Principal Java Developer - (Cybersecurity)

Ocho People; Belfast; Hybrid; GBP 93,000 - 110,000; Full time

Job summary

A growing tech company in Belfast is seeking a Principal Java Developer to lead a new backend team. The role involves designing scalable services and mentoring developers, requiring extensive experience in Core Java and cloud systems. The position offers a salary up to £110k and a hybrid working model with industry-leading benefits.

Benefits

Industry-leading benefits package

Hybrid working model

Qualifications

• 5-10 years of experience in backend engineering roles.
• Proven track record of building scalable services in Java.
• Hands-on experience with microservices architecture and message queues.

Responsibilities

• Design and deliver complex backend services using Java / Spring Boot.
• Support architectural decisions and scaling discussions.
• Collaborate with the technical lead to define best practices.

Skills

Core Java

Cloud systems

Microservices architecture

REST APIs

DevOps practices

Tools

AWS

Docker

Kubernetes

Job description

Overview

Principal / Staff Java Developer - (Cybersecurity)

The Ocho Exclusive opportunity for a Principal Java Developer to play a foundational role in a greenfield backend team at a fast-scaling, cloud-first business. Joining a new backend function, with the chance to set the tone for engineering standards, own key parts of the architecture, and mentor incoming talent as the team scales. You'll bring deep experience in Core Java and cloud systems, and use it to lead by example, from system design through to hands-on coding and mentoring.

Responsibilities

• Designing and delivering complex backend services using Java / Spring Boot
• Supporting architectural decisions, scaling discussions and performance tuning
• Collaborating closely with the technical lead to define best practices
• Mentoring developers, conducting code reviews, and supporting onboarding as the team grows
• Building services that scale in cloud-native environments (AWS) using modern DevOps practices

Essential Experience

• 5-10 years of experience in backend engineering roles
• Proven track record of building scalable services in Java (preferably 11+)
• Hands-on experience with microservices architecture, REST APIs, and message queues (Kafka, SQS or similar)
• Deep understanding of AWS and how to build with cloud in mind (ECS, Lambda, CloudWatch, etc.)
• Experience with CI/CD, Docker, and ideally Kubernetes

Bonus points for

• Experience in security, infrastructure or SaaS product environments
• Comfortable with ownership, ambiguity and early-stage team environments

What\'s on offer?

• Salary up to £110k
• Hybrid working (Belfast office)
• Industry-leading benefits package

To apply, connect with Neill Ferguson on LinkedIn or submit your CV via the link below.