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Versatile Full-Stack Engineer with 4+ years of experience building scalable web and mobile applications. Expert in ReactJS and React Native using TypeScript and React Hooks; backend development with Python (Flask, FastAPI) and Java (Spring Boot); and delivery automation via Docker, Kubernetes/OpenShift, and AWS. Skilled in CI/CD pipeline design, test automation, and collaborative agile workflows.…

Penggao (Connor) Yuan

App Developer, Full Stack Developer, Developer, +5

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Versatile Full-Stack Engineer with 4+ years of experience building scalable web and mobile applications. Expert in ReactJS and React Native using TypeScript and React Hooks; backend development with Python (Flask, FastAPI) and Java (Spring Boot); and delivery automation via Docker, Kubernetes/OpenShift, and AWS. Skilled in CI/CD pipeline design, test automation, and collaborative agile workflows.…

Available to hire

Versatile Full-Stack Engineer with 4+ years of experience building scalable web and mobile applications. Expert in
ReactJS and React Native using TypeScript and React Hooks; backend development with Python (Flask, FastAPI) and
Java (Spring Boot); and delivery automation via Docker, Kubernetes/OpenShift, and AWS. Skilled in CI/CD pipeline
design, test automation, and collaborative agile workflows.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Work Experience

Software Developer at Knewplay

January 1, 2025 - Present

Designed and implemented enterprise-grade applications focusing on scalable microservices and secure RESTful APIs that support financial onboarding workflows. Built reusable Python automation components and integrated system monitoring and logging features to enhance observability. Developed secure authentication mechanisms using JWT and refresh tokens for strong session management. Applied CI/CD automation with GitHub Actions and Jenkins to improve release cycle efficiency and code quality. Collaborated in Agile sprints with cross-functional teams contributing to system architecture and API design discussions. Engineered a resilient and observable authentication module that significantly enhanced system security and performance in distributed deployments.

Software Developer (ATD) at Double Negative LTD

August 31, 2024 - August 29, 2025

Designed Python automation tools to optimize system and pipeline performance, effectively eliminating bottlenecks and manual tasks. Maintained and optimized Jenkins CI/CD pipelines and integrated static code analysis tools such as SonarQube and Snyk. Supported large-scale distributed environments with monitoring and deployment automation using Docker. Participated in code reviews and regression testing to ensure production-quality tools. Successfully developed and deployed a scalable automation tool that improved pipeline efficiency and reduced error rates by 30%.

Front End Developer / Full-Stack Developer at Multifood Supermarket

May 31, 2021 - August 29, 2025

Created a ReactJS-based e-commerce site with responsive user interface and dynamic data rendering. Developed Spring Boot APIs for inventory and user management including SQL query optimizations and secure endpoints. Integrated performance monitoring and optimized frontend load time using code splitting and caching strategies. Led frontend performance refactor initiatives, which improved customer retention and reduced page load times by 20%.

Software Developer (Full-Stack) at Knewplay

January 1, 2025 - November 3, 2025

Architected and maintained full-stack features: React Native mobile and ReactJS web interfaces with TypeScript and React Hooks; developed Python FastAPI microservices with JWT authentication and OpenAPI documentation; integrated frontend and backend via REST endpoints; built and deployed infrastructure with Docker, Kubernetes/OpenShift, and AWS; implemented end-to-end tests with Jest, React Testing Library, and Maestro; automated CI/CD pipelines in GitHub Actions.

Software Developer (Automation & Tooling) at Double Negative LTD

August 1, 2024 - August 1, 2024

Developed Python automation tools to streamline VFX workflows; authored Linux shell scripts to automate deployment and maintenance tasks in Jenkins CI/CD pipelines; enhanced build processes with static analysis integration and containerized test environments; delivered automated test suites with JUnit and Python unittest.

Front End Developer at Multifood Supermarket

May 1, 2021 - May 1, 2021

Developed a ReactJS-based e-commerce platform with responsive UI, performance optimizations, and dynamic data rendering; created reusable components and managed global state with Redux; integrated performance monitoring to track metrics.