I am a highly motivated and enthusiastic Backend Developer with 8 years of experience building web applications using Python and related technologies. I am well prepared to work with Machine Learning (ML) and Artificial Intelligence (AI), so now looking for an opportunity to apply my knowledge to deliver exciting new projects in this area! I'm passionate about programming and have consistently delivered high-quality, scalable, and robust solutions that meet my client's needs. I have experience working in international markets. One of my strengths is the ability to create the final product while working in an international team united by a common goal. TECH STACK ✅ PROGRAMMING LANGUAGES: Python, Javascript ✅ FRAMEWORKS/LIBRARIES: Django, Flask, FastAPI, Aiohttp ✅ DATABASES: MySQL, PostgreSQL, MongoDB, Redis, Elasticsearch ✅ AI/ML STACK: Streamlit, Gradio, Python notebooks, LlamaIndex, Langgraph, Langchain, RAG, Embeddings, LLM, FineTuning, NPL, vector database, graph database, Knowledge Graph, OpenAI, Gemini, Groq (LLama2, LLama3, Gemma, LLava, etc), Ollama ✅ OTHER: Celery, AWS, Digital Ocean, Sockets PORTFOLIO ✅ Onboard charging system. I discussed the requirements with the client, developed several modules, and tested the codebase. ✅ Web application with an emulator of charging stations and central. I designed models for databases, created endpoints, and implemented OCPP 1.6 functionalities. ✅ Development of an app for tracking races and for racing statistics. I developed API service using the Django REST framework, designed database models, covered code with unit tests, integrated with the Stripe payment system, and mentored junior developers on best practices and programming techniques. ✅ Car auction platform which allows users to buy cars. I performed code review and code refactoring, created internal tools for parsing data, covered code with unit tests, and implemented new features ✅ CRM system for casino based on popular casino engine. In this project, I developed a serverless API service using AWS Lambda, AWS API gateway, and serverless framework for Node.js, delivered code review and code refactoring, and designed models using serverless CMS Webiny and GraphQL. ✅ Development of an app for tracking students and study unit (Universities, Colleges, schools) processes. I worked on a team to develop a web-based application using Python and Django, participated in code reviews, bug fixing, and testing activities, and assisted in the application deployment on the production server. ✅ A system for boat or yacht reservations. I developed and maintained a Python-based application, designed database models, integrated with the Stripe payment system, implemented sockets chat using Django channels, and developed and maintained the front-end part using jQuery, HTML5, and CSS3. LANGUAGES I SPEAK Ukrainian is my native language. Besides, I have strong English skills. Most of my previous customers were English-speaking, so I am comfortable communicating in English. MY TEAM I am at ease as an individual contributor, but being a team player works best for me. So I joined Extrawest — an Upwork Top Rated Agency specializing in FinTech and Banking, Gambling and Betting, Food Ordering and Delivery, Logistics and Fleet Management, Medical Insurance and Healthcare, and special software for Electric Vehicles Charging Station networks since 2006. Having most of our resources based in Europe, we’ve been working with customers from over 20 countries (the US, Canada, Australia, most of the EU, South Africa, Singapore, Japan). Hence, it won’t be a problem for us to adjust to your timezone and working schedule. INVITE ME FOR AN INTERVIEW If you feel I’m a good fit for your project, let's discuss how I can help streamline your business’s growth! 🟩 🟩 🟩 🟩 My Agency Skills: Front-End (Frontend) Development, Back-End (Backend) Development, Full-Stack (Fullstack) Development, Mobile Development, Artificial Intelligence (AI), Machine Learning (ML), EV Charging, eMobility, OCPI, OCPP, Automotive, Logistics, Delivery, Food Ordering, FinTech, Healthcare, Insurance, Betting, Gambling, Flutter, Dart, JavaScript (JS), TypeScript (TS), Angular, Vue.js (VueJS, Vue), React.js (ReactJS, React), Node.js (NodeJS, Node), Java, Spring, SpringBoot, Hibernate, Python, Django, Scrapy, Quality Assurance (QA), Manual Testing, Automated Testing, UI/UX Design, Figma, Adobe Creative Cloud, DevOps, MySQL, PostgreSQL, MongoDB, Firebase, Docker, Amazon Web Services (AWS), Google Cloud Platform (GCP), Project Management (PM).

