Senior Python Backend Developer | FastAPI, Django, Flask, Frappe, ERPNext, React, vibe coding, | AI | LLM Integration (LangChain, LangGraph, LangFuse, LiteLLM, OpenAI, Claude, RAG, AI Agents) 7+ Years Building Production Ready Systems & Leading High-Performing Development Teams. As a Senior Software Engineer with 6+ years of hands-on experience, I specialize in delivering scalable, production-ready solutions using Python, FastAPI, Django, Flask, and React. Core Expertise Backend Development: Python (Expert level with 6+ years) Microservices Architecture Web Frameworks: FastAPI, Django, Flask, Frappe Payment Gateways: Stripe, Paypal, Razorpay Distributed Systems: Celery, Redis, RabbitMQ, Microservices, Web sockets, webhooks Databases&Search: PostgreSQL, MySQL, MSSQL, MongoDB, Elasticsearch, DynamoDB Testing & Quality: TDD, Pytest Version Control & PM: Git, GitHub, GitLab, Bitbucket, Jira, Notion, Trello, Clickup Migrations: Alembic, Django Migrations APIs: REST, GraphQL, Third-party API Integrations 3rd party integrations: Google SSO, Azure AD, Microsoft SSO, Stripe, PayPal, Microsoft Teams, Zoom, Slack, LinkedIn, Indeed, Unifonic, Twillio, Whatsapp, Sendgrid, SMTP email server, MS Dynamics 365, Oracle fusion, SAML SSO, OpenAI APIs, Active Directory, Keycloak ERP: ERPNext Frontend Development: React.js (with 2+ years of experience) HTML / CSS / JS / Jquery / Tailwind / Bootstrap / Jinja Templates / Django Templates AI/Machine Learning Integration: Production AI Applications - Chatbots, RAG pipelines, AI agents OpenAI API Integration - GPT models, embeddings, fine-tuning LangChain / LangGraph / Langfuse / LiteLLM - Complex AI workflow orchestration Vector Databases - Qdrant, Pinecone, pgvector for semantic search Prompt Engineering - Optimized AI model interactions Cloud & DevOps: AWS, Google Cloud Platform (GCP) - Cloud infrastructure and deployment Docker, CI/CD Pipelines - Automated testing and deployment Redis, Celery, RabbitMQ - Distributed task processing and caching PostgreSQL, MySQL, MongoDB - Database design and optimization Why Choose Me? Team Leadership - Successfully led Python development teams Production Experience - Deployed applications serving thousands of users AI Integration Specialist - Cutting-edge AI features in real-world applications Quality Focus - TDD approach with comprehensive testing Fast Delivery - Agile methodology with on-time project completion 24/7 Communication - Based in Lahore, Pakistan (flexible with global time zones) Services I Offer Custom Python Web Applications (Django, FastAPI, Flask, Frappe) Custom Frontend (React JS, Django templates, Jinja templates) AI Chatbot Development with OpenAI integration RAG System Implementation for document processing API Development & Integration (REST/GraphQL) Database Design & Optimization Cloud Deployment & DevOps Team Leadership & Code Review Legacy System Modernization Vibe Coding Optimization / Fixing Third party integrations Keywords: Python, Python Developer, FastAPI, FastAPI Developer, Django, Django Developer, Flask, Flask Developer, AI Integration, OpenAI API, LangChain, LangGraph, LangFuse, LiteLLM, Team Lead, Backend Developer, Frappe, ERPNext, RESTful API, Microservices, AWS, Machine Learning, Chatbot Development, Database Optimization, Redis, Celery, Production Applications, webhooks, websockets, chat applications, real time communication, rabbitmq, kafka, Docker, Docker Compose, CI/CD, Lambda Functions, Celery, Huey, Background task, backend development, API Developer, Backend Developer, Python, Stripe, Payments, Payment gateway, Payment Integration, SMS, Email, SSO, SAML, SMTP, Python Script, Selenium, Playwright, Scrapping

