Weifang Tang

• Implemented advanced functionality and ensured the production of top-notch, error-free code for a scientific authoring system built with node.js on AWS and Angular on the front end
• Developed efficient algorithms and data structures to optimize performance of calculations in various features
• Enhanced codebase by refactoring existing code, resulting in simplified task completion and facilitating feature extension

Developed solutions for enterprise software systems, including a real-time video meeting system based on Agora. Focused on the backend using Node.js, MongoDB, Redis, Google Firestore and AWS services

• Improved overall system performance by tuning the DB queries, batching requests to Firestore, processing certain tasks synchronously and better use of Memory Cache
• Increased supported users per show room from less than 100 to several thousands
• Reduced room creation time for power users from 40 seconds to 1 second

Developed and maintained a Gym member management software system utilizing AWS Kinesis data stream as an event bus.

Tech stack: Node.js, Typescript, AWS, DynamoDB, Micro Service

• Improved maintainability of backend services
• Reduced billing batching service processing time from 10 minutes to 20 seconds
• Promoted testing practices in the team

Worked as a full stack developer responsible for front end development, backend development and DevOps tasks. Maintained a micro-front end framework using React. Developed and maintained related services using Node.js and .Net Core deployed on AWS using Kubernetes. Also responsible for writing automation tests, as there were no dedicated testers in the team.

Used tech stack: React, Node.js, Kubernetes and AWS

• Improved routing management service
• Improved framework performance, front page loading time reduced from 10 seconds to less than 4 seconds

Developed and maintained an software system for managing software licenses, built using serverless framework and deployed on AWS.

• Responsible for carrying out Sprint planning, code reviewing and technical decision on sub-systems
• Built a billing sub-system
• Improved code quality of an old sub-system for maintainability

Worked on a video streaming website built with PHP and MySql

• Improved code readability for core business logics
• Developed an iOS messaging app for the site owner to communicate with customers more conveniently

Developed and maintained several video games

• Worked as a performance optimization guy in several games, had a lot of chances to dive into low level details of computer systems
• Worked on big title games with more than 1 million online users
• Twice 5 star employee of the year