Full Stack React Developer

Senior Full-Stack React Developer (Outside IR35) Contract: Outside IR35 Location: Remote (UK / Europe) Duration: Initial 3-6 months (likely extension) Day Rate: Competitive, dependent on experience Client: AI Consultancy Partner Product: BengoAI (AI Research & Customer Intelligence Platform) Overview We are working with a growing AI consultancy who are looking for a Senior Full-Stack React Developer to support the continued development of their AI research product, BengoAI. BengoAI enables organisations to transform complex research outputs into interactive customer profiles, helping teams make better, data-driven business decisions. The product is already in use within enterprise environments and is continuing to scale. You will join a small, highly collaborative product team made up of designers, data scientists and a product lead. This role offers a high level of autonomy, technical ownership and influence over product direction. This is an Outside IR35 contract role, ideal for an experienced contractor who enjoys working on modern, AI-driven SaaS products. Responsibilities You will be expected to: Design, build and deliver new product features in collaboration with data science and product teams Develop and deploy bug fixes and security patches in a timely manner Contribute to product roadmap planning from a technical perspective Take ownership of the testing strategy, including unit and integration testing Lead and evolve the software development lifecycle (SDLC) Support customers with technical issues where required Act as a senior technical voice within the team, guiding decisions and best practices Communicate clearly and effectively, asking questions and challenging assumptions where appropriate Skills & Experience Required You must be able to demonstrate: 6+ years' experience in full-stack development (enterprise software or SaaS products) Strong commercial experience with: TypeScript React and Next.js Node.js Azure Pulumi Proven experience building secure, production-grade applications Solid experience writing unit and integration tests (e.g. Jest, Mocha) Hands-on experience deploying and managing both front-end and back-end services Experience working with Supabase Strong communication skills and experience working in collaborative, cross-functional teams Nice to Have Experience working on AI, data or research-driven products Previous experience in small product teams or consultancies Exposure to modern DevOps and cloud-native architectures *Rates depend on experience and client requirements