Ruby on Rails Engineer

Salary: £70,000 - 80,000 per year

Requirements:

• Strong commercial experience with Ruby on Rails in production environments
• Strong understanding of object-oriented programming and Rails architecture
• Experience building and maintaining scalable backend systems and APIs
• Strong PostgreSQL experience, including complex queries and performance optimisation
• Experience with Redis and Sidekiq for background job processing
• Experience working with REST APIs, JSON serialisation, and authentication methods such as JWT or SSO
• Experience working with AWS-based infrastructure
• Experience using Docker within development or production environments
• Experience troubleshooting and supporting live production systems
• Strong debugging and problem-solving capabilities
• Experience working within existing codebases and improving legacy functionality
• Strong communication and collaboration skills
• Experience working within Agile environments using Git/GitHub
• Experience working with SOAP/XML integrations
• Experience migrating serverless components into Rails applications
• Familiarity with Vue.js
• Experience supporting mobile applications or mobile-focused backend services
• Experience within regulated industries or operational B2B SaaS environments
• Experience improving CI/CD pipelines and deployment reliability
• Open-source contributions or technical blogging experience

Responsibilities:

• Maintain and improve Ruby on Rails applications supporting core operational processes
• Design, build, and maintain scalable backend services and APIs
• Write clean, maintainable, and well-tested code
• Support platform reliability, scalability, and long-term maintainability
• Manage and improve integrations with third-party systems and APIs
• Optimise PostgreSQL database performance and background job processing
• Support AWS-based deployments and CI/CD processes alongside Platform teams
• Investigate, troubleshoot, and resolve production issues
• Improve monitoring, observability, and deployment confidence
• Collaborate closely with frontend, mobile, and product teams
• Contribute to backend architecture improvements and technical documentation
• Support continuous improvement across engineering standards and delivery practices
• Take ownership of systems that directly support live operational environments

Technologies:

• AWS
• Backend
• CI/CD
• Docker
• Frontend
• Git
• GitHub
• Support
• JSON
• JWT
• Mobile
• PostgreSQL
• REST
• Rails
• Redis
• Ruby
• SOAP
• Serverless
• Vue
• XML
• Cloud

More:

We are a growing technology business building operational SaaS platforms used within large-scale, real-world environments. Our backend engineering team maintains and evolves systems that support live operational workflows, high-volume transactional activity, and business-critical processes. We offer a fast-paced, product-focused environment with a strong emphasis on reliability, scalability, and engineering quality. This is a London-based hybrid role, with two days per week onsite, and a salary of £65,000 to £80,000 depending on experience.

last updated 30 week of 2026