MD Samiul Islam

Backend & Systems Engineer
I'm a final-year Computer Science and Engineering student at Adamas University and a freelance software engineer who builds complete production level applications and systems, APIs, AI-powered applications, and self-hosted infrastructure. I enjoy taking ideas from problem definition to a complete usable and feasible solution.
MD Samiul Islam

Skills

AI & Autonomous Systems (Specialization)
Autonomous AI Agents & Tool Calling
Local LLMs & Ollama Execution
RAG & Vector Search (Qdrant)
Agent Context Memory Subsystem
On-Device WebGPU AI Runtimes
System Architecture & Engineering
Microservices & Distributed Systems
High-Availability DB Architecture
API Design & Security Hardening
Event-Driven & WebSocket Clusters
Rate Limiting & Queue Strategy
Core Backend Runtimes
Node.js & Express Architecture
Python & FastAPI Runtimes
FastAPI
Express.js
REST API Engineering
Databases & Data Systems
MongoDB & Aggregation Pipelines
PostgreSQL & Relational Modeling
Redis In-Memory Cache
Qdrant Vector DB
Prisma ORM
Payments & External Services
Stripe Subscription & Billing API
Razorpay Gateway & Webhooks
Twilio Messaging & Voice Services
Google Cloud & Maps Platform
Infrastructure & DevOps
Linux Systems & Shell Scripting
Docker & Container Orchestration
Nginx Reverse Proxy & Load Balancing
Self-Hosted Infrastructure
Git & GitHub Actions
Frontend & Mobile Applications
JavaScript (ES6+) & TypeScript
React.js
Next.js (App & Pages Router)
React Native (Android B2B Apps)
TailwindCSS & Modern UI
Vite
HTML5 & CSS3 Standard
Engineering Workflow

My Workflow

A disciplined, end-to-end engineering methodology for building resilient backend systems, AI infrastructure, and production apps.

01

Understand

Analyze & Deconstruct

Deconstructing complex business logic, mapping data flows, and defining edge cases to align perfectly with project goals.

Requirements & Logic
02

Design

Architect & Model

Architecting resilient database schemas, API contracts, caching layers, and decoupled system boundaries tailored to the application.

Schemas & Architecture
03

Build

Develop & Refine

Writing modular, type-safe, and self-documenting code with comprehensive logging, error handling, and automated test coverage.

Quality Code & Logic
04

Deploy

Launch & Delivery

Deploying seamless, production-ready applications onto your designated platform or required cloud infrastructure with zero operational friction.

Target Infrastructure
05

Iterate

Analytics & Refinement

Tracking real-world system analytics, operational usage, and real feedback to continuously optimize performance and refine features based on evolving client requirements.

Real-World Analytics
Verified Client Feedback

Client Reviews & Testimonials

Verified 5-star feedback from client projects, custom software contracts, and freelance engineering delivery.

Hire Me on Fiverr
5.0 Rating

“You are the best, you have a very good technical skill, I love to work with you. It is one of my best decisions to work with you.”

@AxelMagoma

South Africa 🇿🇦

Fiverr Order
5.0 Rating

“Samiul went above and beyond my expectation. Truly a great person to work with”

@soreti_

Canada 🇨🇦

Fiverr Order
5.0 Rating

“Highly recommend, best experience working with him.”

@john_andrew22

Cyprus 🇨🇾

Fiverr Order
5.0 Rating

“Did exceptional work and so responsive and helpful!”

@brellus

Canada 🇨🇦

Fiverr Order
5.0 Rating

“This has been nothing but an exceptional experience!!!”

@Verified Client

International 🌍

Fiverr Order
5.0 Rating

“Does an incredible job!”

@brellus

Canada 🇨🇦

Fiverr Order
5.0 Rating

“Really good skills and unbelievable commitment”

@reshigangovend

South Africa 🇿🇦

Fiverr Order
5.0 Rating

“Great work.”

@john_andrew22

Cyprus 🇨🇾

Fiverr Order

Development & Delivery Process

Step 01

Understand

Understand the business problem, user requirements, technical constraints, and desired outcome.

Step 02

Design

Break the problem into modular components and design a clean, practical system architecture.

Step 03

Build

Implement the required backend logic, database schemas, APIs, integrations, and interfaces.

Step 04

Deploy

Containerize, configure servers, deploy to target environment, and establish health monitoring.

Step 05

Iterate

Test in production, gather empirical telemetry, refine software implementation, and maintain reliability.