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IRIS 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.
As a Principal Engineer, you will be a senior technical leader responsible for shaping the architecture, engineering standards, and technical direction of our products. This is a highly hands-on role where you will lead from the front, working closely with engineering teams to deliver new features, integrations, platform enhancements, technical debt reduction initiatives, and high-quality customer outcomes.
You will collaborate with Product, Architecture, DevOps, Support, and other stakeholders across the business to ensure solutions are scalable, secure, and maintainable. Alongside driving technical excellence, you will mentor engineers, champion modern software development practices, and help teams continuously improve how they build and deliver software.
Working across a range of technologies and product domains, you will play a key role in modernising legacy platforms, solving complex technical challenges, and building cloud-native solutions that support our growing customer base.
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Cloud platform certifications (Azure, AWS, or GCP).
Experience with observability, monitoring, and performance optimisation practices.
Experience modernising legacy applications and driving large-scale technical transformations.
Technical Leadership & Architecture
Software Engineering Excellence
Coaching & Mentorship
Collaboration & Stakeholder Management
Ownership & Accountability
Strategic Decision Making
Problem Solving & Innovation
Continuous Improvement Mindset
Impact: Your work will influence millions globally.
Growth: Continuous learning and career development opportunities.
Belonging: A culture that celebrates diversity and empowers every individual.
Click Apply - we’re excited to learn about your unique perspective and experience. If you need adjustments during the process, let us know. We’re committed to making this opportunity accessible to everyone.
Our process is designed to be fair, transparent and straightforward. Stages vary depending on the role — more senior positions may involve additional steps, and some areas include role-specific assessments such as a technical test or case study — but typically you can expect:
Application review — we assess your experience and potential
Initial call — a short conversation to learn about you and share more about the role
Skills assessment — tailored to the position, e.g. case study, coding challenge or portfolio review
Final interview — meet the team and explore how you'll make an IMPACT at IRIS
We'll always walk you through the specific stages at the start of the process so you can prepare with confidence.
If you need any adjustments or accommodations during the process, let us know, we’re committed to making this experience accessible for everyone.
Privately held software provider serving accountants, businesses, HR and payroll teams, and educational organizations worldwide.
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Senior
Remote
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