Scaling Mobile Engagement

CashBoss rewarded users with cashback only after they installed a partner app AND used it for the advertiser's required duration (30 seconds to 5 minutes depending on the client). There was no SDK embedded in the partner apps — tracking had to be done externally, via Android broadcast signals and polling, without false positives that would cost the business real money.

Built a server-side attribution pipeline that combined Play Store referral tracking (Google Install Referrer API) with an Android client-side job scheduler that polled app foreground state at configurable intervals. The server stored the install event with a timestamp and the client-reported active-use duration, validating against the per-advertiser time-window threshold before marking a conversion as eligible for cashback.

The existing backend was not designed for high-concurrency mobile traffic patterns — bursts of API calls from thousands of concurrent users performing offer discovery, install callbacks, and cashback status polls simultaneously.

Built a modular Yii2 RESTful API layer with optimised response schemas for the Android client, connection pooling, and per-endpoint caching to flatten traffic spike impact.

The marketing and operations team needed real-time visibility into campaign performance, user engagement, and cashback disbursement — and a direct channel to re-engage users who had gone dormant.

Built a comprehensive admin panel covering campaign management, user analytics, cashback approval workflows, and deep-link generation. Integrated push notification delivery with segmentation by user activity and install status. Implemented deep linking so push notifications and marketing URLs landed users directly on the relevant offer inside the app.