Software Engineer (Ruby on Rails)

Addooco IT

Harrow

On-site

GBP 55,000 - 75,000

Full time

14 days+

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Benefits offered by this job

Referral programme

Free parking

Additional leave

Company pension

Cycle to work scheme

Work from home

Company events

On-site parking

Job summary

A dynamic IT solutions provider in Harrow is looking for a Senior Software Engineer specializing in Ruby on Rails. You will design and develop software solutions while contributing to the team's mission of delivering high-quality IT services. The ideal candidate has experience in software engineering, particularly with Ruby on Rails and PostgreSQL. This full-time position offers an opportunity for mentorship and professional growth within the rapidly evolving tech landscape.

Qualifications

2-5 years of professional software engineering experience.
2+ years of Ruby on Rails experience.
Experience with PostgreSQL or similar relational databases.

Responsibilities

Develop new features for existing systems under guidance.
Maintain and improve existing functionality.
Participate in code reviews and fix bugs.

Skills

Ruby on Rails

PostgreSQL

Automated testing

MVC architecture

Independently work

Job description

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

2-5 years professional software engineering experience
2+ years Ruby on Rails experience
PostgreSQL or similar relational database experience
Understanding of MVC architecture
Experience writing automated tests
Ability to work independently and as part of a team

Highly desirable

Background job processing (Sidekiq)
Payment gateway integration experience
Multi-tenancy or multi-database architecture
Cloud services such as S3, SES, EC2, RDS etc.
Laravel/PHP experience (for cross-team support)
Experience with real-time features (WebSockets, ActionCable)

Responsibilities

Development

Develop new features for existing system under guidance of Senior Software Engineer
Maintain and improve existing functionality
Write clean, well-tested code following team standards
Participate in code reviews
Fix bugs and resolve technical issues
Implement API endpoints and database migrations

Learning and growth

Build deep understanding of existing codebase during handover
Learn geospatial algorithms and PostGIS functionality
Develop expertise in multi-tenancy architecture
Grow technical skills through mentorship from Senior Software Engineer
Work towards becoming Product Expert in specialised areas

Operations

Participate in 24/7 on‑call rotation for system downtime events
Respond to production issues during on‑call shifts
Monitor system health and report anomalies
Work with Senior Software Engineer on feature planning and estimation
Coordinate with frontend team on API requirements
Communicate progress and blockers effectively
Support team members through knowledge sharing

Key Success Metrics

Successfully learn existing codebase and contribute independently within 2-3 months
Deliver features with minimal rework and high code quality
Maintain test coverage standards (>90%)
Effectively handle on‑call responsibilities
Demonstrate growth in technical capabilities over time

Company Benefits