Software Development Engineer 4

Job Description:

Introduction

WEX is a global leader in financial technology solutions, simplifying complex payment ecosystems across Fleet, Corporate Payments, and Health & Benefits. For further details, do visit www.wexinc.com. We are driving a major technology transformation to modernize our platforms, accelerate innovation, and deliver exceptional customer experiences.

We are seeking a Staff Software Engineer (SDE-4) who can design and deliver scalable, secure, and modular systems that align with our technology stack. This role offers an opportunity to work with a team that handles the Electric Vehicle integrations within the broader WEX ecosystem.

The team builds modular and scalable micro-services leveraging modern technologies across the entire architecture which are highly available, easy to maintain, resilient enough, developer friendly and performant.
 

Scope of Role

As a Level 4 Engineer, you will:

• Lead design and development of full-stack solutions, with emphasis on event-driven micro-services, APIs, and data platforms.

• Drive iterative modernization, helping decompose monoliths into shared, modular services.

• Build reusable capabilities aligned with product-centric domain models.

• Contribute to agentic architectures and intelligent automation that power seamless user experiences.

• Collaborate with cross-functional teams to deliver measurable business outcomes, not just features.

• Collaborate with partners to integrate a broad range of EV services with WEX

• Mentor junior developers and promote best engineering practices.

What You’ll Do

• Design, develop, test, and maintain cloud-ready micro-services and APIs.

• Work with streaming data pipelines (Kafka, CDC) to enable real-time insights.

• Implement platform-thinking approaches—build reusable, discoverable capabilities.

• Ensure quality from the start through automated validation and CI/CD pipelines.

• Deliver value iteratively, focusing on finishing and deploying features, not just starting them.

• Partner with product and architecture teams to ensure systems are decoupled, scalable, and SaaS mature.

• Use monitoring and feedback loops to drive data-informed improvements.

• Tackle technical debt proactively, balancing modernization with customer value delivery.

Required Qualifications

• Bachelor’s/Master’s degree in Computer Science and Engineering.

• 8+ years in backend/micro-services development (Java, Python, GoLang etc.)

• Hands-on experience with Java and Java related frameworks.

• Expertise in object oriented design and programming.

• Strong problem solving skills in the software engineering domain.

• Experience in working on modern backend micro-services architecture.

• 6+ years in building Restful APIs, exposing and consuming; experience with message broker and event streaming (Kafka).

• Strong knowledge of SQL, relational and non relational databases.

• Comfortable working with JSON, XML, YML and other interfacing file types.

• Experience in Unix/Linux environments, scripting, and CI/CD pipelines.

• Demonstrated ability to decompose systems into modular, reusable services.

• Excellent communication and collaboration skills across distributed teams.

Nice to Have

• Experience with FinTech solutions or payments ecosystems.

• Cloud experience (AWS preferred), containerization (Docker, Kubernetes).

• Familiarity with modern UI frameworks (React, Angular, Vue.js).

• Familiarity with Change Data Capture (CDC) tools.

• Understanding of AI/ML integration in platforms and workflows.

• Experience with large-scale transactions and highly available systems.

What Makes You a Great Fit

• You embody our engineering principles: API-first, modular, iterative, data-driven.

• You thrive in modernization work, making legacy systems more agile.

• You value finishing and delivering over just starting.

• You see engineering as a way to unlock business outcomes, not just write code.

• You champion quality, automation, and reusability in everything you build.