Hamza K.

⭐ Expert-Vetted Full-Stack Developer (Python + Node.js) & AI Engineer 🏆 Lead Developer @ LetzChat — 300M+ Events/Month, Real-Time AI Infrastructure 💼 28+ Production Projects Across Enterprise, SaaS & AI Platforms I build enterprise-grade systems that operate at real production scale — not demos. My work spans translation platforms processing 300M+ monthly events, AI SaaS platforms managing 2,800+ users and 33,000+ API calls, and AI automation systems deployed across global businesses. FULL-STACK DEVELOPMENT (Python + Node.js) Backend: Python (FastAPI, Django), Node.js (Express.js, NestJS) Frontend: React.js, Next.js, TypeScript, Tailwind CSS Databases: PostgreSQL, MongoDB, ClickHouse, Redis, DynamoDB Cloud: AWS (EC2, Lambda, S3, CloudFront), GCP, Docker, Kubernetes, Terraform, CI/CD APIs: REST, GraphQL, WebSockets, Apache Kafka, RabbitMQ AI ENGINEERING & AUTOMATION I build AI systems that run in production, not just in notebooks: - Real-time voice/video dubbing with neural voice cloning across 40+ languages - Zoom live captions, Twilio live call translation, podcast & document translation - Custom GPT agents, RAG pipelines, AI chatbots reasoning over PDFs & documents - Analytics dashboards with "Ask AI" powered by Kafka + ClickHouse at 300M+ events/month - Voice AI: OpenAI Whisper, Google STT/TTS, emotional tone preservation - Custom Python monitoring tools published on PyPI, Prometheus + Grafana stacks PLATFORMS DELIVERED LetzChat (Sep 2022 – Present) — Lead Developer Enterprise multilingual platform: real-time analytics, Shopify translation app, Square POS integration, document translation, glossary management, Zoom/Twilio integration, world map visualization, API & server monitoring. AI Gender Recognition SaaS (Sep 2024 – Mar 2025) — Lead AI Engineer Multi-modal AI (image, video, text, voice), GDPR/CCPA compliant, Stripe billing, 2,800+ users, 33,000+ API calls, 97.2% API key adoption rate. Shopify Embedded App — OAuth, Theme App Extensions, App Store submission. Real-Time Communication — WebRTC, WebSocket translation layers for 10,000+ attendee conferences. WHY CLIENTS HIRE ME ✔ Led systems processing 300M+ real-world events per month ✔ AI systems built for production — reliable, deterministic, observable ✔ Neural voice cloning & dubbing across 40+ languages ✔ Full ownership: architecture, DevOps, CI/CD, monitoring, and shipping ✔ Published to PyPI, submitted to Shopify App Store ✔ Product thinking alongside engineering depth I don't just write code. I design systems, solve real problems, and ship products that create measurable impact. AI Translation Tool, Translation Software Development, Document Translation Software, Translation API Integration, OpenAI Translation API, DeepL API Integration, Google Translate API, PDF Translation Tool, DOCX Translation, OCR Translation, Multilingual Website Development, Website Localization, App Localization, i18n, RTL Support, Bulk Translation Automation, Translation SaaS, Chrome Extension Developer If you need an engineer for AI automation, multilingual systems, real-time infrastructure, or complete SaaS platforms — send me a message.