Principal Java Engineer - Hybrid (South Belfast) | £90k-£95k Join a leading global security company building scalable, resilient platforms used by enterprise clients worldwide. We're expanding our Belfast engineering hub and seeking a Principal Java Engineer to take ownership of complex distributed systems, drive architectural direction, and mentor high-performing teams. This is a hybrid role based in South Belfast, with two days per week onsite, offering the chance to be part of a collaborative engineering culture while retaining flexibility. What you'll be doing Leading the design and delivery of large-scale, cloud-native systems using Java and Spring Boot Defining technical architecture and influencing long-term engineering strategy Building and optimising high-performance microservices deployed on Kubernetes (EKS) Designing and implementing CI/CD pipelines, deployment automation, and observability practices Mentoring engineers, shaping hiring decisions, and raising the technical bar across the team Collaborating closely with product and InfoSec teams to deliver secure, customer-focused solutions What we're looking for Extensive commercial experience as a Principal / Lead Java Engineer Expertise with Java 17 (ideally Java 21), Spring Boot, and modern distributed systems design Strong track record delivering microservice architectures on Kubernetes and AWS Hands-on experience with CI/CD, automation, monitoring, and cost-optimisation at scale Background in mentoring and leading engineering teams within agile environments Previous exposure to security, fintech, or other high-throughput systems a plus What's on offer Salary £90k-£95k depending on experience Hybrid working with 2 days onsite in South Belfast Opportunity to shape technical direction in a high-impact security platform Collaborative engineering culture with strong career progression pathways Apply here or reach out to Aaron Somers at Ocho for more information via LinkedIn. Skills: software development software engineering Java Benefits: Work From Home bonus pension healthcare