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Senior JavaScript/React Engineer for AI Training (US-Based)

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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 review software engineering examples used to train and evaluate AI models. The work focuses on systems, infrastructure, backend, and performance-critical code.

You will assess whether AI-generated solutions are correct, efficient, scalable, and reliable. You will also write clear reasons for your technical judgments and help create automatic checks for software tasks.

  • Curate code examples and develop precise solutions for training datasets.
  • Correct and refine code in Python, C/C++, Rust, Go, Java, and JavaScript, including ReactJS.
  • Evaluate software across prototyping, architecture, API design, production implementation, monitoring, and operational maintenance.
  • Build verification agents that find error patterns and assess infrastructure code.
  • Design systems that automatically verify solutions to software engineering tasks.

Requirements

This is a remote contractor engagement for candidates based in the United States.

  • Time: 20 or more hours per week.
  • Engagement: Part-time contractor work for one month, with potential extensions based on performance and fit.
  • Language: Fluent English.
  • Experience: At least three years of software engineering experience.
  • Technical background: Strong systems programming, infrastructure, or backend development skills, especially with Python, C/C++, Rust, or Go.
  • Engineering ability: Experience building and deploying scalable, production-grade software.
  • Core skills: Software architecture, development, debugging, and code-quality assessment.
  • Communication: Ability to provide clear, structured reasons for technical evaluations.
  • Skills: Python, JavaScript, Java, C++, Rust

Open to applicants in

  • United States

Preferred

  • Helpful background: Experience working on advanced AI systems or at organizations developing intelligent systems.

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: cmw4vd1vd001u08l5bthwhg48

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