Hello, I'm
MazaharulIslam
Full Stack Software Engineer
I build scalable web systems with strong fundamentals in data structures, APIs, databases and modern frontend architecture. My focus is turning complex requirements into clean, reliable products.
Algorithmic thinking, clean architecture, measurable efficiency.
I work across the stack — from polished interfaces and API design to authentication, databases, deployment and the engineering decisions behind the product.
- O(N)
- Efficient solutions
- Linear time whenever the constraints allow it.
- O(1)
- Memory efficient
- Intentional allocations and simple data flow.
- O(log N)
- Fast search
- Binary search, indexing and efficient lookup patterns.
- DSA
- Problem solving
- DSA patterns to reason about performance before optimizing.
215+
solved on LeetCode · @bymaza
99
Easy
105
Medium
11
Hard
Arrays, trees, graphs, binary search, sliding window and dynamic programming — in preparation for software engineering interviews.
Frontend
- JavaScript
- TypeScript
- React
- Next.js
- Tailwind CSS
Backend & data
- Node.js
- Express
- NestJS
- PostgreSQL
- MongoDB
- Prisma
- REST APIs
- JWT Auth
Architecture & tools
- Docker
- Git / GitHub
- Linux CLI
- CI/CD
- System Design
Systems I've designed, built and shipped to production.
- ↗
01 · Fashion commerce
Streetwears shop
Streetwears storefront focused on product discovery, clear catalog presentation and a clean, conversion-ready shopping experience.
Next.js · TypeScript · Tailwind CSS · E-commerce
- ↗
02 · Travel commerce
Fly Bismillah
Flight booking platform that searches live Duffel inventory, normalizes routes, filters results and prepares pricing for checkout.
Next.js · PostgreSQL · Prisma · Duffel API
- ↗
03 · AI fintech · featured
FinVault
AI-powered fintech dashboard where users track spending, view transaction history and manage secure money-transfer workflows.
Next.js · PostgreSQL · Prisma · Claude AI · Docker
- ↗
04 · Search platform
VoterFinder
Fast voter serial lookup that uses indexed MongoDB queries to find records quickly through a simple responsive search flow.
Next.js · MongoDB · REST APIs · Tailwind CSS
From frontend foundations to full-stack systems and interview-focused engineering depth.
2023
Frontend foundations
Built production-minded interfaces while strengthening JavaScript, React, reusable components and responsive UI thinking.
JavaScript · React · Tailwind · Git
2024
Moved into full-stack engineering
Expanded into APIs, authentication, backend architecture and database modeling with MongoDB and PostgreSQL.
Node.js · Express · MongoDB · PostgreSQL
2025
Performance-driven delivery
Shifted toward scalable product delivery with Next.js, TypeScript, Prisma, Docker and stronger architecture discipline.
Next.js · TypeScript · Prisma · Docker
2026
DSA + Java + system design
Deepening algorithmic problem solving, Java fundamentals and system design thinking for software engineering interviews.
Java · DSA · System Design · Linux
BBA in Accounting
Jashore Government City College, Jashore, Bangladesh
Formal business and accounting foundation alongside a self-taught software engineering journey.
Let's work together.
Open to collaboration, hiring and serious technical conversations.
devmazaharul@gmail.com↗