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. Not the right fit? Visit to browse other exclusive tech roles. All conversations will be treated with the strictest confidence. Skills: senior software developer senior software engineer AI start up Technical lead