Kalamatic is a multi-language word game that has seen great success in the local market, boasting over 50k daily active users. I was responsible for implementing A/B testing of various features and strategies based on user behavior, leading to impressive results including a retention rate of 50% on day 1 and 20% on day 30, as well as an average playtime of 2200 seconds per session. It's a proud accomplishment that I include in my portfolio.