Principal Frontend Engineer

Overview

Build and lead the frontend for an AI-driven SaaS platform using TypeScript, React, Next.js.

Key Responsibilities

• ui design
• component library
• frontend architecture
• tech direction
• react development
• cross-team collaboration

Tasks

Defining reusable component libraries and frontend architecture from scratch. Setting technical direction for frontend standards, performance, and scalability. Building and scaling the entire frontend using TypeScript, React, and Next.js. You'll be joining as the Founding Frontend Engineer, taking full ownership of everything user-facing. You'll work side-by-side with the CTO to define architecture, build from first principles, and bring ideas to life. Turning complex data into simple, elegant visual interfaces. Collaborating closely with design, backend, and AI teams to shape the product experience. -Turning complex data into simple, elegant visual interfaces. -Defining reusable component libraries and frontend architecture from scratch. -Setting technical direction for frontend standards, performance, and scalability. -Building and scaling the entire frontend using TypeScript, React, and Next.js. -Collaborating closely with design, backend, and AI teams to shape the product experience.

Requirements

• typescript
• react
• next.js
• node.js
• ai
• autonomy

What You Bring

Some backend understanding (Node.js, APIs, integration). Autonomy, speed, and genuine ownership from day one. Experience working in a startup or fast-moving SaaS environment. Senior-level experience in TypeScript / React / Next.js (or similar modern frameworks). Curiosity about AI and LLM-driven products. Strong software engineering fundamentals - you can pick up any unfamiliar codebase and reason about how it works. If you love early-stage building - where decisions matter, ideas move fast, and your work defines what the company becomes - this is that opportunity. It's a complex problem, and they're looking for someone who's wired like a founder - an experienced Frontend Engineer who's built things from scratch, who thrives on autonomy, and who wants to have a direct hand in shaping how a product looks, feels, and performs. Experience building component libraries or design systems used across multiple teams. A hands-on, problem-solving mindset - you don't wait for direction, you create it. Ideally, some founder or early-stage experience - you've built or owned something before, even if it failed. -Autonomy, speed, and genuine ownership from day one. -Experience working in a startup or fast-moving SaaS environment. -Some backend understanding (Node.js, APIs, integration). -Senior-level experience in TypeScript / React / Next.js (or similar modern frameworks). -Ideally, some founder or early-stage experience - you've built or owned something before, even if it failed. -Strong software engineering fundamentals - you can pick up any unfamiliar codebase and reason about how it works. -Curiosity about AI and LLM-driven products. -A hands-on, problem-solving mindset - you don't wait for direction, you create it. -Experience building component libraries or design systems used across multiple teams.

People Also Searched For

Benefits

Salary up to €120k + founding-level equity. €100,000 - €120,000 + meaningful equity | On-site, Dublin City Centre This isn't a role for someone who wants to "pick up tickets" - it's for someone who wants to make big technical calls, influence direction, and leave a mark. You'll be joining a team full of founders - everyone here has built something before. Huge growth potential - future path to leadership -You'll be joining a team full of founders - everyone here has built something before. -Salary up to €120k + founding-level equity. -Huge growth potential - future path to leadership

About Mcs Group Consultancy

-Grew from a small start‑up into a global recruitment partner, expanding across the UK, Ireland, US and Europe. -Handles a diverse portfolio of projects—from sourcing top IT talent to engineering and finance specialists for multinational firms. -Focuses on technical & engineering, IT & digital, accountancy & financial services, sales & marketing, and HR & legal sectors. -Operates a boutique, founder‑led model that adapts to client needs with agility and deep industry insight. -Delivers tailored recruitment solutions for sectors like software development, engineering, finance and corporate services. -Known for a reputation built on personalized service, hands‑on leadership and a willingness to tackle tough talent challenges. -Unusual for a recruitment firm, it maintains a strong ethical stance, often directly mentoring candidates and clients alike. -Regularly pioneers new recruitment approaches, blending traditional headhunting with consultative strategy and regional expertise. -Continues to carve a niche by balancing ambitious growth with a personalised, relationship‑driven approach.

Sector Specialisms