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Dmitrii M.
$30/hr
$100 earned
Available now
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You don't need another AI demo that breaks in production. You need someone who tells you upfront: this will work, this won't, here's why. Last quarter I fixed a hallucinating RAG for 1,000+ lawyers (AiExpert) and deployed a FinTech agent processing Visa/Mastercard docs at 95% accuracy (Shift4). ⚡ RECENT ENGINEERING WINS: - 𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐚𝐥 𝐑𝐀𝐆 - 𝐄𝐦𝐬𝐭𝐞𝐞𝐥 (𝐀𝐛𝐮 𝐃𝐡𝐚𝐛𝐢): Built a technical documentation assistant for factory operators. Improved retrieval accuracy from 0.82 to 0.93 (Faithfulness/Recall) using Hybrid Search and custom chunking strategies. - 𝐅𝐢𝐧𝐓𝐞𝐜𝐡 𝐀𝐠𝐞𝐧𝐭 - 𝐒𝐡𝐢𝐟𝐭𝟒 (𝐕𝐢𝐬𝐚/𝐌𝐚𝐬𝐭𝐞𝐫𝐜𝐚𝐫𝐝): Developed a parsing agent for unstructured PDF guides + ML model to predict transaction fees. Replaced manual calculations with 95%+ accuracy. - 𝐋𝐞𝐠𝐚𝐥 𝐓𝐞𝐜𝐡 𝐒𝐚𝐚𝐒 - 𝐀𝐢𝐄𝐱𝐩𝐞𝐫𝐭: Engineered a secure document analysis system for 1,000+ lawyers. Reduced review time by 60% with a scalable microservices architecture. - 𝐑𝐞𝐜𝐨𝐦𝐦𝐞𝐧𝐝𝐞𝐫 𝐒𝐲𝐬𝐭𝐞𝐦 - 𝐂&𝐀: Built a product recommendation engine for millions of monthly active users. Achieved 8% NDCG uplift and 3% conversion increase. - 𝐂𝐨𝐧𝐜𝐢𝐞𝐫𝐠𝐞 𝐀𝐈 𝐀𝐠𝐞𝐧𝐭 - 𝐊𝐢𝐧𝐠𝐬𝐰𝐞𝐥𝐥: Built Telegram & WhatsApp bots for real estate concierge service. Automated lead qualification and property viewing bookings. ⚙️ MY ENGINEERING APPROACH: - 𝐏𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐨𝐧 𝐑𝐀𝐆: No naive "text-splitting". I build GraphRAG & Hybrid Search (Sparse/Dense) systems with Ragas evaluation pipelines to eliminate hallucinations. - 𝐀𝐠𝐞𝐧𝐭𝐢𝐜 𝐖𝐨𝐫𝐤𝐟𝐥𝐨𝐰𝐬: Orchestrating autonomous agents (LangGraph) that can plan, execute tools, and validate outputs. - 𝐓𝐫𝐮𝐞 𝐏𝐫𝐢𝐯𝐚𝐭𝐞 𝐀𝐈: Deploying Open Source LLMs (Llama 3.1/3.2, Qwen 2.5, DeepSeek) on your own infrastructure (On-prem/AWS GPU) using vLLM. Zero data leakage. 🛠 TECHNICAL TOOLKIT: 𝐋𝐋𝐌 𝐅𝐫𝐚𝐦𝐞𝐰𝐨𝐫𝐤𝐬: LangChain, LangGraph, LlamaIndex, DSPy. 𝐎𝐩𝐞𝐧 𝐒𝐨𝐮𝐫𝐜𝐞 𝐌𝐨𝐝𝐞𝐥𝐬: Llama 3.1/3.2, Mistral Large, Qwen 2.5, DeepSeek-Coder. 𝐈𝐧𝐟𝐞𝐫𝐞𝐧𝐜𝐞 & 𝐒𝐞𝐫𝐯𝐢𝐧𝐠: vLLM, Ollama, Hugging Face TGI, Docker. 𝐕𝐞𝐜𝐭𝐨𝐫 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬: Qdrant (Self-hosted), Pinecone, Weaviate. 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 & 𝐂𝐨𝐫𝐞: Python, FastAPI (Async), Pydantic, PostgreSQL. 𝐂𝐨𝐦𝐩𝐮𝐭𝐞𝐫 𝐕𝐢𝐬𝐢𝐨𝐧: YOLO11/v8, OpenCV, PyTorch. Previously: DataArt, EPAM, Grid Dynamics. MSc in AI (ITMO). Ready to build architecture, not just a chatbot? Invite me to your job.
