Lead Full-Stack Ruby / React Engineer
Location: Remote UK or Belfast Hybrid
Salary: Competitive + Benefits
We’re working with a fast-growing technology organisation building modern, large-scale web platforms used by customers globally. This is an opportunity to join a highly collaborative engineering team working across distributed systems, modern APIs, scalable backend services and complex web applications.
This role is ideal for a senior engineer who enjoys solving difficult technical problems, working across backend-heavy architectures and contributing to product direction in a fast-moving environment.
Important clarification:
This is a Lead Individual Contributor role. It is not a people-management or formal Tech Lead position. The successful candidate will remain hands-on and deeply technical while contributing at a senior level across architecture, systems design and engineering best practices.
Responsibilities
• Build and scale backend services within complex distributed systems
• Develop modern web applications using React and Ruby on Rails
• Design and maintain GraphQL and REST API integrations across services
• Work with PostgreSQL databases and optimise Rails applications at scale
• Contribute to resilient, event-driven architectures using Kafka and Redis
• Improve API performance, reliability and system scalability
• Collaborate closely with Product, Design and Engineering teams across web and mobile • Participate in code reviews, GitHub workflows and engineering best practices
• Work within AI-assisted development environments and modern engineering workflows
• Contribute to architectural discussions and technical decision-making across the platform
What We’re Looking For
• 7+ years of professional software engineering experience
• Strong backend engineering experience within large-scale or complex environments
• Extensive experience with Ruby on Rails and PostgreSQL
• Strong frontend development experience with React
• Strong experience building GraphQL APIs including Apollo and schema design
• Experience working with REST APIs and service-to-service integrations
• Experience with Kafka, Redis and distributed systems architecture
• Strong understanding of scalable, resilient platform design
• Experience optimising APIs and modern web application performance
• Strong Git workflows and GitHub pull request review experience
• Excellent communication and collaboration skills
• Ability to work autonomously and manage complex technical workstreams
Nice to Have
• Experience with CircleCI or similar CI/CD tooling
• Experience with Datadog or similar observability platforms
• Experience with Bugsnag or similar error monitoring tools
• Experience working with feature flags or gated feature deployments
• Exposure to AI-assisted engineering workflows and multi-agent tooling
What’s on Offer
• Fully remote or hybrid flexibility
• Opportunity to work on modern, large-scale engineering challenges
• Strong engineering culture with highly collaborative teams
• High-impact role within a growing technology organisation
• Long-term progression and technical ownership opportunities