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5 jun 2025 bbbh58331 principal java engineer €100000.00 - €110000.00 per annum dublin

Belfast
MCS Group
Principal
€80,000 - €100,000 a year
Posted: 9 July
Offer description

Principal Java Engineer (Backend) - Scale-Up Security Tech - Remote/Hybrid (Ireland/NI)

€105-111k + 10% bonus + Equity

Event-Driven Microservices | Java | AWS | Hands-on Leadership An innovative scale-up is looking for a Principal Java Engineer to help them re-architect a critical platform used by law enforcement, emergency response, and global enterprise retailers. With $30 million Series A funding secured, they're scaling fast - across the UK, Ireland, the US, and Middle East - and building out their in-house software capability after years of outsourced development. You'll play a key role in rebuilding their platform from a monolithic legacy system to a modern, event-driven microservices architecture hosted on AWS. What you'll do

Lead the design and build of scalable Java microservices in an event-driven architecture

Help re-architect a platform used by thousands of users globally - high visibility, high impact

Work closely with product, QA, design, and senior engineering leadership

Provide hands-on coding, technical mentoring, and code reviews

Champion best practices in software design, performance, and system reliability

Be a key voice in technical strategy and architecture discussions

About you

6+years' experience with Java and Spring Boot, strong backend focus

Currently in a Principal, Staff or Tech Lead hands-on role Expertise in microservices and event-driven systems (Kafka, SNS/SQS, etc.)

Solid cloud experience in AWS

Experience breaking down monoliths into distributed systems

Comfortable in fast-paced scale-up environments - wearing multiple hats when needed

Strong communicator with a collaborative mindset

Bonus: exposure to C/C++ (due to the hardware element of the product)

What's on offer

€105-111k base salary

10% bonus + Equity/Share Options

Private healthcare after 25+ days

No pension currently offered

Flexible hybrid working - 1 day/week in Belfast HQ with occasional Dublin visits

Why join? You'll be joining a high-growth tech scale-up on a mission to improve public and workplace safety through cutting-edge hardware and software. It's an opportunity to do meaningful technical work, influence architecture, and help shape a product that's making a real-world difference - all while working alongside smart, supportive people in a down-to-earth team. To speak in absolute confidence about this opportunity please contact Jack Tyrrell, Specialist Recruitment Consultant at MCS Group 016994371or send an up to date CV via the link provided. If this position is not right for you, we may have others that are. Please visit

www.mcsgroup.jobs

to view a wide selection of our current jobs.

All conversations will be treated in the strictest of confidence.

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