Runtime Group Ltd
Ruby on Rails Engineer - Contract
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OUTSIDE: IR35 6 Month contract
Key Skills:
- Ruby on Rails
- ML / AI
- LLMs
A Senior (Ruby on Rails) Engineer is required to join one of our clients, who are transforming the automotive space. This role provides an opportunity for an experienced Ruby on Rails Developer to join a fast-paced environment, using the latest tech in Ruby on Rails and AI tools (LLMs).
You will have deep expertise in architecting, developing, and scaling full-stack web platforms, particularly within the Ruby on Rails ecosystem. Experienced in guiding cross-disciplinary engineering teams and embedding modern engineering practices that enable reliable, high-velocity delivery. Adept at introducing and operationalising emerging technologies, including LLMs and AI-driven tooling, to create meaningful product and commercial impact.
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If you have experience being a Senior Ruby on Rails Engineer working closely with team sizes from 5-15 (onshore / offshore) and want to work with the latest innovations in ML and AI, please get in touch.
Key requirements:
- 7 years of Ruby & Ruby on Rails
- AI & LLMs: API integration, prompt engineering, AI-enhanced features and developer tooling
- Full-Stack Engineering: JavaScript, TypeScript, React, Hotwire, Stimulus
- Node.js & React exposure beneficial
- API Design: REST, GraphQL, external integrations
- Data Stores: PostgreSQL, MySQL, Redis, Elasticsearch
- Async Processing: Sidekiq, Resque
- Cloud & DevOps: AWS, Heroku, Docker, CI/CD pipelines, IaC
- Testing & Quality: RSpec, Capybara, TDD methodologies
- Security, performance tuning, and system hardening
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Responsibilities:
- Owns end-to-end system architecture, ensuring solutions are scalable, maintainable, and delivered at pace.
- Partners closely with Product, Design, and Commercial teams to convert business objectives into robust technical plans.
- Drives engineering excellence through best practices, continuous improvement, and sustainable delivery processes.
- Led the build-out and ongoing evolution of high-traffic Ruby on Rails platforms supporting significant commercial throughput.
- Modernised legacy systems while ensuring uninterrupted business operations.
- Collaborated with stakeholders across pricing, quoting, and customer lifecycle domains to deliver impactful product improvements.
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