Hello, I am a Full-Stack Developer & AI/ML Engineer with 4+ years of experience building intelligent, scalable, and user-friendly solutions. My work blends the power of AI with beautiful, functional web applications perfect for businesses looking to stand out with data-driven tools and modern user interfaces. On the AI/ML side, I build smart systems using Python, TensorFlow, PyTorch, Scikit-learn, and I specialize in deep learning, NLP, and computer vision. Whether you are looking for a custom prediction model, chatbot, recommendation engine, or image recognition pipeline - I deliver with accuracy, performance, and production-readiness. In web development, I work with the MERN stack (MongoDB, Express, React.js, Node.js), pairing it with Tailwind CSS for clean, responsive, and blazing-fast frontends. From admin dashboards to full SaaS apps, I bring pixel-perfect design and scalable architecture together. 🔧 My Technical Expertise - AI/ML model development (NLP, vision, prediction, LLM fine-tuning) - Deep learning using CNNs, RNNs, Transformers - Frontend development with React + Tailwind CSS - Backend APIs using Python, Node.js/Express - Fast, mobile-first UIs using modern frameworks - ML deployment via Flask/FastAPI or cloud (AWS/GCP) I value quality, transparency, and long-term success. Let’s turn your idea into a solution that not only works - but wows. Ready to collaborate? Hit the "INVITE" button and I will be at your service. Thank you, Lalit.

I build the data infrastructure that makes LLMs actually work in production, RAG pipelines, vector search, and AI agents that don't hallucinate on your company's real data. Before AI, I spent 8 years as a Data Engineer building pipelines with [Python/SQL/Spark/Airflow/dbt, your actual stack]. That background is exactly why my AI systems don't fall apart at scale: I know how to move, clean, and structure data before an LLM ever touches it, which is where most "AI integrations" quietly fail. What I do: → Design and build RAG systems (retrieval-augmented generation) using Pinecone/Weaviate/pgvector/Chroma → Build production LLM pipelines with [LangChain/LlamaIndex/OpenAI API/Anthropic API] → Design embedding pipelines and vector databases that scale past prototype stage → Build AI agents and chatbots that connect to real business data, not toy demos → Handle the "boring" parts most AI freelancers skip: chunking strategy, latency, cost optimization, evaluation Recent results: ✅ "Cut RAG query latency by 60% on a 10M-vector index" ✅ "Built a support chatbot that reduced response time from 4 hrs to 90 seconds" ✅ "Migrated a client's AI prototype into a production pipeline handling 50K docs" I work best with: - Startups building their first AI product who need it to actually ship - Companies with an existing data stack who want to layer LLM capability on top - Teams whose "AI feature" broke in production and need someone who understands both data and models If your project involves LLMs touching real company data not just prompt-tweaking, let's talk. Send me your use case and current stack, and I'll tell you honestly whether RAG is even the right approach for it.

