Full-Stack Engineer - Growth-Focused SaaS Platform Remote (UK / EU) | Full-Time | Scale-up | EdTech / Cyber Security We're working with a fast-scaling SaaS company operating in the cyber security education space. With over 4 million users globally and continued rapid growth, they're on a mission to make learning cyber security accessible and engaging through a gamified training platform. As part of their expansion, they're now looking to hire a Full-Stack Engineer to join a small, cross-functional team focused on product growth experiments. This role is ideal for someone who thrives on delivering measurable user impact and is comfortable working in fast, iterative build-measure-learn cycles. The Opportunity: Collaborate with product, design, and engineering to build and ship new features aimed at improving user acquisition, activation, and retention Design and implement scalable, secure, and reliable software systems across the full stack Monitor system performance and experiment outcomes to guide future development Participate in Agile development practices, code reviews, and technical planning Contribute to a culture of experimentation, quality, and rapid iteration What We're Looking For: 5+ years of hands-on experience as a full-stack engineer (preferably within SaaS or product-led environments) Proven experience working in a software growth team or directly on product growth experiments Strong skills across the MERN stack (Node.js, React, Express, MongoDB) Familiarity with CI/CD workflows and cloud-based environments (AWS preferred) Understanding of scalable system design and front-end performance best practices Comfortable working in small teams and contributing across the development lifecycle Strong communication skills and the ability to work autonomously in a remote-first environment Interest in cyber security or educational platforms is a bonus Why Join: Work at the intersection of education and cybersecurity in a product that truly impacts users Be part of a fast-moving team where your contributions directly influence growth and engagement Flexible, remote-first culture and strong technical leadership Opportunity to grow your skills in experimentation-led product development If you're excited by the challenge of helping scale a product used by millions and you have hands-on experience working on growth-focused software teams we'd love to hear from you.