🏆 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. ✉︎

Python Developer with 6+ years of experience building scalable backend systems, SaaS platforms, automation workflows, and AI-powered applications using python Django and modern Python development practices. ⬩ Why clients work with me: - 6+ years of Python development experience - Strong scalable backend architecture expertise - SaaS, marketplace and MVP platform experience - Clear communication and structured collaboration - Accountable for outcomes, not just code delivery - Production-ready AI + backend integrations - Long-term technical partnership mindset - Detail-oriented and committed to quality I help startups and growing businesses transform complex backend logic into fast, secure, and maintainable systems tailored for real-world products like marketplaces, CRMs, client portals, job boards, analytics platforms, and AI-driven tools. As a Fullstack Python developer, I contributed to marketplace platforms, AI-powered semantic search systems, real estate and EV comparison MVPs, loan management applications, and B2B SaaS products, focusing on clean architecture and long-term scalability. ⬩ Python backend expertise I specialize in Python Django and FastAPI backend development with PostgreSQL, Redis, and Celery, delivering production-grade solutions as a Python developer focused on scalable python development. From REST APIs and OAuth authentication flows to background workers and multi-user permission systems, I design robust backend architectures that support real growth. Whether building a B2B marketplace, SaaS MVP, or internal business platform, I approach development in a collaborative and solution-oriented way, focusing on clarity, scalability, and maintainability. ⬩ Automation and data workflows Need a system to parse thousands of PDFs, scrape e-commerce products, or monitor websites in real time? As a Python developer, I build custom scraping scripts using BeautifulSoup, Scrapy, and Selenium, paired with automation logic and APIs to feed your business engine. ⬩ AI-powered systems (LangChain + OpenAI) As a backend-focused LLM developer, I build intelligent assistants and AI-powered features using LangChain, FAISS, OpenAI, and RAG pipelines. I worked on AI-powered product catalog processing and semantic search systems, integrating LLM workflows into structured backend APIs with production stability in mind. ⬩ Architecture and deployment From scalable SaaS platforms to marketplace infrastructure, I design systems using Docker, CI/CD, and cloud deployments (AWS, Railway, Render). My work follows backend best practices, including clean architecture, modular design, security-first implementation, database optimization, and performance tuning. I prioritize reliability, clarity, and professional execution throughout every phase of a project. ⬩ What I can do for you: - Custom Django/FastAPI backends with clean architecture - REST API design and 3rd-party API integrations (Stripe, OpenAI, Twilio) - Automated scrapers, parsers, and ETL pipelines - AI and LLM integration (LangChain, Pinecone, OpenAI API, Vector DBs) - PostgreSQL schema design and query optimization - Backend architecture for CRMs, marketplaces, analytics platforms - Infrastructure setup with Docker, GitHub Actions, AWS, Railway - Post-delivery support and long-term collaboration ⬩ Technologies I work with: Python, Django, FastAPI, Flask, PostgreSQL, Redis, Docker, LLMs, LangChain, OpenAI, API, Web Scraping, BeautifulSoup, Celery, PDF/DOCX Parsing, Vector Search, CI/CD, AWS, ETL Pipelines, RAG Let’s build something that makes decisions, not noise. ⚙️ A Python developer building backend systems in production environments. A Python developer supporting SaaS platforms, automation tools, and customer-facing web applications. As a Python developer, I focus on API design, clean architecture, and scalable implementation. A Python developer delivering structured backend solutions with Django and PostgreSQL. A Python developer building FastAPI services, automation scripts, and data workflows. A Python developer web scraping specialist creating reliable data extraction systems and scalable pipelines. This Python developer profile supports long-term and multi-phase engagements. A Python developer suited for ongoing backend maintenance and system evolution. Teams work with me to maintain stability and reduce technical risk. If you’re looking for a Python developer to build or scale your backend, send me a message or book a call. ✉︎

