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🏆 Top Rated Plus on Upwork, top 3% globally WHAT YOU GET ▸ 9+ years of experience as Python Developer | AI Developer | Backend Developer ▸ 20+ delivered projects across AI SaaS, CRM systems, RAG platforms, legal tech, climate tech, real estate, healthcare, and marketplaces ▸ 5+ AI-powered RAG systems, LLM assistants, document processing pipelines, and OpenAI integrations built from idea validation to production launch ▸ 15+ scalable Python backends with Django, FastAPI, PostgreSQL, Docker, AWS, Stripe with clean architecture, secure APIs, production-ready delivery ACHIEVEMENTS | Client wins from Python AI & backend development ▸ 26-day ROI recovery · built a Recruiting SaaS with Python backend and automated web scraping pipelines that helped a recruitment agency launch faster ▸ 16x efficiency boost · built a custom web application for construction, cutting quoting time from 8 hours to 30 minutes ▸ #4 Product of the Day · delivered an AI Legal Assistant with RAG-powered document search, OpenAI integration, and AI agent workflows for a legal tech startup ▸ 5+ HIPAA‑compliant healthcare platforms · secure backend systems with role‑based access, API integrations, and patient‑provider workflow automation ▸ 10+ CRM & ERP systems · custom Python backends, dashboards, scalable automation, data scraping and reporting tools WHAT I CAN DO FOR YOU ▸ Custom Python backends with Django, FastAPI, or Flask · clean architecture, RESTful APIs, production readiness ▸ AI-powered RAG systems and LLM integration · LangChain, OpenAI API, vector databases, semantic search ▸ AI Legal Assistant · RAG, OpenAI, clause summarization ▸ AI Climate Policy Chatbot · semantic search, citations, hallucination checks ▸ AI‑powered visual search marketplace · image recognition, matching algorithms ▸ AI publishing platform · RAG, automated QA, versioning, observability ▸ AI document intelligence · PDF/DOCX parsing, structured extraction, LLM insights ▸ AI FinTech MVP · Python backend, API integrations, scalable SaaS ▸ Document processing pipelines · PDF parsing, OCR, data extraction, structured output ▸ Data scraping and automation · BeautifulSoup, Scrapy, Selenium, ETL pipelines, scheduled workflows ▸ SaaS platforms and MVPs · user roles, subscription billing, Stripe integration, scalable architecture ▸ Admin dashboards · role‑based access, analytics, reporting, data visualization ▸ AI agents and chatbots · intelligent assistants, conversational AI, automated decision-making ▸ Healthcare and compliance · HIPAA, SOC 2, GDPR-ready backend systems ▸ Real estate, marketplace, CRM · property tracking, user management, workflow automation ▸ PostgreSQL schema design and optimization · scalable database architecture ▸ API integrations · Stripe, OpenAI, Twilio, SendGrid, third‑party RESTful APIs ▸ Infrastructure · Docker, CI/CD, AWS (EC2, S3), Railway, Render ▸ Post‑launch support · maintenance, feature additions, technical guidance ▸ Full‑stack Python & web · React, JavaScript, HTML, CSS, Bootstrap, PHP/Laravel integrations CORE STACK ▸ Backend: Python, Django, FastAPI, Flask, PostgreSQL, Redis, Celery ▸ AI & LLM: OpenAI API, LangChain, FAISS, Pinecone, pgvector, Retrieval Augmented Generation, ▸ RAG pipelines, Vector Search, Semantic Search, Computer Vision (Clarifai) ▸ Data & Automation: BeautifulSoup, Scrapy, Selenium, pandas, ETL Pipelines, PDF/DOCX Parsing ▸ Infrastructure: Docker, AWS, CI/CD, GitHub Actions, Railway, Render ▸ Frontend: React, JavaScript, HTML, CSS, Bootstrap, Next.js As a Python and backend developer, I cover end‑to‑end delivery: architecture, APIs, databases, infrastructure, and AI logic. I work as a Python backend developer, AI developer, Full Stack Python developer, or Python web developer depending on the scope. For AI projects, I act as a Python AI developer, building RAG systems, LLM pipelines, document processing, and intelligent automation, with experience in machine learning and data science. My work also spans Deep Learning, Natural Language Processing, and AI agent development. I also work with PHP and Laravel when integration into existing systems is needed. My web scraping background supports analytics, lead generation, and market research. What sets me apart is product thinking. As a technical partner and software engineer, I define architecture, reduce complexity, and build user‑ready solutions, not just prototypes. My experience spans full stack developer, web developer, php developer, web scraping, machine learning, and data scientist roles, enabling effective cross‑functional collaboration across the entire product lifecycle. Looking for a python developer or backend developer to build or scale your backend? Reach out to me. ✉︎

I have been developing web services, websites and applications since 2005. Now have perfect skills in PHP programming, JavaScript, Node.js, HTML+CSS, MySQL and a bit less in Java, Kotlin, Swift and other mobile applications development techs. I have experience with high-loaded web-services, portals etc, I can work with most common frameworks, as well as custom systems and engines developed in PHP. I will gladly take part on development of any website, webservice, messenger bot or parser of any complexity. I can also modify or repair your website, service or web application if you have any problem with it, or develop new individual modules, components or integrations for your service or web-site. I have extensive experience in integrating with payment systems, databases and external services through API, as well as developing API and integrations between various services.