Dmitrii M. has worked .
$35/hr
84% Job Success
$1K+ earned
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I am a Senior Python Backend Developer with 8+ years of experience building scalable, high-performance backend systems and integrating AI/ML capabilities into real-world applications. My technical expertise spans across Python, Django, API development, PostgreSQL, MySQL, Postman, Flask,, Data Analytics, and modern frontend technologies. I specialize in designing, building, and maintaining high-performance back-end services, scalable APIs, and B2B platforms, while ensuring maintainability and code quality. I deliver production-ready systems that are secure, maintainable, and optimized for performance. My primary focus is on backend engineering with FastAPI, Django, and Flask, while I also specialize in AI/ML, data processing, and intelligent automation. 𝗪𝗵𝗮𝘁 𝗜 𝗗𝗲𝗹𝗶𝘃𝗲𝗿: ✔️ Scalable REST/GraphQL APIs & microservices ✔️ Data pipelines & AI/ML-powered systems ✔️ Cloud-native architectures (AWS/GCP/Azure) ✔️ Secure, tested, and future-proof code (CI/CD) ✔️ MVP-to-enterprise scaling with clear communication ⭐ 𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝘆 𝗣𝘆𝘁𝗵𝗼𝗻 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 -Clean, maintainable, production-grade code -Backend-first thinking (performance, security, scalability) -Strong communication & fast delivery -Ability to integrate into existing teams or lead backend work I have experience working across diverse industries, including Fintech & Banking, Healthcare & Medical Systems, E-commerce & Retail, SaaS & Cloud Platforms, Data Analytics & Business Intelligence, Artificial Intelligence & Machine Learning, Logistics & Supply Chain, Travel & Hospitality, and Education & E-learning. 👉 𝐈𝐟 𝐲𝐨𝐮 𝐥𝐨𝐨𝐤𝐢𝐧𝐠 𝐟𝐨𝐫 𝐟𝐮𝐥𝐥 𝐬𝐭𝐚𝐜𝐤 𝐨𝐫 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 ? I am dedicated Full stack as well as Backend developer to develop a user-friendly high-end functionality-based website & web applications. 📅 𝐀𝐕𝐀𝐈𝐋𝐀𝐁𝐋𝐄 𝐓𝐎 𝐓𝐀𝐊𝐄 𝐎𝐍 𝐘𝐎𝐔𝐑 𝐏𝐑𝐎𝐉𝐄𝐂𝐓 𝐓𝐎𝐃𝐀𝐘.
Rusab K. has worked .
Artsem U.
$40/hr
100% Job Success
$200K+ earned
Available now
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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. ✉︎
Artsem U. has worked .
Exore LTD - Top Rated Plus Agency | Full stack development 🏅
Associated with
Exore LTD - Top Rated Plus Agency | Full stack development 🏅
$1M+
earned
Viktar K.
$49.99/hr
$1K+ earned
Available now
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🔍 Looking for one developer who understands the whole system? I bring full-stack clarity - from database to browser - to build products users love and businesses trust. Full Stack Python Developer 7+ years of experience and AI Developer with 6+ years | I've built 10+ applications | crafted 30+ user-friendly interfaces that drive real business results. 👨‍💻 BACK -END Development: Python: Expert in using Python for server-side development. Frameworks: Proficient in Django and Flask for building web applications. Databases: Skilled in SQL, PostgreSQL, MySQL, and MongoDB for efficient data management. Architecture: Experienced in applying MVC patterns for scalable applications. APIs: Capable of integrating external services through REST and GraphQL. 👨‍💻 FRONT-END Development: Web Technologies: Proficient in HTML5, CSS3, and JavaScript for front-end development. Frameworks: Experienced in React.js, Angular, or Vue.js for building interactive user interfaces. Responsive Design: Skilled in creating responsive and cross-browser compatible layouts. 👨‍💻AI TOOLS: OpenAI API, DeepFace, ML/DL frameworks like TensorFlow, Keras, PyTorch, Scikit-learn, pandas, NumPy, LLM frameworks, LangChain, LangGraph, LangSmith, RAG, Mistral, AgenticAI, Transformers, AI Copilot Studio, Cursor, Claude, etc. My team Expertise at a Glance ✅ Mobile App Development: Android, iOS, & Cross-Platform App Development using Java, Kotlin, Swift, Objective C, Flutter, and more. ✅ Website and Full Stack Development: Crafting seamless back-end experiences with .Net, Python Flask, FastAPI, Java, Javascript, React.js, Angular.js, Node.js, MERN, MongoDB, PHP, etc. ✅ Logo & UI/UX Design: Bringing your ideas to life with Adobe XD, Photoshop, Sketch, Figma, etc. ✅ End-to-End Solutions: From logo design, UI/UX development, workflow setup, testing to deployment in app stores, we've got it all covered. 🏆 Notable Achievements: ✅ Delivered systems processing over 10 million requests per day in production ✅ Led python architecture for a fintech app now serving 250k+ active users ✅ Reduced API response times by 70%+ via system-wide optimization ✅ Migrated monolith to microservices, improving deployment frequency by 5x ✅ Maintained 100% job success score with 40+ 5-star client reviews ✅ Saved clients hundreds of developer hours through automation & refactoring Industries We Cover Healthcare, Transport, Retail, Asset Management, Wealth Management, Real Estate, Dating, Rental, Food Delivery, Fintech / Finance and Banking, Cryptocurrency, Entertainment, Hospitality, Non-Profit, Sports and Fitness, Travel and Tourism, Wellness, Medical Dashboard, Marketplace, Advertising, Automotive, Aircraft, Business Innovations, Human Resources, LegalTech, Lifestyle, Marketing, Education, E-learning, Insurance, IoT, E-commerce, Enterprise. 