SYED TALHA HAIDER

Designed and implemented a multi-tenant architecture in an existing production product across the web app, backend, and mobile app, giving each tenant an isolated database while serving all tenants from a shared codebase. Built tenant-aware request handling and backend database connection resolution with matching tenant context on the React.js frontend and React Native mobile app. Owned day-to-day feature development, bug fixes, and maintenance across web, backend, and the BYOT customer mobile app. Developed reusable React components and applied SOLID/SRP principles in the backend to maintain and scale the codebase.

Developed Vizii, a microservices-based data visualization platform for accountants integrated with Xero and QuickBooks. Built services with React.js, Node.js, and MySQL, using RabbitMQ for inter-service communication. Used Elasticsearch for fast aggregation queries and MySQL for core relational data. Ran RabbitMQ and Redis on Docker-based infrastructure to support scalable and reliable service operation.

Joined as an intern and was promoted to Junior Full Stack Developer, taking independent feature ownership. Built an internal Performance Management System (React.js, Node.js, MongoDB) that combined employee metrics and client ratings to automatically select the “Employee of the Month”. Developed backend for a client's on-demand services mobile app using Node.js, Express.js, and MongoDB, including user authentication, REST APIs for the React Native app, and Firebase push notifications. Built reusable React components, fixed bugs, and followed a Git-based workflow with code reviews from senior developers.