Senior Ruby Developer

Senior Ruby on Rails Developer

The Company

We are working with a fast-growing, well-invested SaaS company that has been helping organisations manage information security and regulatory compliance since 2005. Its platform is used by more than 65,000 people across the UK, Europe, the US and APAC.

The business is scaling quickly and is building a team that cares about delivering compliance technology properly, with a focus on strong engineering, practical process and scalable product development.

The Role

They are hiring a Senior Ruby on Rails Developer to join their backend engineering team.

This is a senior individual contributor role with leadership expectations. You will work closely with the Tech Lead to deliver roadmap work, improve architecture where needed and help shape how AI is used across engineering in a practical, measurable way.

The role suits someone who is comfortable working in a mature Rails monolith, can move between legacy and modern patterns without drama and is motivated by making a real contribution in a small, capable team.

What you will be doing

• Build and maintain product features in Ruby on Rails
• Contribute to architecture decisions and help evolve the platform over time
• Work confidently across legacy and modern parts of the application
• Improve performance, maintainability and developer productivity
• Support the team with code review, pairing, technical planning and mentoring
• Help define and improve AI-augmented engineering workflows
• Contribute ideas, not just delivery

The Stack

Current technology includes:

• Rails 8.1, Ruby 4.x and MySQL 8
• GitHub Actions, Cypress, Turbo and StimulusJS
• dry-rb libraries, Action Policy, RailsEventStore and DelayJob
• New Relic, JIRA and Confluence

Areas of technical direction include:

• ERB moving toward Phlex
• Solr moving toward ElasticSearch / OpenSearch
• Component separation via Packwerk
• AI-augmented workflows across engineering

AI and Engineering

This company is serious about using AI to improve speed, quality and leverage across engineering. This is not treated as a nice-to-have.

They are looking for someone who already uses AI regularly in engineering work, including coding, refactoring, testing, documentation and workflow improvement.

This could include practical use of tools such as:

• OpenAI Codex
• Claude Code
• GitHub Copilot
• Similar AI engineering tools

You should understand where AI can improve delivery and productivity, but also where strong engineering judgement is still essential.

What They Are Looking For

Must-haves:

• 5+ years of relevant Ruby on Rails experience
• Strong Ruby fundamentals and sound object-oriented design
• Experience working effectively in a mature monolith codebase
• Strong SQL skills, with confidence writing and understanding queries
• Testing experience across unit, integration and end-to-end levels
• Experience contributing to architecture and technical direction
• High autonomy, initiative and product awareness
• Daily, practical use of AI coding tools
• Strong written and verbal communication

Nice-to-haves:

• Stimulus, Turbo or Hotwire experience
• Event-driven architecture experience
• Familiarity with security and compliance domains
• Familiarity with ISO 27001 or similar standards
• Experience with agentic workflows, automation design or evals
• Personal projects demonstrating thoughtful AI use

Why Apply?

This is a great opportunity to join a growing, well-invested SaaS business where the role has real scope, responsibility and influence.

You will be joining a small engineering organisation that values people who can contribute beyond the ticket in front of them, collaborate well and help improve how engineering works.

The business has strong processes in place, including backlog reviews, product workshops, technical workshops, sprint planning, demos and retrospectives, without being overly bureaucratic.

This is a remote UK role with a focus on output, ownership and meaningful technical contribution.