Freelance Software Developer (Ruby) - Quality Assurance (AI Trainer)

Mindrift; United Kingdom; Remote; GBP 80,000 - 100,000; Part time

Job summary

A leading tech company in the UK is seeking a Freelance Software Developer specializing in Ruby. In this remote role, you will collaborate on advanced AI projects and contribute to code generation and review. Ideal candidates will have at least 3 years of Ruby experience, familiarity with testing frameworks, and advanced English proficiency. This opportunity allows for flexibility and aligns with your professional commitments.

Benefits

Flexible schedule

Experience with advanced AI projects

Opportunity to enhance portfolio

Qualifications

• At least 3 years of professional experience with Ruby and testing frameworks.
• Hands-on experience with AI/ML or LLM-powered solutions in Ruby projects.
• Ability to learn new methods and adapt quickly to complex guidelines.

Responsibilities

• Code generation and code review.
• Prompt evaluation and complex data annotation.
• Training and evaluation of large language models.

Skills

Ruby

AI/ML integration

Code review

Advanced English (C1)

Education

Bachelor's in Software Development or Computer Science

Tools

RSpec

Minitest

Capybara

Job description

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Freelance Software Developer (Ruby) - Quality Assurance (AI Trainer)

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Client:

Location:

United Kingdom

Job Category:

Other

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EU work permit required:

Yes

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Job Reference:

1c52bf4067f7

Job Views:

7

Posted:

12.08.2025

Expiry Date:

26.09.2025

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Job Description:

This opportunity is only for candidates currently residing in the specified country. Your location may affect eligibility and rates.

At Mindrift, innovation meets opportunity. We believe in using the power of collective intelligence to ethically shape the future of AI.

What we do

The Mindrift platform connects specialists with AI projects from major tech innovators. Our mission is to unlock the potential of Generative AI by tapping into real-world expertise from across the globe.

About the Role

GenAI models are improving very quickly, and one of our goals is to make them capable of addressing specialized questions and achieving complex reasoning skills. If you join the platform as an AI Tutor in Coding, you’ll have the opportunity to collaborate on these projects.

Although every project is unique, you might typically:

• Code generation and code review
• Prompt evaluation and complex data annotation
• Training and evaluation of large language models
• Benchmarking and agent-based code execution in sandboxed environments
• Adapting guidelines for new domains and use cases
• Collaborating with project leads, solution engineers, and supply managers on complex or experimental projects

How to get started

Simply apply to this post, qualify, and get the chance to contribute to projects aligned with your skills, on your own schedule. From creating training prompts to refining model responses, you’ll help shape the future of AI while ensuring technology benefits everyone.

Requirements

• You have a Bachelor's in Software Development, Computer Science, or other related fields.
• You have at least 3 years of professional experience with Ruby, hands-on experience with Ruby testing frameworks (RSpec, Minitest, Capybara) and automation tools
• Experience using, integrating, or tutoring others with AI/ML or LLM-powered testing/coding solutions in Ruby projects.
• Code review experience is a must.
• Hackathon or competitive coding experience is a plus.
• Your level of English is advanced (C1) or above.
• You are ready to learn new methods, able to switch between tasks and topics quickly and sometimes work with challenging, complex guidelines.
• Our freelance role is fully remote so, you just need a laptop, internet connection, time available and enthusiasm to take on a challenge.

Why this freelance opportunity might be a great fit for you?

• Take part in a part-time, remote, freelance project that fits around your primary professional or academic commitments.
• Work on advanced AI projects and gain valuable experience that enhances your portfolio.
• Influence how future AI models understand and communicate in your field of expertise.