Principal Full Stack Engineer (Ruby) - NEW FDI

MCS Group; Belfast; On-site; GBP 100,000 - 125,000; Full time

Job summary

A high-growth technology scale-up in Belfast seeks a full-stack engineer to join their new team. You will deliver new product features, drive AI initiatives, and collaborate with teams globally. This role offers competitive salary and the chance to shape the culture of the new engineering hub.

Benefits

Highly competitive salary

Opportunity to grow in a scale-up

Travel opportunities for collaboration

Qualifications

• Strong full-stack engineering skills in various programming languages.
• Curiosity and drive to work with emerging tools and AI technologies.
• Cloud-native mindset with experience in AWS and DevOps.

Responsibilities

• Build and deliver new product features across the core platform.
• Contribute to innovation projects including AI/ML initiatives.
• Work cross-functionally with design, product, and engineering teams.

Skills

Full-stack engineering

Curiosity about AI technologies

Collaborative approach

Tools

AWS

DevOps

React

Ruby

Python

Java

.NET

Job description

MCS Group are delighted to be working with a high‑growth technology scale‑up entering a major expansion phase. With strong funding and an ambitious roadmap ahead, this is a fantastic opportunity to join a business at the forefront of innovation in the global tech sector.

The Opportunity

As part of their international growth strategy, the company is establishing a new hub in Northern Ireland. Early hires will have the chance to make a real impact – working on core product development, driving innovation, and helping shape the culture of the new team.

You’ll collaborate closely with experienced colleagues across the US and Europe, contribute to new product features, and get exposure to cutting‑edge technologies including AI and cloud‑native solutions.

What you’ll do

• Build and deliver new product features across the core platform
• Contribute to innovation projects, including AI/ML initiatives
• Work cross‑functionally with design, product, and engineering colleagues globally
• Represent the brand in NI and play a key role in growing the hub

What you’ll bring

• Strong full‑stack engineering skills (open on languages, e.g. React, Ruby, Python, Java, .NET etc.)
• Curiosity and drive to work with emerging tools and AI technologies
• Cloud‑native mindset, ideally with AWS and DevOps experience
• A collaborative approach and interest in shaping a new engineering culture

Why join?

• Highly competitive salary (senior & principal levels available)
• Opportunity to be part of a scale‑up in an exciting growth phase
• Real visibility and impact from day one
• Travel opportunities for onboarding and collaboration with international teams
• The chance to help establish and shape a brand‑new NI engineering hub

🔥 A chance to join a growing insurtech disruptor at a pivotal moment, working on AI‑driven innovation and scaling a platform that's set to transform a $100B+ market.

To speak in absolute confidence about this opportunity please contact Rachael Walker, IT Recruitment Manager at MCS Group.

We have other positions if this one is not right for you.

Please visit MCS Group www.mcsgroup.jobs to view a wide selection of our current jobs or give us a call 028 9023 5456.

All conversations will be treated in the strictest of confidence.