Staff Frontend Engineer

Staff Frontend Engineer | London | AI-Native SaaS | £150,000 + EquityWe’re partnering with a high-growth, venture-backed AI SaaS company in London as they scale their engineering team. We are currently on the lookout for a Staff Front End hire to join their team.Their platform transforms complex, manual workflows into AI-powered systems used by global enterprise clients. Following rapid growth and a major funding round, they’re now looking for a Staff Frontend Engineer to take ownership of their frontend architecture and help define the next phase of product evolution.With new AI-driven features launching and the product entering a critical scaling phase, this is a rare opportunity to shape the frontend of an AI-native enterprise platform from an architectural level.

What You’ll Do

Own and evolve the frontend architecture of a complex, data-heavy SaaS platform, designing scalable patterns that support long-term product growth.Lead framework-agnostic frontend development (React, Vue or similar), making sound architectural decisions around state management, rendering strategies, and performance optimisation.Design and build AI-native interfaces, integrating LLM-powered workflows such as streaming responses, prompt orchestration, and intelligent automation features.Partner closely with backend and ML engineers to productionise AI functionality securely and reliably within enterprise-grade environments.Establish best practices across testing, observability, CI/CD, and frontend performance to ensure high reliability and maintainability.Contribute to or establish a scalable design system and component architecture.Leverage AI-assisted development tools to accelerate delivery, improve code quality, and modernise engineering workflows.Mentor engineers and raise the technical bar across frontend development, influencing standards and long-term technical direction.What We’re Looking For:7+ years of experience building and scaling modern web applicationsDeep expertise in at least one modern frontend framework (React, Vue, or similar) with strong architectural ownership experienceProven experience leading frontend systems at scale rather than just delivering featuresStrong understanding of performance optimisation, rendering trade-offs, and complex state managementExperience building data-heavy, enterprise-grade interfacesHands-on experience integrating or building with LLMs and AI-powered workflowsExperience using AI-assisted coding tools in a production environmentStrong collaboration skills across Product, Design, Backend, and ML teamsExperience operating within cloud-based, CI/CD-driven environmentsWhy This Role is Exciting:Own frontend architecture at Staff levelShape how enterprise users interact with AI systems in productionJoin during a high-growth scaling phase with meaningful influenceWork on genuinely complex technical problems at the intersection of AI and enterprise softwareHave real impact on technical direction, product experience, and engineering cultureIf you would like to hear more about this opportunity, get in touch.