Hello, I am Rumman!
I am a Full-Stack Software Engineer specializing in Python, Django, Django REST Framework, React.js, Next.js, Flutter mobile application development, artificial intelligence, machine learning, API integration, automation, and scalable SaaS solutions.
I have professional experience building backend systems from scratch, developing secure REST APIs, creating responsive frontend interfaces, developing cross-platform mobile applications, designing analytical dashboards, processing large datasets, optimizing databases, fixing complex bugs, and upgrading legacy applications.
My technical expertise includes:
• Python, Django and Django REST Framework
• React.js and Next.js frontend development
• Flutter cross-platform mobile app development
• Artificial intelligence and machine learning solutions
• Data preprocessing, feature engineering and model evaluation
• Supervised and unsupervised machine learning
• Random Forest, regression, SVM and One-Class SVM
• Species Distribution Modeling and environmental data analysis
• Pandas, NumPy, scikit-learn and Matplotlib
• REST API development and third-party integrations
• PostgreSQL, MongoDB and ClickHouse
• Docker, Jenkins, GitHub Actions and CI/CD pipelines
• SaaS architecture, authentication and business logic
• Automation, web scraping and Slack bot development
• Performance optimization, debugging and application upgrades
I can build complete web, mobile, and AI-powered solutions, including Django backend systems, responsive React.js or Next.js frontends, Flutter mobile applications, and machine learning models connected through secure APIs.
I have experience working with data preprocessing, model development, testing, visualization, predictive analysis, and ecological and environmental datasets. I can also integrate trained machine learning models into web or mobile applications to create practical, data-driven products.
I contributed to Google Summer of Code, where I worked on the pyOBIS open-source Python package, implemented advanced HTTP caching, analyzed ocean-science datasets, created interactive Jupyter notebooks, and developed machine learning workflows for ecological and biodiversity research.
I have also contributed to established open-source projects, including Django, Django REST Framework, Scrapy, Celery and DRF Extensions.
I focus on clean architecture, maintainable code, scalability, performance, and clear communication. I carefully understand project requirements, provide regular updates, and aim to deliver reliable solutions on time.
Whether you need a Django backend, REST API, React or Next.js website, Flutter mobile app, AI or machine learning solution, SaaS platform, analytical dashboard, automation system, database optimization, bug fixing, or application upgrade, I can help turn your idea into a reliable and scalable product.
Thanks !
Data Analysis
Python
Machine Learning
NumPy
Data Mining
Data Scraping
Web Crawler
Beautiful Soup
Scrapy
Python Scikit-Learn
Flask
Web Crawling
Django Stack
FastAPI
Bot Development
AI Bot
Artificial Intelligence
S.M. ATAUL KARIM R.
Dhaka, Bangladesh
$15/hr
4.8
70 jobs
I help startups, agencies, and businesses build secure, scalable, and high-performance web applications using modern technologies and AI-assisted development workflows.
With strong experience in backend engineering, API development, cloud infrastructure, and frontend frameworks, I deliver clean, maintainable solutions that are fast, reliable, and production-ready.
What I Can Help You With
✅ Custom Web Application Development
✅ REST API & GraphQL Development
✅ SaaS Platforms & Business Systems
✅ AI-Assisted Development & Automation
✅ Third-Party API Integrations
✅ Performance Optimization & Security Hardening
✅ Legacy System Upgrade & Modernization
✅ Cloud Deployment & DevOps Setup
Backend & Web Technologies
• Laravel, Django, Spring Boot, Yii2
• Express.js, NestJS
• WordPress, Drupal, Magento
• PHP, Python, Java, JavaScript, TypeScript
• MySQL, PostgreSQL, MongoDB, Redis
Frontend Development
• React.js, Vue.js
• Tailwind CSS, Bootstrap
• Alpine.js, Livewire, HTMX
Cloud & DevOps
• AWS, GCP
• Docker, Kubernetes
• CI/CD Pipelines
• Linux, Nginx, Apache
API & Integrations
• Stripe, PayPal
• Twilio, Firebase
• Slack, Zapier, Xero
• REST APIs & GraphQL
AI Development Workflow
I actively use modern AI development tools to improve delivery speed, code quality, debugging, and architecture planning:
• Cursor
• Claude
• ChatGPT
• GitHub Copilot
Why Clients Work With Me
✔ Clean, maintainable, scalable code
✔ Fast communication & reliable delivery
✔ Strong debugging and problem-solving skills
✔ Production-ready deployment experience
✔ Security-focused development approach
✔ Ability to work independently and take ownership
Whether you need a custom platform, backend API, cloud deployment, or ongoing development support, I can help turn your ideas into reliable software solutions.
Let’s build something great together.
API Development
MySQL
PHP
Laravel
Python
Django
CakePHP
Yii
.htaccess File Creation
Ubuntu
Apache HTTP Server
Node.js
Java
Spring Boot
Flask
Tarin M.
Dhaka, Bangladesh
$20/hr
4.2
122 jobs
With 15+ years of experience in extensive list of technologies, I am able to provide you with high quality, sophisticated, robust solutions that are well tested, efficient, accurate.
