Amir Hossein Shamsi

Hi, I’m
Amir Hossein
Shamsi.

Backend Engineer (Python & .NET)· ML & LLM Enthusiast

I build high-performance backend systems — from graph-powered .NET platforms and real-time geo-tracking to memory-enabled LLM chatbots and geospatial engines.

FOCUS AREAS

Backend Architecture AI-powered Apps Geospatial Systems

🚀 Featured Projects

Production-grade backend systems built with .NET, Python, graphs, geo & AI

🕸️

Core Implemented
PostgreSQL + Neo4j

Supply Chain Impact Analysis Platform

Graph-powered business continuity analysis · .NET

A .NET backend modeling supplier → product → warehouse → store dependencies. PostgreSQL is the source of truth; Neo4j traverses the network to answer one critical question: "If a supplier goes down, what's affected?"

One-call impact analysis — GET /api/suppliers/{id}/impact

Modular Clean solution — API · Application · Domain · Infrastructure

Dockerized databases with EF Core auto-migrations & sample data

20+ REST endpoints with Swagger / OpenAPI docs

.NET 10 ASP.NET Core EF Core PostgreSQL Neo4j Docker Compose Redis RabbitMQ

MVP complete Redis caching & RabbitMQ events on the roadmap →

View Code

⚡ Live Impact Traversal

🏭 Acme Electronics

💾 Microchip A1

🟩 PCB Board X

🏢 North DC

🏢 South DC

🏪 Store A

🏪 Store B

🏪 Store C

Every request refreshes the graph from PostgreSQL, then traverses it

🛰️ Live Tracking Simulation

LIVE

lat 35.7300 · lon 51.3700

WebSocket OSRM Routing Redis Pub/Sub

🚚

FastAPI · Python
Real-Time · Event-Driven

Real-Time Geo-Tracking Application

Live package tracking with WebSockets & Redis Pub/Sub

A proof-of-concept real-time package tracking system — FastAPI backend, MongoDB storage, Redis pub/sub messaging, and Folium map visualization. Watch a 🚚 animate along an OSRM-optimized route in real time, no page refresh needed.

Real-time WebSocket updates — package marker animates live on the map

OSRM route planning — optimal driving routes + smart branch waypoint chaining

Event-driven fan-out — background simulation publishes to Redis, listener broadcasts to all clients

Async backend — FastAPI + Uvicorn for high-performance I/O

FastAPI Uvicorn MongoDB Redis Pub/Sub WebSockets Folium Project-OSRM Docker

Proof-of-Concept status 100% — all 6 core features shipped

View Code

🌍

Fully Implemented
Clean Architecture · CQRS · DDD

AddressIntel 📍

Enterprise geospatial address intelligence engine · .NET

A .NET 10 geocoding engine for Persian address management — strict domain invariants via immutable Value Objects, full CQRS with MediatR, and PostGIS GiST-indexed radius search at O(log N) complexity.

DDD Value Objects — 10-digit postal code regex & Plaque invariants enforced

Spatial search — Point (WGS 84) + GiST index for millisecond radius queries

Global NoTracking reads — low-memory, high-throughput query pipeline

EF Core ComplexProperty — Value Objects mapped flat, no extra tables

.NET 10 Web API PostgreSQL 16 + PostGIS EF Core 10 NetTopologySuite MediatR 14 FluentValidation Swashbuckle Docker Compose

Implementation status 100% — all core features shipped

View Code

📍 Radius Search · SRID 4326 · O(log N)

📍

GiST Index PostGIS 3.4 radiusInMeters=1000

💬 Live Multi-Model Chat

QUANTUMLEAP · gpt-4.1

Explain quantum computing simply 🙋

Think of a spinning coin — heads and tails at once, until you look 🤖

Switch to Gemini ⚡

Done — full context preserved, ask away 🧠

LangChain Memory Real-time Streaming Multi-Model

🤖

Streamlit · LangChain
LLM · Multi-Model · Memory

QuantumLeap GPT 🤖✨

Memory-enabled chatbot with multi-model support

A sophisticated LLM chatbot interface combining the power of GPT-4.1, Gemini 2.0 & GPT-4o Mini with persistent conversation memory via LangChain. Sleek dark theme, glass-morphism UI, and real-time streaming responses.

Multi-model switching — change models mid-conversation, context stays intact

ConversationBufferMemory — chat history & context persist across sessions

Real-time streaming — live typing indicators & instant animated responses

Session management — save, load & preview chats with one-click memory cleanup

Streamlit LangChain GPT-4.1 Gemini 2.0 GPT-4o Mini Liara API Python 3.8+

Implementation status 100% — shipped & deployable

View Code

🚧 Currently Building

Innovative projects at the intersection of AI and engineering

🤖

LLM-Powered Chatbots

Memory-enabled conversational AI with LangChain — see QuantumLeap GPT above 👆

LangChain OpenAI

🔍

RAG Pipelines

Contextual search and intelligent retrieval systems

Vector DB Embeddings

🔧

ML + Backend Tools

Combining Machine Learning with robust backend engineering

FastAPI .NET

🌱 Exploring & Growing

📚 Deep Learning

PyTorch TensorFlow

🔍 Vector Search

FAISS Pinecone

🕸️ Graph & Spatial

Neo4j PostGIS

⚡ Real-Time & Geo

WebSockets MongoDB OSRM

🤖 LLM Applications

LangChain Streamlit Multi-Model

🐳 DevOps & Messaging

Kubernetes RabbitMQ Redis

Ask Me About

Technologies I work with daily

FastAPI Django Flask AsyncIO LangChain Streamlit C# / .NET 10 ASP.NET Core RAG Pipelines Elasticsearch PostgreSQL MongoDB Neo4j Redis