I am a Backend Engineer with strong experience building scalable web applications, high-performance APIs, and data-driven systems using Python and Golang. I specialize in designing clean backend architectures, optimizing performance, and building reliable systems that support real-world products. I have worked on platforms involving complex business logic, large datasets, real-time features, and API integrations. My focus is writing maintainable, production-ready code and helping businesses move from idea to a stable, scalable product. Core Technologies Backend Development • Python (Django, Django REST Framework, FastAPI, Flask) • Golang (Gin) • REST APIs, GraphQL APIs • Microservices & API-first architecture Databases & Caching • PostgreSQL • Redis • MySQL • Query optimization & performance tuning Frontend & Full-Stack • Next.js • React • Angular Real-Time & System Features • WebSockets • WebRTC • Background workers & async processing Dev & Monitoring Tools • Docker • Grafana • CI/CD pipelines Additional Expertise Web Scraping & Data Extraction • Scrapy • BeautifulSoup • Selenium I can build reliable scrapers that handle: • dynamic JavaScript pages • authentication & session management • AJAX requests • API extraction • large-scale data collection pipelines Let’s collaborate to build a reliable, scalable, and future-proof backend for your product.

Hi All, I am a Python Developer with over 5 years of experience specializing in end-to-end automation, sophisticated web scraping, and custom software development. I bridge the gap between complex data challenges and efficient, scalable solutions. My expertise lies in navigating highly secured digital environments and transforming raw information into actionable data. 𝐖𝐡𝐲 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞? I provide one year of complimentary free technical support for every successful deployment. I focus on building resilient tools that don't just work today, but continue to perform long-term. 𝐒𝐤𝐢𝐥𝐥𝐬 Web Automation: Playwright, Selenium, DrissionPage; headless + stealth workflows Web Scraping & Data Extraction: HTML parsing, pagination, concurrency, resilient retries Anti-Bot & CAPTCHA Handling: reCAPTCHA v2/v3 Enterprise, Cloudflare Turnstile, DataDome, Imperva; proxy rotation and fingerprint-aware flows API Development: FastAPI, REST, async endpoints, background jobs, webhooks API Integration: OAuth2, JWT, third-party APIs, rate-limit handling, robust error handling Chatbots: Telegram/Discord/Slack bots, webhook-based bots, automation-trigger bots, AI/LLM integrations when needed Chrome Extensions: Manifest V3, content scripts, background/service worker, automation helpers, DOM tooling Data Processing: Pandas, NumPy; cleaning, deduplication, merging, reporting/export PDF Automation: Table/text extraction, structured parsing, OCR when needed Image Processing: OpenCV, Pillow; preprocessing, detection, OCR pipelines Form Automation: Multi-step submissions, file uploads, validation handling, captcha-aware flows Desktop Apps: PyQt6, Tkinter, internal tools, dashboards, automation GUIs Databases: SQLite, PostgreSQL/MySQL basics; ORM patterns when needed DevOps/Runtime: Linux, VPS deployment, Docker basics, logging/monitoring, cron/worker setups

⭐️ Skillset Back End: - Python, Django, Flask, FastAPI - SQL (MySQL, PostgreSQL, SQLite), NoSQL (MongoDB, AWS DynamoDB) - API design (Django Rest Framework, Flask API) - Deployment (AWS, GCP, Digital Ocean) DevOps: - Docker, Docker Compose - CI/CD (CircleCI, GitHub Actions) - AWS - Terraform Web and Mobile development: - HTML5, CSS3, Javascript - Frameworks (ReactJS & React Native) 🏆 Top Rated Upwork Freelancer 🕓 1300+ hours worked, 10+ jobs ⭐ 5-star reviews from happy customers 🎯 100% Job Success-oriented work 💬 Open-minded person, ready to learn anything, easy to work with What you can expect: - On-time delivery - Clean, maintainable code - Smooth collaboration Let's chat! I'm eager to learn more about your project and explore how we can work together to produce the best quality work. 🌻 Thanks for your time and good luck!