🏆 Python Developer with 19,000+ hours delivering solutions | 98% Job Success Score | 24+ projects completed on time 💬 Client Reviews Python developer: ⭐⭐⭐⭐⭐ "Sergey did an excellent job on this project. The results were exactly as I needed them. He understood the requirements and how to implement the project very well. I have since hired him again for further work." ⭐⭐⭐⭐⭐ "This was a very complex problem. Sergy understood the project very well and did an excellent job developing a solution that we use daily now." 🎯 What I Bring as a Python Developer: • 9+ years of experience building scalable backends and microservices with Python, FastAPI, Django, and Python Full Stack Developer Flask • Expertise in deploying production-ready applications on AWS, Heroku, Fly.io, DigitalOcean, and VPS with fully automated CI/CD pipelines • Proficient in AI integrations, data pipelines, predictive analytics, and designing microservices for complex systems • Proven track record in leading teams, Python web development, and building solutions from the ground up 🐍 Python Developer Tech Stack: • Backend Frameworks & Languages: Python, FastAPI, Django, Flask, Django Rest Framework, Celery, GraphQL, REST APIs, Microservices Architecture • Databases: PostgreSQL, PostGIS, MySQL, MongoDB, MS SQL, Redis, SQLite, Amazon Aurora • Cloud & DevOps: Docker, AWS, Azure, Heroku, Fly.io, DigitalOcean, VPS, CI/CD pipelines, GitHub Actions, GitLab CI, Ansible, Nginx, python aws • Frontend Frameworks & Full-Stack: React, JavaScript, TypeScript, jQuery, HTML, CSS, Bootstrap, Highcharts • AI & Data: Machine Learning, NLP, Sentiment Analysis, Predictive Analytics, Data Pipelines, PyTest for TDD, OCR, Optical Character Recognition, Microsoft Face recognition, Azure AI Face service, machine learning python and python data science • Tools & Platforms: Keycloak, OpenShift, Kong Gateway, Apache Mesos, Apache Aurora, Postman, Figma, Google Apigee API, OCR (Optical Character Recognition) with world-class Google Cloud AI 🏗️ Projects I’ve Led as a Python Developer aws: • Healthcare: Built family appointment systems, DNA test purchasing platforms, and patient portals integrated with insurers • Healthcare: Developed and scaled high-throughput RESTful APIs in python web development using Flask and Python microservices • Agritech: Created a grain price dashboard with real-time market data for traders • Telecom: Developed a cell tower mapping platform as a Python full stack developer with geocoding functionality • Product Companies: Engineered AI-powered tools for code conversion as a python django • Retail & Healthcare: Delivered an AI-driven translation service for a medical corporation • Retail: Developed AI-powered tools for sentiment analysis of reports and articles for a manufacturer with python web scraping • Fintech: Built a secure web wallet with multi-currency exchange, blockchain integration, as python code review • Automotive: Designed predictive models for sales forecasting and python ai developer 🏢 Industries for the Python developer: I have successfully delivered projects across Healthcare, Agritech, Telecom, Retail, Fintech, Automotive, and B2B domains 🔧 Roles I Commonly Take On: • AI-Focused Python Developer creating workflow automation using OpenAI and AI integrations • Python Full Stack Developer flask helping high-growth startups scale reliably and efficiently • Python AI developer specializing in building robust, scalable APIs with Python • DevOps Python developer AWS implementing CI/CD pipelines for Django, Flask, and FastAPI applications • Python Django delivering end-to-end solutions in Django and React • Python Full Stack Developer Flask • Machine Learning Python • Python web scraping 📊 Key Achievements: • Developed automation scripts that saved clients 100+ hours/month in manual work • Engineered systems supporting over 30,000 daily active users with zero downtime at launch • Orchestrated 4,000+ concurrent translation tasks • Achieved over 83% unit test coverage on complex integrations • Migrated legacy systems with 100% data integrity preserved • Integrated 35+ third-party APIs seamlessly into production systems • Automated broker commission calculations, reducing processing time by 70% • Passed all security audits with 100% compliance • Optimized high-load database queries, cutting response times by 50–70% 🤝 I’m Open To: • Rapid MVP development to validate business ideas and go to market faster • API design development • Python full stack developer roles and React frontend • AI/ML solutions for automation, analytics, and workflow efficiency • Legacy system modernization pyton developer to modern tech stacks You can find me as a python full stack developer or web developer or a php developer or a python web scraping developer 🚀 Time to move forward? Let’s connect to talk through: • Where your project stands today • What success looks like for you • How can I help you get there, as your Python developer partner

I am AVAILABLE NOW and 24/7 ✅ 10+ year experience. 🚨 I don't use "chat gpt" to write code. I'm an old developer who thinks logically and uses my own head. After me, there's no need to rewrite the code to make it work. Hi) I have been involved in commercial python development 5 years+. I add various services: # Scraping different web-pages # Automation scripts # development of any complexity on a python I love my job! I like to benefit people :)

💡 Core Expertise 🧠 AI & Automation: OpenAI, LangChain, NLP, Chatbot Integrations 🌐 Web Frameworks: Django, Django REST Framework, FastAPI, Flask 🧩 API Development: RESTful APIs, Authentication, 3rd-Party Integrations 🔍 Web Scraping: Scrapy, BeautifulSoup, Selenium ☁️ Deployment & Cloud: AWS, Heroku, PythonAnywhere, VPS setups 💾 Databases: PostgreSQL, MySQL, SQLite, ORM, Sql Alchemy, Pymongo 🎨 Frontend: HTML, TailwindCSS, Bootstrap, jQuery, React Native Django, Python Developer, Flask, Ai, Web Scraping, FastApi, Automation I’m a Python Django Developer with 6+ years of experience building high-performance web applications, AI integrations, and automation tools. I specialize in developing scalable backend systems, custom APIs, and AI-powered solutions for startups and enterprises. 🧠 What I Deliver ✔️ Clean, maintainable, and production-ready code ✔️ Fully documented APIs and deployments ✔️ On-time delivery with transparent communication ✔️ AI-powered automation and data extraction pipelines 💬 Let’s Collaborate If you’re looking for a reliable Django or AI developer who can deliver fast, scalable, and smart solutions — let’s talk!