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 and Python Engineer, 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. Talent Good Knowledge, Talented, Experienced, Skilled, Strong Experience, Proven Experience, Agency, Team, Company, Specialist, Proven Track Record, Strong Background, Write Clean Code, Deep Expertise, Bring to Life, Cross-platform, Attention to Detail, Long. AVAILABLE FOR NEW PROJECTS: Daily updates, Quick turnaround, Flexible Availability, Highest-Quality deliverables, Conversion increase, Individual approach to each project! I am out there seeking for new opportunities and projects where we can put our knowledge/experience to great use and bring value to both individuals, startups and well-established companies. Press ❗ INVITE ❗ on my page and elevate your project to the next level of success! 🤝
Itexus LLC 💚
Associated with
Itexus LLC 💚
$1M+
earned
Ravi  T.
$25/hr
100% Job Success
$4K+ earned
Available now
Offers consultations
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🚀 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐀𝐈 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 | 𝟖+ 𝐘𝐞𝐚𝐫𝐬 𝐨𝐟 𝐄𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 | 𝟏𝟕+ 𝐒𝐮𝐜𝐜𝐞𝐬𝐬𝐟𝐮𝐥 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐞𝐝 Looking for someone who can take ownership of your project and deliver quality software without constant supervision? I help startups and businesses build web applications, SaaS products, internal tools, and AI-powered software using React.js, Next.js, Python, FastAPI, PostgreSQL, and modern cloud technologies. I also use AI tools to speed up development where they make sense, but I don't rely on them to write software. My strength is understanding how AI models work and building applications around them using RAG, AI Agents, MCP, function calling, structured outputs, semantic search, and vector databases. The goal is always the same, build software that's reliable, maintainable, and solves real business problems. I enjoy working on products from the ground up, improving existing applications, and helping teams make good technical decisions that will still hold up as the product grows. 𝐑𝐞𝐜𝐞𝐧𝐭 𝐒𝐮𝐜𝐜𝐞𝐬𝐬 𝐒𝐭𝐨𝐫𝐲 One of my recent projects was Infinite Possibilities AI, an enterprise AI platform that helps organizations search and interact with thousands of business documents. One of the biggest challenges was improving the quality of AI responses while reducing hallucinations across a large knowledge base. I designed and built a Retrieval-Augmented Generation (RAG) pipeline with semantic search, vector databases, and intelligent document processing. 𝐑𝐞𝐬𝐮𝐥𝐭𝐬 Reduced document retrieval time by 70%+ Improved AI response quality Helped teams find information much faster Built an architecture that can easily scale as more documents are added This project brought together my experience in full-stack development, backend architecture, cloud infrastructure, and AI engineering. 𝐖𝐡𝐚𝐭 𝐈 𝐂𝐚𝐧 𝐇𝐞𝐥𝐩 𝐘𝐨𝐮 𝐁𝐮𝐢𝐥𝐝 ✔ SaaS Platforms ✔ React.js & Next.js Applications ✔ Startup MVPs ✔ AI-Powered Applications ✔ FastAPI & Python Backends ✔ REST APIs ✔ Admin Dashboards ✔ Internal Business Tools ✔ Authentication & User Management ✔ Third-Party API Integrations ✔ Database Design & Performance Optimization ✔ Cloud Deployment & CI/CD 𝐂𝐨𝐫𝐞 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 React.js • Next.js • TypeScript • JavaScript • Tailwind CSS • Redux • HTML • CSS 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 Python • FastAPI • Django • Node.js • Express.js 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 PostgreSQL • MongoDB • MySQL • Redis 𝐂𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬 AWS • Docker • Vercel • GitHub Actions • CI/CD 𝐀𝐈 & 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 OpenAI • Claude • Gemini • LangChain • LangGraph • AI Agents • MCP • Prompt Engineering • Function Calling • Structured Outputs • RAG • Vector Databases • Semantic Search 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞 ✅ I care about writing clean code that's easy to maintain. ✅ I communicate clearly and keep clients updated throughout the project. ✅ I think beyond the task and look for practical solutions that make the product better. ✅ I can take ownership of the entire project, from planning and development to deployment. Whether you're building an MVP, adding new features, improving an existing application, or integrating AI into your product, I'd be happy to help. If that sounds like what you're looking for, feel free to send me a message. I'd love to hear more about your project.
