• Led a project to design and develop a new promotion where users will get cashback when they make their first transaction using a Binance card and save their card information for future transactions.• Implemented a new campaign allowing millions of EU users to buy discounted items using their Binance Card.

I worked on the Marketplace Intelligence team. I got laid off after 4 weeks of working here due to the difficult financial situation of Sea Group.

• Built a real-time interactive system to organize gaming sessions like Kahoot, and Confetti (Facebook), which can scale horizontally and handle 10k concurrent players on a server with 8GB RAM, 4vCPU• Built an IAM system that supports SSO, and central role/permission management based on Keycloak for internal admin tools which can easily integrate and save a lot of team development time.• Built a notification system that supports in-app and Firebase notifications and can scale horizontally using Spring Boot, Kafka, and Redis.• Set up CI/CD using Github actions, logging using ELK, and reverse proxy/load balancing using Nginx.• Lead a team of 2 developers and mentor 3 interns.

• Built a crawler that helps moderators easily identify invalid ad links by taking a picture of the link's destination and checking the number of redirects using Puppeteer.• Built a worker that maps millions of raw data a day on user feedback about LINE ads to output some meaningful metrics (in the ML field) using stream processing and batch update methodology.

• Built an SSO system based on OAuth flow and Zalo's social login API for internal admin tools.• Built an SSH permission management system, which manages SSH of hundred developers on 1200 servers.• Built a logging tool like Kibana's discover, which consume millions of log a day and have an easy-to-use UI using Servlet and Elasticsearch.• Built docs.zalopay.vn - an API specification and integration documentation using JAM stack.

• Learn Java stack and apply them to build a simple project management website.• Got a good feedback from my mentor and also a return offer.