Founding Engineer

• Take ownership of an existing prototype and evolve it into a production-ready SaaS platform for enterprise customers
• Build and maintain a secure, scalable backend capable of handling sensitive enterprise data
• Design and develop high-quality frontend interfaces that make complex AI outputs intuitive and actionable for users
• Build and maintain deployment pipelines, testing frameworks, monitoring, and observability systems
• Design and implement secure data pipelines with appropriate access controls and auditability
• Ensure the platform meets enterprise-grade security and compliance requirements (ISO 27001, ISO 42001, GDPR)
• Collaborate directly with the founders to define technical architecture and engineering best practices
• Contribute to the development of agentic AI workflows that underpin the platform
• Lay the foundations for future engineering team growth, with scope to progress into a leadership role

What this offers:

• A rare opportunity to join an early-stage AI start-up as the first engineering hire
• Direct collaboration with a high-profile, deeply experienced founding team
• Significant equity upside with strong potential for long-term growth
• A genuinely impactful role shaping both product and technical direction from day one

Applications: If you are a full-stack engineer looking to step into a founding role within a high-potential AI start-up, we would love to hear from you. Please send an up-to-date CV via the relevant link. We're committed to creating an inclusive and accessible recruitment process. If you require reasonable adjustments for your application or during the review process, please highlight this by emailing applications@redtech-recruit.com (if this email address has been removed by the job board, full details for contact are available on our website).

Keywords: Founding Engineer / Full Stack Developer / Full Stack Engineer / Software Engineer / Python / React / TypeScript / JavaScript / FastAPI / AWS / AI / Machine Learning / LLM / SaaS / Start-up / Enterprise Software / Data Pipelines

• Strong academic background with a degree in Computer Science or a related discipline
• Proven experience building production-grade web applications, ideally for enterprise or B2B environments
• Strong full-stack experience with modern technologies, including JavaScript/TypeScript and Python
• Experience with React (frontend) and backend frameworks such as FastAPI or similar
• Experience designing and implementing scalable data pipelines and database structures
• Hands-on experience with cloud infrastructure, ideally AWS
• Strong understanding of security and compliance considerations including ISO 27001 and GDPR
• Ability to work autonomously and make high-impact technical decisions in an early-stage environment
• A genuine interest in building AI-driven products that enhance human decision-making

An exceptional opportunity for a Founding Engineer to join a highly innovative, early-stage AI start-up in Cambridge, working alongside a world-class founding team to build a next-generation enterprise AI platform from prototype to production. This company is led by industry-leading experts whose mission is to help organisations identify, prototype, and deploy AI solutions, becoming a trusted partner for enterprise AI transformation. You will be the first full-time engineering hire, taking ownership of a working prototype and transforming it into a scalable, secure, enterprise-grade SaaS platform. This is a true full-stack role with equal weighting across frontend, backend, and infrastructure, with significant influence over architecture, tooling, and long-term technical direction.