Frontend Engineer, Web
About this role
About Act
There are over 5 billion users using basic applications today such email, notes, tasks, calendar and they're not AI-native. Our mission is to build proactive applications for anyone in the world, who are not used to complex prompting. We aim to bring intelligence to conversations, errands, organising and workflows, with minimal to no prompting.
Our first application is an agent-first mobile communication app. We believe building applications that users use daily for communication, coordination and collaboration needs will help integrate AI into their lives. The net effect is to eliminate misinformation, achieve low coordination costs, enable high quality tasks and collaboration at scale with minimal or little prompting.
Role
Build and maintain web applications across Chat, Notes, Calendar, Docs and Sheets using React and TypeScript
Develop interactive features including real-time messaging, rich-text editing, scheduling, tables and spreadsheets
Build reusable frontend components and architecture across multiple applications
Integrate backend APIs, WebSockets and streaming AI responses into product workflows
Manage complex application state, real-time updates and data synchronisation
Optimise frontend performance, responsiveness and compatibility across browsers and devices
Work with product, design and backend engineers to develop, test and release new features
Requirements
3+ years of frontend engineering experience building production web applications
Strong proficiency in React, TypeScript, JavaScript, HTML and CSS
Experience with frontend architecture, state management and reusable component design
Experience building interactive interfaces with complex user flows and application state
Experience integrating REST or GraphQL APIs, WebSockets and asynchronous data
Understanding of browser performance, rendering, accessibility and responsive design
Strong debugging skills and ability to maintain frontend reliability in production
Nice to Have
Experience building chat, collaboration, productivity or document editing applications
Experience with rich-text editors, collaborative editing or spreadsheet interfaces
Experience with Next.js and modern frontend build tools
Experience integrating LLM APIs, streaming AI responses or AI-powered product features
Originally posted on Himalayas
