Senior Ruby on Rails Developer

KE Technology; Greater London; Remote; GBP 85,000; Full time

Job summary

An innovative company is seeking a Senior Ruby Developer to tackle exciting engineering challenges in a dynamic environment. You will be responsible for developing and optimizing high-traffic backend systems, ensuring performance and scalability while working with a modern tech stack. This role offers the chance to influence technical decisions and contribute to architectural improvements, all while enjoying flexible remote work options. If you are passionate about solving complex problems and enhancing system performance, this opportunity is perfect for you.

Benefits

Stock options

Flexible remote working

Work on high-scale backend systems

Qualifications

• 4+ years experience in Ruby on Rails development.
• Strong knowledge of SQL and performance tuning.

Responsibilities

• Develop and optimize scalable backend systems using Ruby on Rails.
• Design and maintain APIs and integrations for high-scale applications.

Skills

Ruby on Rails

SQL databases

Performance tuning

Caching strategies

CI/CD

Docker

Cloud services (AWS preferred)

Tools

PostgreSQL

Redis

Sidekiq

Kubernetes

Job description

Direct message the job poster from KE Technology

Director - Ruby Specialist at KE Technology

Ruby Developer - Remote (UK-based) - Up to £85K

Are you a Senior Ruby on Rails Developer looking to work on scalable, high-traffic applications in a modern, engineering-led environment? We’re growing rapidly and need engineers who can build, optimise, and scale backend systems while maintaining clean, maintainable code.

Join a team that values best practices, automation, and performance, working on a platform that’s continuously evolving to meet increasing demand.

What We Offer:

• Up to £85,000 + stock options
• Flexible remote working (UK based) with a London HQ
• Work on high-scale backend systems that process large volumes of data
• Modern tech stack: Ruby on Rails, PostgreSQL, Redis, Sidekiq, AWS, Docker, Kubernetes
• Opportunity to influence technical decisions & contribute to architectural improvements

Key Responsibilities:

• Developing & optimising scalable backend systems in Ruby on Rails
• Designing, building, and maintaining APIs & integrations
• Improving performance & database efficiency for high-scale applications
• Enhancing existing systems for better performance, scalability, and maintainability
• Working closely with DevOps & product teams to ensure reliability & resilience

What We’re Looking For:

• 4+ years experience with Ruby on Rails
• Strong knowledge of SQL databases
• Understanding of performance tuning & caching strategies
• Comfortable with CI/CD, Docker, and cloud services (AWS preferred)

Why Join Us? This is an opportunity to work on meaningful engineering challenges - scaling, optimising, and improving a growing platform. If you enjoy solving technical problems, improving performance, and working in a modern Ruby environment, we’d love to hear from you.

Seniority level

Mid-Senior level

Employment type

Full-time

Job function

Information Technology

Industries

Staffing and Recruiting