Ramzan Z.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

Senior Software Architect with 15 years of experience delivering enterprise-grade platforms across fintech, healthcare, food delivery, defense, EdTech, and media streaming industries. Over my career I have successfully designed and delivered complex systems across multiple high-stakes domains: Fintech: Card lifecycle management, 3D Secure payment flows, Mastercard and Visa network integrations, real-time transaction processing handling millions of daily operations, and SSO/SAML authentication systems. Healthcare: Patient data platforms, appointment and scheduling systems, secure health record management, and third-party interoperability integrations. Food Delivery and Logistics: High-concurrency order management systems, real-time driver tracking, dynamic pricing engines, and multi-vendor marketplace backends. Defense and C4ISTAR: Mission-critical command and control platforms, unmanned vehicle control systems, secure telemetry pipelines, and compliance-driven secure architectures for government and defense clients. LMS and EdTech: Learning management systems with course delivery, progress tracking, assessments, role-based access control, and third-party content integrations. Media and Video Streaming: Live and on-demand streaming platforms using WebRTC, HLS, and GStreamer. Real-time video pipelines, adaptive bitrate delivery, and desktop streaming clients. E-Commerce and Marketplaces: Scalable product catalogs, inventory management, payment gateway integrations, and order fulfillment workflows. Core technical strengths: Java and Spring Boot microservices at scale with 20 plus service ecosystems Event-driven architecture with Apache Kafka and Kafka Streams Infrastructure using Docker, MongoDB, Redis, Elasticsearch and MinIO DevSecOps with GitLab CI/CD, OWASP compliance and security hardening Frontend development with React and Electron for desktop-grade applications API design covering REST, gRPC, WebSocket and reactive Spring WebFlux I deliver clean, documented, production-ready systems and communicate clearly with both technical teams and business stakeholders. Available for architecture consulting, system design, senior development, and code review engagements.