Senior Frontend Engineer — Palo Alto, CA

About Us

5QZ xnhUmCG builds ubFAa, a fintech platform that powers modern brokerage, banking and investment experiences. Our engineering team works across Palo Alto and Shanghai to ship secure, high-performance products used by investors and partners worldwide.

The Role

You'll own the client experience across mobile and web. You'll build ubFAa apps in Flutter (iOS/Android) and modern web frameworks, working closely with product, design and backend teams to deliver fast, reliable and compliant financial interfaces.

What You'll Do

• Build and maintain cross-platform mobile apps in Flutter

• Develop responsive web applications with React + TypeScript (or similar)

• Turn designs into polished, accessible, pixel-accurate UIs

• Build real-time features such as market data, portfolios, order entry and account funding

• Integrate REST/WebSocket APIs and work with backend engineers on API contracts

• Own frontend architecture, including state management, a shared component library, and code shared between Flutter and web where it makes sense

• Make the apps faster, more stable and more secure, including auth, session handling and protection of sensitive data

• Write tests, review code and help improve CI/CD and release processes

• Work with teammates across time zones (Palo Alto ↔ Shanghai)

Required Qualifications

• 5+ years of frontend engineering experience

• 2+ years of production Flutter, with apps shipped to the App Store and Google Play

• Strong web frontend skills: TypeScript/JavaScript, HTML5, CSS3, and React (or Vue/Angular)

• Solid grasp of state management (e.g., Riverpod, Bloc or Provider; Redux, Zustand or React Query)

• Experience with REST, WebSockets and asynchronous data flows

• Familiarity with mobile and web performance profiling and optimization

• Experience with Git, automated testing and CI/CD pipelines

• Strong communication skills and ownership

Nice to Have

• Fintech, brokerage, trading or banking product experience

• Native iOS (Swift) or Android (Kotlin) experience for platform channels

• Flutter Web or design-system/component-library experience

• Knowledge of frontend security (OWASP, secure storage, biometric auth)

• Experience with AWS or other cloud environments