2,110,261open jobs
129,993companies
242,180added this week
Browse all
Salary
$60k – $200k per year
Location
Remote (United States)
Employment
Part-Time

First seen by Alion on Oct 30, 2026.

Overview
Company
Impact
Profile match
Headquartered in Seattle, Washington, OpenTrain AI is a specialized freelance talent marketplace and human-in-the-loop data solutions platform. Founded in 2022, the company connects artificial intelligence developers and machine learning teams with vetted global AI trainers, subject-matter experts, and data labelers. The platform supports workflows across natural language processing (NLP), computer vision, audio transcription, and RLHF (Reinforcement Learning from Human Feedback), integrating directly with third-party data annotation tools while managing global contractor compliance, quality assurance, and international payments.
  • $30-$100 per hour equivalent, paid per accepted task
  • 100% remote
  • Part-time
  • About 15 hours a week, you choose when

Put your backend engineering judgment to work on the AI coding systems that are changing how software gets built.

AI coding tools learn from examples and tests written by experienced engineers. The teams building them need backend developers who can write realistic coding challenges, build checks that tell a working solution from a broken one, and judge AI-written code the way an experienced reviewer would. This is remote, part-time contractor work applying your backend expertise to AI coding evaluation.

What you'll do

  • Write realistic backend coding challenges covering new features and bug fixes across services, APIs and codebases
  • Build deterministic verifiers that pass correct solutions and reject incorrect ones
  • Review AI-written solutions for correctness and quality, using code review, debugging, testing and refactoring skills
  • Bring in performance analysis, algorithms and data structures where a task calls for them

Why this is worth your time

  • Earn the equivalent of $30-$100 an hour writing backend coding tasks and verifiers for AI systems
  • Work on AI coding systems, writing the tasks and verifiers that show where generated code succeeds or fails
  • Apply your code review and testing judgment to AI-generated software
  • Fully remote and flexible, no fixed shifts, no commute

Who this is for

  • Fluent in English and able to explain technical ideas clearly
  • Professional backend development experience in a language such as Java, Node.js, Go, Rust, TypeScript, Python or C++, or a similar language
  • Experience building scalable services and APIs, finding bugs and system bottlenecks, and implementing complex features
  • A strong grasp of algorithms, data structures and computer science fundamentals
  • Comfortable refactoring large applications, with strong automated testing, code review and analytical problem-solving skills
  • Helpful background includes unit tests, test strategy design, flaky-test diagnosis, or continuous integration pipeline maintenance.
  • No AI experience needed. You bring the expertise; your judgment helps improve AI models.

Pay and details

  • $30-$100 per hour equivalent; pay is per accepted task, as an independent contractor
  • Part-time, flexible schedule; fully remote, United States

How to apply

1. Apply on OpenTrain (about two minutes): https://app.opentrain.ai/api/out/cmuw5mojr000106mq59qppku7?ch=interlinkjobs&sub=interlinkjobs-cmuw5mojr-us-2026-10

2. Complete the application on the hiring platform.

3. If shortlisted, take a conversational AI interview with technical questions and a coding challenge, whenever it suits you.

Ready to put your backend engineering skills to work on AI coding systems? Apply today.

About OpenTrain AI

OpenTrain AI connects experienced professionals with paid, part-time AI training work: shaping and improving the AI systems that companies are building right now.

PAID OPTIONS: NONE.

Free account
Stop reading job ads. Get the ones that fit.
One free account turns this page into a shortlist built around your stack, your level and your pay.
Match on every job. Stack, seniority, pay and location, scored against your profile.
2,110,261 open roles. Read straight off company career pages, refreshed every day.
Unlimited applications. Every one you send is tracked in one place, on-site or on a company board.
3 tailored CVs a month. Rewritten for the exact job you are applying to. Included free.
Create a free account Continue with Google
Free forever. No card. Under a minute.

Your match

How well do you fit this role?
Two answers are enough for a real match. No account needed.
Check my fit
Answers stay in this browser until you create an account.

Recommended for you based on this role

Backend
Similar stack
Same company
In your city
$90k – $140k per year · Remote (United States) · Full-Time · 2+ years exp · Bachelor's Degree · United States
JavaScript
C#
Node JS
C#
.NET
AI/ML
Copilot
Cursor
Claude Code
AI Agents
Frontend
React.js
Mobile
React Native
DevOps
CI/CD
Apply
Tech Lead (Java) 1 hour ago
$71k – $98k per year (net) · Remote (EU, United Kingdom, Switzerland, Iceland) · Full-Time · Tallinn
Java
Java
Spring Framework
Spring Boot
DevOps
Azure
CI/CD
Git
AWS
Docker
Apply
Remote (United States) · Contractor
SQL
Apply
$60k – $200k per year · Remote (India) · Contractor
Python
JavaScript
TypeScript
C++
AI/ML
LLM
Apply
Tech Lead (Java) 1 hour ago
$65k – $92k per year · Remote (EU, United Kingdom, Switzerland, Iceland) · Full-Time · Riga
Java
Java
Spring Framework
Spring Boot
DevOps
Azure
CI/CD
Git
AWS
Docker
Apply
See all jobs
This is one of many
2,110,261 more open roles from verified company boards, updated every day.