Senior Full Stack Engineer

MCS Group; Belfast; Hybrid; GBP 65,000 - 85,000; Full time

Job summary

A fast-growing tech start-up is seeking a Senior Full Stack Engineer to join their expanding team. This role involves building and maintaining applications while collaborating in a high-autonomy environment. With a focus on innovation and AI, this position offers the chance to create significant impacts in a mission-driven culture.

Benefits

Remote-first with office days

Competitive salary up to £85K

Private healthcare

High ownership and impact

Mission-driven culture

Qualifications

• Experience in a fast-paced start-up environment.
• Comfort with cross-functional team dynamics.

Responsibilities

• Build and maintain features across backend and frontend systems.
• Collaborate with engineers, designers, and product managers.
• Make architectural decisions and own problems end-to-end.

Skills

Full-stack application delivery

Adaptability to new tools and frameworks

Understanding of CI/CD workflows

Tech-agnostic mindset

Collaboration in cross-functional teams

Passion for AI and SaaS products

Innovation in problem-solving

Job description

MCS Group is proud to be exclusively working with a fast-growing tech start-up as they enter an exciting scale-up phase. With strong investment and a product gaining real traction globally, they're now expanding their engineering team with a Senior Full Stack Engineer who's passionate about technology, adaptable, and excited to help shape the future of their platform.

This is a chance to make a real impact-solving complex problems, working on meaningful features, and being part of a mission-driven product team in a high-autonomy, high-responsibility environment.

What You'll Do:

• Build and maintain high-quality features across backend and frontend systems

• Collaborate closely with engineers, designers, and product managers in an agile environment

• Own problems end-to-end and contribute to architectural decisions

• Embrace innovation-including AI-to build creative solutions to real-world challenges

What They're Looking For:

• Experience delivering full-stack applications

• Someone who thrives in a fast-paced, start-up environment

• A passion for building and scaling SaaS products

• Mental flexibility and adaptability to pick up new tools, frameworks, or languages quickly

• Excitement about AI and its potential to transform product development

• Not hung up on specific languages-tech-agnostic mindset is valued

• Comfortable working in CI/CD workflows and cross-functional teams

Why Join:

• Remote-first, with 1-2 days in the office

• Join during a major growth phase and help shape the company's future

• High ownership, impact, and autonomy from day one

• Competitive salary up to £85K + private healthcare

• Mission-driven culture and strong team values

To speak in absolute confidence about this opportunity, please send an up-to-date CV via the link provided or contact Matthew Rainey, Specialist Tech Recruiter, at MCS Group on [phone].

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