🚀 Full Stack Engineer | System Design & Architecture | Scalable Web Apps | Cloud-Native Solutions Hi, I’m Hari Mohan Prajapat — a passionate Full Stack Software Engineer with 6 years of experience architecting and delivering scalable, high-performance systems from frontend UIs to backend APIs and cloud infrastructure. 📞 **Direct Contact**: +91-6366653022 (WhatsApp or call) 🔗 [Join the World's Largest Software Engineers Group](https://www.linkedin.com/groups/10086569) 🧠 Focus Areas * System Design & Scalable Architecture * Data Structures & Algorithmic Thinking * Full Stack Product Engineering * Cloud-Native Deployments & CI/CD Automation * E2E & Unit Testing (Frontend + Backend) *Visualization & Debugging Jupyter notebook 🔧 Tech Stack & Tools Frontend React.js, Next.js, TypeScript, Redux Toolkit Storybook, Tailwind CSS Backend Python (FastAPI, Django, Flask) RESTful APIs, WebSockets, Authentication Testing ✅ React Testing Library + Jest for component and interaction testing ✅ Playwright for full E2E testing across browsers ✅ pytest + Playwright Python for backend and API automation ✅ TDD/BDD practices integrated with CI Cloud & DevOps AWS (EC2, Lambda, SQS, DynamoDB, EKS) Docker, GitHub Actions, Terraform Data ans Database & Logic PostgreSQL, MySQL, Pandas, NumPy Scalable Data Modeling, Async Patterns 📈 System Design Expertise * Re-architected monoliths into microservices * Implemented queues (SQS, Kafka) for real-time systems * Optimized latency with Redis, indexes, and async flows * Designed resilient APIs and auto-scalable infrastructure ### 🔬 Testing Focus **React E2E Testing** Component Testing: Jest + React Testing Library Browser Testing: Playwright for UI flows, accessibility, and responsive behavior Mocking APIs with MSW **Python E2E Testing** Backend Integration: pytest + database setup + test containers UI Automation with playwright-python for real-world workflows CI pipeline tests with headless browsers and parallel runners 🌐 Let’s connect if you're: Building reliable full-stack systems Focused on clean architecture & scalable infra Passionate about testing, automation, or system design