Permanent full time Build software used by thousands. Influence technical direction. Mentor others. IRIS is one of the UK’s largest privately held software companies and a major European provider of payroll and HR solutions. We’re now looking for a Senior Software Engineer to join our Dataplan team. This is a hands on senior role combining deep technical contribution with delivery ownership and mentoring responsibility. You’ll help shape and scale a cloud-based payroll and HR platform serving thousands of customers. The Role You’ll spend the majority of your time writing high quality code while also: * Driving end-to-end feature delivery * Partnering with Product on roadmap and prioritisation * Mentoring and supporting junior engineers * Leading best practice adoption (testing, CI/CD, observability) * Contributing to architectural decisions * Managing technical debt and platform health * Supporting incident resolution and continuous improvement Our Tech Stack Core: * PHP (Laravel) * ReactJS * JavaScript * Relational databases * Kubernetes * Docker * Linux Desirable: * React Native * MariaDB * Jenkins * GitLab About You * 5 years’ experience in software engineering * Strong experience building and shipping scalable web applications * Comfortable in Agile environments with sprint-based delivery * Strong knowledge of CI/CD and DevOps principles * Experience supporting production systems * Passion for mentoring and raising engineering standards Bonus points for experience in regulated sectors (finance, health, govtech) or working with AI tools to improve engineering productivity. What You’ll Get * Opportunity to influence technical direction * Exposure to enterprise scale systems * Clear progression opportunities If you’re a senior engineer who enjoys owning delivery, shaping solutions, and developing others — we’d love to hear from you. Please note: We occasionally close vacancies early in the event that we receive a high volume of applications. Therefore we recommend you apply as soon as possible