Ravi T. has worked .
Konstantin S.
$30/hr
100% Job Success
Available now
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Python 3 · Django/REST · Flask · FastAPI · AsyncIO · PostgreSQL · CloudFlare · AWS Lambda · API Gateway · SQS · DynamoDB · S3 · Serverless Framework · Selenium · Playwright · BeautifulSoup4 · Custom ETL · Real-time Analytics A cloud-scaling wizard and backend specialist who builds scalable, secure, and maintainable cloud-native systems. With over 5 years of experience, I translate complex requirements into high-performance services - delivered on time and within budget. 🔧 Technical Expertise - Languages & Frameworks: Python 3 · Django/REST · Flask · FastAPI · AsyncIO - Cloud & Serverless: Google Cloud · AWS EC2 · AWS Lambda · API Gateway · AWS SQS · DynamoDB · S3 Bucket · Serverless Framework · AWS CloudFormation · CodeDeploy · AWS EventBridge · AWS SES - Automation & Data: Selenium · Playwright · BeautifulSoup4 · Custom ETL · Real-time Analytics · ScrapFly · ScrapingBee - Databases & Performance: PostgreSQL · MySQL · Redis · SQLAlchemy · Query Optimization · AWS RDS - DevOps & Best Practices: Docker · Bash · Git/GitHub Actions · Jenkins · Terraform/CloudFormation · TDD · Code Reviews 🚀 Key Achievements 1. Ultra-High Throughput Designed 15+ AWS Lambda microservices to process 500K+ concurrent requests - cut error rates by 40% and latency by 60%. 2. End-to-End Automation Built data-scraping pipelines across 100+ websites, slashing manual effort by 95% and enabling on-demand dashboards. 3. Serverless Analytics Engine Developed a cost-evaluation platform handling 10K+ scenarios in real time - saving clients over $500K in project spend. 4. Resilient Messaging Bots Launched Telegram bots with 99.9% uptime, delivering critical COVID-19 updates to 50K+ users and ensuring reliable outreach. 🤝 Collaboration & Delivery - Agile Mindset: Sprint planning, retrospectives, user-story grooming - Transparent Communication: Frequent updates, clear estimates, timely feedback loops - Quality First: Unit tests, CI/CD pipelines, thorough documentation 💬 Ready to Get Started? If you need a battle-tested engineer to architect, build, or optimize your Python-powered AWS systems, hit “Invite to Job” or send me a message - I’m eager to dive into your next challenge!
Konstantin S. has worked .
Bohdan K.
