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I am Cheng Feng Tsai, a software developer based in Taipei, Taiwan, with over 8 years of hands-on experience in web and mobile full-stack development using TypeScript and Python. I have participated in and led projects using modern frameworks and cloud technologies, delivering high-quality, stable, and efficient software. I enjoy building user-friendly interfaces and reliable system architectures that meet both user and business needs. I thrive in multicultural, cross-functional teams, value clear communication and technical excellence, and focus on long-term product growth.…I am Cheng Feng Tsai, a software developer based in Taipei, Taiwan, with over 8 years of hands-on experience in web and mobile full-stack development using TypeScript and Python. I have participated in and led projects using modern frameworks and cloud technologies, delivering high-quality, stable, and efficient software. I enjoy building user-friendly interfaces and reliable system architectures that meet both user and business needs. I thrive in multicultural, cross-functional teams, value clear communication and technical excellence, and focus on long-term product growth.

Cheng feng Tsai

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

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I am Cheng Feng Tsai, a software developer based in Taipei, Taiwan, with over 8 years of hands-on experience in web and mobile full-stack development using TypeScript and Python. I have participated in and led projects using modern frameworks and cloud technologies, delivering high-quality, stable, and efficient software. I enjoy building user-friendly interfaces and reliable system architectures that meet both user and business needs. I thrive in multicultural, cross-functional teams, value clear communication and technical excellence, and focus on long-term product growth.…I am Cheng Feng Tsai, a software developer based in Taipei, Taiwan, with over 8 years of hands-on experience in web and mobile full-stack development using TypeScript and Python. I have participated in and led projects using modern frameworks and cloud technologies, delivering high-quality, stable, and efficient software. I enjoy building user-friendly interfaces and reliable system architectures that meet both user and business needs. I thrive in multicultural, cross-functional teams, value clear communication and technical excellence, and focus on long-term product growth.

Available to hire

I am Cheng Feng Tsai, a software developer based in Taipei, Taiwan, with over 8 years of hands-on experience in web and mobile full-stack development using TypeScript and Python. I have participated in and led projects using modern frameworks and cloud technologies, delivering high-quality, stable, and efficient software.

I enjoy building user-friendly interfaces and reliable system architectures that meet both user and business needs. I thrive in multicultural, cross-functional teams, value clear communication and technical excellence, and focus on long-term product growth.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Advanced

Chinese

Fluent

Japanese

Advanced

Work Experience

Freelance Software Engineer at Self Employed

July 1, 2015 - Present

Built job platform in Django REST Framework and React. Updated Laravel backend to Django. Built chat app using WebSocket, implemented calendar integration, and platform video meeting using WebRTC. Contributed to admin dashboard via Vue3 and Charts.js and developed a mobile app using React Native and Expo.

Senior Software Engineer at Eagle App

June 1, 2022 - July 1, 2025

Contributed to a CEX crypto trading platform using FastAPI and Nuxt.js. Integrated AI chatbot in both frontend and backend using OpenAI and Gemini APIs. Built mobile app with Flutter, achieving 5,000+ weekly downloads. Led development of ecommerce and insurance management platforms using Next.js and Nest.js with MySQL. Implemented Redis caching, server-side rendering, and GraphQL API with Apollo.

Senior Software Engineer at Juding Information Co., Ltd.

March 1, 2020 - June 1, 2022

Built real-estate platform using Express.js and Vue.js/Nuxt.js. Implemented automated key scanner and auto translation, used Rollup with Vite for optimized builds. Developed desktop admin dashboard using Electron. Collaborated with UI, Test, Product and Security teams to deliver on deadline.

Full Stack Engineer at Lockists Co., Ltd.

February 1, 2018 - March 1, 2020

Built attendance management system using Nest.js and Next.js, with PostgreSQL. Developed mobile app using Flutter. Implemented backend caching with Redis, optimized DB requests, and used Docker for cross-platform development. Built custom React Hooks and used Redux for global state and Context API for component state.