Senior Front End Engineer

Key responsibilities

• Own the front end architecture: component structure, state management, API and WebSocket handling, and a shared design system across web and mobile
• Build and ship the core trading screens: market watch, stock detail, order entry, order status, portfolio, and funding
• Design for money—order forms, confirmations and error messages must make it hard to make a costly mistake and easy to understand what just happened
• Take features from rough idea to production, including accessibility, performance, analytics and crash monitoring
• Turn vague requests into clear flows through sketching, prototyping, and testing with real users
• Work closely with backend engineers on API contracts

About you

• 7+ years building production front ends
• Expertise in TypeScript: strict typing, sound domain modeling, and the judgment to keep types useful rather than clever
• Knowledge in modern component frameworks such as React or React Native, with a firm grip on state management, rendering performance and testing
• Expertise in shipping iOS and Android apps, including knowledge of App Store and Google Play release process, platform conventions, push notifications, secure storage, and mobile app behavior on weak connections
• Strong UX instincts—ability to map a user's journey, spot friction, and justify design decisions with evidence
• A real sense of design: layout, spacing, typography, color, motion and hierarchy
• Experience with real-time data over WebSockets or similar, including reconnects, stale data and out-of-order messages
• Comfort with design tools such as Figma, and the ability to work from a design or push back on one with a better idea
• Practical fluency with AI tools—able to leverage AI coding assistants, prototyping tools and other AI aids for drafting components, writing tests, refactoring, or exploring several UI options