Sadman Rizwan Email & Phone Number

Dhaka, Bangladesh

Dhaka, Bangladesh

- Worked as a team lead in development of a digital signature platform, that used Angular in the frontend, .NET in the backend, MongoDB as the database and a microservice architecture for its dependencies.- Led the development team to implement the revamped version of the platform, enhancing its functionalities and performance, contributing to the acquisition of major clients.- Worked on integrating identity verification services into the platform, allowing it to sign documents with compliance of Bangladeshi, Swiss and European legal standards.- Integrated Ethereum blockchain smart contract signing flow into the platform, expanding the platform’s technological boundary.- Worked on a crypto trading platform that used Next in the frontend and Node in the backend.- Integrated big number library in the Node application for handling precisions in blockchain transactions, reducing errors in high-value transfers across the platform by 99%.- Integrated UI language management services in the Next JS application, allowing languages to be updated and managed live, reducing deployment time and improving flexibility.- Worked as a team lead in development of an NFT marketplace that used React in the frontend.- Led the development team to implement the frontend of the marketplace from scratch.- Integrated blockchains wallets (MetaMask, Coinbase) into the React application.

- Worked as the solo developer of a certificate management platform, using React in the frontend, Django in the backend and PostgreSQL as the database.- Integrated third part API in the backend for fetching user information and storing in the system with auto deletion mechanism for GDPR compliance.- Implemented tool for generating PDF document from SVG template.- Implemented a mail service that allowed sending of documents through emails in bulk.