Senior Ruby Engineer

Run-time Group Ltd
Mitcham, United Kingdom
yesterday

Role details

Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Working hours
Regular working hours
Languages
English
Experience level
Senior
Compensation
£ 100K

Job location

Mitcham, United Kingdom

Tech stack

JavaScript
API
Artificial Intelligence
Amazon Web Services (AWS)
Cloud Computing
Code Review
Continuous Integration
Data Stores
DevOps
Programming Tools
Elasticsearch
PostgreSQL
MySQL
Node.js
Performance Tuning
Ruby on Rails
Redis
Ruby
Systems Architecture
TypeScript
Web Platforms
Capybara
Test Driven Development
React
RSpec
Large Language Models
Prompt Engineering
Heroku
Infrastructure Automation Frameworks
GraphQL
Api Design
Docker
Legacy Systems

Job description

  • We provide hands-on technical leadership to engineering teams of 5 to 15 people, including mentoring, code review, and architectural direction.
  • We own end-to-end system architecture and ensure solutions are scalable, maintainable, and delivered at pace.
  • We partner closely with Product, Design, and Commercial teams to convert business objectives into robust technical plans.
  • We drive engineering excellence through best practices, continuous improvement, and sustainable delivery processes.
  • We lead the build-out and ongoing evolution of high-traffic Ruby on Rails platforms supporting significant commercial throughput.
  • We modernise legacy systems while ensuring uninterrupted business operations.
  • We introduce AI-powered enhancements to improve customer journeys and internal operational efficiency.
  • We collaborate with stakeholders across pricing, quoting, and customer lifecycle domains to deliver impactful product improvements.
  • We help shape technical direction that supports business strategy and future leadership growth, including progression toward a VP of Engineering position.

Technologies:

  • AI
  • API
  • AWS
  • CI/CD
  • Cloud
  • DevOps
  • Docker
  • ElasticSearch
  • GraphQL
  • Heroku
  • Support
  • JavaScript
  • MySQL
  • PostgreSQL
  • REST
  • RSpec
  • Rails
  • React
  • Redis
  • Ruby
  • Security
  • TDD
  • TypeScript
  • Web
  • NodeJS

Requirements

  • We require deep expertise in architecting, developing, and scaling full-stack web platforms, particularly within the Ruby on Rails ecosystem.
  • We require strong experience with Ruby and Ruby on Rails, plus full-stack engineering skills including JavaScript, TypeScript, React, Hotwire, and Stimulus.
  • We value exposure to Node.js and React.
  • We require experience in API design, including REST, GraphQL, and external integrations.
  • We require experience with data stores such as PostgreSQL, MySQL, Redis, and Elasticsearch.
  • We require experience with asynchronous processing tools such as Sidekiq and Resque.
  • We require cloud and DevOps experience, including AWS, Heroku, Docker, CI/CD pipelines, and infrastructure as code.
  • We require strong testing and quality engineering experience, including RSpec, Capybara, and TDD methodologies.
  • We require experience in security, performance tuning, and system hardening.
  • We require experience introducing and operationalising emerging technologies, including LLMs and AI-driven tooling.
  • We require the ability to use AI and LLMs for API integration, prompt engineering, AI-enhanced features, and developer tooling.
  • We require experience guiding cross-disciplinary engineering teams and embedding modern engineering practices for reliable, high-velocity delivery.
  • We require a decisive, action-oriented approach and the ability to align technical direction with business strategy in fast-moving, product-centric environments.

About the company

We are transforming the automotive space and are looking for a Senior Technical Lead (Ruby on Rails) to join us in a high-impact role with a clear opportunity to step into a VP of Engineering position within a year. We offer the chance to work on high-traffic, commercially important platforms, modernise legacy systems, and introduce AI-driven capabilities that create meaningful product and commercial impact. You will work closely with cross-functional teams in a fast-moving, product-centric environment, helping us deliver reliable, scalable solutions that support business growth.

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