Have you been a founding/lead Full Stack Engineer in an exciting start-up / scale up?Does working for a heavily backed, forward thinking AI company in London excite you?Are you looking to help scale and deliver new features that delight users?If so, read on…This is a full-time, on-site role, requiring five days per week in our London office.Salary: £100,000 - £120,000, based on experienceBenefits include Company equityThe client Leveraging next-generation artificial intelligence, they deliver transformative insights and seamless user experiences, setting a new benchmark for the industry.As they experience rapid growth, this client is looking for a Senior Fullstack Engineer to help scale and deliver new features that delight users.The Team You'll Be JoiningThe team is comprised of experienced leaders and engineers from top-tier companies and research institutions, bringing deep expertise in AI, machine learning, and software development. Backed by leading venture capital firms, we are a revenue-generating start-up with strong financial backing and years of runway.Joining this team means tackling exciting technical challenges at the intersection of user experience, machine learning, and infrastructure, all within a fast-paced, collaborative environment that values learning and excellence.Your RoleAs a Senior Fullstack Engineer, you’ll play a pivotal role in building and optimizing systems to meet growing user demand. Your responsibilities will include:Designing and implementing backend APIs while collaborating with the edge-computing team.Creating user-facing front-end interfaces in partnership with the product team.Ensuring the system is scalable, reliable, and has robust observability.Delivering high-quality features with thorough testing and debugging.What We’re Looking ForWe’re seeking a highly motivated engineer with:3+ years of industry experience, building scalable systems.Strong knowledge of backend technologies, particularly Python or Go.Experience working with databases such as Postgres and Redis.Proficiency in front-end technologies, including Typescript, react-query, React, and modern build tools.Bonus Skills (helpful but not essential):Familiarity with infrastructure-as-code solutions (e.g., Pulumi on AWS).Experience with mobile development (e.g., React Native).Exposure to platform engineering, C++, or video streaming technologies.What We OfferCompetitive salary: £100,000 - £120,000, based on experience.Equity in a fast-growing, innovative company.100% employer-paid private dental and vision insurance.Join in redefining what’s possible with AI-powered systems. Apply today!