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How much do freelance professional engineer jobs pay per hour?

As of Jun 13, 2026, the average hourly pay for freelance professional engineer in the United States is $47.71, according to ZipRecruiter salary data. Most workers in this role earn between $24.28 and $61.78 per hour, depending on experience, location, and employer.
Infographic showing various Freelance Professional Engineer job openings in the United States as of June 2026, with employment types broken down into 100% Full Time. Highlights an 87% Physical, 5% Hybrid, and 8% Remote job distribution, with an average salary of $99,230 per year, or $47.7 per hour.

Ophthalmologists (Freelance - Remote) - Philadelphia, US

Prolific Academic Ltd

Philadelphia, PA • Remote

$200/hr

Full-time

Posted 8 days ago

Job description

Ophthalmologists (Freelance - Remote)About Prolific

Prolific is not just another player in the AI space – we are building the biggest pool of quality human data in the world.

Over 35,000 AI developers, researchers, and organizations use Prolific to gather data from paid study participants with a wide variety of experiences, knowledge, and skills.

The role

We are seeking qualified Ophthalmologists to support a high-impact AI development project focused on medical image interpretation and clinical accuracy. As AI models become increasingly capable of analyzing complex medical data, we need experienced specialists to help ensure their outputs meet the highest standards of quality and reliability.

This is a flexible, remote opportunity paying approximately $200 per hour. Your expertise will directly contribute to the development of advanced AI systems used in healthcare and medical research.

To qualify for this project, you will be required to complete a short paid skills assessment as part of the screening process. The assessment is compensated at a rate of $48 per hour and typically takes no more than 5 minutes to complete.

What you'll bring
  • Verified status as a qualified Ophthalmologist with relevant professional credentials
  • Experience reviewing, interpreting, and analysing clinical imaging and diagnostic data as part of routine practice
  • Strong attention to detail and the ability to assess complex medical information accurately
  • A reliable, fast internet connection and access to a computer
  • A PayPal account to receive payments from our clients
What you'll be doing in the role
  • Reviewing and evaluating medical images using your professional expertise
  • Reviewing and verifying AI-generated interpretations of medical images
  • Correcting inaccuracies and providing expert feedback on AI-generated responses
  • Evaluating the quality, accuracy, and clinical relevance of model outputs
  • Helping improve the performance of next-generation AI systems used in medical applications
Why Prolific is a great platform to join as a Participant

Joining our platform as a Prolific participant will give you the chance to influence the AI models of the future using professional legal expertise. Once you pass our assessment, you can join Prolific in just 15 minutes, and start enjoying competitive pay rates, flexible hours, and the ability to work from home.

We've built a unique platform that connects researchers and companies with a global pool of participants, enabling the collection of high-quality, ethically sourced human behavioural data and feedback. This data is the cornerstone of developing more accurate, nuanced, and aligned AI systems.

We believe that the next leap in AI capabilities won't come solely from scaling existing models, but from integrating diverse human perspectives and behaviours into AI development. By providing this crucial human data infrastructure, Prolific is positioning itself at the forefront of the next wave of AI innovation – one that reflects the breadth and the best of humanity.

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Privacy Statement

By submitting your application, you agree that Prolific may collect your personal data for recruiting and global organisation planning. Prolific's Candidate Privacy Notice explains what personal information Prolific may process, where Prolific may process your personal information, its purposes for processing your personal information, and the rights you can exercise over Prolific use of your personal personal information.