JavaScript Developer | $100/hr Remote

Crossing Hurdles partners with Mercor and a leading AI research team to engage skilled software engineers in training and refining large language models (LLMs). Position: Backend Engineering Specialist (Full Time) Type: Hourly Contract Compensation: $45–$100/hour Location: Remote or in-person Schedule: 9:00am–5:30pm PST for the first two weeks; then aligned with your local time zone Role Overview • Curate advanced coding datasets and benchmark model outputs to improve AI understanding of programming practices • Collaborate with engineering teams to teach AI models human coding techniques including writing, debugging, and optimizing code • Annotate and evaluate AI-generated code across languages to ensure efficiency, scalability, and enterprise-level quality • Provide text, voice, or video data and feedback to help models learn from human expertise Key Responsibilities (Training support will be provided) • Curate and correct code examples in Python, JavaScript (ReactJS), C/C++, Java, Rust, and Go • Assess and refine AI outputs for adherence to programming efficiency and reliability standards • Collaborate cross-functionally to enhance AI-driven coding tools and benchmark large language model performance • Improve annotation tools and data workflows to bolster training quality • Design coding tasks that challenge AI’s technical reasoning and problem-solving ability Ideal Qualifications • Strong professional experience of back-end development experience • Skilled in multiple server-side languages, notably Python and Node.js • Expertise designing and implementing RESTful APIs and GraphQL endpoints • Deep knowledge of relational databases (PostgreSQL, MySQL) and NoSQL systems (MongoDB, Redis) • Strong understanding of database performance optimization and web security best practices • Experience with asynchronous job processing and comprehensive test frameworks Preferred Qualifications • Detail-oriented with excellent logical reasoning and problem-solving skills • Experience in containerization (e.g., Docker) • Familiarity with front-end technologies such as TypeScript or React to aid cross-team collaboration Application Process • Complete a 15-minute screening interview • Technical deep-dive discussion of software engineering and annotation experience • Take-home coding or annotation challenge • Team meet-and-greet with project collaborators