£85,000 - £100,000 Per Annum
Full Time
Permanent
London, Greater London
IT
Posted 1 hour ago
Expires In 29 Days
Job Description
Senior Ruby On Rails Engineer / Tech Lead
Location: London (Hybrid – 2 days per week onsite)
Salary: Up to £100,000 (DOE)
The opportunity:
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:
What we’re looking for:
Essential experience:
Core technology stack:
Location: London (Hybrid – 2 days per week onsite)
Salary: Up to £100,000 (DOE)
The opportunity:
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
What we’re looking for:
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
- 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
- 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