Freelance Software Developer (Ruby) - AI Trainer

Mindrift

Johannesburg

Remote

ZAR 457,598 - 549,118

Part time

14 days+

Get more replies from employers

Send a job-specific resume in minutes.

Benefits offered by this job

Flexible working hours

Remote work

Competitive pay up to $24/hour

Valuable AI project experience

Job summary

A leading AI consultancy based in Johannesburg is seeking a Freelance Software Developer (Ruby) to work on innovative AI projects. This remote, part-time role involves designing prompt strategies, collaborating with engineers, and improving AI reliability. Suitable candidates should have at least a Bachelor's degree in Software Development and 3+ years of experience in Ruby and DevOps tools. This opportunity offers competitive rates and the chance to influence future AI models.

Qualifications

3+ years of professional experience in software development.
Excellent command of Ruby and key ecosystem tools.
Hands-on experience with containerisation and CI/CD pipelines.

Responsibilities

Design prompt variations to surface edge behaviors and performance regressions.
Collaborate with engineers to align prompts with project constraints.
Document prompt patterns and known limitations to support reuse.

Skills

Ruby

Git

Linux CLI tools

Docker

CI/CD

TDD

Debugging

Profiling

Code optimisation

English (C1)

Education

Bachelor’s or Master’s Degree in Software Development or Computer Science

Tools

RSpec

Bundler

Job description

Freelance Software Developer (Ruby) – AI Trainer

1 day ago – Be among the first 25 applicants

This opportunity is only for candidates currently residing in the specified country. Your location may affect eligibility and rates. Please submit your resume in English and indicate your level of English proficiency.

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:

Design prompt variations and evaluation cases to surface edge behaviours, failure modes, and performance regressions.
Collaborate with engineers to align prompts with project constraints, APIs, and CI/CD workflows.
Iterate on prompt strategies using test results and human feedback to improve reliability and reduce hallucinations.
Document prompt patterns, expected outputs, and known limitations to support reuse and hand‑offs.

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

Bachelor’s or Master’s Degree in Software Development, Computer Science, or other related fields.
3+ years of professional experience, excellent command of Ruby and key ecosystem tools (RSpec, Bundler).
Confident use of Git and standard Linux CLI tools.
Hands‑on experience with containerisation (Docker) and CI/CD pipelines (e.g., GitHub Actions, GitLab CI, Jenkins).
Deep understanding of testing principles and test‑driven development (TDD); strong skills in debugging, profiling, and code optimisation.
Level of English is advanced (C1) or above.

Desirable

Contributions to open‑source Ruby projects (pull requests, code reviews, issue tracking).
Experience working with large monorepositories or major open‑source projects (specify if public open‑source experience is required).
Experience with automated benchmarking, scripting, or infrastructure‑as‑code tools.
Experience working with AI‑generated code or in code evaluation projects.

Soft Skills

Analytical and detail‑oriented mindset: proactively identifies bugs, edge cases, and test coverage gaps.
Concise and structured communication, both in documentation and asynchronous team discussions.
Strong ownership: able to drive tasks end‑to‑end, propose improvements, and promptly flag risks or blockers.
Adaptability and resilience: thrives in fast‑changing requirements and ambiguous project contexts.
Team player: open to code reviews, feedback, and knowledge sharing.

Our freelance role is fully remote so you just need a laptop, internet connection, time available, and enthusiasm to take on a challenge.

Benefits

Get paid for your expertise, with rates that can go up to $24/hour depending on your skills, experience, and project needs.
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.

Seniority Level