I shine at diving into your existing codebase, find the source of issues, and resolve them without breaking another thing.
If you have old legacy code, or a vibe coded program that is not working, I can fix them up for you to clean and conscious code.
Need to automate? Got your back.
Data processing, parsing complex PDF? Sure thing!
You need it, if there is solution for it, I can get it done.
Technologies I am currently working with:
Rust, Python, Axum, SQLAlchemy, FastAPI, Django, PostgreSQL, SQLite, HTMX, ReactJS, Tailwindcss, RunPod, AI/LLM
I am a passionate software engineer who enjoys challenges, and finding solutions. I have extensive experience of diving into existing code, finding issues, and resolve them.
As a hardworking, resourceful engineer who also loves automating things, that usually saves a lot of time, I can provide the best service for the most reasonable costing.
Besides developing data mining applications, automation tools, Websites, I have personal interest in Open Source projects.
Here's a list of, but not limited to, responsibilities I have successfully fulfilled:
◾️ Desktop application
◾️ Refactoring
◾️ Prompt Engineering (Local LLM)
◾️ Machine Learning
◾️ Web development
◾️ Web Scrapers
◾️ Email processing
◾️ Distributed applications
◾️ ETL
◾️ Automation
◾️ Server configuration and deployments
◾️ Bug fixing and code improvements
◾️ High Performance computing
Let's get in touch.
Django Stack
Tailwind CSS
Data Mining
Scripting
Python
Rust
Web Application
RESTful API
Java
TypeScript
GUI Design
FastAPI
PostgreSQL
SQLAlchemy
SQLite
Spring Boot
Web Scraping
Md. Mazba K.
Dhaka, Bangladesh
$16/hr
5.0
4 jobs
Highly experienced developer for your needs. I have been developing web applications since 2014. I will do my best to transform your business ideas into a perfect product. I have provided customized software solutions to many local and global businesses.
My key expertise in:
► Laravel/CakePHP/Codeigniter - Backend development
► Flask Python Framework/Lumen PHP Framework / Node.js - API development
► WordPress - CMS, Blog, Portals
► Scrapy/Beautifulsoup/Selenium - Web scraping
► ReactJS/jQuery JavaScript library - Frontend development
► REST/SOAP - API development and third-party API integrations
► Git - version control, bug tracking
► AWS EC2/AWS S3/AWS RDS/AWS ELB/Google Cloud - Cloud services
► CentOS/Ubuntu/Windows - Servers
Over the years, I have gained the following:
► I have worked with two software development companies since 2015 and leading a team of software engineers
► Helped customers to move their legacy applications to newer technologies
► Support and Maintenance of existing applications/business solutions
► Top-quality architecture and development skills using the latest technologies
► Requirement analysis and service delivery
My software development career:
I started my programming career in 2010 with my bachelor's degree. I participated in ACM-ICPC Asia Regional Dhaka Site Event 2014 sponsored by IBM. I have a good knowledge of algorithms, data structures, and problem-solving. After my graduation, I joined a startup software development company where I was a Software Engineer for 3 years. Then I joined a growing software company as Senior Engineer in Web Application Department. Besides my job, I completed my Master of Computer Science (MSCS), Computer Science in 2019. And last year I have promoted to Assistant Manager(Team Lead) in Web Application Department.
API
CakePHP
AJAX
MySQL
Laravel
PHP
JavaScript
WordPress
CodeIgniter
jQuery
Node.js
React
Python
Flask
API Integration
Sakibur R.
Dhaka, Bangladesh
$17/hr
5.0
3 jobs
Hi,
I am Sakibur Rahman. I am a software engineer with 4+ years of experience. Coding is my passion. By following the passion I gathered a lot of knowledge on these skills:
1. Python
2. Django
3. Html, css, Bootstrap
4. PHP Lravel
5. Java
6. Spring boot and React Js
7. Selenium, Playwright
My Projects:
1. Ecommerce Websites
2. POS
3. ERP
4. CRM
5. Python Data Scraping
6. Smart Contracts using web3
7. Inventory System
8. Rest API's
9. SMS platoform
10. Twilio Inetegration in custom CRM
11. Ringba API Integration
12. Zapier Integration
13. Web crawler & scraping bot
WordPress
PHP
Python
Java
Django
Web Scraping
Android App
Flutter
Selenium
Laravel
Python Script
React
Spring Boot
Haradhan S.
Dhaka, Bangladesh
$30/hr
5.0
28 jobs
**Sovereign AI & RAG Architect | Full-Stack Python | Django, Django-Ninja, PostgreSQL | Custom ERP & Industrial Automation | Algorithmic Trading | DevOps & Cloud Hardening**
---
### 🔥 SPECIAL ATTRACTION: SOVEREIGN AI & AGENTIC RAG (CURRENT TRENDS)
Stop paying the "AI Tax" and risking your intellectual property. I specialize in the global shift toward **Sovereign AI**—building intelligent, high-accuracy systems that *you* own and host.
