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Home/Work/OpenTrain AI
Case study

The hiring marketplace for the people training the world's AI.

OpenTrain connects AI labs with vetted trainers and data labelers worldwide — job feed, screening, escrow payouts, and a mobile app that keeps capturing when the signal drops.

OpenTrain AI homepage
Client
OpenTrain AI
Sector
AI data & labor marketplace
What we built
Marketplace web app + native capture app
Live at
opentrain.ai ↗
The challenge

Great labor, no reliable pipeline.

AI labs needed trainers and labelers fast, vetted, and paid reliably in whatever country they happened to be in. Freelance boards weren't built for screening at this depth, and spreadsheets couldn't keep a job feed, proposals and payouts in sync.

The freelancers doing the actual work were often in the field with unreliable connectivity — capturing photo, video and audio that had to survive a dropped connection and sync automatically the moment signal came back.

Before
✕Freelancers work in the field with unreliable connectivity
✕Payouts needed to clear in 110+ countries, reliably
✕Screening interviews were manual and didn't scale
✕No mobile way to capture and queue training data offline
What we built

One console for employers, one app for the field.

◆

Job feed + proposals

Employers post jobs, freelancers propose, both sides see status live.

━

Screening interviews

Structured async interviews built into the application flow.

○

Escrow payouts

Funds held in escrow, released on approval, paid out globally.

●

Offline capture

Photo, video and audio capture queues on-device with no signal.

▢

Background sync

Queued captures upload automatically the moment signal returns.

▭

Realtime messaging

Employer and freelancer chat, in-app, with delivery receipts.

The result

A marketplace that pays out on every continent.

0+
Countries paid out to
0
Surfaces, one codebase
0
Lost captures on reconnect
24/7
Job feed availability
Under the hood
React NativeExpoNodePostgres
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Nexus NC Studio

Full-stack web apps and native mobile apps — designed, built and launched.

dev@nexusncstudio.com

Services

  • Full product build
  • Native mobile apps
  • UI/UX design
  • Automation

Studio

  • About
  • Work
  • Process
  • Engagements
  • FAQ
  • Contact

Elsewhere

  • LinkedIn
  • WhatsApp

© 2026 Nexus NC Studio

PrivacyTerms

Lagos · remote worldwide

Book a 30-min call