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I am a senior frontend engineer with 10+ years of hands-on experience building scalable, high-performance web applications. I specialize in React and TypeScript, with deep expertise in component design, state management, and performance optimization. I also have strong backend exposure (Java, Python/FastAPI) and enjoy delivering end-to-end features from architecture design to deployment. I thrive in remote-first environments and am passionate about writing clean, maintainable code and solving complex UI/UX and data-flow challenges. Currently exploring frontend and full-stack opportunities in Germany and Switzerland, focusing on modern frontend architectures, robust system designs, and cloud-native deployments, while collaborating closely with product and design teams.…I am a senior frontend engineer with 10+ years of hands-on experience building scalable, high-performance web applications. I specialize in React and TypeScript, with deep expertise in component design, state management, and performance optimization. I also have strong backend exposure (Java, Python/FastAPI) and enjoy delivering end-to-end features from architecture design to deployment. I thrive in remote-first environments and am passionate about writing clean, maintainable code and solving complex UI/UX and data-flow challenges. Currently exploring frontend and full-stack opportunities in Germany and Switzerland, focusing on modern frontend architectures, robust system designs, and cloud-native deployments, while collaborating closely with product and design teams.

Haonan Wu

Front-End Developer, Full Stack Developer, Web Developer, +2

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I am a senior frontend engineer with 10+ years of hands-on experience building scalable, high-performance web applications. I specialize in React and TypeScript, with deep expertise in component design, state management, and performance optimization. I also have strong backend exposure (Java, Python/FastAPI) and enjoy delivering end-to-end features from architecture design to deployment. I thrive in remote-first environments and am passionate about writing clean, maintainable code and solving complex UI/UX and data-flow challenges. Currently exploring frontend and full-stack opportunities in Germany and Switzerland, focusing on modern frontend architectures, robust system designs, and cloud-native deployments, while collaborating closely with product and design teams.…I am a senior frontend engineer with 10+ years of hands-on experience building scalable, high-performance web applications. I specialize in React and TypeScript, with deep expertise in component design, state management, and performance optimization. I also have strong backend exposure (Java, Python/FastAPI) and enjoy delivering end-to-end features from architecture design to deployment. I thrive in remote-first environments and am passionate about writing clean, maintainable code and solving complex UI/UX and data-flow challenges. Currently exploring frontend and full-stack opportunities in Germany and Switzerland, focusing on modern frontend architectures, robust system designs, and cloud-native deployments, while collaborating closely with product and design teams.

Available to hire

I am a senior frontend engineer with 10+ years of hands-on experience building scalable, high-performance web applications. I specialize in React and TypeScript, with deep expertise in component design, state management, and performance optimization. I also have strong backend exposure (Java, Python/FastAPI) and enjoy delivering end-to-end features from architecture design to deployment. I thrive in remote-first environments and am passionate about writing clean, maintainable code and solving complex UI/UX and data-flow challenges.

Currently exploring frontend and full-stack opportunities in Germany and Switzerland, focusing on modern frontend architectures, robust system designs, and cloud-native deployments, while collaborating closely with product and design teams.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Frontend Engineer (Open to Work) at Self-initiated /Independent Work

January 1, 2025 - Present

Actively exploring frontend and full-stack opportunities across Germany and Switzerland. Designing and implementing advanced personal projects using React and TypeScript, showcasing expertise in scalable component design and state management. Practicing system design and performance optimization for production-scale applications. Exploring advanced prototyping and cloud-native deployment scenarios.

Frontend Engineer at Ulab

January 1, 2021 - December 1, 2024

Developed complex frontend features for a medical platform using React, TypeScript, Redux Toolkit, and Vite. Designed and implemented reusable component systems, improving maintainability and development speed. Integrated WebAssembly for 3D mesh computation, reducing rendering time from 1.2s to 700ms. Built and optimized critical user flows, improving responsiveness and user experience. Implemented performance optimizations including code splitting, lazy loading, and asset optimization. Automated CI/CD pipelines using GitHub Actions, significantly streamlining build, test, and deployment processes. Drove end-to-end feature delivery through collaboration with backend, product, and design teams.

Frontend Developer at Key Studio

November 1, 2017 - May 1, 2020

Built scalable web and mobile applications using React, React Native, and TypeScript. Developed reusable UI components, custom hooks, and shared libraries. Implemented complex state management with Redux Toolkit. Integrated RESTful APIs and GraphQL, handling async data flows and error states. Optimized performance via memoization and lazy loading. Participated in full SDLC and deployment. Also contributed to backend integration with FastAPI, OAuth2, and Java services for robust full-stack features.

Web Developer at RoseFinsh

January 1, 2014 - November 1, 2017

Enterprise full-stack development using Java (Spring Boot), AngularJS, and Vue.js. Designed and optimized RESTful APIs and MySQL queries for high-volume real-time data visualization tools and dashboards. Built interactive dashboards and real-time data visualization modules. Focused on reusable frontend modules and maintainability. Wrote unit tests and supported CI/CD pipelines.