Backend Engineering Specialist

x.ai

full-time

Posted on: 10/9/2025

Location Type: Remote

Location: Remote • California • 🇺🇸 United States

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💰 $45 - $100 per hour

Mid-LevelSenior

GoGraphQLJavaJavaScriptMongoDBMySQLNode.jsPostgresPythonReactRedisRust

About the role

As a Software Engineering Specialist on the Human Data team, you'll create cutting-edge datasets for training, benchmarking, and advancing large language models, collaborating closely with technical staff.
You'll support xAI's mission by teaching AI models about human interactions, reactions, and problem-solving approaches through labeling and annotating data in text, voice, and video formats.
This includes 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; and working with cross-functional teams to enhance enterprise-level AI-driven coding solutions.
Tasks may involve gathering or providing data, such as recording audio or video sessions, with which candidates must be comfortable to drive innovation.

5+ years of professional back-end development experience.
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.

Benefits

Hourly pay is just one part of our total rewards package at xAI.
Specific benefits vary by country, depending on your country of residence you may have access to medical benefits.
We do not offer benefits for part-time roles.

Tip: use these terms in your resume and cover letter to boost ATS matches.

PythonJavaScriptReactJSC/C++JavaRustGoRESTful APIsGraphQLdatabase optimization

collaborationproblem-solvingcommunication