Building Native Trading Charts for Groww Android Introduction At Groww, one of the most heavily used surfaces in our trading experience is the candlestick chart. Users rely on it to make quick …

The Groww Engineering Blog offers insights, case studies, and technical articles on building scalable and reliable financial technology platforms. Covering topics such as backend architecture, microservices, and fintech innovations, the Groww Engineering Blog provides resources for software engineers and fintech professionals seeking to build robust and secure financial products and services.

Groww Engineering

Groww's engineering team built a custom native Android charting engine for real-time trading data visualization. The solution uses a single Canvas with multiple modular renderers to display candlestick charts, volume bars, and technical indicators like MA, EMA, and RSI. Key technical achievements include maintaining 60fps performance with thousands of data points through windowing, batched drawing with Path primitives, Matrix-driven transformations for gestures, and lazy computation for indicators. The architecture separates concerns into data, transformation, render, and interaction layers, enabling easy extensibility while avoiding overdraw issues.