Web Application Development

BAIBAI

Crypto
Cryptocurrency Exchange

Engagement model: Project-based – fixed price and ongoing support
Customer: A Financial Company in Hong Kong

Baibai is the cryptocurrency exchange website where users can buy/sell Bitcoin and other altcoins.
Baibai adds a level of unprecedented security on top of a convenient marketplace solution.

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Overview Image

What The Client Required

A Financial Company in Hong Kong:

  • Deposit, withdraw, transfer cryptocurrency
  • Buy/sell Bitcoin and other alt coins
  • Protect user wallet and other attack methods by using 2FA
  • Referral program for user by level
  • Handle dispute when make a trade
  • Real time data update
  • Highload system
  • Online support 24/7
  • Provide a new way to buy/sell bitcoin
  • Chat between 2 users and supporter
  • Admin can control fee, limit and other settings real time
  • Verify user info
  • Full responsive website
  • Multiple language
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Our Technologies

Specifically, the Saigon Technology team utilized the following technologies for the project:

  • ASP.NET core 2.1
  • Amazon cloud service (RDS, Multi deployment A-Z, Docker)
  • Load balancing
  • Scalable system
  • Microservices 
  • Angular 5
  • Zendesk integration 
  • SQL server 
  • Bitcoin network
  • Stress test by Jmeter 
  • Redis cache cluster
  • Rabbit MQ
  • Unit of work
  • Database cluster
  • SignalR 
  • Multi thread 
  • YouTrack

Challenges

  • Get passed customer target:
    • 1.000.000 visitors per second
    • 2.500 online users
    • 10 trades completed per second
    • All pages must render below 5s, all action must execute below 3s
    • UI/UX must 100% like the design on the mobile, desktop, tablet, and on all browsers (Some special likes: UC browser…)
  • Protect user info, user wallet by all common attack methods
  • Need to understand about Bitcoin network and cryptocurrency exchange
  • Customer rebrands website with new look & feel
  • Deadline very shoot but the quality must good
  • China's government blocks some Google services
  • Need to research and config all Amazon cloud services
  • Multi threads on multiple servers access the same data to modify/get data
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Solutions

  • Build solution based on microservice architecture
  • Split application to the module to lazy loading
  • Optimize code, restructure component, database and apply best practice
  • Move all needed data to Redis cache cluster to speed up read side
  • Apply Rabbit MQ to speed up write side
  • Research and study Amazon cloud services, Coin service, Bitcoin network
  • Control task, member, sprint, and the deadline by SCRUM model and YouTrack tool
  • Use Memcache and Redis cache to store data for a while (2s), then a background job will collect and process data later
  • Use another service that can run well in China

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