Hussnain

Full Stack Developer at Bizyness.fr

Developers World LLC • Full time

Jan 2023 - Jun 2025 • 2 yrs 5 mos

Senior Full Stack Developer at Bizyness, a French SaaS & e-commerce platform - delivering production-grade web, mobile, and open-source tooling used by real businesses at scale. Tech Stack: ReactJS · React Native Expo · Node.js · Express.js · Fastify.js · TypeScript · MongoDB · Redux · ViteJS Key Contributions: ✦ Architected and shipped SaaS platforms, e-commerce apps, mobile apps, and Shopify extensions from concept to production ✦ Designed and published custom NPM packages in both React/TypeScript (frontend) and Node.js (backend) including reusable UI component libraries, utility modules, and API clients used across internal and external projects (a skill held by fewer than 5% of full stack developers) ✦ Built serverless REST APIs with Node.js, Express.js & Fastify optimized for high-traffic performance ✦ Integrated Stripe, PayPal, Amazon, Shopify, Zapier, WiziShop & Intercom into production applications ✦ Implemented multi-language localization systems for international user bases ✦ Maintained code quality through ESLint standards and Cypress unit & E2E testing ✦ Translated complex business requirements directly into clean, scalable, production-ready code across frontend and backend

Senior MERN Stack Developer | Technical Lead at DeBoear Media NYC

Google • Full time

Sep 2020 - Dec 2022 • 2 yrs 3 mos

Senior MERN Stack Developer & Technical Lead at DeBoear Media — leading end-to-end full stack development for SaaS, business, and enterprise applications while managing teams and driving projects from requirement to production. Tech Stack: React.js, Node.js, Express.js, MongoDB, MSSQL, REST APIs, Redux, Agile Scrum Key Contributions: ✦ Led full stack development of SaaS platforms, stripe enabled systems, dashboards, Slack Integration, Third party API Integration and API-driven enterprise applications ✦ Architected and managed both MongoDB (NoSQL) and Microsoft SQL Server (MSSQL) databases — writing optimized stored procedures, transactions, and complex queries for high-performance data operations ✦ Designed and built secure, scalable REST APIs for frontend and third-party consumption ✦ Integrated payment gateways and third-party APIs including Slack API workflow automation into production systems ✦ Served as Technical Lead conducting code reviews, mentoring junior developers, and coordinating cross-functional team collaboration ✦ Managed full Agile Scrum lifecycle: sprint planning, daily stand-ups, backlog grooming, and stakeholder communication ✦ Translated complex business and enterprise requirements into clean, maintainable, production-ready code across the full stack