Software Engineer - Ruby

Alignerr Corp.; España; Remote; EUR 34,000 - 55,000; Part time

Job summary

Alignerr is seeking a skilled Ruby Software Engineer to design, implement, and optimize backend services and APIs in a fully remote, hourly contract role. You will work on AI training data pipelines and production-grade code, collaborating asynchronously with researchers and engineers across time zones.

The position emphasizes strong Ruby expertise, experience with RESTful APIs, and the ability to work independently on complex backend challenges while delivering high-quality software on a

Qualifications

• 2+ years of professional software engineering experience.
• Strong proficiency in Ruby and backend development concepts.
• comfortable working with production codebases, RESTful APIs, and data-driven systems.

Responsibilities

• Develop and maintain backend services and APIs using Ruby and Ruby-based frameworks.
• Review, analyze, and improve existing codebases for correctness, performance, and maintainability.
• Evaluate realistic software engineering scenarios to help create and validate high-quality technical datasets.
• Collaborate asynchronously with researchers and engineers to support AI training and evaluation efforts.
• Apply production-grade engineering thinking to real-world backend and API problems.

Skills

Ruby

Backend development

RESTful APIs

Data-driven systems

Independent work

Tools

Ruby on Rails

Job description

Software Engineer – Ruby (AI Training)

About The Role

What if your Ruby expertise 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 real-world software systems used in AI training and data-driven workflows. This is a fully remote, flexible contract role built for working engineers who want to do meaningful, high-impact work on their own schedule — no office, no commute, no rigid hours.

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

What You'll Do

• Develop and maintain backend services and APIs using Ruby and Ruby-based frameworks
• Review, analyze, and improve existing codebases for correctness, performance, and maintainability
• Evaluate realistic software engineering scenarios to help create and validate high-quality technical datasets
• Collaborate asynchronously with researchers and engineers to support AI training and evaluation efforts
• Apply production-grade engineering thinking to real-world backend and API problems

Who You Are

• 2+ years of professional software engineering experience
• Strong proficiency in Ruby and backend development concepts
• Comfortable working with production codebases, RESTful APIs, and data-driven systems
• Detail-oriented and analytical — you can clearly explain your technical decisions in writing
• Self-motivated and dependable when working independently without close supervision

Nice to Have

• Experience with Ruby on Rails or other Ruby-based frameworks
• Familiarity with AI tools, data pipelines, or technical evaluation workflows
• Background in code review, system design, or software architecture
• Exposure to testing frameworks, debugging practices, or performance profiling

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 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