I am a Full Stack Python & Backend Engineer and Tech Lead with 5+ years of experience building and Leading scalable web applications, APIs, and AI-powered systems. I specialize in Django, NextJS, FastAPI, and backend architecture, focusing on building clean, production-ready, and high-performance systems followed by Leading and Managing Team and Overlook Development across the Team 💻 Core Skills: Python, Django, FastAPI, Flask, React, PostgreSQL, MongoDB, NextJS ☁️ Cloud & DevOps: AWS, GCP, Docker, CI/CD 🧠 AI Integration: LLMs, OpenAI APIs, RAG systems, data pipelines 🔧 Expertise: REST APIs, SaaS platforms, system design, backend optimization I focus on scalable backend systems, clean architecture, and real-world production solutions — not just prototypes. Available for full-time / part-time freelance projects. I respond quickly and can start immediately. Keywords: Full Stack Python Developer · Python Developer · Backend Developer · Django Developer · FastAPI Developer · Flask Developer · React Developer · Next.js Developer · TypeScript Developer · TailwindCSS Developer · REST API Development · GraphQL API · Django REST Framework · API Integration · Third Party API Integration · JWT Authentication · OAuth Integration · Stripe Integration · PayPal Integration · Webhook Integration · SaaS Development · SaaS Platform · Multi-tenant SaaS · B2B SaaS · MVP Development · Custom Web App · Web Application Development · Admin Dashboard · Real-time App · WebSocket App · PostgreSQL Developer · PostgreSQL Optimization · MySQL Developer · MongoDB Developer · Redis Caching · Elasticsearch Developer · Database Design · Database Migration · Database Optimization · Docker Deployment · Docker Containerization · CI/CD Pipeline · GitHub Actions · DigitalOcean Deployment · Heroku Deployment · Server Automation · Celery Task Queue · Background Job Processing · Async Python · Task Automation · Web Scraping · Data Scraping · Selenium Automation · Playwright Scraping · Scrapy Developer · Data Automation · Data Pipeline · ETL Pipeline · Pandas Developer · Microservices · Microservices Architecture · API Gateway · Scalable Backend · High Performance API · Python Automation Developer · Django SaaS Developer · FastAPI Microservices · Next.js SaaS · React Dashboard Developer · Python Data Pipeline · Full Stack MVP Developer · Python API Developer · Subscription Billing · Payment Integration

🚀I am a Full Stack Developer with 6+ years of experience specializing in React.js, Next.js, TypeScript, Python, Node.js, C#, .NET and cloud computing. I have strong expertise in frontend & backend development, API design, SQL and NoSQL databases, and building scalable systems on AWS. I deliver high-quality web applications using modern frameworks like NestJS and Tailwind CSS, with a focus on performance, security, and user experience. Passionate about solving complex problems and continuous learning, I thrive in collaborative, fast-paced environments. 💪I continuously invest in my skills and hold certifications in Full Stack Development (Growdev), Backend and Python & Cloud Computing (Tera Treinamentos Profissionais LTDA), and React.js (Tera Treinamentos Profissionais LTDA). I also completed the NLW Connect React Program with Rocketseat, deepening my expertise in modern React ecosystems. 💼 Tech Stack Highlights: ● Frontend: React.js, Next.js, Angular, TypeScript, JavaScript, Tailwind CSS, MUI ● Backend: Node.js, Express.js, Python, Django, FastAPI, C#, .NET, RESTful APIs, ● Databases: SQL, PostgreSQL, MySQL, MongoDB, Firebase, ● Cloud & DevOps: AWS (S3, Lambda, API Gateway, ECS), Azure, Docker, Kubernetes, CI/CD pipelines ● Authentication: OAuth2, JWT, Firebase Authentication ● Other Tools & Technologies: Postman, Git, Stripe integration, AI/ML, Large Language Models (LLMs) 🔧 I’m passionate about solving real-world problems, bringing clean, efficient code and clear communication to every project. Whether you're starting from scratch or scaling an existing system, I'm here to build with you—fast, reliably, and professionally. Let's connect and embark on a journey to create software that stands out and delivers results!

I’m Waqar, a senior full-stack engineer who lives and breathes Node.js, Python, and React. Over 12 years I’ve shipped 70+ production apps and logged 3.8k Upwork hours, helping startups and enterprises launch fast, scalable products. Backend APIs & Microservices — Express/NestJS (Node) and FastAPI/Flask (Python) with PostgreSQL, MongoDB, Redis. Frontend — Modern React.js & Next.js UIs that load fast and feel smooth on every device. AI Integrations — GPT-4 chatbots, LLM workflows, and ML pipelines that add real intelligence. Cloud & DevOps — Docker, CI/CD, AWS & GCP—zero-downtime deployments, cost-optimized. I value clean architecture, thorough testing, and proactive communication across time zones. If you need a developer who can own the entire stack, infuse AI capabilities, and deliver on time—let’s talk.

