Principal Java Developer - (Cybersecurity)

Ocho; Belfast; Hybrid; GBP 90,000 - 110,000; Full time

Job summary

A fast-scaling cloud-first business in Northern Ireland is seeking a Principal Java Developer to shape the new backend team. Responsibilities include designing scalable services using Java and mentoring junior developers. Ideal candidates will have extensive experience in backend engineering, particularly with Java 11+, AWS, and cloud-native practices. Competitive salary up to £110k and a hybrid working model are offered.

Benefits

Industry-leading benefits package

Work From Home

Qualifications

• 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 and REST APIs.

Responsibilities

• Designing and delivering complex backend services using Java / Spring Boot.
• Mentoring developers, conducting code reviews, and supporting onboarding as the team grows.
• Building services that scale in cloud-native environments (AWS).

Skills

Java

Cloud

Security

Golang

Cybersecurity

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.

Skills

• java
• golang
• cloud
• security
• cyber
• go

Benefits

• Work From Home