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jubayer17/README.md

Hi, I'm Jubayer Ahmed πŸ‘‹

Software Engineer specializing in scalable full-stack systems, production APIs, SaaS platforms, and AI-powered applications.

I work across React, Next.js, Node.js, NestJS, Django, PostgreSQL, Redis, Docker, AWS, and CI/CD, with a growing focus on LLM workflows, RAG, semantic search, and agentic systems.

325+ production APIs Β· Multi-tenant SaaS Β· AI / RAG Β· 800+ DSA problems

LinkedIn Portfolio Email


πŸš€ What I Build

  • ⚑ Scalable REST APIs, GraphQL services, and backend systems
  • 🏒 Multi-tenant SaaS, ERP, POS, HRM, and business platforms
  • πŸ€– AI applications with LLMs, RAG, embeddings, and semantic search
  • πŸ” Authentication, RBAC, authorization, and secure workflows
  • πŸ—„οΈ Data-intensive systems with PostgreSQL, Redis, Prisma, and TypeORM
  • πŸš€ Containerized deployments and CI/CD pipelines with Docker, AWS, and GitHub Actions
  • πŸ“ˆ Performance-focused systems using caching, queues, modular architecture, and clean coding practices

πŸ› οΈ Technical Stack

Languages

JavaScript (ES6+) TypeScript Python C C++

Frontend

React.js Next.js Astro Redux Toolkit Tailwind CSS

Backend & APIs

NestJS Django Django REST Framework REST APIs GraphQL WebSockets

AI & ML

LLMs RAG Context Engineering Embeddings LangChain LangGraph Semantic Search

Databases & Data

PostgreSQL MongoDB MySQL Redis Prisma TypeORM Firebase

DevOps & Cloud

Docker Kubernetes AWS (EC2, S3) GitHub Actions CI/CD Vercel

Tools

Git GitHub Postman VS Code npm yarn ESLint Prettier Webpack Inngest


πŸ’Ό Experience

GeekSSort β€” Software Engineer

Mar 2026 – Present Β· Mirpur, Dhaka

  • Developed and maintained 325+ production APIs across NestJS and Django/DRF using PostgreSQL, Redis, Prisma, TypeORM, Celery, and Docker.
  • Delivered a multi-tenant ERP platform with subdomain-based tenancy, RBAC, multi-branch operations, HRM, Inventory, POS, and Finance.
  • Developed SortPi, a multi-branch retail POS and store operations platform using Next.js, TypeScript, Django REST Framework, PostgreSQL, Redis, and Celery.
  • Built Compass German, a production e-learning platform supporting course management, enrollment, assessments, and content administration.
  • Built an enterprise barbershop management system with appointments, billing, inventory, attendance, and ZKTeco biometric integration.
  • Developed and restructured the GeekSSort company website using Astro, Sanity CMS, TypeScript, GSAP, Zustand, Zod, shadcn/ui, and Tailwind CSS.

GeekSSort β€” Junior Software Engineer

Oct 2025 – Feb 2026 Β· Mirpur, Dhaka

  • Developed backend services using NestJS, GraphQL, Prisma, PostgreSQL, and Redis for production applications.
  • Designed modular API structures and backend workflows with a focus on maintainability and scalability.
  • Implemented Redis caching and modular service patterns to improve backend performance.
  • Contributed to Shopify, Headless Shopify, and Framer projects in a client-facing development environment.

Vivasoft Ltd. β€” Software Engineer Trainee

Apr 2025 – Sep 2025 Β· Remote

  • Completed a 6-month trainee program contributing to a production-oriented e-learning platform.
  • Developed NestJS backend services and Next.js frontend features for course delivery and learning workflows.
  • Integrated REST APIs, authentication flows, and client-server communication using TypeScript.
  • Worked with PostgreSQL, Prisma, Git, and Postman through code reviews, debugging, API testing, and collaborative development.

⭐ Featured Projects

Multi-Branch Retail POS & Store Operations Platform

A retail platform focused on multi-branch operations, POS workflows, inventory, and store management.

Next.js TypeScript Django REST Framework PostgreSQL Redis Celery

Company Website β€” Restructure

A modern company website rebuilt with a performance-focused frontend architecture and CMS-driven content.

Astro Sanity CMS TypeScript GSAP shadcn/ui Zustand Zod Tailwind CSS

German Language Learning Platform

Production e-learning platform supporting course management, enrollment, assessments, and learning content administration.

Astro Next.js Django DRF PostgreSQL Redis Docker CI/CD

ERP Platform β€” HR, Inventory & Operations

Multi-tenant, multi-branch business platform covering HR, inventory, POS, finance, and operational workflows.

Next.js Redux Toolkit Django DRF PostgreSQL Docker CI/CD

Job Marketplace β€” Candidates & Employers Platform

Full-stack recruitment platform connecting candidates and employers.

Next.js NestJS TypeScript GraphQL PostgreSQL Prisma

Tapered

Clothing E-Commerce Platform

Shopify Liquid JavaScript HTML CSS

Edulecta

MERN E-Learning Platform β€” Auth & Progress Tracking

React Node.js Express.js MongoDB JWT REST APIs RBAC Redux Axios


🧩 Problem Solving

  • Codeforces: 600+ problems solved
  • LeetCode: 200+ problems solved
  • CSES: 40+ problems solved
  • Total: 800+ DSA & competitive programming problems

Codeforces LeetCode


πŸ† Achievements

  • ICPC Dhaka Regional 2025: Represented the team at the regional contest and solved 3 problems.
  • DUET IUPC 2025: Secured an honorable position and solved 4 problems.
  • Meta Hacker Cup 2025: Solved 2 challenging problems in Meta's global programming competition.
  • PSTU IT Carnival 2025: Achieved 3rd position, solving 4 challenging problems.

πŸŽ“ Education

Patuakhali Science and Technology University
Bachelor of Science in Computer Science Β· CGPA 3.35/4.00
Jan 2020 – Oct 2025


πŸ“œ Certifications & Training

  • JavaScript Algorithms and Data Structures β€” freeCodeCamp
  • Backend Development and APIs β€” freeCodeCamp
  • AWS Cloud Practitioner Essentials β€” AWS Skill Builder
  • Docker Essentials β€” IBM SkillsBuild
  • Git & GitHub Fundamentals β€” GitHub Learning Lab

πŸ“Š GitHub Activity

Jubayer's GitHub Stats Jubayer's Top Languages

🀝 Let's Connect

LinkedIn GitHub Portfolio Email

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    A web-based platform that helps users practice Codeforces problems efficiently through a structured ladder system. It allows users to track their progress, filter problems by rating, tags, and acce…

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  2. Tech-Nest Tech-Nest Public

    Tech Nest: A modern eCommerce web app built with Next.js, MongoDB, and related technologies for seamless shopping experience and efficient product management.

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    A clean and responsive personal portfolio website built using HTML, CSS, and Vanilla JavaScript. Highlights my projects, skills, achievements, and contact details β€” built from scratch with no frame…

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    Edulecta β€” a modern online learning platform that connects students and educators through interactive courses, live sessions, and personalized progress tracking. Built for seamless, engaging, and a…

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  6. library_management_system library_management_system Public

    This project is my very first project based on Frontend part where i used HTML,CSS,JS and Backend part where I used php and mySQL for database section.