Senior Full-Stack Engineer, Part-Time AI Training Apps - Remote (Worldwide)

OpenTrain AI is hiring for this role.

• $140 per hour

• 100% remote

• Part-time independent contractor

• 20 or more hours a week, you choose when

Senior full-stack engineers can earn $140 an hour building complete web applications that AI models learn from.

AI coding models improve by studying well-built software. You will ship whole apps, from schema to screen, that show models how a careful engineer joins the database, cache and interface into one working product.

## What you'll do

• Build dashboards, workflow tools and data platforms end to end in Next.js, Redis and SQL.

• Write sign-in, reporting, live updates and the business rules each app needs.

• Model tables, joins and indexes, then tune queries so pages load fast.

• Style clean, responsive screens with Tailwind CSS and keep every app ready for real users.

## Who this is for

• Five or more years of professional software engineering.

• Deep Next.js skill, including server rendering and API routes.

• Hands-on PostgreSQL, MySQL or a similar SQL database.

• The ability to design a full-stack system across interface, cache and database.

• Professional fluency in English.

• No AI experience needed.

## Why this is worth your time

• Earn $140 per hour for senior full-stack engineering.

• Build complete products instead of isolated tickets.

• Contribute realistic software examples that support AI model development.

• Fully remote and flexible, no fixed shifts, no commute

## Pay and details

• $140 per hour, paid hourly as an independent contractor.

• Part-time, flexible schedule; fully remote, worldwide (95 countries)

• 20 or more hours a week, you choose when

## How to apply

1. Apply on OpenTrain with your resume: https://app.opentrain.ai/api/out/cmw3pwb1z006x07jpboms8pl8?ch=qajobsboard&sub=p_ab35ed109903

2. Complete the application on the hiring platform.

3. If shortlisted, take a short AI interview.

If you bring senior full-stack engineering experience, apply to build AI training applications.

## About OpenTrain AI

OpenTrain AI is an open talent network for AI training and data labeling with self-service hiring and managed service options.