Hi, I'm Arju Thapa 👋

Backend-Focused FullStack Stack Developer | Networking & Security Enthusiast | BEIT

I build APIs and systems first, UI second — and I'm happiest when I'm somewhere between a database schema and a packet capture.

• 🎓 BEIT, Everest Engineering College (Pokhara University)
• 💼 Full Stack Developer based in Lalitpur, Nepal — available for backend, full-stack, and API-focused roles
• 🔧 Most comfortable in the backend: API design, auth systems, databases, and the infrastructure underneath them
• 🌐 Equally drawn to networking and cybersecurity — I like understanding what's happening below the application layer, not just on top of it
• 🐧 Daily driver: Kali Linux

Backend & APIs — REST API design, authentication/authorization systems (JWT, OAuth2, RBAC), relational schema design, ORMs (TypeORM, Drizzle), and building services that hold up under real traffic patterns (race conditions, atomicity, multi-tenancy).

Networking & Systems — Raw socket programming, the OSI model, Linux internals, and command-line tooling — the layer most full-stack devs skip past.

Security-minded development — Stateless JWT auth, refresh token rotation, password hashing, and thinking about attack surface as part of system design, not as an afterthought.

Languages

Backend & Auth

Databases & ORMs

Frontend

Networking, Systems & Tools

• PostgreSQL Auth Service — Stateless JWT auth service built with Elysia (Bun) + Drizzle ORM. Covers schema design, RBAC, OAuth flows, refresh token handling, and Bun's native password hashing.
• doauth — Standalone Google OAuth2 app (Bun + Elysia) implementing the full redirect flow with JWT auth guards and protected routes.
• LAN Chat Application — Real-time local network chat built directly on Python raw sockets — no framework, just the protocol.
• Bash Backup Utility — Command-line backup tool for automating and managing local backups.

• KAHA Verse — Multi-tenant SaaS restaurant e-commerce platform (NestJS + TypeORM + PostgreSQL backend, React + TypeScript frontend). Built voucher/discount systems with atomic race-condition handling, configurable loyalty point accrual, and branch-scoped real-time features via Socket.io.
• Restaurant Order Management System — Full MERN stack order management system, built as primary developer.
• Kaha Hotel Management System — Multi-tenant hotel management system (NestJS, Next.js, PostgreSQL) using Row-Level Security for tenant isolation; contributed to testing and architecture review.
• Blog Management System — Dynamic full-stack blogging platform on the MERN stack.
• OAuth Authentication — End-to-end OAuth 2.0 authentication project implementing provider login flow, secure token exchange, route protection, and session/JWT handling.
• OAuth Authentication — End-to-end OAuth 2.0 authentication project implementing provider login flow, secure token exchange, route protection, and session/JWT handling.

• Blood View — Visualizing healthcare data for better insights
• LAN Chat App — Seamless local network chat with file sharing
• Face Detection System — Developing face recognition technology
• Blog Management System (MERN Stack) — Building dynamic, full-stack web applications

Besides coding, I’m excited about:

• Deepening my knowledge in networking and network programming
• Mastering Linux environments and command-line tools
• Preparing for CCNA certification to boost my network engineering career
• Exploring new technologies and frameworks with enthusiasm

• Blood View — Data visualization tool for healthcare data, built to surface insights more clearly.
• Face Detection System — Face recognition/detection system exploring applied computer vision.

• Deepening backend architecture: caching tiers, database replication & sharding, system design patterns
• Networking fundamentals toward CCNA certification
• Linux internals and infrastructure: Docker, VPS deployment, reverse proxying with Nginx
• Core CS foundations: OSI model, event loop internals, OOP/SOLID principles

📧 thapaarju11@gmail.com · 🔗 arjuthapa.com.np · 💼 LinkedIn