Backend Engineering Specialist - Freelance AI Trainer Project
About the role
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
Where you can work
This role is 100% remote, for applicants located in United States.
From Invisible's job posting, checked Oct 17, 2026.
The application
Your details, CV and LinkedIn, then 2 questions.
- 1.What country are you currently a resident of?Pick one (198 options)
- 2.If you are currently based in United States, please confirm your current state of residence. If you are based outside of the United States, select "I am not located in the United States".Pick one (56 options)
From Invisible's apply page, checked Oct 9, 2026.
About Invisible
Freelance AI-trainer projects, pay stated per project.
How it pays: Independent contractor; paid every two weeks for time on projects (Meridial FAQ).
Similar open roles
Some links on AITraining.jobs are referral links. If you sign up through one, AITraining.jobs may earn a commission at no extra cost to you. It never changes what a platform pays you.
$30–$100/hr- $30–$100/hr
$50–$80/hr
$8–$65/hr- $50–$100/hr
An experienced engineer?
One profile for every AI training platform. Companies ask us for people with a specific language, country or credential: add yours once, and when a role fits, we introduce you, only with your yes. Free.
Get new Invisible roles by email
We check the Invisible job board daily and email you its newest roles each week, plus similar paid roles elsewhere. Free, unsubscribe anytime.