exposure to cloud platforms, containerization, or CI/CD pipelines
Experience working with APIs or data-driven systems
Personal Attributes
Approaches problems with curiosity and rigor, not just trial-and-error
Values correctness, clarity, and maintainability in code
Communicates clearly and works effectively within a team
Uses AI-assisted development tools to enhance productivity, while maintaining full ownership and understanding of the code they produce
WEX is an innovative global commerce platform and payments technology company looking to forge the way in a rapidly changing environment, to simplify the business of doing business for customers, freeing them to spend more time, with less worry, on the things they love and care about. We are journeying to build a consistent world-class user experience across our products and services and leverage customer-focused innovations across all our strategic initiatives, including big data, AI, and Risk.
We are seeking a software engineer with a strong foundation in computer science and a demonstrated ability to solve technical problems through well-designed, efficient code. This role sits within our Risk Engineering team, where engineers build systems that detect, evaluate, and mitigate risk across credit, fraud, and financial operations.
This is an opportunity to work on high-impact systems where correctness, performance, and reliability matter. You will contribute to the design and development of services that operate at scale and directly influence business outcomes.
How you’ll make an impact
Design & Development
Design, implement, test, and deploy backend services within a microservices architecture
Apply data structures, algorithms, and core software engineering principles to solve real-world problems
Write clean, maintainable, and well-tested code with attention to correctness and performance
Contribute to system design decisions, including service boundaries, data models, and communication patterns
Build and maintain APIs and services that are reliable, scalable, and observable
Use modern development practices including CI/CD and infrastructure as code
Platform & Operations
Support production systems, including debugging, performance analysis, and incident response
Identify bottlenecks and improve system efficiency through measurement and iteration
Work with containerization and observability tools to ensure system reliability
Collaboration
Work closely with engineers and stakeholders to translate business problems into technical solutions
Participate in code reviews and technical discussions with a focus on quality and clarity
Take ownership of assigned work and follow through to completion
Engineering Excellence
Contribute to a high standard of engineering through testing, code quality, and design clarity
Follow and reinforce best practices in software development and system design
Strong Fundamentals: Demonstrates solid understanding of data structures, algorithms, and core software engineering principles
Problem Solving: Able to break down problems and implement effective, well-reasoned solutions
Code Quality: Produces readable, testable, and maintainable code
Ownership: Completes small to moderately complex tasks with limited guidance
Experience you’ll bring
Education
Bachelor's degree in Computer Science, Software Engineering, or a related field OR demonstrably equivalent deep understanding, experience, and capability.
Strong foundation in:
Object-oriented or similar programming paradigms
Complexity analysis (time and space)
Data structures and algorithms
Proficiency in at least one programming language (Java, C#, Go, or Python) with a clear understanding of how it behaves in production systems
Ability to design and implement solutions for moderately scoped problems
Experience writing unit tests and validating code correctness
Ability to write and reason about code independently without reliance on AI-generated solutions, while effectively leveraging AI-assisted development tools (e.g., GitHub Copilot, Cursor, or similar) to improve productivity and code quality
Experience using AI-assisted or spec-driven development tools to accelerate implementation, while maintaining strong understanding of underlying logic, tradeoffs, and correctness
Nice to have:
Experience with scripting languages, preferably TypeScript
Experience with Salesforce API integration
Experience with distributed systems or microservices
Exposure to cloud platforms, containerization, or CI/CD pipelines
Experience working with APIs or data-driven systems
Personal Attributes
Approaches problems with curiosity and rigor, not just trial-and-error
Values correctness, clarity, and maintainability in code
Communicates clearly and works effectively within a team
Uses AI-assisted development tools to enhance productivity, while maintaining full ownership and understanding of the code they produce