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Backend Engineering Specialist

Xai

$45 - $100
Oct 8, 2025
Palo Alto, CA, US
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xAI is looking to create cutting-edge datasets for training, benchmarking, and advancing large language models by teaching AI models about human interactions, reactions, and problem-solving approaches.

Requirements

  • Proficient in multiple server-side languages (Python, Node.js).
  • Strong experience designing and implementing RESTful APIs and GraphQL endpoints.
  • Hands-on experience with both relational (PostgreSQL, MySQL) and non-relational (MongoDB, Redis) databases.
  • Understanding of database optimization, indexing strategies and query performance.
  • Deep understanding of web security principles, including authentication, authorization and data protection.
  • Experience with asynchronous processing and background job systems.
  • Experience with testing frameworks for unit, integration and end-to-end testing.

Responsibilities

  • AI model training initiatives by curating code examples, offering precise solutions, and meticulous corrections in Python, JavaScript (including ReactJS), C/C++, Java, Rust and Go.
  • Evaluate and refine AI-generated code, ensuring it adheres to industry standards for efficiency, scalability, and reliability.
  • Collaborate with cross-functional teams to enhance AI-driven coding solutions, ensuring they meet enterprise-level quality and performance benchmarks.
  • labeling and annotating data in text, voice, and video formats.
  • curating code examples, providing precise solutions, and making corrections in Python, JavaScript (including ReactJS), C/C++, Java, Rust, and Go
  • evaluating and refining AI-generated code for efficiency, scalability, and reliability
  • working with cross-functional teams to enhance enterprise-level AI-driven coding solutions

Other

  • 5+ years of professional back-end development experience.
  • The ideal candidate for this role is adaptable, possesses strong logical reasoning skills, is detail-oriented, and thrives in a fast-paced work environment.
  • US-based candidates cannot be hired in Wyoming or Illinois at this time.
  • Visa sponsorship is not available.
  • Team members are expected to work from 9:00am - 5:30pm PST for the first two weeks of training, and 9:00am - 5:30pm in their own timezone thereafter.