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Back End Developer

Haystack

$115,200 - $199,700
Dec 1, 2025
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eBay is investing heavily in next-generation AI and backend systems that power global-scale experiences. This role will help build scalable backend services while partnering closely with applied ML engineers, data scientists, and product teams to work across backend systems, AI/ML model integration, and distributed architectures that shape eBay's future platform capabilities.

Requirements

  • Strong proficiency in Java/Kotlin and Python.
  • Deep understanding of distributed systems, backend architecture, and system design.
  • Applied AI/ML model integration
  • Hugging Face
  • PyTorch
  • Spring Boot
  • NoSQL databases

Responsibilities

  • Design, build, and maintain scalable backend services and distributed systems.
  • Write clean, efficient, testable code in Java/Kotlin and Python.
  • Integrate AI/ML models into production systems to enhance product functionality.
  • Apply modular design principles and contribute to backend architectural decisions.
  • Work closely with ML, data, and product teams to deliver end-to-end features.
  • Use AI-driven tools to accelerate development and improve engineering workflows.
  • Participate in technical discussions and influence backend + applied ML system design.

Other

  • 6-8 years of software engineering experience focused on backend systems.
  • Ability to learn new technologies quickly and leverage AI engineering tools.
  • Excellent communication skills and ability to collaborate with distributed teams.
  • Bachelor’s or Master’s degree in Computer Science or related field.
  • Passion for building scalable, high-quality software that impacts millions of users.