💼 Python Developer | Python Django | Python Web Scraping | Python Full Stack Developer | Python AI | Python Automation 🏆 TOP RATED PLUS | 💰 $5M+ Client Revenue | 💼 111+ Projects Delivered | ✅ 11,000+ Upwork Hours 💡 Clients Achieved: 🚀 Raised $4.9M+ / $9.4M+ / $6M+ after product development 📈 Scaled platforms to millions of users & billions of operations ⚡ Reduced system load & response time with optimized Python architectures 💰 Automated payments, workflows, and analytics → higher ROI & efficiency 🏥 Built secure, compliant systems (HIPAA, GDPR) used by global organizations I am a Python Developer, Python Full Stack Developer, Python AI Developer, and Python AI Engineer with 10+ years of experience building scalable web platforms, SaaS products, AI systems, and high-performance backend architectures. As a Python Developer, I specialize in designing clean architecture, scalable systems, performance optimization, and production-ready solutions that support real business growth. I work as a Python Full Stack Developer (Python + React / Next.js), combining powerful backend engineering with modern frontend development to deliver complete end-to-end applications. My expertise includes Python Django development, Flask development, and FastAPI development, building robust APIs, microservices, and distributed systems. I am also a Python Automation Engineer and Python Web Scraping Specialist, building intelligent automation systems, data extraction pipelines, and large-scale Python web scraping solutions for business intelligence, analytics, and AI-driven data processing. I design reliable scraping architectures that handle complex, high-volume data at scale. As a Python AI Developer, I build AI-powered applications, NLP systems, automation workflows, and data-driven intelligent platforms integrated with modern Python frameworks and cloud infrastructure. ⚡ Core Expertise as a Python Developer Python Full Stack Development (Python + React / Next.js) Python Django Developer, Flask Developer, FastAPI Developer Python AI Development & Machine Learning Integration Python Automation Engineering for business workflows Python Web Scraping & Data Extraction Systems Scalable backend systems, APIs, and microservices Cloud & DevOps (AWS, Docker, CI/CD pipelines) High-performance, production-grade Python systems 🚀 Selected Projects The Skills ($4.9M raised) 🎓 – Built and scaled an e-learning platform with payments, subscriptions, and mobile apps. As a Python Developer, helped launch a product used by thousands of users worldwide. Veeqo (acquired by Amazon) 📦 – Developed retail infrastructure processing £1B+ in orders. Optimized backend performance, integrated Stripe, and reduced server load using AWS Lambda as a Python Developer. Creyos (75K+ users, healthcare) 🏥 – Built a HIPAA-compliant cognitive assessment platform used by global research institutions. As a Python Developer, worked on secure data systems, scaling, and performance. CityFALCON ($6M raised) 📊 – Created a real-time NLP-powered financial news platform processing millions of articles daily. Designed scalable backend architecture as a Python Developer. ⚡ What I Deliver as a Python Developer Clean, scalable Python AI systems and backend architectures High-performance Python Django / Flask / FastAPI applications Python Full Stack Development (React / Next.js integration) Python Automation & Python Web Scraping solutions AI-powered Python applications and intelligent workflows Secure, compliant systems (GDPR, HIPAA-ready architectures) End-to-end product delivery from idea to production Client Testimonials ⭐⭐⭐⭐⭐ “Very professional! Pleasure to work with. Will definitely use again.” ⭐⭐⭐⭐⭐ “Super reliable, fast, and with clean, well-structured code. Communication was smooth and always on time.” ⭐⭐⭐⭐⭐ “Very satisfied with the work.” 💼 Why Clients Work With Me 10+ years of proven experience as a Python Developer Strong expertise in Python Full Stack, Python AI, and Python Web Scraping Ability to scale systems from MVP to enterprise-level platforms Deep understanding of backend architecture and system design Reliable communication and predictable delivery 🚀 Let’s talk about your project - I am available as your Python Developer, Python Full Stack Developer AI React, Python AI Developer, Python Automation Engineer, Python Django Developer, and Python Web Scraping Specialist.

