Ruby on Rails Developer

FRESH.; Greater London; On-site; GBP 58,000 - 98,000; Full time

Job summary

FRESH. in London is seeking a Senior Developer to strengthen the core backend of our Passenger Assistance platform, helping us scale customer onboardings faster and reduce backend bottlenecks in feature delivery.

The role offers a hybrid setup based in London with opportunities to step into technical leadership within a fast-growing B2B SaaS environment that delivers real-time insights for travellers needing assistance.

Qualifications

• Strong commercial experience with Ruby on Rails in production environments.
• Solid understanding of Rails monolith architecture and full-stack troubleshooting.
• Experience building and maintaining RESTful APIs.
• Strong knowledge of PostgreSQL, Redis and Sidekiq.
• Comfortable working with AWS infrastructure.
• Experience using Docker in development or production environments.

Responsibilities

• Own technical direction and architecture decisions within our Rails application.
• Design, build, and maintain scalable backend services and RESTful APIs.
• Optimise background job processing using Sidekiq.
• Help improve onboarding scalability and reduce backend delivery bottlenecks.
• Identify technical risks early and balance trade-offs between speed, quality, and scope.
• Collaborate within a cross-functional product squad.
• Support and mentor engineers through technical leadership and problem-solving.

Skills

Ruby on Rails

Rails monolith

RESTful APIs

PostgreSQL

Redis

Sidekiq

AWS

Docker

Job description

Salary: £58,000 - 98,000 per year

Requirements

• Strong commercial experience with Ruby on Rails in production environments
• Solid understanding of Rails monolith architecture and full-stack troubleshooting
• Experience building and maintaining RESTful APIs
• Strong knowledge of PostgreSQL, Redis, and Sidekiq
• Comfortable working with AWS infrastructure
• Experience using Docker in development or production environments

Responsibilities

• Own technical direction and architecture decisions within our Rails application
• Design, build, and maintain scalable backend services and RESTful APIs
• Optimise background job processing using Sidekiq
• Help improve onboarding scalability and reduce backend delivery bottlenecks
• Identify technical risks early and balance trade-offs between speed, quality, and scope
• Collaborate within a cross-functional product squad
• Support and mentor engineers through technical leadership and problem-solving

Technologies

• AWS
• Backend
• Docker
• Support
• PostgreSQL
• Rails
• Redis
• Ruby
• Cloud

More

We are a fast-growing B2B SaaS company building a next-generation data platform that delivers real-time insights to support passengers requiring assistance while travelling. We are hiring a Senior Developer to strengthen the core backend of our Passenger Assistance platform, helping us scale customer onboardings faster and reduce backend bottlenecks in feature delivery. This is a hybrid role based in London and offers the opportunity to step into technical leadership within a collaborative, high-growth environment while making a genuine impact.

last updated 33 week of 2026