Ruby on Rails Developer

Darwin Recruitment; Greater London; Hybrid; GBP 60,000 - 90,000; Full time

Job summary

Darwin Recruitment is partnering with a UK public sector organisation to hire a Ruby on Rails Developer in London. The role is hybrid, offering 80% remote work with 1 day per week on site in London.

You will develop features on established Rails applications and help modernise services while ensuring accessibility and security in line with the Service Standard. The contract is 12 months (extendable to 36 months) inside IR-35, with UK-based eligibility and BPSS checks.

Qualifications

• Strong commercial Ruby on Rails development experience (Rails 7+).
• TDD with RSpec or Minitest; Capybara for feature tests is a plus.
• PostgreSQL, ActiveRecord and data modelling incl. migrations from legacy sources.
• Building and consuming RESTful APIs and integrations.

Responsibilities

• Develop new features on Ruby on Rails applications.
• Migrate data and functionality from legacy systems.
• Deliver accessible, secure services in line with the gov Service Standard.
• Work in an agile, multidisciplinary team and participate in discovery to live phases.

Skills

Ruby on Rails

Test-driven development

RESTful APIs

Data modelling

CI/CD

Agile delivery

Tools

Docker

Kubernetes

Git

AWS

Job description

Job title – Ruby on Rails Developer

Client Location – London, United Kingdom

Remote work offering – 80% (hybrid, 1 day per week on site in London)

Client Industry – UK Public Sector

Contract Length – 12 months (extendable up to 36 months)

Contract type – Inside IR-35

Project focus

Join a multidisciplinary agile team building and modernising citizen-facing digital services for a UK public sector organisation. You’ll develop new features on established Ruby on Rails applications, help migrate data and functionality away from legacy systems, and deliver accessible, secure services in line with the government Service Standard.

Key skills and Experience required

• Strong commercial Ruby and Ruby on Rails development experience, ideally on Rails 7 or later
• Test-driven development with RSpec or Minitest (Capybara for feature tests)
• PostgreSQL, ActiveRecord and data modelling, including migrations from legacy data sources
• Building and consuming RESTful APIs and integrations
• Server-rendered front ends with HTML, CSS and JavaScript (Hotwire / Stimulus a plus)
• Accessible design to WCAG 2.2 AA; GOV.UK Design System experience highly desirable
• CI/CD, Git and containerised deployments (Docker, Kubernetes) on AWS or Azure
• Delivery in agile, multidisciplinary teams through discovery, alpha, beta and live phases
• UK public sector / government digital delivery experience strongly preferred
• Must be UK based with the right to work and able to pass BPSS checks