As a Data Science professional, I specialize in statistical analysis, predictive modeling, and data-driven decision-making. My expertise includes managing large datasets, cleaning and transforming data, building predictive models, and refining model performance to improve accuracy. I am experienced in using evaluation metrics such as RMSE, MAE, and other performance indicators to assess model reliability and support better business decisions. I also design clear, actionable dashboards using tools such as Power BI and Google Looker Studio. My focus is on turning complex datasets into easy-to-understand visual stories that help users monitor performance, identify trends, and make informed decisions. In addition to my data science background, I have hands-on experience in Python development and web application development. I can build and customize web-based tools, dashboards, forms, admin panels, file upload systems, and database-connected workflows. I am comfortable working with both frontend and backend technologies, including HTML5, CSS3, JavaScript, Python, Flask/FastAPI concepts, SQL, MySQL, MongoDB, Pandas, Scikit-learn, and RStudio. My web development experience includes creating user-friendly interfaces, improving page layouts, handling form-based workflows, processing CSV/Excel/XML data, connecting frontend actions with backend logic, and supporting database-driven applications. I am also comfortable working within existing client platforms or app-builder environments, where the goal is to add features, improve workflows, fix issues, and make the system easier for real users to use. Overall, I offer a versatile combination of data science, dashboard design, Python programming, and web development skills. My goal is to help clients turn raw data, manual workflows, or business ideas into practical, clean, and easy-to-use digital solutions.

I'm a senior Python developer with over 10 years of experience in building scalable backend systems and data automation tools. Tech stack: Python (+aiohttp), Node.js, FastAPI, Celery, SQL, noSQL, Docker, AWS, OpenAI/Gemini API I started coding at a young age, starting with Atari Basic, and evolved with the tech landscape - from PHP and Delphi to Python and Node.js. Since 2012, I’ve been delivering freelance development work through Upwork with a proven 100% Job Success rate and Top Rated status. What I Do: - Backend systems using Python, Flask/FastAPI - API development & integration (REST, GraphQL) - Automation tools for workflows, scraping, or data processing - PostgreSQL, MongoDB, Neo4j – optimized and secure - DevOps practices: Docker, Git, AWS basics What You Get: - Delivery within the agreed timeline, with regular progress updates. - Solutions designed to match current requirements and remain adaptable as needs change. - Clear documentation to support future maintenance or team onboarding. - A collaborative approach to ensure the final product aligns with project goals. Based in São Paulo, fluent in English and Russian. Available up to 25–30 hours/week (can scale for the right project).

🎁 A 100% refund if I set the wrong expectation and can’t deliver. I’m a seasoned web developer with over 5+ years of experience designing and building robust, scalable, and innovative applications for startups, SMEs, and established enterprises. My expertise spans both back-end and front-end development, enabling me to craft seamless, end-to-end solutions tailored to your unique business needs. I take pride in delivering high-performance, user-friendly applications that not only meet but exceed expectations. By combining technical excellence with a deep understanding of your goals, I ensure every project is a step toward success. My Technical Skillset Backend: Python, Django, Django Rest Framework Frontend: React.js, Bootstrap Scraping & Automation: BeautifulSoup, Selenium Database: PostgreSQL, MySQL, SQLite DevOps: Docker, Heroku, Bash/Shell Scripting Cloud Technologies: AWS, Google Cloud, DigitalOcean Version Control: Git, GitHub, GitLab, Bitbucket Whether you need a robust RESTful API, a custom management system, or a modern web application, I deliver secure, efficient, and scalable solutions tailored to your needs. With expertise in Django, React.js, and cloud technologies, I ensure your projects are future-ready and impactful. Let’s bring your ideas to life! Feel free to reach out—I’m excited to discuss your project and deliver exceptional results.

For the last 5 years, I have been providing the following services: ✅ Web App Backend development ✅ API development and integration ✅ Data Science/Machine Learning ✅ POC and MVP development ✅ Web automation and Scraping ✅ Scripting and Automation ✅ Bot development ✅ Deployement Working worldwide, I help customers from various business domains through coding, building a dev team, and filling expertise plus technological gaps. Here are the main industries: 🔸 Fintech 🔸 AI and machine learning 🔸 Lead Generation and campaigning 🔸 Document Processing My main tech stack: ☑️ Python ☑️ Frameworks/Modules: TensorFlow, PyTorch, HuggingFace, Keras, Sklearn, Scipy, Seaborn, matplotlib, pandas, numpy ☑️ Flask / FastAPI / Django for Web/ API Development ☑️ WebSocket: Real-time application development with Django Channels, FastAPI + WebSocket, Flask-Socketio, and Socket.IO integrations ☑️ Data Management: PostgreSQL, MySQL, MongoDB ☑️ Task Queues: Celery ☑️ Containerization: Docker ☑️ In-memory Data Store: Redis ☑️ Cloud Platforms: AWS, GCP ☑️ Frontend: HTML/CSS/JS + Reactjs, Nextjs Get in touch, invite me to your project, and let’s start cooperating!