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I am a Full Stack Engineer with 3+ years of experience designing and delivering scalable, user-centric web applications using JavaScript, React.js, Node.js, and TypeScript. I specialize in REST APIs, microservices, CI/CD pipelines (Jenkins, GitHub Actions), and cloud platforms like AWS. I have a proven ability to modernize legacy systems, boost performance, reduce onboarding time, and strengthen fraud prevention, while collaborating effectively in Agile teams.…I am a Full Stack Engineer with 3+ years of experience designing and delivering scalable, user-centric web applications using JavaScript, React.js, Node.js, and TypeScript. I specialize in REST APIs, microservices, CI/CD pipelines (Jenkins, GitHub Actions), and cloud platforms like AWS. I have a proven ability to modernize legacy systems, boost performance, reduce onboarding time, and strengthen fraud prevention, while collaborating effectively in Agile teams.

Simon Liu

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

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I am a Full Stack Engineer with 3+ years of experience designing and delivering scalable, user-centric web applications using JavaScript, React.js, Node.js, and TypeScript. I specialize in REST APIs, microservices, CI/CD pipelines (Jenkins, GitHub Actions), and cloud platforms like AWS. I have a proven ability to modernize legacy systems, boost performance, reduce onboarding time, and strengthen fraud prevention, while collaborating effectively in Agile teams.…I am a Full Stack Engineer with 3+ years of experience designing and delivering scalable, user-centric web applications using JavaScript, React.js, Node.js, and TypeScript. I specialize in REST APIs, microservices, CI/CD pipelines (Jenkins, GitHub Actions), and cloud platforms like AWS. I have a proven ability to modernize legacy systems, boost performance, reduce onboarding time, and strengthen fraud prevention, while collaborating effectively in Agile teams.

Available to hire

I am a Full Stack Engineer with 3+ years of experience designing and delivering scalable, user-centric web applications using JavaScript, React.js, Node.js, and TypeScript.
I specialize in REST APIs, microservices, CI/CD pipelines (Jenkins, GitHub Actions), and cloud platforms like AWS. I have a proven ability to modernize legacy systems, boost performance, reduce onboarding time, and strengthen fraud prevention, while collaborating effectively in Agile teams.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Advanced

Work Experience

Full Stack Engineer at American Express

May 1, 2025 - October 24, 2025

Migrated enterprise applications from AngularJS to React.js, improving UI responsiveness and system performance by 40%. Built reusable UI components with React, Redux, and TypeScript, cutting development time for new features by 25%. Developed server-side rendered apps (Next.js), reducing initial load time by 40% and improving SEO. Integrated file upload workflows with React Drop-Zone. Implemented responsive design and advanced CSS media queries for mobile optimization. Improved API response handling and data rendering to reduce latency. Partnered with UX designers using Figma to translate wireframes into functional UI. Achieved 100% automated test coverage with Jest & React Testing Library, reducing post-release issues by 25%. Collaborated with backend engineers to ensure seamless API integration and microservices communication.

Full Stack Engineer at American Express

May 1, 2024 - October 24, 2025

Designed and deployed secure REST APIs with Node.js, Express.js, and JWT authentication, strengthening fraud detection systems. Automated onboarding processes with Python and shell scripting, reducing setup time by 70%. Managed containerized deployments (Docker, Nginx) and automated pipelines with Jenkins & GitHub Actions, ensuring reliable releases. Utilized Splunk for real-time monitoring and performance optimization, improving system reliability. Built internal tools for data management and reporting, enhancing fraud and risk operations. Contributed to Agile sprints using Rally, applying Scrum best practices to meet deadlines efficiently.