Software Engineer 3, Full-stack

About the role

Join the Customer Support Technology (CS Platform) team building the systems that power eBay’s global customer service experience. This is a full-stack engineering role where you will build scalable backend services and APIs, develop user-facing web applications and agent tools, and contribute to AI-powered platform capabilities, including orchestration layers and automation systems. You will work on workflow systems, automation platforms, and UI experiences that improve agent productivity and customer outcomes. This is a hands‑on IC role (~60–70% coding/design frontend + backend, ~30–40% reviews, collaboration, and operational excellence). You’ll own features end‑to‑end (UI → services → data → actions).

Responsibilities

• Design and build end-to-end features (UI + backend services)
• Develop scalable APIs and user-facing web applications
• Build and enhance agent tools, workflow engines, and automation platforms
• Contribute to AI-powered capabilities, including: agent orchestration, MCP layers and workflows, intent-to-action systems
• Write high-quality, well-tested code across the stack
• Improve performance, scalability, and reliability
• Participate in on-call rotations (follow-the-sun model)
• Collaborate with Product, SRE, and cross-functional teams
• Review code, write design docs, and improve engineering practices
• Reduce tech debt and drive operational improvements
• Mentor junior engineers or lead small workstreams

Qualifications

Must‑have:

• BS/MS in Computer Science, Engineering, or equivalent experience
• 4–8 years of full-stack software development experience
• Backend: strong proficiency in Java (11+) and Spring Boot; experience building REST APIs and distributed systems; familiarity with Kafka or similar messaging systems; experience with SQL + NoSQL databases
• Frontend: strong proficiency in JavaScript/TypeScript; experience with React, Angular, or similar frameworks; experience building responsive, performant web applications; understanding of API integration and async UI patterns
• General: experience