Frontend Engineer, Web

About the role

ActAI builds proactive applications for people who are not used to complex prompting, starting with an agent-first mobile communication app. As a Frontend Engineer you will build and maintain web applications across Chat, Notes, Calendar, Docs and Sheets.

Key responsibilities

• Build and maintain web applications across Chat, Notes, Calendar, Docs and Sheets using React and TypeScript
• Develop interactive features such as 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

Required profile

• 3+ years of frontend engineering experience building production web applications
• Experience building interactive interfaces with complex user flows and application state
• Strong debugging skills and ability to maintain frontend reliability in production

Required skills

• React, TypeScript, JavaScript, HTML and CSS
• Frontend architecture, state management and reusable component design
• REST or GraphQL APIs, WebSockets and asynchronous data
• Browser performance, rendering, accessibility and responsive design
• Nice to have: chat, collaboration or document editing apps; rich-text editors, collaborative editing or spreadsheets; Next.js and modern build tools; LLM APIs and streaming AI responses