Software Engineer - Ruby

Alignerr Corp.; France; Remote; EUR 34,000 - 83,000; Full time

Job summary

Alignerr is seeking a Ruby Software Engineer to help shape AI training by reviewing and developing backend services and APIs in Ruby. This fully remote, hourly contract role involves working with researchers to design real-world coding scenarios that teach AI how production-grade software works.

Ideal candidates have 2+ years of experience, strong Ruby backend skills, and a solid understanding of APIs and data-driven systems.

Qualifications

• 2+ years of professional software engineering experience.
• Strong proficiency in Ruby and backend development in production codebases.
• Solid understanding of APIs and data-driven systems.

Responsibilities

• Develop, review, and evaluate backend services and APIs in Ruby.
• Analyze codebases for correctness and performance; explain reasoning clearly.
• Create and validate realistic AI training and evaluation scenarios.
• Assess AI-generated Ruby code for quality and production-readiness.
• Collaborate asynchronously with researchers and engineers supporting AI development.
• Complete task-based assignments independently on your schedule.

Skills

Ruby

Backend development

APIs

Async collaboration

Tools

Ruby on Rails

Job description

About The Role

What if your Ruby skills could directly influence how AI understands and writes production-grade software for developers around the world? We're looking for experienced Ruby Software Engineers to help design, evaluate, and improve the real-world coding scenarios that teach AI systems how great backend engineering actually works.

Software Engineer – Ruby (AI Training)

What if your Ruby skills could directly influence how AI understands and writes production-grade software for developers around the world? We're looking for experienced Ruby Software Engineers to help design, evaluate, and improve the real-world coding scenarios that teach AI systems how great backend engineering actually works.

This is a fully remote, flexible contract role. You'll bring your professional engineering experience to meaningful technical work — reviewing code, reasoning through system design, and helping shape AI that genuinely understands software at a production level.

• Organization: Alignerr
• Type: Hourly Contract
• Location: Remote
• Commitment: 10–40 hours/week

What You'll Do

• Develop, review, and evaluate backend services and APIs written in Ruby and Ruby-based frameworks
• Analyze existing codebases for correctness, performance, and maintainability — and clearly explain your reasoning
• Help create and validate realistic software engineering scenarios used in AI training and evaluation datasets
• Assess AI-generated Ruby code for quality, accuracy, and production-readiness
• Collaborate asynchronously with researchers and engineers supporting cutting-edge AI development
• Complete task-based assignments independently on your own schedule

Who You Are

• 2+ years of professional software engineering experience
• Strong proficiency in Ruby and backend development — you're comfortable in production codebases
• Solid understanding of APIs, data-driven systems, and software engineering best practices
• Detail-oriented and analytical — you notice what's wrong and can articulate why
• Clear written communicator who can explain technical decisions without jargon
• Comfortable working independently in an async, remote environment

Nice to Have

• Experience with Ruby on Rails or other Ruby-based frameworks
• Background in code review, technical writing, or engineering mentorship
• Familiarity with AI tools or software evaluation workflows
• Exposure to data pipelines, machine learning systems, or AI-adjacent infrastructure

Why Join Us

• Work on cutting-edge AI projects alongside leading research labs
• Fully remote and flexible — work when and where it suits you
• Freelance autonomy with the structure of meaningful, task-based engineering work
• Make a direct, tangible impact on how AI understands and generates real-world code
• Potential for ongoing work and contract extension as new projects launch