# Tanzim Hossain

**Backend Engineer** — System Design & Scalable Backend Systems

tanzimhossain2@gmail.com  
+88 01838647383  
Dhaka, Bangladesh  
https://github.com/0xtanzim  
https://linkedin.com/in/0xtanzim

---

## Summary

I'm a CS undergrad at United International University who enjoys the unglamorous parts of backend engineering — clean boundaries, predictable data flows, and code my future self can still understand. I spend most of my time on multi-tenant SaaS design, concurrency, and small but pragmatic framework experiments. Outside of that, I mentor students at Softsasi and write about what I'm learning.

## Experience

### Backend Engineer & Mentor — Softsasi
_Dec 2025 — Present · Full-time · Remote_

- Designed and developed scalable backend systems
- Implemented clean architecture and modular service layers
- Led code reviews and architectural decisions
- Mentored interns on production-level engineering practices

### Mentor — Softsasi
_Jun 2025 — Dec 2025 · Part-time · Remote_

- Mentored developers on backend architecture and frontend structure
- Guided real-world project development
- Improved debugging and system-thinking skills of students

## Selected Projects

### Salon Management SaaS — Multi-tenant SaaS Platform
_2025 · In Progress_

Backend for salon operations — booking, scheduling, and subscriptions on a multi-tenant foundation.

**Tech:** Node.js, TypeScript, PostgreSQL, Redis, AWS

### FileTree Pro — VS Code Extension
_2024 · Active_

VS Code extension to generate and preview project folder trees before files hit disk — small surface area, steady adoption.

**Tech:** TypeScript, VS Code API, Webview UI
**Impact:** 29,000+ downloads

### NextRush — Backend Framework
_2025 · In Progress_

A learning-driven Node.js framework with a middleware pipeline, routing layer, and plugin system.

**Tech:** Node.js, TypeScript

## Technical Skills

- **Languages:** TypeScript, Java, Go, Python, C++
- **Backend:** Node.js, Express, NestJS, Spring Boot
- **Frontend:** React, Next.js
- **Database:** PostgreSQL, MongoDB, Redis
- **Infrastructure:** AWS EC2, AWS RDS, AWS S3, Load Balancer, Docker
- **Architecture:** Multi-tenant Architecture, Clean Architecture, Service-Repository Pattern, RBAC, OOP, Framework Design
- **System Design:** Rate Limiting, Caching Strategy, Background Jobs / Queues, Event-driven Patterns, Concurrency Control
- **AI:** LLMs, LangChain, Agent Systems

## Achievements

### NASA Space Apps Challenge 2025
_2025 · 1st Runner Up_

Finished 1st Runner Up at the global NASA Space Apps Challenge, building a working solution with a team under a 48-hour constraint.

## Education

- **BSc in Computer Science** — United International University (UIU) _(Ongoing)_

## Writing

Articles on backend systems, architecture, and developer experience — [@0xtanzim on Medium](https://medium.com/@0xtanzim).

---

_Last updated April 2026. References available on request._