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