Backend Engineering Specialist – Freelance AI Trainer Project
$8–65/hr
Remote coding contract with Invisible, $8–65/hr, open to people in United States. Posted Aug 25, 2025.
$8–65/hr
Apply on InvisibleThis post is over a year old. It was still on Invisible's site on Nov 6, 2026, so it is listed here, but it may be a standing pool rather than a project starting now. Expect a wait after you apply.
Is this job worth applying to?
- Pay
- Below typicalTops out at $65/hr. The typical top rate across 237 priced coding listings is $90/hr.
- Getting in
- Some screeningVaries; several days to weeks. Expertise or language fluency matching a listed project.
- Steady work
- Work is patchyHours can be very low.
- Payout record
- Pays on timeSchedule: varies by project. Payment method not published.
- Freshness
- Over a year oldPosted over a year ago. Still listed on Invisible on Nov 6, 2026.
- Where you live
- Named countries onlyOpen in United States.
The job description
Are you an experienced Backend Engineer eager to shape the future of AI? Large-scale language models are evolving rapidly, moving beyond simple chatbots into powerful engines of research, learning, and applied problem-solving. With high-quality training data, tomorrow’s AI can provide more accurate, practical, and innovative solutions across industries. That training data begins with you—your expertise will help power the next generation of AI.
We’re looking for a highly skilled Backend Engineering specialist who can bring technical depth, coding expertise, and architectural insight to training data. You’ll work with cutting-edge AI tools, evaluate and refine code outputs, and provide expert feedback on correctness, efficiency, scalability, and best practices in backend engineering.
On a typical day, you will review and annotate AI-generated code, assess outputs for logical and structural soundness, identify and document error patterns, and collaborate with our team to refine prompts, evaluation methods, and engineering guidelines.
Proficiency in backend technologies is required, including strong experience with languages such as Python, Java, Go, or C++; frameworks such as Django, Spring, or Express; and databases (SQL/NoSQL). Experience with API design, distributed systems, cloud services, or containerization (Docker/Kubernetes) is a strong plus. Clear communication skills, problem-solving ability, and attention to detail are essential.
Ready to channel your backend engineering expertise into building the AI tools of tomorrow? Apply today and help train the model that will support developers and organizations worldwide.
We offer a pay range of $8 to $65 per hour, with the exact rate determined after evaluating your experience, expertise, and geographic location. Final offer amounts may vary from the pay range listed above. As a contractor you’ll supply a secure computer and stable internet connection; company-sponsored benefits such as health insurance and PTO do not apply.
Job title: Backend Engineering Specialist – AI Trainer
Employment type: Contract
Workplace type: Remote
Seniority level: Mid-Senior
How do you apply to Invisible?
Apply on Invisible
The Apply button opens this post on Invisible's own site. You apply with them, not with Rubric. Timing: varies; several days to weeks.
Get through screening
What Invisible asks for after you apply:
- Browse open projects on Meridial
- Join the network and complete your profile, including country
- Take the skills assessment or interview for the project
- Wait to be matched and onboarded to a project team
Start work and get paid
Pay schedule: varies by project. Ask how they pay you, too. You're paid for the work they hand out, not a fixed salary.
Invisible also needs
- Expertise or language fluency matching a listed project
- Reliable internet
Red flags
- Red flagClients or projects disappearing for months with no update
- Red flagSudden project cancellations
What is Invisible like to work for?
AI training and operations company that hires freelance AI trainers through its Meridial expert network, mostly onto team-based projects.
| Advertised pay | $6–65/hr |
|---|---|
| Getting in | Some screening |
| Application takes | Varies; several days to weeks |
| How you get paid | Varies by project |
| Payout record | Pays on time |
| Countries | Each listing names the countries it accepts, some covering about 145 countries. Invisible has posted India-only roles (coding, Telugu, Tamil, Marathi, Hindi), with pay adjusted by location. |
Listings show $6–65/hr and the rate depends on your country; many entry projects pay around $15–25/hr.
