Ruby Developer – Full Stack, Rails Javascript, TDD

Company: Quant Capital
Apply for the Ruby Developer – Full Stack, Rails Javascript, TDD
Location: London
Job Description:

Overview

Senior Ruby Developer to build and evolve a new Rails-based web platform that communicates with a Java API. You will join a compact, highly capable team in a fintech client project, helping design and deliver bleeding-edge applications with a pragmatic agile approach. Expect to shape the platform architecture, contribute to technology strategy, and implement a robust REST API. The role offers a relaxed, tech-focused culture and potential for impactful, money-motivated work.

Responsibilities

  • Design and develop new applications in collaboration with the existing team
  • Play a major role in architecting the platform
  • Contribute to technology strategy and architectural decisions
  • Design and help implement a REST API
  • Build a brand-new web platform in Ruby
  • Conduct code reviews within an Agile-minded environment

Key requirements

  • 5 years commercial development experience in Ruby
  • Experience designing and building Rails applications
  • Ruby
  • Javascript
  • Working knowledge of Linux
  • Understanding of applications on AWS
  • Experience with mobile applications (beneficial)
  • Degree level education or equivalent
  • Rails expertise in a Ruby-based stack
  • collaborative
  • problem-solving mindset
  • able to think through decisions and balance speed with quality
  • Ruby
  • Javascript
  • Ruby on Rails

Posted: September 14th, 2026