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Hi, I'm Kaiwen Shen, a Senior Full Stack Engineer with over 10 years of experience in building scalable and high-performance web applications. I specialize in JavaScript, React, Python, Django, and cloud-native technologies. I enjoy optimizing performance and leading development teams in Agile environments to deliver user-centric solutions that drive business results. I’m passionate about clean code, architecture design, and mentoring junior engineers to elevate team capabilities. When I’m not coding, I collaborate closely with product managers and designers to build responsive and mobile-friendly platforms that users love.…Hi, I'm Kaiwen Shen, a Senior Full Stack Engineer with over 10 years of experience in building scalable and high-performance web applications. I specialize in JavaScript, React, Python, Django, and cloud-native technologies. I enjoy optimizing performance and leading development teams in Agile environments to deliver user-centric solutions that drive business results. I’m passionate about clean code, architecture design, and mentoring junior engineers to elevate team capabilities. When I’m not coding, I collaborate closely with product managers and designers to build responsive and mobile-friendly platforms that users love.

Kaiwen Shen

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

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Hi, I'm Kaiwen Shen, a Senior Full Stack Engineer with over 10 years of experience in building scalable and high-performance web applications. I specialize in JavaScript, React, Python, Django, and cloud-native technologies. I enjoy optimizing performance and leading development teams in Agile environments to deliver user-centric solutions that drive business results. I’m passionate about clean code, architecture design, and mentoring junior engineers to elevate team capabilities. When I’m not coding, I collaborate closely with product managers and designers to build responsive and mobile-friendly platforms that users love.…Hi, I'm Kaiwen Shen, a Senior Full Stack Engineer with over 10 years of experience in building scalable and high-performance web applications. I specialize in JavaScript, React, Python, Django, and cloud-native technologies. I enjoy optimizing performance and leading development teams in Agile environments to deliver user-centric solutions that drive business results. I’m passionate about clean code, architecture design, and mentoring junior engineers to elevate team capabilities. When I’m not coding, I collaborate closely with product managers and designers to build responsive and mobile-friendly platforms that users love.

Available to hire

Hi, I’m Kaiwen Shen, a Senior Full Stack Engineer with over 10 years of experience in building scalable and high-performance web applications. I specialize in JavaScript, React, Python, Django, and cloud-native technologies. I enjoy optimizing performance and leading development teams in Agile environments to deliver user-centric solutions that drive business results.

I’m passionate about clean code, architecture design, and mentoring junior engineers to elevate team capabilities. When I’m not coding, I collaborate closely with product managers and designers to build responsive and mobile-friendly platforms that users love.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Senior Full Stack Engineer at Motor Platform Ltd

July 31, 2025 - July 11, 2025

Architected and developed a highly responsive React.js front-end and Python (Django) microservices, increasing platform performance by 40%. Led modernization from a monolithic Node.js backend to distributed Django microservices. Integrated AWS services (Lambda, S3, DynamoDB) for serverless, event-driven architecture, reducing infrastructure costs by 30%. Integrated B2B client systems with backend services focusing on SSO and embedded web apps. Designed real-time notifications using WebSockets and Redis Pub/Sub. Automated CI/CD pipelines with GitHub Actions, cutting deployment time by 50%. Conducted architectural reviews and enforced best practices, reducing incidents by 25%. Collaborated with Product Managers and Designers to deliver mobile-first responsive design, improving mobile conversion rates by 18%. Implemented authentication and authorization using JWT and OAuth 2.0. Mentored junior engineers, enhancing team technical strength and code quality.

Senior Full Stack Engineer at Vivino

January 1, 2020 - July 11, 2025

Built React.js interfaces integrated with Django REST Framework APIs. Optimized Elasticsearch queries, reducing search response times by 30%. Refactored AngularJS components to React.js with Redux for better maintainability. Implemented server-side rendering with Next.js, improving SEO rankings and page load speed. Developed large-scale web applications using TypeScript, JavaScript, HTML, and CSS. Utilized browser debugging tools to troubleshoot and optimize client-side performance.

Software Engineer at CSE Insurance Group

January 1, 2019 - July 11, 2025

Revamped legacy web applications migrating them to React.js and Node.js/Express microservices. Developed secure policy management APIs and integrated payment workflows with Stripe. Optimized React front-end rendering and reduced bundle size by 20% through code splitting and lazy loading. Built role-based access control systems ensuring fine-grained user permissions. Led weekly code reviews to improve code quality and collaboration.

Full Stack Developer at Blip Technologies

June 1, 2018 - July 11, 2025

Created real-time React dashboards for IoT sensor data using WebSocket communication. Designed MongoDB data models optimized for time-series data. Developed Python (Flask) APIs to process telemetry data from thousands of devices. Implemented AWS Lambda serverless functions for device health checks and alerts. Led containerization initiatives with Docker, streamlining deployment workflows.

Software Developer at HangarA

June 1, 2016 - July 11, 2025

Built web-based booking and maintenance tracking systems using React.js and Nest.js REST APIs. Improved user onboarding with a guided signup wizard. Optimized PostgreSQL database queries for better performance under heavy load. Developed internal tools for flight scheduling and maintenance, saving over 15 hours weekly. Integrated third-party aviation data APIs to enhance platform features.