Welcome 👋I am an experienced web developer who is passionate about delivering successful projects and has a track record of delivering them 🚀 🔑Key points about me: - Expert web developer with over 4 years of experience developing complex web applications. - Good communicator, with experience managing and leading development teams. - I have an entrepreneurial mindset and a product-oriented mindset, I enjoy not just writing code, but making projects successful. - A full-fledged developer, although I prefer the back-end. - Deep understanding of OOP, design patterns, domain-oriented design. - Specializes in React, Python, TypeScript, Flask, Django, FastAPI, WEB3 - Ability to write complex and efficient database queries, optimizing the site's performance. Knowledge of NoSQL (MongoDb), SQL(Postgresql, MySQL, SQLite). - Algorithms and Data Structure, Catching(Redis) - Experience with asynchronous messaging/queue processing. - Worked with many APIs such as Stripe, Saferpay, Twilio, Cronofy, Sendgrid, Hubspot, Zapier, Viva, PayPal and more. 💻When programming, I use industry best practices to achieve the best results; I consider myself a talented programmer. I am detail-oriented, my code is always well-commented, clean and easy to understand. I am also a quality-oriented developer and my code is always well-tested. I am able to plan, execute, test and launch projects. I am a self-starter who can see things through to the end. I am passionate about building great projects and helping companies succeed. Feel free to message me to discuss your project and make it a success!🚀🚀🚀

Hi, I’m Trevin Keith Faulkner, a backend developer specializing in building reliable, scalable, and high-performance systems using Python and modern frameworks like Django, FastAPI, and Flask. I help businesses turn complex problems into clean, efficient, production-ready solutions. With hands-on experience across cloud infrastructure, automation, and distributed systems, I bring both engineering depth and a strong sense of ownership to every project. What I Bring to the Table ✅ Python Expert — Writing clean, maintainable, well-architected backend code ✅ Django / FastAPI / Flask — APIs, microservices, full backend systems ✅ Database Design & Optimization — Postgres, MySQL, MongoDB ✅ Cloud & DevOps — AWS (S3, EC2, Lambda), Docker, Kubernetes ✅ Async Task Processing — Celery, Redis ✅ CI/CD Automation — Jenkins & modern DevOps workflows ✅ Integrations & Auth — OAuth2, RESTful APIs, GraphQL, third-party integrations ✅ Odoo Development — Custom modules, workflows, automation How I Work I focus on writing performant code, communicating clearly, and delivering results that are easy to maintain and scale. Whether you need a new API built, a legacy system modernized, or infrastructure set up correctly the first time—I’ve got you covered. Let’s Build Something Great! If you're looking for a backend developer who understands both the code and the bigger engineering picture, I’d love to talk.

𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐀𝐈 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫 | 𝐄𝐧𝐝-𝐭𝐨-𝐄𝐧𝐝 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 | 𝟓+ 𝐘𝐞𝐚𝐫𝐬 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐢𝐧𝐠 𝐄𝐱𝐜𝐞𝐥𝐥𝐞𝐧𝐜𝐞 I build intelligent, scalable solutions from concept to production—handling every layer including frontend/backend/database/cloud with precision and expertise. ✨ 𝐂𝐨𝐦𝐩𝐥𝐞𝐭𝐞 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐂𝐚𝐩𝐚𝐛𝐢𝐥𝐢𝐭𝐲 Backend architecture • Frontend development (React/HTML/CSS) • Mobile App Development with Flutter/React native/Expo • Database optimization • Cloud deployment — all under one roof, ensuring seamless integration and faster delivery. ⚡ 𝐑𝐚𝐩𝐢𝐝 𝐏𝐫𝐨𝐭𝐨𝐭𝐲𝐩𝐢𝐧𝐠 I deliver working POCs and demos within shorter time spanning few hours, allowing you to validate solutions before committing to full development. 🌟 𝐅𝐥𝐞𝐱𝐢𝐛𝐥𝐞 𝐂𝐨𝐥𝐥𝐚𝐛𝐨𝐫𝐚𝐭𝐢𝐨𝐧 Competitive rates with willingness to adjust pricing for extended partnerships and long-term projects. 𝐂𝐨𝐫𝐞 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 𝐀𝐈 & 𝐋𝐋𝐌 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 🔗 Enterprise RAG chatbots with Langchain and intelligent collaborative LLM agents 🤖 Multi-agent systems using OpenAI agents, LangGraph, OpenClaw, CrewAI, Phidata, and Autogen 🗓️Integration of agents with integrations like Gmail, Google Calendar, HubSpot, Google Sheets, Salesforce, ZohoCRM, Outlook, Slack, etc. Ⓜ️Integration of meeting agents with Google Meet, Teams and Zoom to automate transcribe and summarization of call. 🕸️Integration of different tools like image edit with Google's Nano banana / veo3.1, Sora video generation apis, claude-like artifact generation, klingAI video generation, etc. ☁️ Production LLM deployments on AWS Bedrock, Sagemaker, EC2, and Kubernetes 🏆 Multi-model integration: GPT-5/4.1, Claude 4.5, Llama 4, Mistral, Gemini Pro, Groq (with LangSmith/LangFuse evaluation) 🎯 Custom model fine-tuning: OpenAI, Mistral-7b, LLAMA3-GGUF 🛠️ Vector database implementation: Pinecone, FAISS, ChromaDB, Qdrant, Weaviate 💬 Omnichannel deployment: Slack, WebEx, WhatsApp, Telegram, Discord ⛓️ Advanced prompt engineering: Chain-of-Thought, ReAct, iterative optimization 🕸️ Text-to-Video and Image-to-Video generation with comfyUI [both short and long form] 🦾 NLP capabilities: Sentiment analysis, text summarization, classification 🔊 Audio intelligence: Transcription, TTS, STT systems 🎧 Intelligent CRM automation with voice bot integration 🖼️ Computer Vision: Image segmentation, object detection/tracking, Stable Diffusion, GANs 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 💻 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠: FastAPI, Django, Flask—building robust, scalable APIs 🎨 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: React, Typescript, HTML5, CSS3—crafting responsive, intuitive interfaces 📱 𝐌𝐨𝐛𝐢𝐥𝐞 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: React Native/Expo/Flutter—cross-platform iOS & Android apps with native performance 💰Payment Methods Integration: Stripe, Shopify 🗄️ 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭: