Software Engineer

Founding C# Engineer - Cybersecurity - Seed-Stage Start-Up

Please double check you have the right level of experience and qualifications by reading the full overview of this opportunity below.

Join an early-stage cybersecurity start-up on a mission to transform how modern organisations detect and respond to threats across cloud and enterprise systems. They're already working with forward-thinking customers - and now we're hiring exceptional engineers to help build the future of security from the ground up.

Why Join

• Join as an early founding engineer, working directly with the founders
• Shape product, architecture, and company culture from day one
• Build for real customers - solving critical problems at scale
• Modern, lean tech stack designed for speed, reliability, and scale
• Competitive salary + meaningful early equity

What You'll Do

• Design, build, and ship high-impact features across the stack
• Architect scalable data and telemetry pipelines
• Collaborate closely with founders and customers to deliver real-world solutions
• Champion engineering excellence - infra-as-code, CI/CD, scalable cloud design
• Move fast, deploy frequently, and focus on customer value over bureaucracy

About You

• 3+ years' experience building backend systems at scale
• Strong in C#, Python, Go, Java or similar backend languages
• Familiar with cloud platforms (AWS, GCP, or Azure)
• Pragmatic engineer who values both speed and quality
• Excited by cybersecurity - no prior experience needed, just curiosity
• London-based or able to collaborate in-person regularly

This is a unique opportunity to join at seed stage, own core systems, and help define how modern security platforms are built.

Founding C# Engineer - Cybersecurity - Seed-Stage Start-Up