Addooco is a managed IT, cloud, and communications solutions provider specializing in enterprise-grade services for businesses of all sizes. Established in 2008, the company operates across the United Kingdom region and beyond, focusing on proactive management and in-house developed solutions delivered through their own datacenter infrastructure.

Summary

We are seeking a highly skilled Senior Software Engineer specialising in Ruby on Rails to join our dynamic team. In this role, you will contribute to designing and developing innovative software solutions that support our clients’ needs and align with our mission to deliver top-tier IT services.

Required skills & experience

Essential:

5+ years professional software engineering experience
3+ years Ruby on Rails experience (Rails 7-8 preferred)
Strong PostgreSQL experience
Geospatial data experience (PostGIS, RGeo, or similar geospatial libraries)
Multi-tenancy architecture and database sharding
Background job processing (Sidekiq, Resque, or similar)
RESTful API design and development
Payment gateway integration (Stripe, Adyen, or similar)
Git version control and GitHub workflows
Automated testing experience (Minitest, RSpec, or similar)
Experience with WebSockets and real-time features (ActionCable or similar)

Highly desirable:

Laravel/PHP experience (for cross-team support)
React or JavaScript experience (for full-stack work)
Rails 8 specific features (Solid Cache, Solid Queue, etc.)
Cloud services such as S3, SES, EC2, RDS etc.
Twilio or other SMS/communication APIs
Experience taking over codebases from external teams
Previous experience in transport/logistics/dispatch systems

Responsibilities

Technical leadership:

Act as a product expert for ongoing team projects
Provide technical guidance and mentoring to mid-level engineers
Review code and provide constructive feedback
Make architectural decisions for the Ruby backend
Establish coding standards and best practices for the team

Development:

Take ownership of an existing system from an external vendor during a handover period
Develop new features for the system
Maintain and improve existing functionality
Optimise geospatial algorithms and database queries
Integrate third-party APIs (payment providers, SMS, etc.)
Write comprehensive automated tests (unit, feature)

Operations:

Participate in 24/7 on-call rotation for system downtime events
Investigate and resolve production issues
Monitor system performance and implement improvements
Collaborate with DevOps on deployment and infrastructure

Collaboration:

Work directly with stakeholders to understand requirements
Coordinate with frontend team on API contracts
Provide input to project planning and estimation
Support other teams when cross-functional needs arise

Knowledge transfer:

Build comprehensive understanding of existing system during handover
Document complex systems and architectural decisions
Share knowledge with mid-level team members
Prepare the team to mentor junior engineers in the future

Key Success Metrics

Successfully complete handover and take full ownership of existing system from external vendor within 3 months
Maintain 24/7 system uptime (99%+ availability)
Deliver new features while maintaining code quality (test coverage>90%)
Build effective team processes and establish technical standards
Develop mid-level engineers' capabilities through mentoring

Company Benefits