Perpetual Protocol, Senior Software Engineer, May 2021 ~ Aug 2023

• Backend service development
• Blockchain data processing
• Rewarding system
• Trading bots
• RESTful API, GraphQL API
• Typescript, Node.js, Mocha, Ethers.js
•  Infrastructure DevOps
• AWS, Kubernetes, EKS, Lambda, DynamoDB, AppSync, S3, Route53, CloudFront
• Serverless Framework, Github CI/CD

DISHRANK, Senior Backend Developer, Sep 2020 ~ May 2021

• RESTful API development
• Golang, GraphQL
• Infrastructure DevOps
  
• Gitlab, Jenkins, MySQL, Terraform, Kubernetes, AWS, EKS, RDS

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

• 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) 

• 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

Pichat, Backend Developer, Feb 2014 ~ May 2015

• RESTful API development with Django, Django REST Framework and AWS

Acer, R&D Manager, Jan 2008 ~ Feb 2014

R&D Manager, Dec 2012 ~ Feb 2014 

• Leading a task force with 5 members for product planning and prototyping

• WinRT app development and management on tablet - Acer Scrapboard and MemoryBinder

• C++/CX, design thinking, cross-functional communication

• Co-working with Intel US team to optimize graphic performance of Acer Ring app on Windows tablet. The performance is 10% faster than iPad. 

• C++, Direct2D, cross-functional communication

• Technology transfer and co-development with Intel US team Touch app development on Windows dual screen laptop - Touch keyboard and Acer Ring 

• C#, .NET Framework, WPF

• App development on Windows all-in-one machine - Acer Touch Gadgets

• C#, .NET Framework, WPF