Principal Java Engineer

Ocho; Belfast; On-site; GBP 70,000 - 100,000; Full time

Job summary

Ocho is seeking a Principal Java Engineer for its Belfast office to lead the technical evolution of its backend system. The role involves designing microservices, mentoring engineers, and ensuring best practices in software development are followed. This position is ideal for engineers with extensive experience in Java and a passion for leading technical teams in a fast-paced environment.

Benefits

Generous annual leave

Flexible working environment

Qualifications

• 6+ years of Java development experience.
• Experience with microservices architecture.
• Strong understanding of system design and distributed systems.

Responsibilities

• Designing and building modern Java microservices.
• Mentoring engineers and setting engineering standards.
• Leading efforts to improve code quality and architecture.

Skills

Java development

Microservices

System design

Cloud-native development

Mentorship

Communication skills

Job description

Ocho Belfast, Northern Ireland, United Kingdom

Principal Java Engineer

Ocho Belfast, Northern Ireland, United Kingdom

2 days ago Be among the first 25 applicants

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This range is provided by Ocho. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

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The Opportunity

One of our scaleup partners is hiring a Principal Java Engineer to lead the technical evolution of their core backend system.

You’ll join a modern engineering team delivering high-scale, event-driven microservices. This is more than just a hands-on Java role ,you’ll be mentoring engineers, defining architecture, and setting engineering standards that will scale as the business grows.

What You’ll Be Doing

• Designing and building modern Java microservices in an event-driven architecture
• Leading the break-up of legacy monolith systems into scalable, decoupled services
• Driving best practices in code quality, architecture, and delivery
• Collaborating closely with product managers, designers, and engineering peers
• Providing mentorship and leadership within the team, from pairing to code review
• Helping the business scale safely and efficiently through pragmatic engineering decisions

What You’ll Bring

• 6+ years of Java development experience, including deep knowledge of microservices
• Experience migrating monolithic systems into modern service architectures
• Strong grasp of system design, distributed systems, and cloud-native development
• A technical mindset grounded in real-world delivery and commercial impact
• Experience in mentoring or leading engineers in a high-growth environment
• Great communication skills and a collaborative, team-first approach

Why Apply

• Generous annual leave
• Flexible working environment
• Work with a mission-led scaleup, solving real-world safety problems

Interested?

If you're a pragmatic Java engineer who loves clean systems, building for scale, and leading others toward technical excellence. Feel free to apply for the role or reach out to Ryan Quinn directly on LinkedIN.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Information Technology

• Industries

  Technology, Information and Media

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