Hello, innovators! 👋 I’m Iuri, a Python/FastAPI developer who builds fast, secure, and scalable backends that power high-performing products. From AI integration to backend architecture, I turn complex challenges into smooth, efficient solutions. If you need a developer who delivers results, let’s connect! 🔸 Need a backend that’s fast, secure, and scalable? I’ve got you covered. 🔸 Looking to integrate AI into your product? Let’s make it happen. 🔸 Want to automate time-consuming tasks? I make it effortless. 🔸 Got a special request? There's nothing that I can't do. I specialize in FastAPI, Python, Web Apps and automation, helping businesses cut costs, boost efficiency, and scale smoothly. How I Deliver Results: ⌛ Save Time & Reduce Errors Built an AI-powered email automation SaaS used by 10k+ users, saving 1,000+ hours. Transformed scanned receipts and papers into backend-ready data using Python + OCR + OpenAI LLM - enabling automation in reporting, rewards, and promotions. 🚀 Scale Without Headaches Designed high-performance SaaS backends handling 10k+ users (FastAPI, Docker, Kubernetes). Deployed production-ready APIs that handle millions of requests smoothly. 🧠 Build AI-Enhanced Applications Integrated OpenAI, ElevenLabs, and Google APIs into next-gen applications. Automated complex workflows, including CAPTCHA and real-time AI chatbots. Why Work With Me? ⚙️ 4+ years of hands-on experience building backends, SaaS, APIs, automation tools and AI-driven features 🎯 Results-driven - I focus on saving time, reducing costs, and scaling your product. 🤝 Clear communication & fast execution – You’ll always know what’s happening. Featured Projects: 📧 AI Email SaaS - Personalized AI-generated email campaigns at scale (10k+ users) 🔊 "My Voice" App - Text-to-speech tool for speech-impaired users using AI voice models 🧠 GenesisAI Email Infrastructure - One-click scalable email server builder for marketers 🌐 ChatGPT Response Navigator - Chrome extension to navigate AI chats efficiently 🔍 OCR Receipt Processor - Used Google OCR + OpenAI LLMs to convert receipt and paper images into structured backend data 👪 SOS Lasteküla Platform - Built tools to help families in need access support resources 🧩 Mautic Plugin Development - Open-source contributor Tech Stack: 🛠️ FastAPI • Python • Django • PostgreSQL • MySQL • Docker • Kubernetes 🧠 OpenAI • ElevenLabs • Google Cloud Vision 📱 Flutter • React 🔒 Auth, Email Infrastructure, High-Performance APIs

Hi. My name is Maksim. I am a Backend/Chatbot Developer with 5+ years of experience. Got a Masters Degree in Computer science As for my skills, it is: - Python (5+ years experience) - Aiogram (2 +years experience) - MySql, Postgresql databases(2+ years of experience) - Lunix (3+ years of experience) - AWS services (1+ year) - Git ecosystem skills - Pandas, Numpy and other data analysts tools - Scrapy, selenium and other web scraping tools You can check my projects in my portfolio and on my github page. Feel free to write me and we can have a zoom meeting - to discuss how my skills can be applied to your project

Experienced Web3 blockchain developer (Ethereum/Solidity, Solana/Rust, TON, NFT, DeFi) with strong full stack background (Node.js, React, Angular, Vue.js, .NET, HTML/CSS, SQL/NoSQL). Specialize in developing and integrating smart contracts to create decentralized Web3 applications. Developed real DeFi products such as BullPerks/GamesPad (industry-leading IDO platforms with top ATH ROI), NFT Marketplace, etc. Implemented various functionality such as tokens and NFTs creation, distribution, trading and auctions, staking pools, vesting etc. I do the full cycle of smart contracts development - design, writing, automatic testing, security audit, deployment to blockchain, integration with frontend and backend.

Feedback: 💭"Sergei, has done a terrific job on a difficult project. He's a great programmer." 💭"Always the number one coder we go to first if we need some help." 💭"With ultra precision and extreme intelligence Sergei helped us with some tricky issues." 💭"An exceptional developer, professional in all ways. Attendant to quality and best practices." As a certified PHP specialist, I am reliable, dedicated, and intelligent. I approach tasks with thorough attention to detail. Love to solve complex challenges, the consistent high quality of my deliverables speaks for itself. Past work history and feedback affirm this. Specializing in backend development, APIs integration, and pinpointing and rectifying intricate errors, a significant portion of my expertise comes from a comprehensive cinema automation project developed over 4 years, as well as a sophisticated real estate project spanning 6 years. Furthermore, I am an expert in frontend development, well-acquainted with modern JavaScript and Vue.js. I can work on: - backend and frontend - AI integration, chatbots - speed optimization - API integration - shipment/payment integration - creating websites/modules from scratch - and much much more.... I'm firmly convinced that the foundation of any successful project lies in thorough discussion and planning. My expertise: 🐘 Backend Development: PHP (Pure PHP, Symfony, debugging, testing) ⚡ Backend Development: Node.js (Typescript, Pure node, nest.js, debugging, testing) ✨ Frontend Development: Pure JavaScript, Vue.js, CSS, SCSS 🔌 WordPress (custom logic, plugin development) 📜 Google App Script (Serverless superset of JavaScript) ☁️ Cloud development (AWS, Google Cloud) 📦 Docker (Compose, App isolation, consistency) 🐧 LAMP (Linux, Apache, MySQL, PHP, advanced setup) 🔀 Git (GitHub, Bitbucket) 🏭 CI/CD (Continuous Integration/Deployment) Why me: ✔ tackle complex challenges and offer solutions. ✔ commitment to precision: no detail is overlooked. ✔ consistently deliver clean, intuitive, and effective coding. ✔ clear and efficient communication via chat and video.