MRJ Recruitment
Ruby on Rails Developer
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Ruby on Rails Developer
Ruby Engineer – Build with Purpose, Solve Complex Problems
Remote-first (UK-based – ideally North West for occasional meetups)
Technical Requirements:
- Ruby on Rails
- PostgreSQL
- AWS
- GraphQL
- Docker
- CI/CD
About the Role
Looking for more than just shipping features?
This is your chance to work on a modern, growing platform where code quality, scalability, and purpose all matter.
We’re working with one of the UK’s most exciting SaaS companies, they’re growing fast, staying humble, and quietly transforming their sector with powerful, thoughtful-built tech.
As a Ruby Developer, you’ll be joining a collaborative, curious, and experienced team, helping to:
- Scale a product that solves real-world problems for thousands of users.
- Address challenges through clean code, maintainability, and smart design decisions.
Responsibilities
As a backend engineer, you'll contribute across the full development lifecycle with these key focuses:
- Writing clean, idiomatic Ruby code (Rails-based) with strong architectural thinking.
- Applying deep knowledge of:
- Ruby method lookup
- modules (
include,prepend,extend) - metaprogramming principles
- Designing scalable, performant systems prioritising composition over inheritance where appropriate.
- Supporting decisions around business logic placement in Rails (models, services, concerns):
- Validations
- Callbacks
- Modular structure
- Leading on writing and maintaining unit and integration tests (with RSpec knowledge).
- Optimising code and database performance (e.g. indexing, eager loading, partitioning).
- Participating in pair programming, peer reviews, and collaboration with product and design teams.
- Evolving system architecture with SOLID principles, where microservices are considered appropriate.
- Engaging with CI/CD pipelines, infrastructure work (AWS, Docker, Terraform), and occasional tricky production debugging.
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Requirements
We’re seeking Ruby Engineers who bring commercial experience (writing Rails in production) along with:
- Solid grasp of object-oriented design, method lookup, and module usage in Ruby.
- Proficiency in testing strategies:
- Differentiating between unit vs integration tests.
- Experience with:
- CI/CD
- Git
- Agile methodologies in a structured product team.
- Familiarity with cloud-native tools (preferably AWS) and containerised development.
- A committed interest in:
- Improving code quality
- Optimising performance
- Maintaining scalability
- A preference for readability/clarity over complexity in system design.
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Why Join?
- Remote-first setup with flexible working, including monthly in-person meetups in Manchester.
- Supportive team culture with no egos, minimal burnout, and continuous learning.
- Opportunity to work on a rapidly growing platform with real-world impact.
- Focus on clean code, shared ownership, and engineering excellence.
- Collaboration with peers who genuinely care about:
- Design
- Test coverage
- The craft of software development.
If you’re chasing deeper impact as a Ruby Developer, this may be a perfect fit.
Interested? Drop us a message or apply to explore further.
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Jessica, London
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