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Senior JavaScript/React Engineer AI Training

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Job details

Engagement

Contract, part-time

Location

Remote

United States only

Posted

Nov 6, 2026

OpenTrain on Trustpilot

The work

You will create and evaluate software engineering datasets used to train and test large language models. The work focuses on systems software, infrastructure, performance, scalability, and reliability.

You will review AI-generated code and explain technical judgments clearly. You will also create testing agents and verification methods for systems and infrastructure code.

  • Curate code examples and build or correct solutions in JavaScript, ReactJS, Python, C/C++, Rust, Go, and Java.
  • Evaluate code for correctness, efficiency, scalability, reliability, and performance.
  • Assess AI capabilities across prototyping, architecture, API design, production implementation, monitoring, and operational maintenance.
  • Identify recurring error patterns and support structured software engineering evaluations.

Requirements

Pay details are not provided in the supplied role information. This is a flexible contractor engagement initially planned for one month, with possible extensions based on performance and fit.

  • Workload: 10 to 40 hours per week.
  • Experience: At least three years of software engineering experience.
  • Technical background: Strong systems programming, infrastructure, or backend development experience.
  • Core skills: JavaScript and ReactJS, plus experience with Python, C/C++, Rust, or Go.
  • Engineering ability: Build and deploy scalable production software and understand architecture, design, development, debugging, and code quality review.
  • Communication: Strong written and verbal communication skills for explaining technical decisions.
  • Languages: English
  • Skills: Python, JavaScript, Java, C++, Rust

Open to applicants in

  • United States

Preferred

  • Helpful background: Experience shipping high-impact products in a fast-moving engineering environment and a strong computer science background.

How to apply

  1. Press Apply now. You create a free OpenTrain account and add your resume.
  2. Finish your application on the hiring company's site. The company decides who it hires, so it runs its own form.

Job ID: cmw4vd1zk001w08l5ee9c8o6r

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