AI Engineer - Ruby on Rails
We are looking for an engineer with practical AI/LLM experience who can build production features in Ruby on Rails.
This role is for someone who has worked with AI tools, LLM APIs, prompts, retrieval/context patterns, or AI-assisted workflows - and who also has the engineering depth to turn those ideas into reliable, tested, maintainable software.
What you’ll be working on:
- Designing and building AI/LLM-assisted product features
- Integrating LLM APIs into Ruby on Rails systems
- Combining AI approaches with business logic, tests, fallbacks, and production safeguards
- Owning features from technical design to production
- Improving reliability, accuracy, consistency, latency, cost, security, and maintainability
- Writing and maintaining automated tests, including unit, integration, and E2E tests
- Debugging production issues and improving system behavior over time
What we’re looking for:
To succeed in this role, you’ll have:
- Practical experience building with AI/LLM technologies, not just using AI tools casually
- Strong Ruby on Rails experience, ideally at a senior level
- Good judgment about when AI is useful and when simpler engineering is better
- Strong backend skills, including databases, API design, performance, background jobs, and security
- Ability to break down ambiguous problems into clear technical solutions
Nice to have
- CI/CD, background jobs, or AWS experience
- Experience with text-processing, localization, translation, or multilingual products
Why Join OTGS?
- Stable & self-funded: Founded in 2007, profitable, and independent.
- Industry leaders: Creators of WPML, the #1 multilingual plugin for WordPress, used on 1.5M+ sites
- Fully remote, async-friendly: Work from anywhere within EMEA hours
- Engineering-driven culture: Ownership, autonomy, testing, and thoughtful problem-solving
- Fair compensation and great benefits: Designed to support your well-being both inside and outside of work.
Want to make a lasting impact on a product used by thousands of real customers? We would love to hear from you.
Skills Required
- Practical experience building with AI/LLM technologies (LLM APIs, prompt engineering, retrieval/context patterns)
- Strong Ruby on Rails experience (ideally senior-level)
- Strong backend skills including databases, API design, performance, background jobs, and security
- Ability to evaluate when AI is appropriate versus simpler engineering
- Experience writing and maintaining automated tests (unit, integration, E2E)
- Ability to break down ambiguous problems into clear technical solutions
- CI/CD, background jobs, or AWS experience
- Experience with text-processing, localization, translation, or multilingual products
What We Do
OnTheGoSystems is a fully remote software development company specializing in localization and translation tools, including the popular WordPress plugins WPML and Toolset. The company harnesses AI, machine learning, and algorithms to create affordable, cutting-edge tools that help businesses of all sizes go global. Operating as a multilingual and multicultural team, it focuses on providing intuitive solutions for developers and website owners without relying on external investors.
