Senior Full Stack Engineer Location: Lisburn (Full Remote or Hybrid across NI) Salary: Up to £95,000 15% Bonus As climate change reshapes global priorities, this organisation has made sustainability its focus. Our client is a fast-growing GreenTech scale-up operating as part of a well-established and financially secure group. Youll get the pace and influence of a start-up environment, backed by the stability and long-term vision of a larger parent organisation. They design and deliver a patented, cloud-based Centralised Data Platform that connects IoT devices across large retail estates. Their technology enables major retail brands to reduce energy consumption, cut carbon emissions, and unlock value from previously unused data streams. This is genuine Tech-for-Good, building scalable software that has measurable environmental impact. The Role As a Senior Full Stack Engineer, youll play a key role in building and evolving a multi-cloud, multi-region IoT platform used at enterprise scale. Youll contribute across the full technology stack designing robust backend services, developing intuitive front-end applications, and helping shape the overall architecture of a highly scalable cloud platform. This is more than a hands-on coding role. Youll influence engineering standards, DevSecOps practices, platform scalability, and technical direction within a 24/7 cloud environment. Its an ideal opportunity for someone who enjoys ownership, autonomy, and the chance to help shape a product during a strong growth phase. Key Responsibilities Design, develop, test, deploy and enhance full stack enterprise applications Build scalable backend services (primarily Java-based) powering IoT data platforms Develop modern, responsive front-end interfaces for real-time monitoring and analytics Contribute to the architecture of a global multi-cloud / multi-region platform Influence engineering best practices and SDLC improvements Collaborate with cross-functional teams including Product, Data and DevOps Support CI/CD pipelines and modern automated testing approaches Mentor junior engineers and provide technical guidance Deliver non-functional enterprise requirements (performance, security, scalability, resilience) Essential Criteria Relevant degree or equivalent commercial experience 5 years experience in full stack development Strong backend experience with Java Experience building modern front-end applications (e.g. React, Angular or similar frameworks) Strong understanding of scalable, cloud-based architectures Experience working within agile, DevSecOps environments Ability to write clean, maintainable, production-grade code Desirable Experience Multi-threaded applications and Spring framework IoT platforms or real-time data processing systems Cloud-native development (AWS, Azure or similar) CI/CD and containerisation tools (Jenkins, Argo, Kubernetes) Enterprise security and compliance standards Atlassian tooling (JIRA, Confluence) The Package & Benefits Up to £95,000 base salary 15% annual bonus (team achieved full 15% last year) Fully flexible remote working across Northern Ireland Hybrid option available if preferred 5% pension contribution Life assurance Gym flex membership Increasing annual leave with tenure Private medical at senior levels Clear progression opportunities as the company scales Interview Process Stage 1: Screening call Stage 2: Take-home technical challenge (1 week to complete) Stage 3: On-site final interview This is an excellent opportunity to join a scaling GreenTech organisation at a pivotal stage where you can shape technical direction, accelerate your career, and build technology that delivers meaningful environmental impact. If youd like further details, feel free to reach out. Skills: Java spring Javascript react aws Benefits: Work From Home