Portfolio
Md Sajjadur Rahaman
Full Stack Developer · DevOps · AI Practitioner
$ cat /engineers/md-sajjadur-rahaman.md
Full Stack Developer building end-to-end products across frontend, backend, and cloud infrastructure. Experienced in shipping scalable web platforms, API-driven services, and AI-powered features with production reliability.
Status: building production full-stack products with ai + cloud
$ render --scene cloud-core --links realtime
session://prod-shell
$ init portfolio-stack --profile sajjadur
[ok] backend services online
[ok] ai inference bridge connected
[ok] cloud cluster synced
neural-flow: 98.7%
cloud-uptime: 99.99%
inference-latency: 41ms
$ _
deploy / monitor / infer / autoscale / queue / secure / observe / integrate / deploy / monitor / infer / autoscale
$ capabilities
Core Competencies
Full-stack depth across frontend, backend, cloud, and AI integration for shipping reliable digital products.
Frontend Engineering
- Next.js
- React + TypeScript
- Tailwind CSS, Shadcn UI
- Responsive UI architecture
- Accessible component design
- Performance-focused UX
Backend & APIs
- Laravel
- WinterCMS
- Express.JS
- RESTful APIs
- Authentication & authorization
- Cron jobs & Queue processing
Databases & Data
- MySQL, MariaDB, PostgreSQL
- MongoDB, SQLite
- Redis, Memcached
- Relational schema design
- Data modeling and optimization
- Large-scale exports and reporting
Cloud & DevOps
- Linux (Ubuntu, CentOS, Amazon Linux)
- Docker, Kubernetes
- Nginx, Apache
- CI/CD pipelines, Automation
- Cloud deployment and cost optimization
AI & Integrations
- OpenAI API
- Azure OpenAI / Azure AI Services
- Google Gemini API
- Anthropic Claude API
- Secure API integrations
Platforms
- iOS, iPadOS, macOS, tvOS, watchOS, Android
- Windows and Linux desktop environments
- SwiftUI (shared multi-target architecture)
- Expo / RN, Flutter, Tauri, Kotlin Compose
$ systems
Latest Projects
Recent production systems across backend APIs, real-time services, and cross-platform products.
System
Flowpamine: AI Project Management & Knowledge App (Desktop)
Offline-first AI project management and knowledge organization desktop app.
$ service/desktop-workspace
Desktop Workspace
- Workmap, Canvas, Kanban, Calendar, and Card Library in one app
- Unified workspace for projects, tasks, notes, and documents
$ service/ai-intelligence-layer
AI Intelligence Layer
- Local LLM-powered summaries, task breakdowns, scheduling, tagging, and related ideas
- Optional cloud AI for heavy tasks like document merge and canvas organization
$ service/rag-&-semantic-search
RAG & Semantic Search
- RAG recommendations and vector search across notes and documents
- Semantic caching with LRU + TTL for faster repeated responses
System
Flowpamine: Real-Time Collaborative Project Management Platform (Backend API)
Real-time collaborative project management platform backend API.
$ service/real-time-whiteboard-engine
Real-Time Whiteboard Engine
- Create, update, and delete notes, tasks, and areas in a shared board
- Broadcast live changes to all connected clients via WebSockets
$ service/integration-&-scheduling-services
Integration & Scheduling Services
- Google Drive, OneDrive, and SharePoint file integration
- Microsoft Graph-powered calendar sync and event notifications
$ service/reliability-&-operations
Reliability & Operations
- Queue-backed persistence for concurrent collaboration workloads
- Custom artisan command suite for cleanup, renewal, sync, and recurring events
System
Property Management & Clubhouse Platform (Backend API)
Winter CMS backend APIs for resident services, property operations, and clubhouse workflows.
$ service/resident-access-services
Resident Access Services
- Visitor approval workflows with QR pass generation
- Resident-facing access and notification APIs for mobile and web clients
$ service/property-&-clubhouse-operations
Property & Clubhouse Operations
- Units, blocks, floors, settings, and resident data management
- Activities, facility reservations, monthly passes, and residency requests
$ service/notifications-&-reporting
Notifications & Reporting
- Push notifications via Firebase/Expo
- Reporting workflows with create, list, reply, and delete actions
$ engineering focus
How I Build
Full-stack systems designed for usability, scalability, security, and long-term maintainability.
01
End-to-end product ownership from UI to infrastructure
02
Clean architecture across frontend and backend layers
03
Scalable APIs and resilient distributed services
04
Production observability, reliability, and performance
05
Security-first development and integration patterns
Contact
Let’s Build Something Reliable
Open to backend engineering, DevOps, and AI systems work where architecture quality, performance, and production reliability matter.