Senior Rails Developer

AllocatorLondon, United Kingdomlast year

As a Senior Ruby on Rails Developer, you will play a pivotal role in our growing technology team. You will harness your expertise to craft scalable web applications that redefine user experiences and will contribute to building out the next generation of data technology solutions. You will collaborate closely with cross-functional teams to architect and implement cutting-edge features, ensuring that we meet customer demand and drive efficiencies for the company. If you're passionate about Ruby on Rails and thrive in a fast-paced environment, this role is for you.

Primary Job Responsibilities

Design, build, and maintain efficient, reusable, and reliable Ruby code.
Experience and comfort working with large and complex monolith applications
Integration of data storage solutions, primarily PostgreSQL.
Work collaboratively with the product team to understand end-user requirements, facilitate formulating use cases, and translate them into a pragmatic and effective technical solution.
Implement, deploy and monitor application environments on Heroku
Able to work on legacy front-end technologies like older versions of bootstrap and plain scss and js

Skills And Qualifications

Minimum of 3 years’ experience in Ruby on Rails development.
Strong understanding of the syntax of Ruby and its nuances.
Solid understanding of object-oriented programming.
Firm grasp on plain SQL (PG Flavor) and ability to write complex plain SQL queries.
Familiarity with Coffeescript, ES6 and plain Javascript code.
Good understanding of server-side CSS preprocessors.
Proficient understanding of code versioning tools, e.g., Git.
Basic understanding of Server and storage technologies like S3 and Heroku
Hands-on experience integrating LLM APIs (e.g., GPT, Gemini, Claude) into web applications.
Experience designing or implementing basic prompt engineering or fine-tuning tasks.
Experience and proficiency with Python
Knowledge of Fintech, investment management or alternative assets industries
Capable of implementing automated testing platforms and unit tests.
Understanding of fundamental design principles behind a scalable application.

Location

Remote

Minimum Experience

Mid-level

View all remote jobs at Allocator →

FAQ

Is the Senior Rails Developer position at Allocator remote?: Yes. This role was posted on Remote Frontend Jobs, a job board that lists exclusively fully remote positions.
When was this Senior Rails Developer job posted?: This listing was posted on August 15, 2025 and is still open for applications.
How do I apply for the Senior Rails Developer position at Allocator?: Use the apply button on this page — it takes you directly to the employer’s application page.