PostgreSQL, MySQL, SQLite, MSSQL, Airtable—optimized schemas and queries ☁️ 𝐂𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬: Docker, Kubernetes, AWS, GCP, DigitalOcean—automated CI/CD pipelines 📊 𝐐𝐮𝐚𝐥𝐢𝐭𝐲 𝐀𝐬𝐬𝐮𝐫𝐚𝐧𝐜𝐞: Comprehensive testing, monitoring, and performance optimization 𝐀𝐝𝐝𝐢𝐭𝐢𝐨𝐧𝐚𝐥 𝐂𝐚𝐩𝐚𝐛𝐢𝐥𝐢𝐭𝐢𝐞𝐬 🔍 Advanced web scraping: LinkedIn, Reddit, Twitter, Amazon, eBay, Walmart 📈 Predictive analytics and forecasting algorithms 🔄 Third-party API integration and service orchestration 📆 Version control expertise: Git, BitBucket 𝐖𝐡𝐚𝐭 𝐘𝐨𝐮 𝐂𝐚𝐧 𝐄𝐱𝐩𝐞𝐜𝐭 ✅ 𝐄𝐧𝐝-𝐭𝐨-𝐄𝐧𝐝 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐲: Complete project lifecycle from requirements gathering to post-deployment support ✅ 𝐑𝐚𝐩𝐢𝐝 𝐏𝐎𝐂 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: Rapid prototyping to demonstrate feasibility and approach ✅ 𝐏𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐨𝐧-𝐆𝐫𝐚𝐝𝐞 𝐐𝐮𝐚𝐥𝐢𝐭𝐲: Clean, documented code following industry best practices ✅ 𝐒𝐞𝐚𝐦𝐥𝐞𝐬𝐬 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧: Unified backend, frontend, and database architecture ✅ 𝐒𝐜𝐚𝐥𝐚𝐛𝐥𝐞 𝐈𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞: Cloud-native deployments with monitoring and auto-scaling ✅ 𝐎𝐧𝐠𝐨𝐢𝐧𝐠 𝐒𝐮𝐩𝐩𝐨𝐫𝐭: Performance optimization and maintenance post-launch ✅ 𝐓𝐫𝐚𝐧𝐬𝐩𝐚𝐫𝐞𝐧𝐭 𝐂𝐨𝐦𝐦𝐮𝐧𝐢𝐜𝐚𝐭𝐢𝐨𝐧: Regular updates and collaborative decision-making Whether you need an AI-powered application, a complete web/mobile platform, or intelligent automation—I will deliver sophisticated solutions that drive real business value. Ready to discuss your project? I'll provide a working demonstration within 24 hours to show exactly how I can bring your vision to life. 💼 Available for immediate start | ⚡ Responsive communication | 🌍 Proven global delivery

Hi, I'm Vlad – a Back-End Developer with 4 years of experience building scalable, secure, and efficient web applications. I specialize in backend development using modern frameworks and tools, and I’m passionate about creating systems that are not only functional but also maintainable and performance-optimized. Let me be the technical foundation behind your project — whether it’s designing robust APIs, managing databases, or deploying your app to the cloud, I’m here to make sure it all runs smoothly. 🔧 Core Skills & Technologies: - Languages & Frameworks: Python, FastAPI, Django/DRF, Flask, Celery, SQLAlchemy, Bootstrap - Databases: SQLite, MySQL, PostgreSQL, Microsoft SQL, Alembic - NoSQL & Caching: MongoDB, DynamoDB, Redis - Front-End Basics: HTML, CSS, LESS, Sass - DevOps & Cloud: AWS, Heroku - Scraping & Automation: Selenium, Playwright, BeautifulSoup, Scrapy, Requests, LXML, undetected-chromedriver, Data parsing & cleaning - Version Control: Git (GitHub, GitLab, BitBucket) 💼 Why Work With Me? ✔️ Proficient in choosing the right framework for your specific needs ✔️ Comfortable in team settings and strong in independent problem-solving ✔️ Committed to writing clean, maintainable, and testable code ✔️ Open to feedback and constant improvement ✔️ Focused on delivering not just code, but business value 📩 Let’s connect and bring your ideas to life with solid, backend architecture that performs.

