Available for opportunities

Sajjad
Hossain

I architect scalable infrastructure and web applications. Bridging the gap between robust development and DevOps, I build secure, high-performance solutions using .NET and the modern JavaScript ecosystem.

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Sajjad Hossain
2+
Years Exp.
5+
Microservices

About

About Sajjad
Dhaka, Bangladesh

I am a Full-Stack Engineer dedicated to building software that marries robust, scalable infrastructure with state-of-the-art user interfaces. Specializing in the TypeScript ecosystem, I engineer high-performance frontend experiences with React & Next.js, supported by resilient, cloud-ready microservices built on NestJS. My focus is on delivering maintainable codebases that drive exceptional business value.

Role

Software Engineer

Turning ideas into full-stack products, one commit at a time

Education

B.Sc. Computer Science

AIUB · Graduated 2023

Achievement

AI HackFest Champion

Team QuantoBug · 2023

Languages

Bengali (Native)

English (Professional)

Download Resume

Technical Skills

Frontend

AngularReactNext.js (SSR/SSG)TypeScriptJavaScript ES6+Tailwind CSSResponsive Design

Backend

Node.jsNestJSExpress.jsMicroservicesREST APIsRBAC Systems

Databases & Cloud

PostgreSQLMongoDBMySQLAWS S3Azure

DevOps & Tools

DockerKubernetesPortainerKeycloakGit & CI/CDOpenAI APIsRedis

Experience

Jr. Software Developer

Vonome Software & Systems·On-site
Full-timeApril 2026 – Present
  • Building and maintaining on-site enterprise features with Angular and NestJS
  • Designing and scaling microservices architecture for SaaS-oriented products
  • Managing authentication and access control workflows with Keycloak
  • Streamlining DevOps operations and deployments using Portainer and containerized infrastructure
  • Contributing to R&D and .NET-based system development while improving scalable cloud architecture understanding

Junior Software Engineer

Munchies·Dhaka, Bangladesh
Full-timeMarch 2024 – March 2026
  • Architected NestJS microservices (5+ services) for scalable food delivery platform
  • Built Next.js SSR system significantly improving SEO and page performance
  • Developed RBAC multi-vendor admin system with role-based dashboards
  • Built order lifecycle management system handling concurrent real-time orders
  • Optimized API latency with Redis caching & PostgreSQL query tuning
  • Managed media assets and CDN delivery via AWS S3
  • Led code reviews and drove cross-team technical collaboration

Intern Software Engineer

SJ Innovation LLC·Dhaka, Bangladesh
InternshipJuly 2023 – November 2023
  • Built AI customer support chatbot using MERN stack + OpenAI API integration
  • Automated support query handling reducing manual response time
  • Designed backend services for AI request handling and multi-turn conversations
  • Implemented secure file storage and retrieval via AWS S3

Projects & Products

Munchies V3
LIVE

Munchies V3

Multi-Vendor Food Delivery Platform

  • Real-time order lifecycle tracking
  • Role-based dashboards (vendors / admins)
  • Microservice backend for concurrent orders
  • Production SSR deployment
NestJSNext.jsPostgreSQLAWS S3Docker
View Live
Cookspace
LIVE

Cookspace

Recipe Community Platform

  • Mobile-first responsive design
  • User-generated recipe content
  • Reusable component system
  • Community interaction features
ReactNode.jsExpressMongoDB
View Live
Vector
LIVE

Vector

Real-Time Logistics Autopilot

  • Real-time flight delay & traffic recovery suggestions
  • Voice interaction via Web Audio API & AudioWorklet
  • Live dashboard visualising AI reasoning and routes
  • Built for Gemini Agent Challenge 2026
Next.js 16TypeScriptTailwind CSSZustandReact QueryMapboxWebSocketsWeb Audio API
View Live
Nexus AI
LIVE

Nexus AI

Futuristic Multi-Model AI Learning Platform

  • Multi-model AI chat (OpenAI, Claude, Gemini)
  • IELTS & GRE adaptive exam practice
  • Live coding IDE with AI tutor
  • iOS 26 Liquid Glass UI & voice I/O
ReactOpenAI APIClaude APIGemini APIAIMulti-ModelIELTS PrepGRE PrepCoding Tutor
View Live
Jo
LIVE

