Usama Zeeshan

Role: Full Stack Engineer Stack: Next.js, Supabase, TypeScript, Tailwind, Radix UI Overview: QTAP is a multi-tenant SaaS platform that enables businesses to manage customer loyalty programs using NFC tags, QR codes, and digital cards. Key Contributions: • Designed multi-tenant architecture with RBAC + Row-Level Security (RLS) • Built points, stamps, and redemption tracking system • Developed campaign management + push notifications system • Implemented analytics dashboards with reporting insights • Built trial system + tier-based subscription billing • Enabled AI-powered features using Vercel AI SDK • Supported multi-location staff & organization management Role: Full Stack Developer Stack: React, MapLibre GL, DRF, PostgreSQL, PostGIS • Developed interactive geospatial dashboards (heatmaps, clusters, overlays) • Built 4-level approval workflow with audit tracking • Engineered high-performance spatial APIs for large datasets • Implemented RBAC security + data lineage tracking Role: Full Stack Developer Stack: FastAPI, PostgreSQL, Electron, React, Stripe • Architected complete marketplace system (auth, payments, roles) • Built cross-platform desktop app (Electron) • Integrated Stripe (subscriptions, checkout, KYC) • Implemented PII detection + secure data scanning engine Role: Backend Engineer Stack: Node.js, WebSockets, Twilio, OpenAI, Retell AI • Built real-time AI voice pipelines using WebSockets • Integrated multi-LLM orchestration + function calling • Developed call lifecycle automation + real-time transcripts Role: Frontend & Integrations Stack: Next.js, React, Node.js • Built modular dashboards for automation workflows • Integrated ServiceNow, POS, ThousandEyes APIs • Developed secure routing + reusable UI components Role: Full Stack Developer Stack: SvelteKit, FastAPI, PostgreSQL, LangChain • Built RAG-based AI chat system with vector search • Implemented real-time chat + WebSocket architecture • Developed usage billing + admin dashboards Role: Full Stack Developer Stack: React, NestJS, PostgreSQL, Firebase • Built member + trainer management system • Implemented QR-based equipment tracking • Developed real-time chat + push notifications Role: Full Stack Developer Stack: NestJS, PostgreSQL, Redis, React • Built secure encrypted vault system (OpenPGP) • Designed multi-tenant access + RBAC workflows • Developed offline-first PWA Stack: MEAN, Stripe, Twilio • Integrated Moodle, Stripe, Twilio & third-party services • Designed PostgreSQL schema + AWS deployment (EC2, S3, RDS) Stack: MERN, HighCharts • Built analytics dashboards + NFT integrations • Led task management + deployments (Docker, Jenkins, AWS) ADNOC Data Visualization System Mountain Top Analytics App Safety Monitoring App Fynite (Password Management SaaS) LLM Integration Platform