* **Enterprise Agentic AI & Sovereign RAG Pipelines:** I build "Sovereign RAG" (Retrieval-Augmented Generation) systems that act as expert employees. By grounding AI in your private data using **pgvector** or **Pinecone**, I ensure 100% factual accuracy and zero-trust security.
* **OpenClaw & AnythingLLM Gateways:** I deploy turnkey, web-accessible AI command centers. Your team can use GPT-4, Claude, or local models (**Llama 3, Hermes, Gemma**) through a secure, hardened interface without per-user subscription fees.
* **Specialized RAG Solutions:** Implementation of niche-specific intelligence, including **Lawyer RAG** for legal discovery, medical research assistants, and industrial manual synthesis.
* **Private AI Employees:** Deploy 24/7 autonomous agents using **Ollama** and **OpenClaw** for SEO crawling, market research, and lead generation—all living on your private VPS with zero recurring API costs.
---
### ABOUT ME
I am a Full-Stack Python Developer and AI Automation Specialist with **15+ years of experience** and **150+ projects** delivered worldwide. I don't deliver "demos" that break; I engineer production-grade, Dockerized, and secured ecosystems. My systems are built for long-term stability, featuring automated monitoring, Cloudflare WAF protection, and high-performance architecture.
---
### CORE SERVICES
**1. Enterprise RAG & Agentic AI Orchestration**
Implementation of high-scale vector indexing and "Agentic Tool-Calling." I use **LangChain** and **LlamaIndex** to build systems that don't just "chat"—they actually book meetings, update CRMs, and generate reports.
*Starting at $1,499.*
**2. OpenClaw Enterprise AI Gateway**
Secure, browser-based multi-model routing. I handle the infrastructure hardening (Nginx, Docker, SSL) and model orchestration, allowing your team to switch between OpenAI and local LLMs via a unified, sovereign dashboard.
*Starting at $699.*
**3. High-Concurrency Backend Engineering**
Transitioning sluggish systems into High-Performance Async Python engines. I optimize Django/FastAPI for **sub-50ms latency** and handle 10K+ concurrent users through deep PostgreSQL query tuning and Redis-backed task queues.
*Starting at $899.*
**4. Industrial Intelligence & Custom ERP**
Specialized Manufacturing ERPs for Garments, Textiles, and Heavy Industry. Includes real-time shop-floor visibility, QR/Barcode traceability, and IoT integration (MQTT) to replace manual spreadsheets with a "God-eye view."
*Starting at $4,999.*
**5. Sovereign Business OS (ERPNext & CRM)**
Achieve operational independence with ERPNext or Odoo. Get world-class Accounting, HR, and Supply Chain management with **unlimited users** and zero "per-seat" license fees.
*Starting at $3,999.*
**6. High-Conversion Full-Stack Ecosystems**
Building ultra-lean, SEO-dominant web apps using **Island Architecture (Astro)** and **Nuxt 3**. I eliminate "JavaScript Fatigue" by using HTMX and Alpine.js for instant-load, high-revenue digital storefronts.
*Starting at $2,999.*
**7. Algorithmic Trading & FinTech Automation**
Institutional-grade trading engines for MT5, Binance, and TradingView. Featuring vectorized backtesting (Pandas/NumPy), low-latency WebSockets, and automated risk-management modules.
*Starting at $1,499.*
**8. Cloud Hardening & Zero-Downtime DevOps**
Building unbreakable foundations with GitHub Actions CI/CD, Cloudflare Zero-Trust, and self-healing Dockerized environments.
*Starting at $699.*
---
### TECHNOLOGIES I WORK WITH
* **AI/ML:** RAG Pipelines, LangChain, LlamaIndex, Ollama, Gemma 4, Hermes, AnythingLLM, OpenClaw, Vector DBs (pgvector, Pinecone, Weaviate).
* **Backend:** Python (Asyncio), Django Ninja, FastAPI, Celery, Redis, RabbitMQ.
* **Frontend:** Astro (Island Architecture), Nuxt 3, VueJS, HTMX, Alpine.js, TailwindCSS.
* **Database:** PostgreSQL, MariaDB/ERPNext, MongoDB, Redis, Supabase.
* **DevOps/Security:** Docker, GitHub Actions, Nginx Hardening, Cloudflare WAF, Linux VPS, MQTT/IIoT.
* **FinTech:** MQL5, MetaTrader 5, Binance API, Pandas, Pine Script.
---
### WHY HIRE ME?
* **150+ Projects Delivered:** 100% satisfaction and 5-star reputation.
* **Data Sovereignty First:** I build systems that *you* own, ensuring your data never leaves your control.
* **Transparent Pricing:** Fixed deliverables, defined timelines, and zero "ghosting."
* **Priority Support:** Post-delivery documentation, training, and a 2-hour res
API Integration
Python
CRM Development
Django
Web Development
ERP Software
RESTful API
Ecommerce Website
OpenCart
Web Scraping
Data Analytics
Web Application
Ecommerce Website Development
SQL Programming
Nuxt.js
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