Job Board Application

Full-Stack Job Listing & Application Platform

  • Browse, search, and filter jobs by category & location
  • Detailed job pages with application forms
  • Admin dashboard for managing job listings
  • Fully responsive across mobile, tablet, and desktop
React 18React Router v6Tailwind CSSViteReact Hooks
View Live
Xai – Intelligence Workspace
LIVE

Xai – Intelligence Workspace

Interactive AI Data Visualization Experience

  • Visualizes raw data → actionable intelligence pipeline
  • Scroll-based animations and immersive interactions
  • 3D data visualizations with React Three Fiber
  • High-performance rendering with GSAP motion design
Next.jsTypeScriptThree.jsReact Three FiberFramer MotionGSAPTailwind CSS
View Live
Li
LIVE

Live Sports Platform

Real-Time Match Data & Scores Platform

  • Real-time match scores and sports updates
  • API-driven architecture for structured sports content
  • Responsive UI with clean Bootstrap layout
  • NestJS-inspired backend for organized data management
Next.jsNode.jsBootstrapREST API
View Live

VS Code Extensions I Built

I build experimental VS Code extensions that make coding more interactive and fun by injecting audio reactions and meme culture into developer workflows. These projects explore the VS Code Extension API, event-driven programming, and developer experience experimentation.

📢

Faaah Error Sound

Dramatic alerts for your debugging frustration

A VS Code extension that plays a dramatic "FAAAAH" sound whenever errors or failures occur during development — because silent failures deserve a reaction.

Key Features

  • Detects TypeScript / ESLint / runtime errors
  • Detects terminal command failures
  • Detects task exit codes
  • Cooldown system to prevent sound spam
  • Toggle on/off via settings
JavaScriptVS Code Extension APIonDidChangeDiagnosticsonDidEndTaskProcessonDidCloseTerminal
🤢

Brother Eww – Error Sound

Meme reactions for your coding mistakes

Reacts to coding mistakes with the iconic "Brother Eww" meme sound whenever errors appear in your editor — turning frustrating bugs into laughable moments.

Key Features

  • Real-time diagnostic error detection
  • Optional warning triggers
  • Build / task failure detection
  • Configurable cooldown system
  • Toggle and test commands
JavaScriptVS Code Extension APINode.js
😂

Meme Dev Sounds

Turn your editor into a meme-reactive environment

An experimental extension that transforms VS Code into a fully meme-reactive coding environment — audio feedback for idle time, resuming work, errors, file saves, and package installs.

Key Features

  • Snoring sound when editor goes idle
  • Snoop Dogg sound when coding resumes
  • Meme reactions for errors and warnings
  • Sound on file open & package install
  • Rare surprise sound on file save
JavaScriptVS Code Extension APIEvent-driven architecture
🔒 Coming Soon

Achievements

🏆

AI HackFest 2023 — Champion

SJ Innovation LLC

Team: QuantoBug

🥈

National Hackathon 2022 — Top 15 Finalist

National Competition

B.Sc. Computer Science & Engineering

American International University-Bangladesh (AIUB)

Major: Software Engineering · 2019 – 2023

Licenses & Certifications

📜

Front-End Development Libraries Certification

freeCodeCamp

Covers the libraries developers use to build modern webpages, including React, TypeScript, and more. Earned by completing five required projects to qualify for the certification exam and then passing the Front-End Development Libraries Certification exam.

🗓 April 2026
🏅

React (Basic)

HackerRank

Validated foundational competence in React.js, including building modular UIs, managing component state/props, and implementing efficient data flow patterns.

🗓 March 2026ID: 06C55FD99F48
🪟

Manage Azure Kubernetes Service on Azure Stack HCI

Microsoft

Focused on deploying and managing containerized workloads in hybrid environments. Covers building scalable, resilient systems using AKS on Azure Stack HCI.

🗓 March 2026
🤖

Integrating In-House AI Models in Power Platform

AZURE STYAVA.DEV

Specialized training on bridging custom AI models with low-code business solutions.

🗓 March 2023
📣

Digital Marketing

SR Dream IT

Core principles of digital strategy and online presence management.

🗓 June 2021

Contact Me

I'm currently open to new roles and freelance projects. I typically respond within 24 hours.