🧠Machine Learning

PythonExpert

PyTorchAdvanced

TensorFlowAdvanced

🐍Python Backend & LLM

FastAPIExpert

LangChain / LLM AppsAdvanced

AsyncIOExpert

🏗️.NET Engineering

C# / .NET 10Expert

ASP.NET CoreAdvanced

EF Core + CQRSAdvanced

🗄️Databases & DevOps

PostgreSQLExpert

Neo4j / MongoDBAdvanced

Docker / RedisAdvanced

✨ Fun Facts

🔁 Obsessed with clean code, async IO, and reproducible ML workflows.
🕸️ Recently fell in love with graph databases & geospatial tech — ask me about Neo4j traversals or PostGIS GiST indexes!
🚚 Once built a system where you can watch a truck drive across a city in real time — WebSockets are magic.
🤖 Built a chatbot that switches between GPT-4.1 and Gemini mid-conversation without forgetting a thing.
🌍 Always learning and exploring new technologies to solve complex problems.

📬 Get in Touch

Ready to build something extraordinary together? Let's collaborate on your next backend, AI, or graph-powered project!

📧

Email Me

Drop me a line for project discussions

Send Email

💻

View My Code

Check out my latest projects and contributions

GitHub Profile

Let's Build Something Amazing

🤝 Open to collaborations • 💡 Always learning • 🚀 Ready for new challenges

Technology	Role	Status
.NET 10 / ASP.NET Core	REST API & application runtime	Implemented
Entity Framework Core	Relational mapping & migrations	Implemented
PostgreSQL	Source of truth for entities & relationships	Implemented
Neo4j + Neo4j.Driver	Graph representation & impact traversal	Impact analysis
Docker Compose	Local database & service containers	Configured
Swagger / OpenAPI	Interactive API docs in Development	Implemented
Redis + StackExchange.Redis	Intended cache for graph results	Not connected yet
RabbitMQ + MassTransit	Intended async event processing	Not connected yet

Resource	Operations
Suppliers	List · Get by ID · Create · Update name/address · Deactivate · Delete · Analyze impact
Products	List · Get by ID · Create · Discontinue · Delete
Warehouses	List · Get by ID · Create · Mark offline · Delete
Stores	List · Get by ID · Create · Delete

Technology	Role
FastAPI + Uvicorn	Asynchronous backend framework & ASGI server
MongoDB + pymongo	Package, route & branch persistence
Redis + redis-py	Decoupled pub/sub messaging for location updates
Folium	Interactive map visualization (route, branches, animated marker)
Project-OSRM	Optimal driving route calculation engine
WebSockets	Real-time push to connected map clients
requests	HTTP client for OSRM routing calls
Docker / Docker Compose	MongoDB & Redis containers for local dev

Technology	Role
.NET 10 Web API	Core runtime framework
PostgreSQL 16 + PostGIS 3.4	Spatial database engine
EF Core 10	ORM with Npgsql + NetTopologySuite provider
NetTopologySuite	Spatial geometry modeling (Point, Coordinate)
MediatR 14	CQRS in-process messaging & pipeline behaviors
FluentValidation	Request command validation pipeline
Swashbuckle / OpenAPI	API documentation & Swagger UI
Docker & Docker Compose	Multi-container orchestration
xUnit + FluentAssertions	Unit test suite

Model	Provider	Version	Features
GPT-4.1	OpenAI	Latest	Advanced reasoning
Gemini 2.0	Google	Flash-001	Fast responses
GPT-4o Mini	OpenAI	Optimized	Cost-effective

Hi, I’mAmir Hossein Shamsi.

🚀 Featured Projects

Supply Chain Impact Analysis Platform

Real-Time Geo-Tracking Application

AddressIntel 📍

QuantumLeap GPT 🤖✨

🚧 Currently Building

LLM-Powered Chatbots

RAG Pipelines

ML + Backend Tools

🌱 Exploring & Growing

📚 Deep Learning

🔍 Vector Search

🕸️ Graph & Spatial

⚡ Real-Time & Geo

🤖 LLM Applications

🐳 DevOps & Messaging

Ask Me About

🧠Machine Learning

🐍Python Backend & LLM

🏗️.NET Engineering

🗄️Databases & DevOps

✨ Fun Facts

📬 Get in Touch

Email Me

View My Code

Let's Build Something Amazing

Hi, I’m
Amir Hossein
Shamsi.