I’m a Senior Python Engineer and Full Stack Developer with 8+ years of experience building web scraping infrastructure, automation platforms, backend systems, and scalable data engineering solutions for startups, SaaS products, trading companies, and data-driven businesses. Clients usually contact me for projects related to Python development, Full Stack development, backend development, backend APIs, web scraping, data extraction, browser automation, Playwright automation, Selenium automation, Scrapy development, ETL pipelines, workflow automation, automation systems, API integrations, real-time data processing, AI automation, OpenAI integrations, scalable backend systems, sportsbook software, betting systems, odds aggregation, analytics platforms, SaaS products, and high-load real-time data systems. Why clients work with me ✔ 8+ years of Python engineering experience ✔ 6+ years of Full-Stack engineering experience ✔ $400K+ earned on Upwork ✔ Top Rated Plus freelancer ✔ Production-grade scalable architectures ✔ Strong communication and reliable delivery ✔ Experience with high-load real-time systems ✔ Long-term technical partnership mindset My main stack includes: Python • FastAPI • Django • Flask • AsyncIO • REST APIs • GraphQL • Playwright • Selenium • Scrapy • WebSockets • Microservices • Celery • SQLAlchemy • Backend Architecture - Web Scraping & Data Engineering Playwright • Selenium • Scrapy • BeautifulSoup • Requests • Browser Automation • Data Extraction • Web Scraping • Data Mining • ETL Pipelines • Proxy Management • Pandas • NumPy • Dask • Scikit-learn • TensorFlow • PyTorch • XGBoost • OpenCV - Advanced Scraping Infrastructure Cloudflare • DataDome • Akamai Bot Manager • PerimeterX • reCAPTCHA • hCaptcha • Residential & Mobile Proxies • Session Management • Authentication Workflows • Browser Fingerprinting - Full Stack Development React • Next.js • TypeScript • JavaScript • HTML5 • CSS3 • Tailwind CSS • Admin Dashboards • SaaS Applications • Analytics Dashboards - Cloud, DevOps & Infrastructure Docker • Kubernetes • AWS • Google Cloud • Azure • GitHub Actions • GitLab CI/CD • Terraform • Ansible • Nginx • Linux AI & LLM Development OpenAI API • GPT-4 • Claude • Llama • AI Agents • RAG • Prompt Engineering • AI Automation • LLM Integrations • As a Full Stack Developer and backend developer, I build backend systems, APIs, automation platforms, web applications, analytics dashboards, browser automation workflows, admin panels, and scalable real-time data products designed for production environments. Web Scraping & Automation As a Python developer specializing in web scraping and automation systems, I build scalable scraping infrastructure for dynamic websites, protected platforms, APIs, marketplaces, SaaS products, and analytics systems. Scraping and automation projects include: • Large-scale web scraping systems • Data extraction pipelines • Browser automation with Playwright and Selenium • Scrapy-based scraping infrastructure • API reverse engineering and API integrations • Proxy management and anti-bot workflows • Marketplace and e-commerce data collection Backend Development & Automation Systems As a Full Stack Developer and backend developer, I also build scalable backend systems, backend APIs, automation infrastructure, workflow automation platforms, web applications, and real-time backend services. Typical backend and automation projects include: • Backend API development • Workflow automation systems • Real-time automation platforms • Monitoring and reporting systems • Data synchronization systems • Internal business automation tools • Web applications and admin dashboards • Cloud-based backend infrastructure Clients hire me as a Python developer and Full Stack Developer when they need scalable backend systems, automation workflows, real-time data processing, or production-grade infrastructure that can support long-term product growth. Sportsbook & Betting Systems I have strong hands-on experience building sportsbook software, betting systems, odds aggregation platforms, sportsbook data systems, and real-time betting infrastructure running in production environments. • Real-time sportsbook odds aggregation systems • Arbitrage and positive EV analytics platforms • Betting automation and execution systems • Historical odds databases and backtesting engines • Sports analytics dashboards and reporting systems • Odds monitoring and alerting systems AI Automation & Data Infrastructure • AI data collection pipelines • OpenAI API integrations • AI automation workflows • RAG and knowledge base infrastructure • AI enrichment and structured data processing If you need a Python developer, Full Stack Developer, backend developer, or automation developer who can build scalable backend systems, automation infrastructure, web applications, sportsbook systems, or real-time data products, feel free to reach out.

