Senior Backend Engineer – Ruby

Does this sound like you?

You’re a motivated and detail-oriented professional who thrives in a fast-paced environment. With strong communication, organisation, and problem-solving skills, you enjoy owning your workstream from end to end. You are a proactive engineer who takes ownership of complex technical challenges and enjoys building scalable applications. You’re someone who goes beyond task completion to deliver genuine value through high-quality, maintainable code and a positive experience for everyone involved.

What you’ll be doing (in a nutshell):

In this role, you’ll take ownership of key operational responsibilities for our backend systems, ensuring smooth delivery and execution of our Ruby on Rails applications. You’ll work collaboratively with product, design, and other engineering teams to build seamless outcomes, evolve our APIs, and support organisational success.

Day-to-day you can expect to:

• Design, develop, and maintain scalable Ruby on Rails applications and backend services
• Build and maintain robust RESTful APIs while ensuring secure authentication and authorisation patterns
• Work with relational databases including AWS RDS, MySQL, and Postgres
• Write clean, well-tested code following engineering best practices and implement background jobs
• Troubleshoot, debug, and optimise application performance to ensure a great user experience
• Participate in code reviews and contribute to improving our engineering standards
• Identify opportunities for process improvement and technical innovation within the codebase

To be successful, you’ll have:

• At least 3 years of professional experience with Ruby on Rails
• Solid understanding of Ruby, JavaScript or Typescript, and MVC architecture
• Strong experience with relational databases such as PostgreSQL or MySQL and ORM tools like ActiveRecord
• Proficiency with RSpec, Git, and mocking and unit testing principles
• Experience with background job processing using tools like Sidekiq
• Excellent communication skills with the ability to engage stakeholders and collaborate with frontend teams
• A detail-oriented approach with a commitment to quality, accuracy, and clean code

Bonus points if you bring:

• Understanding or experience with GraphQL
• Experience implementing or integrating SSO (Single Sign-On)
• Previous experience working in cloud environments, specifically AWS
• Familiarity with CI/CD pipelines and working in a fast-paced or scaling organisation
• A problem-solving approach with confidence navigating ambiguity or change

Why Perkbox?

It’s an exciting time to join us at such a pivotal moment. We recently launched our Bulgarian operations with a bold mission to build a high-performing and inspired team. Our goal is to foster a workplace defined by growth, genuine collaboration, and a sense of purpose.

With more than 20 years of experience across public, private, SME and corporate sectors, Perkbox are now supporting over 4 million employees across 7,500 organisations. From access to expert mental health services to help with the cost of everyday essentials, our expanded range of benefits and wellbeing tools meets people where they are – at work and beyond.

We’re redefining what employee benefits can be. And we’re just getting started.

The Interview Process

Our interview process involves 4 main stages:

• Application
• Short call with a member of the TA team
• 60-minute video call with Hiring Manager and one other team member
• Final Interview and task with two members of the team