Senior Software Engineer - NWX Networx

About IRISIRIS Software Group is one of the UK's largest privately held software companies, trusted by 100,000+ businesses, schools and accountancy firms to keep their operations running. Our software pays 1 in 6 UK employees, supports over 12,000 schools, and is relied on by 91 of the top 100 UK accountancy firms.

We're a Great Place to Work certified employer, recognised for our commitment to well-being, inclusion and development - and we're growing fast.

The Opportunity Join a team at the heart of a major technology transformation. We're evolving a market-leading Applicant Tracking System from a legacy monolithic platform into a modern, cloud-native Azure application, and we're looking for a Senior Software Engineer who wants to do more than just write code. This is an opportunity to influence architecture, mentor developers, champion engineering best practices, and help shape the future direction of a product used by thousands of customers.

Role Purpose As a Senior Software Engineer, you will be a technical leader within your team, responsible for delivering complex full-stack web applications, serving millions of users, driving technical excellence, and mentoring other engineers. You will work hands-on with cutting-edge UI frameworks, .NET Core backends, and cloud-native technologies while contributing to architectural decisions and ensuring high-quality software delivery across containerised, scalable web products.

Key Responsibilities Technical Delivery
· Design and deliver complex, scalable systems (multi-service integrations, high-traffic APIs, data processing pipelines) that anticipate edge cases, scalability issues, and long-term maintainability
· Own large features or entire components across their complete lifecycle from conception to production support
· Lead technical discussions and influence architecture decisions within team systems and components, with authority over component-level technical choices and escalation path to Engineering Lead for cross-team impacts
· Drive technical excellence by establishing architectural patterns, standards, and best practices that others can follow
· Ensure knowledge transfer and documentation for owned systems to enable team continuity

Collaboration & Communication
· Lead story refinement sessions with Product Owners, providing technical expertise for estimation and risk assessment
· Partner with cross-functional teams (product, design, QA) to deliver comprehensive solutions that meet business objectives
· Influence technology choices based on deep technical understanding and business context
· Lead team Agile ceremony facilitation to drive continuous process improvements, and establish team practices that enhance delivery predictability
· Proactively identify and inspire resolution of technical debt and system improvements

Quality & Standards
· Champion comprehensive quality practices including TDD/BDD standards, automated testing strategies, and shift-left testing
· Lead security implementation across complex features establish security practices and conduct comprehensive security reviews
· Establish development tooling and practices used consistently within the team
· Lead troubleshooting efforts for complex software issues and production incidents
· Establish documentation standards for complex team systems and drive knowledge transfer practices across team deliverables

Growth & Development
· Mentor junior and mid-level engineers actively to raise team capability and technical standards
· Lead team code review standards establishment conduct complex feature reviews, and drive quality improvements across team deliverables
· Drive continuous improvement and champion responsible AI adoption with team governance practices

Required Experience & Skills…