Trip+, Senior Backend Developer, May 2015 ~ Sep 2020
Point & miles online store, Jan 2018 ~ Sep 2019
- The only one authorized store in Chinese market with real-time miles transaction
- Multi-gateway (Stripe, Square) checkout flow which selects gateway by credit card issuing country to save transaction fee
- Fraud radar which has blocked fraud groups and secured 1M+ USD
- Co-worked with airline award program team (Avios and LifeMiles) for API integration
Chatbot service from scratch, Mar 2019 ~ Jun 2019 (hundreds of daily users)
- Conversational and contextual query development with integrating state machine and 3rd party messaging and NLP services
- Solution research and architecture design. Reduced annual cost from $5,000 to $600.
- Leading backend team (2 members), DevOp, RESTFul API, Documentation
Point & miles UGC platform ,Oct 2018 ~ Mar 2019 (hundreds of daily users)
- Credit card recommendation algorithm based on user preference and reading content
- Architecture optimization
- Offloaded routine work to serverless service (AWS Lambda) and reduced Redis cache
- Reduced cost $50+ / month
- Leading backend team (1 member), DevOp, RESTFul API, co-working product SPEC
Miles based flight search engine, May 2015 ~ Oct 2018 (thousands of monthly users)
- Algorithm development for award ticket achievement. 2.5x faster to get award ticket.
- OTA API integration includes Priceline, Skyscanner, Kiwi and Sabre
- Airfare crawlers development for EVA air, Japan Airlines and Expedia
- Performance optimization. Calculating 225K awards and 0.5M flight routes in 1 second
- Wallet crawlers for 20 airline award programs
- Headless browser, proxy and captcha-crack services integration for crawlers
- Leading backend team (1 member), DevOp, RESTful API, unit testing, co-working with frontend and designer for product SPEC
- Business development with Priceline, HotelsCombined, MilesWallet (acquired)
Technology
- AWS, EC2, Load Balancer, RDS (PostgreSQL), S3, Elastic Beanstalk, Route53, Lambda, CloudWatch, Redis, DynamoDB, Azure, LUIS, Pubnub, OneSignal, Cloudflare, Heroku
- RESTful API, Django, Django REST framework, Django-silk, Wagtail, Zappa, Swagger API