Senior Ruby On Rails Engineer

We're looking for a Senior Ruby Engineer / Tech Lead to join a growing technology business building large-scale operational SaaS platforms used within complex, real-world environments.

This is a hands-on senior engineering role with a clear pathway into broader technical leadership responsibilities. It would suit someone who enjoys solving complex backend challenges while also taking ownership of delivery, technical direction, and team support.

You'll play a key role in scaling a modern Rails-based platform that supports high-volume transactional workflows, integrations with external systems, and mission-critical operational processes.

Working closely with the Director of Engineering, you'll help shape backend architecture, improve delivery processes, support customer onboarding initiatives, and act as a senior technical escalation point across the platform.

The business operates within a fast-paced product environment where reliability, scalability, and delivery quality are critical. The culture is collaborative, pragmatic, and ownership-driven, with a strong focus on autonomy, accountability, and continuous improvement.

What you'll be doing:

As a Senior Ruby Engineer / Tech Lead, you'll take ownership of backend delivery across key product areas while remaining heavily involved in hands-on engineering.

Key responsibilities include:

• Leading backend development across a large-scale Rails application

• Owning technical direction and contributing to architectural decisions

• Designing, building, and maintaining scalable backend services and APIs

• Supporting platform scalability, reliability, and maintainability

• Improving and refactoring existing backend functionality to reduce technical debt

• Optimising background job processing and asynchronous workflows

• Supporting integrations with external third-party systems and APIs

• Leading delivery planning, estimation, and technical scoping activities

• Acting as a senior escalation point for technical and delivery-related challenges

• Collaborating closely with product, engineering, and stakeholder teams

• Supporting sprint planning, Agile ceremonies, and delivery processes

• Mentoring and supporting engineers through technical guidance and collaboration

• Helping improve engineering standards, processes, and team effectiveness

Essential experience:

• Strong commercial experience with Ruby on Rails within production environments

• Experience building and maintaining scalable backend systems and APIs

• Strong understanding of Rails monolith architecture

• Experience with PostgreSQL, Redis, and Sidekiq

• Experience working with AWS-based infrastructure

• Experience using Docker within development or production environments

• Strong debugging and problem-solving capabilities

• Excellent communication and stakeholder management skills

• Ability to explain technical concepts clearly to both technical and non-technical audiences

• Strong ownership mentality with a pragmatic engineering approach

Desirable / bonus experience:

• Experience leading Agile ceremonies or delivery processes

• Experience scoping technical work and contributing to estimation activities

• Experience working with Kubernetes-based deployments

• Experience integrating third-party platforms and APIs

• Experience within B2B SaaS or operational platform environments

• Experience supporting live production systems at scale

• Experience mentoring or supporting engineers within a team environment

About you:

• You're a hands-on engineer who enjoys solving complex technical problems

• You're comfortable balancing technical leadership with day-to-day delivery

• You enjoy mentoring and supporting other developers

• You care about scalability, maintainability, and engineering quality

• You communicate clearly and collaborate well across technical and non-technical teams

• You're proactive, adaptable, and comfortable taking ownership

• You thrive in fast-moving environments where technology has real operational impact

Core technology stack:

• Ruby

• Ruby on Rails

• PostgreSQL

• Redis

• Sidekiq

• REST APIs

• AWS

• Docker

• Kubernetes

• Jira, Slack