I'm Ashik Zinnat Khan, a senior full-stack developer specializing in back-end development using Python and Django. I have more than 10 years of development experience and am willing to take on new challenges. The types of projects that I'm most interested in are: - Django - Django REST Framework - Flask - FastAPI - AI Chatbot Development - RAG Chatbot - AI Service Integration (OpenAI, Mistral, Claude) - Node.js - Docker - React, Next.js, Angular - DevOps & Deployment (AWS, DigitalOcean, Linode) - Kodi add-on development If you have a project that you would like to get me involved in, please don't hesitate and let's connect. Thanks for visiting my profile!

I help businesses build scalable cloud solutions, AI-powered applications, and intelligent automation systems that reduce costs, improve efficiency, and accelerate growth. With 16+ years of software development experience and deep expertise in AWS, Artificial Intelligence, Generative AI, and business process automation, I have successfully delivered solutions for startups, SMBs, and enterprise clients across healthcare, finance, compliance, customer support, and SaaS industries. My expertise includes: • AWS Architecture & Cloud Migration • Serverless Applications (Lambda, API Gateway, DynamoDB) • DevOps & CI/CD Automation • Generative AI Applications (OpenAI, Claude, Gemini, Bedrock) • AI Agents & Agentic Workflows • RAG (Retrieval-Augmented Generation) Systems • AI Chatbots & Virtual Assistants • Document Processing & OCR Solutions • Workflow Automation (n8n, Make, Zapier, Custom Solutions) • Vector Databases (Pinecone, pgvector) • AWS Bedrock, SageMaker, Textract, Rekognition, Transcribe • Multi-Agent AI Systems • Web & Mobile Application Development Why work with me? ✓ AWS Partner Experience ✓ 13+ Years of Software Development Experience ✓ Proven Track Record of Delivering Production-Ready Solutions ✓ Strong Communication & Project Management ✓ Long-Term Client Relationships ✓ Focus on Business Outcomes, Not Just Technology Whether you need an AI-powered SaaS platform, cloud architecture review, intelligent document processing, AI agents, or business process automation, I can help turn your ideas into scalable, reliable solutions. Let's discuss your project and identify the best approach to achieve your goals.

I build resilient backend systems, robust test automation frameworks, and high-performance web scraping pipelines. As a core Python developer, I focus on engineering maintainable and scalable software architecture rather than just writing scripts. Whether it’s a production-grade API, a stable end-to-end test suite, or complex data extraction from protected websites, I deliver clean and reliable solutions. What I Do Best: ✅ Python Backend Development Design and scale robust backends, RESTful APIs, and efficient data processing systems with a strong focus on performance and maintainability. ✅ QA Automation & End-to-End Testing Build stable, flake-free automation frameworks using Playwright and Selenium (Python & TypeScript), including complex UI handling such as iframes, Shadow DOM, and multi-tab workflows. ✅ Advanced Web Scraping Develop high-success-rate scraping systems for modern web architectures, including handling anti-bot protections like Cloudflare, Akamai, and DataDome. ✅ Process Automation Automate repetitive browser workflows and API integrations to reduce manual effort and improve operational efficiency. Tech Stack & Expertise: ✅ Languages: Python, TypeScript, JavaScript, SQL ✅ Frameworks: Playwright, Selenium, PyTest, FastAPI, Flask, Django ✅ Specializations: Backend architecture, API integration, bot mitigation strategies, cross-browser testing, CI/CD automation Let’s connect to build reliable, scalable, and production-ready systems with strong confidence in backend stability and data automation.