WEX is a global leader in financial technology solutions, simplifying complex payment ecosystems across Fleet, Corporate Payments, and Benefits. We are transforming our platforms through Helix — a company-wide initiative to modernize technology, accelerate innovation, and deliver exceptional customer experiences.
We’re looking for a Full Stack Software Engineer (Level 2) to contribute to this transformation by designing and building reliable, scalable, and modern services. You’ll help evolve our legacy systems into API-first, modular, and event-driven architectures that enable faster delivery, smarter workflows, and the foundation for agentic, intelligent systems.
As a Level 2 Engineer, you will:
Build and maintain API and microservice-based solutions that align with Helix’s modernization and agentic architecture goals.
Collaborate with senior engineers to decompose monolithic systems into reusable, composable components.
Participate in the full software development lifecycle — design, coding, testing, deployment, and monitoring.
Contribute to data pipelines, event streaming, and workflow automation that support agentic behavior.
Learn and apply Helix principles — quality-first, API-first, reusable by design, and data-driven.
Work cross-functionally with product, QA, and DevOps to ensure solutions are secure, performant, and maintainable
Develop and test secure, maintainable APIs and backend services that power intelligent workflows.
Support event-driven integrations and real-time data processing (Kafka, CDC, JSON).
Implement features that enable automation and intelligent decision flows within agentic systems.
Participate actively in agile ceremonies, delivering incremental value with measurable outcomes.
Contribute to CI/CD pipelines, observability, and automation frameworks.
Write clear, reusable code and documentation to support discovery and reuse across teams.
Collaborate with senior engineers to ensure technical solutions align with long-term Helix architecture
Bachelor’s degree in Computer Science, Engineering, or a related field (or equivalent experience).
2–3 years of professional software development experience.
Experience building or consuming REST APIs.
Hands-on experience with Python, Java, or Node.js.
Familiarity with event streaming platforms (Kafka preferred).
Understanding of databases (SQL/NoSQL) and data exchange formats (JSON, XML).
Experience with Git and basic CI/CD workflows.
Solid understanding of how systems interact through APIs and services.
Strong problem-solving and communication skills.
Exposure to microservices or modernization projects.
Experience in FinTech or payment systems.
Familiarity with cloud environments (AWS preferred) and containerization (Docker, Kubernetes).
Exposure to Siebel CRM or other enterprise applications.
Some experience with front-end frameworks (React, Angular, or Vue).
Interest in AI and automation — especially in how intelligent agents can optimize workflows.
You’re eager to learn from senior engineers and contribute to building the future Helix architecture.
You think about reusability, data flow, and automation when building solutions.
You’re curious about agentic systems and how technology can enable intelligent automation.
You take pride in writing quality code that moves systems closer to cloud-ready, modular design.
You thrive in a collaborative, fast-paced environment where modernization is a shared mission.
WEX (NYSE: WEX) is the global commerce platform that simplifies the business of running a business. WEX has created a powerful ecosystem that offers seamlessly embedded, personalized solutions for its customers around the world. Through its rich data and specialized expertise in simplifying benefits, reimagining mobility and paying and getting paid, WEX aims to make it easy for companies to overcome complexity and reach their full potential. For more information, please visit www.wexinc.com.
