About Me
Hi, I'm Shahadath Hossen Sajib — a backend developer passionate about building clean, scalable, and maintainable systems. I currently work at a service-based company where I develop APIs and backend features using NestJS, Drizzle ORM, Prisma, and PostgreSQL. Starting my journey with the MERN stack, I gradually found my interest in the backend ecosystem — working with databases, designing APIs, and focusing on performance and clean architecture. Outside of work, I’m actively learning advanced NestJS patterns, PostgreSQL internals, and data structures & algorithms to sharpen my problem-solving and system design skills. I also love working on side projects that challenge me and help me grow as a developer. I’m always eager to explore new technologies, improve my craft, and collaborate on meaningful products.
My Tech Journey
Over the past 1.5 years, I've grown through hands-on experience and real-world projects. Here's a look at some key milestones that shaped my path so far. Always open to exciting opportunities—let's connect!
Back End Developer
- Building and maintaining scalable RESTful APIs using NestJS and TypeScript.
- Working with Drizzle ORM and Prisma for efficient, type-safe database access.
- Designing and managing relational schemas in PostgreSQL.
- Collaborating with the frontend team to deliver production-ready features.
- Implementing best practices for code quality, testing, and documentation.
Web Developer
- Contributed to both frontend and backend development in a large-scale MERN stack project.
- Built reusable components and REST APIs using React.js, Remix, Express.js, Node.js, and MongoDB.
- Managed and configured a large-scale Nx monorepo to optimize modularity and scalability.
- Led a frontend team, facilitating collaboration and improving productivity.
Quality Assurance Intern
- Wrote comprehensive unit tests for frontend and backend using Jest, Vitest, MSW, and Supertest.
- Explored and experimented with K6 for backend load testing and performance profiling.
- Contributed to improving overall code quality and reliability in a full-stack testing environment.
Know about my skills
I always look forward to continuous learning and improving myself.
Certifications
Next Level Web development
Programming Hero
Issued May 2025
Credential ID: PHL2B4MERNWEB9-10321213
Skills:
In this program, I learned a comprehensive range of technologies, including TypeScript, Node.js, Express, React, Next.js, MongoDB, and Mongoose.
React Testing Library with Jest / Vitest
Udemy
Issued Sep 2024
Credential ID: UC-0ef939de-66dd-421c-993d-b2f7cddae802
Skills:
This course helped me learn best practices for testing applications using Vitest and React Testing Library in a test-driven development (TDD) approach.
Quality Assurance
FreeCodeCamp
Issued Aug 2024
Credential ID: fcc4b53621b-923e-4494-a85b-3667294ce6e7
Skills:
This program helped me learn REST API testing using Mocha and Chai.
Complete Web Development Course
Programming Hero
Issued Jun 2024
Skills:
This program helped me learn Tailwind CSS, JavaScript, React, REST APIs, and Firebase.
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Featured Projects
Check out some of my recent work
Featured Blogs
Explore latest blog posts and insights
Explore the monorepo approach: what it is, how it compares to multi‑repo and hybrid setups, and why teams of all sizes can benefit from a single, unified repository.
Dive deep into JavaScript’s variable declarations—var, let, and const. Learn about scope, hoisting, temporal dead zones, redeclaration rules, and best practices to write cleaner, more reliable code.