Senior Ruby Developer - Remote - Outside IR35

About Us:

Solirius Reply, part of the Reply Group, is a technology consultancy and digital transformation partner that helps organisations solve complex challenges through strategy, design, engineering, and delivery.

We work closely with our clients to deliver secure, accessible, user-focused services that evolve with their needs. By combining deep technical expertise with people-centred design, we create solutions that deliver meaningful, lasting impact.

Our consultants partner directly with client teams, embedding into organisations to understand their goals, challenges, and users. This collaborative approach enables us to deliver tailored solutions that drive measurable outcomes across public and private sectors.

Past and present clients include the Ministry of Justice, Department for Education, Ministry of Housing, Communities and Local Government, UEFA, International Olympic Committee, and Mercedes-Benz. Our services span the full digital delivery life cycle, including architecture, engineering, delivery management, user-centred design, business analysis, data, DevOps, and AI.

About You:

You are a motivated and adaptable professional with a strong analytical mindset and a passion for using technology to solve real-world problems. You enjoy working in collaborative, agile teams and take pride in delivering high-quality solutions that make a tangible impact. With strong communication skills and a consultative approach, you're comfortable engaging with clients, understanding their needs, and translating them into effective outcomes.

Role Purpose

As a Senior Ruby Developer, you will be at the forefront of designing, building, and maintaining robust, secure, and user-centric digital services. You will work within an agile delivery team to transform complex public services into simple, accessible digital experiences, strictly adhering to the Government Digital Service (GDS) Service Standard.

Key Responsibilities

• Design & Development: Build and maintain scalable, secure, and resilient web applications using Ruby on Rails.

• Standards & Accessibility: Ensure all digital products meet GDS Service Standards and comply with WCAG 2.1/2.2 AA accessibility guidelines.

• Testing & CI/CD: Write clean, well-tested code (TDD/BDD using RSpec) and manage automated deployment pipelines.

• Technical Leadership: Lead architectural decisions, participate in code reviews, and advocate for technical debt reduction.

• Collaboration: Actively contribute to agile ceremonies (sprints, stand-ups, retrospectives) and communicate complex technical concepts to non-technical stakeholders.

Technical Skills & Experience

• Expert Ruby Knowledge: Deep, production-level experience with Ruby and the Ruby on Rails framework.

• Testing Frameworks: Strong background in Test-Driven Development (TDD) using RSpec, Capybara, or similar frameworks.

• Database & API Design: Proficiency with relational databases (PostgreSQL, MySQL) and designing secure, RESTful APIs.

• Cloud & DevOps: Experience deploying and managing applications in cloud environments.

• Frontend Basics: Good understanding of HTML5, CSS/SASS, and JavaScript.

• Previous experience working on GDS/GOV.UK projects or passing GDS assessments.

• Familiarity with the GOV.UK Design System and prototype kit.

• Understanding of public sector security practices, data protection (GDPR), and handling sensitive data.

Core Competencies & Soft Skills

• Problem Solving: Ability to untangle Legacy systems and monolithic architectures into clean, maintainable code.

• Communication: Exceptional ability to explain technical trade-offs to product owners and stakeholders.

• User-Centric Mindset: A strong commitment to putting the user's needs at the heart of the engineering process.