Md Tauhidur Rahman

Led frontend and backend development for SingCapital, a multi-asset personal financial planning platform. Built a React.js advisor dashboard and a Vue.js 3 client portal enabling wealth advisors to manage insurance and investment portfolios across asset classes. Implemented real-time data sync using React Hooks, React Query, and Redux Toolkit, reducing manual refresh actions by 60%. Built a multitenant Node.js/NestJS backend with database-per-tenant isolation, ensuring SOC 2 Type II and GDPR compliance. Designed RESTful APIs with JWT, OAuth 2.0, and RBAC, with Redis caching, achieving 99.9% uptime under load. Improved database performance by 40% through query optimization, indexing, and PgBouncer. Established CI/CD with GitHub Actions and Docker, enabling zero-downtime blue-green deployments and cutting release cycle time by 50%.

Architected enterprise-grade multitenant SaaS platform using Node.js, NestJS, TypeScript, and Prisma ORM with per-tenant data isolation to ensure data security and regulatory compliance. Built high-performance RESTful APIs with PostgreSQL, implemented tenant isolation, row-level security (RLS), and horizontal data partitioning for scalable multi-client architecture. Implemented enterprise security with JWT authentication, OAuth 2.0, and RBAC to meet SOC 2 and GDPR standards. Optimized database performance by 40% via query tuning, indexing, connection pooling (PgBouncer), and Redis caching to support 10,000+ concurrent requests with 99.9% uptime. Delivered a responsive frontend integration using Vue.js 3, Vuex/Pinia, and Axios with real-time data synchronization.

Architected enterprise-scale web applications using React.js 18, Node.js, Express.js, TypeScript, and PostgreSQL within a microservices framework delivering 99.9% uptime for mission-critical systems. Optimized frontend performance by 40% through code splitting, lazy loading, useMemo, useCallback, and bundle optimization. Built robust backend APIs with Node.js, Express.js, NestJS, and PostgreSQL, applying clean architecture, SOLID principles, and complex business logic. Led a React.js frontend team of 4+ engineers, mentored juniors, and oversaw sprint planning, code reviews, and Agile/Scrum practices. Developed native and cross-platform mobile apps (Android, iOS, Kiosk) in Kotlin, Swift, React Native, and Flutter with CI/CD via Fastlane. Integrated IoT device communication for Android-based kiosks using Kotlin/Java (UART, I2C, SPI, MQTT) and real-time sensor data processing.