• Led the redevelopment of the blockchain smart contract event indexer using Python, Redis, and

Celery, improving end-to-end transaction success rate from 40% to 95%.

• Developed and deployed Ethereum smart contracts for Global Bid using Solidity, with integrated

payment methods via Stripe and Alchemy APIs, generating $100K+ revenue in the first quarter.

• Designed and built the Private Sale and Mint on Demand products using Django and GraphQL,

delivering $64K revenue in the first quarter.

• Engineered robust contract and token importing systems supporting ERC-721 and ERC-7160.

• Collaborated with ML engineers to develop enhanced search functionality using gRPC services and

OpenSearch.

• Implemented data-driven development practices through Statsig A/B testing framework integration

serving 100+ experiments.

• In Ads Team - SMB (Small and Medium-size Business) / Guidance

• Built the advertisers recommendation systems and Salesforce - Integration with XFN teams

• Implemented Lil's Ads Manager on React Native

• Promoted to Senior Software Engineer

• In Growth Team - User State Machine/Unauth/SEO

• Implemented various types of web landing pages and SEO.

• Designed, implemented and data analyzed A/B testing experiments across Desktop/mobile web/PWA/AMP.

• https://www.poshprofiles.com/ (used name Yapjoy) is a online platform for connecting the wedding professionals and brides/grooms with over 1000 bride/grooms and over 6500 wedding professionals.

• Designed and developed the subsystems including bidding, subscription/payment system, user-guidance questionnaire, image drag/drop uploading, Yelp API integration, Facebook/Google/Instagram login and recommendation systems in full-stack for the website and iOS App

oh!ya (Deprecated/Closed at 2018), iOS Apps and website https://www.ohya.global/, is a marketplace for anyone to share or sell his/her homemade food to the nearby.Two Apps each serves for the cook side and the customer side respectively.

Demo-workflow: https://www.youtube.com/watch?v=EKyG7Qy5_PE

Foodie iOS App: https://itunes.apple.com/us/app/oh!ya-guest/id1141022971 (deprecated)

Cook iOS App: https://itunes.apple.com/us/app/oh!ya-partner/id1141021340 (deprecated)

Led a five-engineers team and published 2 Apps from scratch within 5 months.

Designed and developed the use cases, data model, product structure and backend servier.

Led the development of iOS Apps.

Retrospective and Reviews:

https://chongyaorobin.wordpress.com/2017/08/23/review-of-ohya-inc-part-1-positioning/

https://chongyaorobin.wordpress.com/2017/08/24/review-of-ohya-inc-part-2-product-design/

https://chongyaorobin.wordpress.com/2017/08/27/review-of-ohya-inc-part-3-ios/

https://chongyaorobin.wordpress.com/2017/08/28/replay-review-of-ohya-inc-part-4/

https://chongyaorobin.wordpress.com/2017/08/25/review-of-ohya-inc-part-v-summary/