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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.
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!
I always look forward to continuous learning and improving myself. Here's a snapshot of the tools and technologies I work with.
A collection of my recent backend tools, infrastructure templates, and full-stack experiments.
Insights on backend architecture, API design, and modern web development.
A collection of professional certifications and courses that have helped me deepen my knowledge and master new technologies.

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.

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.

FreeCodeCamp
Issued Aug 2024
Credential ID: fcc4b53621b-923e-4494-a85b-3667294ce6e7
Skills:
This program helped me learn REST API testing using Mocha and Chai.

Programming Hero
Issued Jun 2024
Skills:
This program helped me learn Tailwind CSS, JavaScript, React, REST APIs, and Firebase.
I'm a backend developer passionate about building clean, scalable systems. Here's a bit about my journey and what I bring to the table.