Senior Ruby On Rails Developer

OnTheGoSystems; United Kingdom; Remote; GBP 80,000 - 120,000; Full time

Benefits offered by this job

Fully remote

Great benefits

Mentorship & internal mobility

Job summary

OnTheGoSystems Ltd. is seeking a Senior Ruby on Rails Developer to own meaningful features and build reliable systems in a mature, high-trust engineering environment.

This remote, async-friendly role is for an experienced backend engineer who values code quality, testing, and long-term impact. You’ll own features from implementation to production, contribute to robust Rails systems at scale, and collaborate with product and fellow engineers to solve real user problems.

Qualifications

• 4+ years of professional experience with Ruby on Rails.
• Strong backend engineering skills and database experience.
• Experience writing and maintaining automated tests (unit, integration, and E2E).
• Experience building and running production systems.
• Availability during EMEA working hours.

Responsibilities

• Own features from implementation to production within a well-defined product scope.
• Build and maintain robust Ruby on Rails systems used at scale.
• Work closely with product and other engineers to solve real user problems.
• Write and maintain automated tests (unit, integration, and E2E).
• Improve performance, reliability, and maintainability of existing systems.
• Take responsibility for the quality and long-term health of what you build.

Skills

Ruby on Rails

Web APIs

CI/CD

AWS

Testing

Tools

Capybara

Job description

Senior Ruby on Rails Developer

We're looking for a Senior Ruby on Rails developer who enjoys owning meaningful features, building reliable systems, and working in a mature, high-trust engineering environment. This is an individual contributor role for an experienced backend engineer who cares deeply about code quality, testing, and long-term impact.

Why Join OTGS?

• Stable & self-funded: Founded in 2007, profitable, and independent - we build for the long term.
• Industry leaders: Creators of WPML, the № 1 multilingual plugin for WordPress, powering over 1.5 million sites
• Real product impact: You'll work on ATE, a core product at OTGS with real customers, real scale, and real technical challenges.
• Fully remote, async-friendly: Work from anywhere within EMEA hours as part of a global, distributed team.
• Engineering-driven culture: We value ownership, autonomy, testing, and thoughtful problem-solving.
• Growth without chaotic hype: Mentorship, internal mobility, and long-term career paths - without chaos.
• Fair compensation + great benefits: Designed to support your well-being both inside and outside of work.

What You'll Do

• Own features from implementation to production within a well-defined product scope
• Build and maintain robust Ruby on Rails systems used at scale
• Work closely with product and other engineers to solve real user problems
• Write and maintain automated tests (unit, integration, and E2E)
• Improve performance, reliability, and maintainability of existing systems
• Take responsibility for the quality and long-term health of what you build

What We're Looking For

• Required 4+ years of professional experience with Ruby on Rails
• Strong backend engineering skills and database experience
• Solid experience writing and maintaining automated tests (including E2E)
• Experience building and running production systems
• Comfortable working autonomously and taking ownership
• Strong problem-solving mindset, you look beyond tickets
• Experience with Web APIs
• Availability during EMEA working hours
• Nice to Have Experience with React
• CI/CD experience (GitLab, Jenkins, or similar)
• Background jobs, AWS, or complex integrations
• Experience with Capybara

This Role Is a Great Fit If You:

• Take pride in ownership and accountability
• Care about testing and long-term code quality
• Prefer stable, product-focused work over short-term hype
• Enjoy collaborating with thoughtful, kind, and experienced people
• Want to make a lasting impact on a product used by thousand of real customers