Sr. Front End Engineer

About Knotch We're a growth-stage technology company helping brands optimize content performance and apply AI to modern marketing. Our culture is fast-paced, entrepreneurial, and highly adaptable—we move quickly, test ideas, and evolve with our customers. Through the Knotch platform, brands can measure the impact of their content, identify what drives results, and continuously improve performance across channels. By combining performance data, strategic insights, and AI-driven capabilities, we help marketing teams make smarter decisions and get more impact from every piece of content they produce. About the position You'll split your time between two front ends at very different stages. Knotch ACE, generates web experiences from AI in real time. Rather than serving fixed pages, our backend streams typed component descriptions and the front end assembles them into a React tree as they arrive. It's Next.js App Router and TypeScript in a monorepo, live for several enterprise brands, each with its own theming and deployment. Knotch One is a mature React application that customers use daily, built on Redux, GraphQL and styled-components, with data visualization at its core. Between them there's a good mix of greenfield design work and the kind of careful change you make in a codebase with real users. We're looking for someone who's happy doing both. Responsibilities Build features across both applications, working to each one's existing conventions. Develop the component system that renders streamed, AI-generated layouts — schemas, renderers, and the contracts between them. Work on multi-tenant theming: design tokens, per-brand configuration, client-specific variants. Build and maintain embeds that run our product inside customer websites. Set standards for testing, accessibility, and performance. Work with backend engineers on API and streaming contracts, including where the line between front end and backend actually sits. Write the approach down before you build it, and raise blockers, risks and disagreements early rather than after they've cost time. Ramp yourself up on unfamiliar parts of the product and codebase, and mentor others through code review, pairing, and written design. How we Work Knotch moves quickly and the team is small, so you'll wear a few hats — you'll own features end to end, work directly with backend, data and product, and see what you build in front of enterprise clients in weeks rather than quarters. That pace runs on writing....

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