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Software Engineer

Haystack

$78,400 - $139,400
Dec 1, 2025
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eBay's Identity Platform Team owns the core identity services that keep eBay secure and reliable — covering authentication, authorization, user data, sessions, device identity, and the services that support billions of requests daily. This role sits within eBay’s Identity User Platform/Services group, managing global user data and building highly scalable backend services that power almost every product across the eBay ecosystem.

Requirements

  • Strong proficiency in Java / Java EE , REST/SOAP services, HTTP/XML
  • Experience with Oracle, MongoDB, or NoSQL systems
  • Background in distributed systems , ideally at very high scale
  • Solid fundamentals: data structures, algorithms, OOP, design patterns
  • Experience building multi-tier, high-throughput backend systems
  • Node.js
  • Scala

Responsibilities

  • Build and maintain large-scale, distributed backend systems used across the entire eBay platform
  • Design, develop, test, and deliver backend services using Java and modern frameworks
  • Lead end-to-end technical design and influence engineering decisions
  • Contribute to architecture reviews, design discussions, and code reviews
  • Work with Product, Architecture, QA, and Ops to deliver secure, high-performance solutions
  • Support always-on services through shared release and on-call rotations
  • Develop deep domain expertise in identity, data integrity, and high-volume distributed systems

Other

  • Hybrid – Austin, Texas
  • Bachelor’s + 3 years’ experience, or Master’s + 2 years