AI & Backend Engineer | Tech Lead & Engineering Manager (100% Job Success, Top Rated Plus, Expert Vetted, 4,200+ Upwork hours). I design and deliver RAG pipelines, multi-agent LLM apps, FastAPI microservices, and MLOps systems on AWS/GCP/Azure—enterprise-ready, scalable, and secure. What I Build RAG & LLM Applications — OpenAI, Azure OpenAI, AWS Bedrock, Anthropic; LangChain/LlamaIndex; vector search and vector databases (Pinecone, Weaviate, FAISS); prompt engineering, guardrails, and evaluation harnesses for quality, latency, and cost. Multi-Agent Workflows — tool design, orchestrators, short/long-term memory, function calling, and policy controls for support, operations, and research automation. Backend Microservices & APIs — Python, FastAPI, REST/GraphQL, event-driven patterns with Kafka/SQS, API Gateway, auth, rate-limiting, and observability. MLOps — CI/CD for ML, MLflow & model registries, feature storage, batch/real-time inference, A/B and shadow deployments, monitoring & alerting. Cloud Architecture (AWS/GCP/Azure) — Docker, Terraform/IaC, AWS Lambda/ECS/S3/IAM/CloudWatch, cost controls, security baselines, secrets management. Leadership & Delivery Operate as IC, Tech Lead, or Engineering Manager. I handle system architecture, technical roadmaps, sprint planning, backlog/prioritization, stakeholder comms, code reviews & mentoring, estimation, and KPI-driven delivery (accuracy, latency, cost, reliability). Clear documentation (design docs, ADRs, runbooks) is included. Recent Wins (representative) Policy-safe multi-agent workflow for research/drafting → 100+ hours saved per month; measurable quality gates and auditability. Streaming pipeline modernization (event-driven) → data freshness improved from daily batches to near real-time; reduced ops toil. RAG knowledge system + eval harness → higher factual accuracy, lower support handle time; dashboards for latency and cost. Typical Engagements Production RAG MVP (OpenAI/Azure/Bedrock) — ingestion/chunking, retrieval, prompt strategy, evals, vector DB, metrics, and handoff. Multi-Agent Automation for Support/Ops — tool stack, orchestrator, safety/policy rules, runbooks, latency/cost dashboards. FastAPI Microservice + CI/CD — service template, tests, auth, Docker, GitHub Actions, deploy to AWS, logging/metrics. MLOps Starter (Databricks/MLflow) — experiment tracking, model registry, deployment patterns, sample pipeline. RAG/LLM Stack Audit — architecture review, eval gaps, reliability/cost plan, prioritized recommendations. Industries & Data SaaS, data platforms, operations/support tooling, analytics, internal knowledge bases, ETL/ELT modernization, research automation. Comfortable with PII handling patterns and least-privilege designs. Tooling & Stack Python, FastAPI, Docker, Terraform, AWS (Lambda/ECS/S3/IAM/CloudWatch), GCP, Azure, Kafka, Postgres, Redis, Databricks/MLflow, Pinecone, Weaviate, FAISS, LangChain, LlamaIndex, OpenAI, Anthropic, AWS Bedrock. Quality, Security & Ops Tested deliverables (unit/integration), structured logging and tracing, env isolation, secret management, access controls, rollout/rollback plans, and documentation for maintainers. I prioritize reliability, observability, and cost transparency. How I Work Architecture → milestone plan → rapid MVP → evaluations & KPIs (accuracy, latency, cost) → iterate → docs & recorded handoff. US timezone; proactive, plain-English updates; async-friendly collaboration via GitHub/Jira/Slack. Next Step Whether you need a hands-on AI engineer or a Tech Lead to guide a team, I’ll help you ship production-grade systems with clarity and speed. Share your use case (data sources, target users, success metrics), and I’ll send a scoped plan within one business day.

AI & Backend Engineer with more than 4 years of experience in full stack software development I build practical end to end solutions across backend, AI, automation and full stack systems with 4+ years of experience shipping products that work at scale. 💎 What I Work With Languages and Tools Python • JavaScript • TypeScript • Git Machine Learning and AI PyTorch • Transformers • LangChain • LangGraph • RAG • Agents • LLM Integration • n8n Backend Development FastAPI • Flask • Django • Node.js • Express • Nest.js Frontend React • Next.js Cloud and DevOps AWS • GCP • Docker • CI/CD • API Integration Data and Analytics Apache Beam • Dataflow • BigQuery • MongoDB (advanced aggregations and CDC) Recent Projects I’ve Built • RAG sytem crypto and stock trading support bot for Discord server with Ollama + Llama3, deployed to EC2 • Fine-tuned MT5 for Amharic text summarization with Transformers, PyTorch and custom Amharic dataset • E-learning platform with real-time data (CDC + Apache Beam + GCP + ETL) • Web-searching chatbot with Groq + Gemini LLMs using LangGraph • Multi agent stock trading app for finance industry with LangGraph, Groq, Gemini, and Hugging Face embeddings. Let's connect !