Ruby Developer – HTML5, Rails Javascript, TDD

Company: Quant Capital
Apply for the Ruby Developer – HTML5, Rails Javascript, TDD
Location: London
Job Description:

Overview

In this role you will contribute to a fintech-led platform by designing, building and evolving Ruby/Rails-based applications that communicate with a Java API. You’ll work in an Agile-flavored team to deliver high‑quality, scalable web solutions and help shape the platform architecture. You’ll stabilise and extend a rapidly developed stack on Linux, AWS and frontend components, with opportunities to influence technology strategy. This is a hands-on, mid to senior role in a collaborative, fast‑paced environment.

Responsibilities

  • Design and develop new Rails applications in collaboration with the team
  • Help architect the platform and contribute to technology strategy
  • Design and implement REST APIs
  • Build a brand new web platform in Ruby
  • Conduct code reviews and ensure code quality
  • Stabilise and integrate greenfield functionality with existing Java/AWS-based platform

Key requirements

  • 5 years of commercial development experience in Ruby
  • Experience designing and building Rails applications
  • Ruby, Javascript, HTML5, CSS3
  • Working knowledge of Linux
  • Mobile application experience beneficial
  • Hadoop experience is not required
  • ambitious and technically focused
  • enjoys working in a relaxed, open environment
  • strong collaboration and communication within an Agile team
  • Ruby
  • Java
  • Ruby on Rails

Posted: September 14th, 2026