Mubashir User

I’m a Full Stack Developer specializing in MERN and Next.js, with hands on experience independently building and deploying production SaaS products from the ground up. I enjoy taking products from an idea to a working system, including architecture, database design, authentication, APIs, third party integrations, AI features, billing, performance optimization, and deployment.

I’m currently building and running SaaS products including Khizar Overseas, a multi tenant white label CRM for overseas education consultancies, where I architected the platform, built a university data enrichment pipeline processing 8,900+ university records, developed programmatic SEO infrastructure generating 16,000+ indexed pages, and handled security and production infrastructure challenges.

I also built MarginFlow, an AI powered scope creep and change order platform for web design, development, and SEO agencies. I developed the complete system including Next.js, PostgreSQL, authentication, Gmail API and Pub/Sub based email ingestion, AI powered scope comparison using multiple LLM providers, subscription billing, background jobs, analytics, SEO, and automated outreach.

Previously, I built Enrichly, an AI powered lead enrichment platform with automated data processing, APIs, dashboards, and batch enrichment workflows. I have also built real time IoT systems using ESP32, MQTT, Node.js, React, and Socket.io.

My core technologies include JavaScript, TypeScript, React, Next.js, Node.js, Express, MongoDB, PostgreSQL, Redis, Prisma, REST APIs, Socket.io, OAuth, webhooks, BullMQ, Inngest, Cloudflare, Vercel, GitHub, Stripe, PayPal, Clerk, Gmail API, Playwright, and AI/LLM APIs.

I’m particularly interested in remote Full Stack and Software Engineering roles where I can take ownership, solve real product problems, work closely with a strong engineering team, and continue building scalable products used by real customers. I’m open to opportunities with teams in the US, Europe, and globally.