Senior Software Engineer

Senior Full Stack Engineer (Remote, UK)

Join one of the fastest-growing online learning platforms, helping millions of people develop real-world cybersecurity skills through interactive, gamified challenges. The company’s mission is simple — to make learning and teaching cybersecurity easier, more practical, and more accessible to everyone.

We’re now scaling globally and looking for a Senior Full Stack Engineer to help build the next generation of learning experiences.

The Role

You’ll work across the full stack to design, build, and scale features used by millions of learners worldwide. This is a hands-on role focused on growth engineering — taking ideas from concept to delivery through rapid iteration and a build-measure-learn cycle.

You’ll collaborate closely with a small, cross-functional team of engineers, designers, and product managers to create robust, secure, and scalable systems that support our growing platform.

What You’ll Do

• Design and implement high-quality, scalable software solutions
• Write and maintain clean, testable code using Node.js, React, TypeScript, and MongoDB
• Lead by example, mentoring junior engineers and driving technical excellence
• Review code, contribute to architecture decisions, and improve development processes
• Optimise performance, troubleshoot bottlenecks, and monitor system reliability
• Collaborate across design and product to deliver exceptional user experiences
• Contribute to Agile development practices including sprint planning and retrospectives

What You’ll Bring

• 5+ years’ experience in full-stack software development
• Proven experience in a SaaS, startup, or scale-up environment
• Strong hands-on experience with MERN stack (MongoDB, Express, React, Node.js)
• Knowledge of AWS (or similar cloud platforms) and CI/CD pipelines
• Experience leading or mentoring software teams
• Strong understanding of scalable architecture and software design principles
• Excellent communication and collaboration skills
• Interest in cybersecurity or edtech is a plus

Why Join

You’ll be part of a mission-driven company helping people around the world break into tech — while working remotely, flexibly, and with full ownership of your craft.

What’s on offer:

• 100% remote working across 35+ countries
• Flexible working hours with UK timezone overlap
• Competitive pay benchmarked globally
• £2,500 annual personal development budget
• Health insurance and pension support
• Enhanced parental leave
• Annual company retreat and wellbeing benefits

If you’re passionate about building scalable systems, love the balance of autonomy and collaboration, and want to help shape the future of cybersecurity learning — we’d love to hear from you.