The setting
Sharekhan's trading app has 200K+ daily active users. The mobile team ships a release every two months. Market data and order APIs send JSON and byte-level payloads, and the app parses both in real time.
What I owned
I architected and built the one-click F&O module. A trader picks an instrument and places the order with one tap.
In the same period I moved the legacy code to Riverpod and SOLID principles, which made new modules easier to build. I also designed the CI/CD pipeline and release process that several teams use today.
The result
The module now handles 10% of the app's total trade volume.
Trading screens leave no room for a slow path. I design the fastest path first and write the unit and integration tests with the feature.
I built this inside Sharekhan's production app, so I can't share screens, data or architecture here. I'm happy to talk through the engineering decisions.