Remote Freelance Software Developer (Ruby)

Salary: £63,000 - 103,000 per year

Requirements

• We hold a Bachelors Degree in Software Development, Computer Science, or a related field.
• We have at least 3 years of professional experience with Ruby, including strong knowledge of object-oriented programming, metaprogramming, and idiomatic Ruby practices.
• We have an advanced level of English (C1) or above.
• We are proficient in code review, quality analysis, and identifying and fixing code smells, anti-patterns, and test gaps in Ruby codebases.
• We have experience with test integration in CI/CD environments such as GitHub Actions, GitLab CI, Jenkins, or CircleCI.
• We are comfortable with standard version control workflows using Git and Linux CLI tools.
• We have experience using, integrating, or tutoring others with AI/ML or LLM-powered testing and coding solutions in Ruby projects.
• We are familiar with containerization technologies such as Docker, automated deployment, and scripting within Ruby environments.
• We have strong skills in defect documentation, profiling, and debugging Ruby applications.
• We have experience generating and maintaining high-quality documentation for tests, bugs, and technical debt.
• Hackathon or competitive coding experience is a plus.
• We are ready to learn new methods, switch between tasks and topics quickly, and work with challenging, complex guidelines.
• We have a laptop, internet connection, and time available for fully remote freelance work.

Responsibilities

• We work on code generation and code review.
• We evaluate prompts and perform complex data annotation.
• We train and evaluate large language models.
• We benchmark and run agent-based code execution in sandboxed environments.
• We work across multiple programming languages, including Python, JavaScript/TypeScript, Rust, and SQL.
• We adapt guidelines for new domains and use cases.
• We collaborate with project leads, solution engineers, and supply managers on complex or experimental projects.
• We create training prompts and refine model responses.

Technologies

• AI
• CI/CD
• Docker
• Git
• GitHub
• GitLab
• JavaScript
• Jenkins
• LLM
• Linux
• Python
• Ruby
• Rust
• SQL
• TypeScript

More

We are Mindrift, where innovation meets opportunity, and we use collective intelligence to ethically shape the future of AI. Our platform connects specialists with AI projects from major tech innovators, helping unlock the potential of Generative AI through real-world expertise from across the globe. This is a fully remote freelance opportunity for candidates currently residing in the specified country, with part-time flexibility that can fit around primary professional or academic commitments. We offer the chance to contribute on your own schedule, work on advanced AI projects, build your portfolio, and earn rates that can go up to $44/hour depending on skills, experience, and project needs.

last updated 28 week of 2026