Mid-Senior Founding Full-Stack Product Engineer

Our Client is building the worlds first AI-native cybersecurity operating system.

As increasingly capable AI systems become part of critical infrastructure security challenges are evolving faster than traditional solutions can keep up. Our Client is developing next-generation defensive systems powered by AI-native architectures advanced research and novel approaches including LLM Zero Knowledge Verifiers (ZKVs).

Backed by leading investors including Entrepreneur First and the Sequoia Scout Fund alongside strategic angels from companies such as Meta Palantir Isomorphic Labs Asana Samsara and Astranis the company is building from offices in London and San Francisco.

• Location: London United Kingdom (On-site)
• Employment Type: Full-Time
• Level: Mid-Senior
• Compensation: Competitive Salary Founding Equity
• Relocation Support: Available for Candidates with Work-Permit

• Build and maintain the full product experience
• Develop frontend backend and AI-powered workflows
• Design scalable secure and reliable systems
• Shape product architecture and engineering standards

• Build modern web applications using TypeScript and React
• Develop backend services using
• Design and maintain developer-friendly APIs
• Ensure security performance and reliability across the platform

• Collaborate closely with AI engineers
• Integrate AI and LLM capabilities into production products
• Transform research outputs into customer-facing functionality
• Explore how AI-generated code and autonomous systems fit into enterprise environments

• Build secure systems suitable for enterprise deployment
• Support compliance and security requirements
• Improve platform scalability and reliability
• Design infrastructure capable of supporting long-term growth

• Strong full-stack engineering experience
• Deep expertise with TypeScript React and
• Experience designing and building RESTful APIs
• Experience shipping production-grade software
• Strong architectural and product thinking
• Experience working in fast-moving startup environments
• Comfort operating with significant ownership and autonomy

• AI or LLM product integrations
• OpenAI Anthropic or similar production AI systems
• Cybersecurity or enterprise SaaS environments
• Cloud infrastructure experience (Azure AWS or GCP)
• Docker and containerized deployments
• CI/CD pipelines and GitHub Actions
• Terraform or Infrastructure as Code
• Rust experience
• Previous founding engineer experience

We are looking for engineers who:

• Think like product owners
• Use AI tools extensively in their development workflow
• Have strong opinions on architecture and software design
• Enjoy working directly with customers and founders
• Thrive in high-ownership environments
• Prefer building over maintaining
• Move quickly while maintaining quality

• Competitive compensation package
• Meaningful founding equity
• Direct access to founders and leadership
• High-impact ownership from day one
• Opportunity to work on cutting-edge AI and cybersecurity problems
• Fast-moving high-performance environment
• Ability to influence both product and technical strategy

If youre excited about building AI-native cybersecurity products owning systems end-to-end and helping define the future of AI security infrastructure wed love to hear from you...