$35/hr
100% Job Success
$10K+ earned
Available now
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Engineering teams hire me when they need one person who can build the Python API and deploy it to AWS without handing off to a separate DevOps engineer. 4.5 years building Healthcare AI backends with Django and FastAPI, Kubernetes deployments on AWS, 100% JSS, Top Rated Plus. What I have built: Clinical Trial Management System (1 year 3 months): backend for a Healthcare CRM managing patient enrollment, randomization algorithms assigning patients to placebo or medication groups, role-based access control for sensitive medical data, and REST APIs for CRM integration. Full DevOps ownership: Kubernetes with Helm, Prometheus and Grafana monitoring, GitHub CI/CD pipelines. Team of 9-12. Stack: Python, Django, DRF, MySQL, AWS, Docker, Kubernetes, Helm, Prometheus, Grafana. AI Medical Form Completion Service (1 year 8 months): NLP backend that automatically fills medical intake forms by extracting structured answers from patient records using LangGraph. Microservice architecture, document processing across PDF and DOCX formats, AI prompt engineering for accurate field extraction. Team of 2-3. Stack: Python, Django, LangGraph, PostgreSQL, AWS, Jenkins. Government Employment Platform (1 year 6 months): national employment platform with Elasticsearch-powered search, multi-language support, GraphQL APIs, customized Django admin panels, and AWS infrastructure. Team of 6-7. Stack: Python, Django, DRF, GraphQL, PostgreSQL, Elasticsearch, Celery, Docker, AWS. On Upwork: FastAPI backend for API integrations and data processing, 37 hours, 5 stars. Unit tests and code coverage for ArXiv MCP, 5 stars. How I work: Architecture documentation before code. CI/CD pipelines from day one: linting, tests, Docker builds, artifact storage, automated deployment. Unit tests before any feature ships. Infrastructure is code, not manual configuration. I operate with the full backing of Meduzzen's senior engineering team. Every commit I ship is peer-reviewed by our internal technical leads before deployment. If I am unavailable, your sprints do not stop: a fully briefed Meduzzen engineer provides immediate coverage. One point of contact, zero single-point-of-failure risk. Core stack: Python, Django, FastAPI, PostgreSQL, MySQL, Redis, Docker, Kubernetes, Helm, AWS (EC2, ECS, S3, ECR, CloudWatch), GitHub Actions, Prometheus, Grafana, Celery, LangGraph, Elasticsearch. If you need a Python backend that is properly deployed and monitored from day one, send me the architecture overview. I will tell you how I would structure it.
Bohdan K. has worked .
Meduzzen
Associated with
Meduzzen
$2M+
earned
Mayur D.
$15/hr
100% Job Success
$4K+ earned
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I’m a Python backend developer with 6+ years of experience building robust, scalable systems. I specialize in Django and FastAPI to develop high-performance RESTful APIs tailored to client needs. My projects emphasize code quality, maintainability, and scalability. I use asynchronous programming and optimize PostgreSQL/MySQL queries for fast performance under load. I follow best practices for security and CI/CD deployment, ensuring your applications are production-ready and reliable. 💡 Core Skills & Expertise ✦ Backend Development: - Python, Django, Django REST Framework (DRF), FastAPI - PostgreSQL, MySQL, Celery, Redis - Microservices ✦ Frontend Development - React.js, Tailwind CSS ✦ Web Scraping & Automation: - Scrapy, BeautifulSoup, Selenium, Playwright - Anti-bot evasion (rotating proxies, headless browsers, CAPTCHA solving) ✦ Deployment & DevOps: - Docker, Kubernetes - AWS (EC2, S3), DigitalOcean - CI/CD: GitHub Actions, Jenkins ✦ AI & Chatbot Integration: - OpenAI GPT, GPT-4, Anthropic, LLaMA - LangChain, RAG pipelines, NLP & prompt engineering ✦ Solutions & Impact I focus on solving real business challenges with smart, scalable solutions. ✅ Developed the backend for a real-time stock analytics platform using Django, optimized for high concurrency with Celery and Redis. ✅ Built web scrapers capable of bypassing advanced anti-bot systems. ✅ Integrated AI models (e.g., GPT, LLaMA) into web apps for intelligent automation and chatbot experiences. ✅ Delivered API-driven platforms with payment systems, dashboards, and AI-powered content generation. 🤝 Communication & Collaboration I value transparency, clarity, and long-term client relationships. I keep communication clear, timelines realistic, and solutions tailored to your business goals. If you're looking for a reliable backend expert who can also handle complex scraping, AI integrations, and scalable deployments—let's connect. I'm committed to delivering results that move your project forward. Kind Regards, Mayur Dhameliya
Mayur D. has worked .
Sandeep T.
