• Reduced the loading time for over 80% by restructure and optimise the front-end data flow with Redux, which led to an

increase in retentions rate for over 20% according to Google Analytics.

• Created and categorised more than 300 reusable React components with JavaScript ES6 and improved future

development speed in similar front-end task for over 50%.

• Designed and reworked the UI/UX, which has achieved a lighthouse performance score of 90/100.

• Designed B2B database schemas and back-end following MVC and implemented the design with Python Django.

• Maintained Postgres SQL, AWS S3 cloud storage, third-party APIs, and kept the website uptime at over 99.999%.

• Followed Agile software development methodology and worked closely with design team, other developers, quality

assurance team, and scrum master; reported and updated to the team daily and at the end of each Sprint.

• Designed, implemented, and deployed a cross-platform social media APP on Android and iOS system within 4 months

with React Native framework, and gained over 500 users in the first month.

• Improved the “post explorer” query time for 85% by restructure the database and backend, which led to an increase in

average screen time for 300%.

• Designed and implemented scalable server-side architecture following Restful API with JavaScript Node.js.

• Developed new key features including offline notification push by integrating APIs including Google map API and

mobile phone local APIs.

• Worked with a start-up team of 7, developed and reviewed system designs, strategies and code with team members in

weekly tech meetings.