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- Tasks: Lead the design and delivery of modern, scalable front-end applications using React.
- Company: Join MCS Group, a tech leader committed to innovation and inclusivity.
- Benefits: Enjoy a competitive salary, bonus, and flexible hybrid working in Belfast.
- Why this job: Make a real impact on complex projects while mentoring fellow engineers.
- Qualifications: Solid experience with React, TypeScript, and micro-frontend architectures required.
- Other info: Be part of a collaborative team with excellent career growth opportunities.
The predicted salary is between 80000 - 95000 £ per year.
MCS Group is looking for a highly experienced Principal React Developer to lead the design and delivery of modern, scalable front‑end applications. This is a hands‑on role where you'll shape architecture, set best practice, and mentor engineers within a collaborative product‑focused team. This is a key hire for this development team, and will be a position of technical influence within the company. This is an excellent opportunity to work on complex front‑end challenges, and make a real impact while enjoying the flexibility of a hybrid role based in Belfast.
The Role
- Help define and evolve front‑end solutions for large‑scale platforms, balancing design intent with technical practicality, performance and inclusivity.
- Turn product and design concepts into well‑structured, production‑ready interfaces that integrate cleanly with underlying services.
- Work alongside delivery, data and analysis teams to clarify requirements, constraints and technical trade‑offs.
- Take an active role in end‑to‑end delivery, keeping senior engineering stakeholders informed of progress and risks.
- Create and enhance customer‑facing functionality, while developing shared components and patterns through an internal design system.
You will be working with:
- React 18+ & TypeScript - advanced hooks, generics, composition patterns and performance optimisation
- Tailwind CSS and custom design systems
- React Hook Form for complex validation and type‑safe API contracts
- Storybook 8 for component documentation and visual testing
This role requires solid experience with:
- Micro‑frontend architectures within an Nx workspace
- Component‑driven development and design systems
- Domain‑driven design for business logic
- API‑first, type‑safe development
Salary
Salary: £80k - £95k DOE. Competitive benefits package including bonus.
To speak in absolute confidence about this opportunity please send an up to date CV via the link provided or contact Jill Johnston, Head of IT Contracts, at MCS Group 02896 935 509.
MCS Group is committed to Equality, Diversity, and Inclusion for all, being the first recruitment agency in NI to achieve Bronze Diversity Mark accreditation. If you have a disability which means you require a reasonable adjustment to be considered at any stage of the recruitment process, please contact us and we will endeavour to facilitate the request.
Not all agencies are the same… MCS Group are passionate about providing a first‑class service to all our customers and have an independent review rating of 4.9 stars on Google.
27 Jan 2026 BBBH62472 Principal React Developer £80000 - £95000 per annum Belfast employer: MCS Group
Contact Detail:
MCS Group Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land 27 Jan 2026 BBBH62472 Principal React Developer £80000 - £95000 per annum Belfast
✨Tip Number 1
Network like a pro! Reach out to your connections in the tech world, especially those who work with React or at companies you're interested in. A friendly chat can lead to insider info about job openings that aren't even advertised yet.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your best React projects. Whether it's a personal website or contributions to open-source, having tangible examples of your work can really set you apart during interviews.
✨Tip Number 3
Prepare for technical interviews by brushing up on your coding skills and understanding of front-end architectures. Practice common React interview questions and be ready to discuss your thought process while solving problems.
✨Tip Number 4
Don't forget to apply through our website! We have loads of opportunities that might just be perfect for you. Plus, it shows you're serious about joining our team and makes it easier for us to connect with you.
We think you need these skills to ace 27 Jan 2026 BBBH62472 Principal React Developer £80000 - £95000 per annum Belfast
Some tips for your application 🫡
Tailor Your CV: Make sure your CV reflects the skills and experiences that align with the Principal React Developer role. Highlight your experience with React, TypeScript, and any relevant design systems to catch our eye!
Showcase Your Projects: Include links to your previous work or projects that demonstrate your expertise in front-end development. We love seeing real examples of how you've tackled complex challenges and delivered results.
Craft a Compelling Cover Letter: Use your cover letter to tell us why you're passionate about this role and how you can contribute to our team. Be genuine and let your personality shine through – we want to get to know the real you!
Apply Through Our Website: For the best chance of success, make sure to apply directly through our website. This helps us keep track of your application and ensures it gets the attention it deserves!
How to prepare for a job interview at MCS Group
✨Know Your Tech Stack Inside Out
Make sure you’re well-versed in React 18+, TypeScript, and the other technologies mentioned in the job description. Be prepared to discuss your experience with advanced hooks, performance optimisation, and component-driven development. This will show that you’re not just familiar with the tools, but that you can leverage them effectively.
✨Showcase Your Problem-Solving Skills
Be ready to tackle some complex front-end challenges during the interview. Think about past projects where you had to balance design intent with technical practicality. Sharing specific examples of how you approached these challenges will demonstrate your ability to think critically and creatively.
✨Emphasise Collaboration and Mentorship
Since this role involves mentoring engineers and working within a collaborative team, highlight your experience in these areas. Discuss how you’ve helped others grow in their roles or how you’ve worked alongside cross-functional teams to deliver successful projects.
✨Prepare Questions About the Role
Interviews are a two-way street, so come prepared with insightful questions about the company’s approach to front-end architecture, their design systems, or how they handle technical trade-offs. This shows your genuine interest in the role and helps you assess if it’s the right fit for you.
