Overview
Principal Frontend Engineer - TypeScript / React /
€100,000 - €120,000 + meaningful equity | On-site, Dublin City Centre.
We're working with an early-stage AI startup in Dublin, led by founders who have built, scaled, and sold successful tech companies, and are now working on their most ambitious product yet.
They are developing an AI platform that helps business leaders understand what's really going on across their teams through conversations happening in meetings, calls, and chats.
This role is for someone who wants to make big technical decisions, own the frontend from end to end, and directly influence how a product looks, feels, and performs.
The Role
You will join as the Founding Frontend Engineer, taking full ownership of everything user-facing.
You'll work with the CTO to define architecture, build from first principles, and bring ideas to life.
This is a role for someone who wants to make foundational technical calls rather than simply addressing tickets.
What You'll Be Doing
Building and scaling the entire frontend using TypeScript, React, and
Defining reusable component libraries and frontend architecture from scratch.
Collaborating with design, backend, and AI teams to shape the product experience.
Turning complex data into simple, elegant visual interfaces.
Setting technical direction for frontend standards, performance, and scalability.
What You'll Bring
Senior-level experience in TypeScript / React / (or similar modern frameworks).
Strong software engineering fundamentals and the ability to reason about unfamiliar codebases.
Experience in a startup or fast-moving SaaS environment.
Ideally some founder or early-stage experience, having built or owned something before.
A hands-on, problem-solving mindset with proactive leadership.
Nice to Have
Experience building component libraries or design systems used across teams.
Some backend understanding, APIs, integration).
Curiosity about AI and LLM-driven products.
Why Join
Join a team with founders who have built something before.
On-site 5 days a week in a new Dublin City Centre office.
Salary up to €120k + founding-level equity.
Huge growth potential and a future path to leadership.
Autonomy, speed, and genuine ownership from day one.
If you love early-stage building where decisions matter and your work defines the company, this is that opportunity.
If you're the type of engineer who thinks, "I could build this better myself," now's your chance to prove it.
To speak in absolute confidence about this opportunity please contact Jack Tyrrell, Specialist Recruitment Consultant at MCS Group,, or 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 to view a wide selection of our current jobs.
All conversations will be treated in the strictest of confidence.
#J-*****-Ljbffr