Kamrul Hasan Tutul

Served as the sole front-end developer and architect for Traadium Pro, a multi-module crypto-fintech trading platform covering spot trading, leveraged futures, payments, and KYC. Diagnosed and redesigned a critical performance bottleneck causing near-100% CPU usage on live trading pages by re-architecting the real-time order-book and market-data pipeline around a dedicated Web Worker, batched state updates, and directed DOM rendering; verified 60%+ improvement via controlled before/after benchmarking. Built a custom Canvas 2D depth-chart rendering engine (gradient fills, coordinate scaling, zoom/pan, and real-time redraw batching) to replace a third-party library in high-traffic chart views. Integrated multiple distinct payment gateways and a third-party KYC provider, respecting each provider’s sync/async and webhook/polling requirements. Recruited, trained, and directed junior developers, reviewing and merging their contributions into production code. Worked directly with internatio

Developed large-scale crypto-financial web application features using React.js, TypeScript, and GraphQL, including early real-time trading and market-data UIs. Built and integrated initial Stripe and Braintree payment flows supporting secure fiat deposits and withdrawal transactions. Implemented real-time features using React Query and GraphQL subscriptions and contributed to front-end codebase performance improvements. Collaborated with senior engineers and team leads on business requirements, technical design, and delivery of core product functionality.