Senior Ruby on Rails Backend Engineer – Scale Core

Company: Onyx-Conseil
Apply for the Senior Ruby on Rails Backend Engineer – Scale Core
Location: London
Job Description:

Onyx-Conseil is seeking a Senior Ruby on Rails Engineer to join their growing team in Fulham, with the option for 2 to 3 days on-site work. This is an exciting opportunity for a mid-to-senior level developer to influence the development of innovative accessibility solutions in a Series A startup.

The successful candidate will have extensive experience in Ruby on Rails, PostgreSQL, and background job processing, playing a pivotal role in ensuring the performance and scalability of the company’s platform.

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Posted: July 1st, 2026