$29/hr
100% Job Success
$4K+ earned
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I’m Sandeep, a Senior Backend & AI Engineer with 5+ years of experience building AI-enabled SaaS platforms, high-performance APIs, LLM/RAG workflows, and production-ready microservices. I specialize in Python, FastAPI, Django, REST APIs, microservices, PostgreSQL, Redis, MongoDB, vector databases, LangChain, OpenAI/LLM integrations, Docker, Kubernetes, AWS, and GCP. My focus is to convert ideas and prototypes into secure, scalable, and maintainable production systems. At Coretus, I also work with reusable Microservices Accelerators for common backend foundations like authentication, RBAC, payments, notifications, API structure, and deployment patterns. This helps reduce repetitive setup work and allows more focus on your core business logic, AI workflows, and product scalability. What I can help you with : Backend Architecture & API Development  I build secure and scalable backend systems using Python, FastAPI, Django, REST APIs, OpenAPI/Swagger, PostgreSQL, MongoDB, Redis, and clean microservice patterns. AI, LLM & RAG Development  I develop AI-powered backend systems, RAG pipelines, LLM API integrations, LangChain workflows, embeddings, vector search, AI agents, and automation layers. SaaS & Multi-Tenant Platforms  I design backend systems for SaaS products with role-based access, tenant isolation, admin workflows, subscription/payment logic, dashboards, and scalable database structures. Async Processing & Data Workflows I build queue-based systems using Celery, Kafka, RabbitMQ, Redis, background jobs, event-driven workflows, and high-volume data processing pipelines. Cloud, DevOps & Production Deployment I dockerize applications, set up CI/CD pipelines, deploy on AWS, GCP, Kubernetes, AWS Lambda, or GCP Cloud Run, and support production debugging and performance optimization. I have worked on backend and AI systems for: AI recruitment SaaS with resume parsing, candidate matching, LLM integration, and vector search AI nutrition and meal planner app with food recognition, GPT APIs, Redis caching, and personalized recommendations Multi-tenant scheduling SaaS with calendar sync, timezone handling, payment workflows, and queue-based booking logic Algorithmic trading backend with Kafka, Redis, WebSockets, broker APIs, and real-time analytics Real-time communication app with WebSocket/WebRTC signaling, Redis sync, and low-bandwidth messaging workflows Job platform with REST APIs, Elasticsearch search, application workflows, and third-party integrations Why clients work with me Strong Python, FastAPI, Django, and backend architecture experience Practical experience with AI, LLM, RAG, vector databases, and automation workflows Scalable SaaS and microservices development approach Clean API structure with authentication, RBAC, documentation, and maintainable code Production-focused mindset from architecture to deployment Clear communication and reliable delivery Whether you need a backend from scratch, an AI/RAG feature, a scalable SaaS architecture, API optimization, automation workflows, or cloud deployment support, I can help you build a reliable technical foundation. Let’s connect and discuss how we can turn your backend idea into a secure, scalable, and production-ready system. Sandeep Thesiya Senior Backend & AI Engineer | Python | FastAPI | SaaS | RAG | Microservices
Coretus : Strategic Tech Partner for Enterprise AI & Scalable SaaS
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Coretus : Strategic Tech Partner for Enterprise AI & Scalable SaaS
$100K+
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Isaiah F.
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$10K+ earned
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AI Automation Engineer | Python, FastAPI & AI Agents I help startups and businesses build AI-powered applications, automate complex workflows, and scale backend systems. With 5+ years of experience, I specialize in Python development, AI agent systems, workflow automation, API integrations, and scalable web applications. My focus is turning manual, time-consuming processes into reliable automated systems that save time, reduce operational costs, and improve business efficiency. My expertise includes: • AI Agents & LLM Applications (OpenAI, Claude, LangChain, Agentic Systems) • Workflow Automation (n8n, Zapier, Make, Zoho Flow) • Backend Development (Python, FastAPI, Django, Flask) • REST & GraphQL APIs • Web Automation & Data Extraction (Selenium, BeautifulSoup) • Asynchronous Processing (Celery, Redis) • Cloud & DevOps (Docker, AWS, DigitalOcean, GitHub Actions) • PostgreSQL, MySQL, MongoDB Recent work includes: • Built an AI-driven marketing automation platform that automated keyword research, content generation, publishing, and advertising workflows using autonomous AI agents. • Developed expert-client matching and booking automation systems that automated qualification, communication, scheduling, and follow-up processes across multiple channels. • Created AI-powered customer support platforms with intelligent response generation, ticket management, and workflow automation. • Designed and implemented automation pipelines connecting CRMs, payment systems, databases, and third-party business tools using Zapier, Make, and custom APIs. Clients work with me because I deliver solutions that are: ✅ Scalable and production-ready ✅ Well-documented and maintainable ✅ Focused on measurable business outcomes ✅ Built with clear communication and reliable delivery Whether you need an AI agent, workflow automation system, SaaS backend, API integration, or a complete AI-powered application, I can help turn your idea into a reliable production system.