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I am a software engineer with over 8 years of hands-on experience in software development, specializing in frontend and backend engineering as well as distributed systems. I have participated in and led multiple projects using modern frameworks and cloud technologies, delivering high-quality, stable, and efficient software solutions. I take pride in building user-friendly interfaces and reliable system architectures that meet both user and business needs. With a strong foundation in distributed computing and algorithmic thinking, I approach challenges with a problem-solving mindset and a commitment to continuous improvement. I collaborate effectively in multicultural, cross-functional teams and value clear communication, technical excellence, and long-term product growth.…I am a software engineer with over 8 years of hands-on experience in software development, specializing in frontend and backend engineering as well as distributed systems. I have participated in and led multiple projects using modern frameworks and cloud technologies, delivering high-quality, stable, and efficient software solutions. I take pride in building user-friendly interfaces and reliable system architectures that meet both user and business needs. With a strong foundation in distributed computing and algorithmic thinking, I approach challenges with a problem-solving mindset and a commitment to continuous improvement. I collaborate effectively in multicultural, cross-functional teams and value clear communication, technical excellence, and long-term product growth.

ChengFeng Tsai

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

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I am a software engineer with over 8 years of hands-on experience in software development, specializing in frontend and backend engineering as well as distributed systems. I have participated in and led multiple projects using modern frameworks and cloud technologies, delivering high-quality, stable, and efficient software solutions. I take pride in building user-friendly interfaces and reliable system architectures that meet both user and business needs. With a strong foundation in distributed computing and algorithmic thinking, I approach challenges with a problem-solving mindset and a commitment to continuous improvement. I collaborate effectively in multicultural, cross-functional teams and value clear communication, technical excellence, and long-term product growth.…I am a software engineer with over 8 years of hands-on experience in software development, specializing in frontend and backend engineering as well as distributed systems. I have participated in and led multiple projects using modern frameworks and cloud technologies, delivering high-quality, stable, and efficient software solutions. I take pride in building user-friendly interfaces and reliable system architectures that meet both user and business needs. With a strong foundation in distributed computing and algorithmic thinking, I approach challenges with a problem-solving mindset and a commitment to continuous improvement. I collaborate effectively in multicultural, cross-functional teams and value clear communication, technical excellence, and long-term product growth.

Available to hire

I am a software engineer with over 8 years of hands-on experience in software development, specializing in frontend and backend engineering as well as distributed systems. I have participated in and led multiple projects using modern frameworks and cloud technologies, delivering high-quality, stable, and efficient software solutions.

I take pride in building user-friendly interfaces and reliable system architectures that meet both user and business needs. With a strong foundation in distributed computing and algorithmic thinking, I approach challenges with a problem-solving mindset and a commitment to continuous improvement. I collaborate effectively in multicultural, cross-functional teams and value clear communication, technical excellence, and long-term product growth.

Skills

Experience Level

Expert

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Language

English

Advanced

Chinese

Advanced

Work Experience

Senior Software Engineer at INVOZONE

July 1, 2025 - July 1, 2025

Led and contributed to full-stack medical clinic web applications using React, Angular, and Vue.js for the frontend and Node.js with NestJS for the backend. Modernized legacy frontend systems into a component-based structure with Stencil to improve code reuse and maintainability. Built automated test suites with Jest, Cypress, and Jasmine to ensure stability. Deployed applications to AWS, Azure, and GCP with Docker and Kubernetes for scalable containerization. Supported migration to Next.js for performance and SEO improvements. Implemented a GraphQL backend with Apollo Server and monitored performance with Google Analytics, applying techniques like code splitting, lazy loading, and image optimization. Collaborated with designers, PMs, and QA engineers to deliver features aligned with business goals. Enhanced system data throughput by 50% and reduced latency by 35% in real-time operations.

Senior Software Engineer at burgitech

June 1, 2022 - June 1, 2022

Developed and maintained web applications including SaaS platforms using Python, Node.js, PHP, MongoDB, MSSQL, AWS DynamoDB, and GraphQL across AWS/Azure. Designed RESTful APIs for robust frontend-backend communication. Collaborated with UX/UI designers, product managers, and backend teams to deliver reliable, user-centered solutions. Built responsive, cross-browser interfaces and integrated third-party APIs for payments, logistics, and analytics. Conducted code reviews, mentored juniors, and applied advanced optimization strategies for React and Angular, including lazy loading, code splitting, efficient state management, and smart data caching. Contributed to blockchain-based smart contracts to support DeFi features and secure transactions. Improved transaction processing speed by 70%, strengthened backend security, and increased blockchain-enabled product adoption by 50%.

Senior Full Stack Engineer at Accellor

March 1, 2020 - March 1, 2020

Developed and maintained SPAs using React and Next.js, built reusable React Hooks, and designed/implemented API endpoints with Node.js, PostgreSQL, GraphQL, and REST. Collaborated across cross-functional teams to deliver scalable front-end and back-end solutions. Enhanced application responsiveness by 25%, accelerated development speed by 40%, and reduced API response time by 30%. Worked on blockchain-based features to support secure DeFi workflows and improved overall performance and reliability.

Backend Engineer at Exante

February 1, 2018 - February 1, 2018

Designed and implemented backend architectures and APIs to strengthen data exchange between internal and external financial systems. Managed and optimized financial databases for large-scale transactions. Enforced strong security practices to ensure GDPR and MiFID II compliance. Contributed to system stability and backend performance improvements, achieving 99.9% uptime and a 50% boost in transaction efficiency, while reducing vulnerabilities by 40%.

Software Developer at Liftango

October 1, 2016 - October 1, 2016

Assisted in developing user interfaces for web and mobile applications, translating design specifications into clean, efficient code. Improved application performance and cross-browser compatibility, reducing load times and boosting user engagement by 35%. Collaborated with senior developers to test, debug, and refine features for production deployment.