Hi! I'm Jônatas, a web developer specialist with 17+ years of experience! I help people and businesses achieve great results through technology. I work with design APIs using Monolith, SOA or Microservices. Work with mainly web frameworks in Python and work with desktop and APIs with Rust programming language. I know DevOps and work with main clouds like Dokku, GCP, AWS, DO, Heroku and more. Why Hire Me? ✅ Quality support and communication. ✅ Respond quickly to the client's message. ✅ Very straight and to the point. ✅ Products with high quality and using main techniques of development. ** Technologies Highlights ** ✅ Python / Flask / Django / Django Rest Framework / FastAPI / Pytest ✅ Javascript / TypeScript ✅ Kafka / RabbitMQ ✅ Vue / Nuxtjs / Svelte / HTML / CSS / SASS ✅ Bootstrap / Tailwind / Material ✅ Rust / Actix / Axum / Ntex / Druid ✅ AWS / GCP / Digital Ocean / Heroku / Render ✅ Postgres / MySQL / MariaDB / MongoDB / Redis / Elastichsearch ✅ Docker / Podman ✅ GitHub Action / Circle CI / Cloud Build / Aws Build ✅ Apache, Nginx, gunicorn, uwsgi, uvicorn Send me a message and I will get back to you ASAP so that we can get started. Regards, Jônatas

I am an AI-focused Full-Stack Developer with expertise in Python, scalable architectures, and enterprise-grade automation solutions, backed by 6+ years of experience building scalable web applications, AI-powered platforms, automation systems, and cloud-native solutions for startups and enterprises. I help businesses automate workflows, build intelligent AI systems, develop scalable SaaS platforms, and launch production-ready applications faster with clean architecture and performance-focused development. I specialize in combining AI, backend engineering, data workflows, and modern frontend technologies to create reliable, scalable, and business-driven solutions. What I Bring to Your Project - End-to-end product development- from architecture to deployment - AI-powered applications and intelligent automation systems - Scalable backend APIs and microservices - Modern, responsive frontend applications - Cloud deployment, DevOps, and performance optimization - Clean, maintainable, production-ready code - Fast communication and reliable delivery Core Expertise: 1. Python Backend Development - FastAPI, Django, Flask - REST APIs & Webhooks - Microservices Architecture - Authentication & Secure Backend Systems - API Integrations & Third-Party Services - Automation Scripts & Backend Optimization - Scalable System Design 2. Data Engineering & Data Processing - ETL Pipelines & Data Automation - Data Processing & Transformation - Vector Databases (Pinecone, ChromaDB, Weaviate, FAISS) - PostgreSQL, MongoDB, DynamoDB - Workflow Automation & Data Synchronization - Intelligent Document Processing - Semantic Retrieval Systems 3. Front End Development - React, Next.js, Vue.js - TypeScript & JavaScript (ES6+) - Responsive UI/UX Development - Frontend Performance Optimization - API Integration & State Management 4. AI Engineering & Generative AI - GPT-4, OpenAI, Claude, Gemini, LLaMA, Mistral integrations - AI Agents & Autonomous Workflows - LangChain, LangGraph, AutoGen - Conversational AI & AI Chatbots 5. AI SaaS Development: - RAG (Retrieval-Augmented Generation) - AI Voice Agents & Real-time AI Systems - Semantic Search & Vector Databases - AI Automation & Intelligent Workflows - Text Processing, Summarization & Data Extraction 6. Cloud & DevOps: - AWS (EC2, Lambda, S3, CloudFront, DynamoDB) - Docker & CI/CD Pipelines - Serverless Applications - Deployment Automation - Scalable Cloud Architecture AI Tools & Technologies: Vector Databases: Pinecone, ChromaDB, Weaviate, FAISS AI & LLMs: OpenAI, GPT-4, Claude, Gemini, LLaMA, Mistral AI Frameworks: LangChain, LangGraph, AutoGen, PyTorch, TensorFlow Automation: n8n, Make, Zapier, Airtable, Notion Voice AI: Twilio, Deepgram, ElevenLabs, VAPI, Cartesia Proven Track Record: $100K+ Earnings on Upwork 5,400+ Hours Worked 60+ Successful Projects Delivered Long-Term Client Relationships I focus on building scalable, reliable, and AI-driven solutions that create real business impact. If you’re looking for a developer who understands both engineering and business needs, I would be happy to help bring your project to life.

Over the last 5 years, I have managed plenty of projects effectively including: TECHNICAL SKILLS: - Primary Languages: Python, Django, Flask, React.js, Java, Typescript, JavaScript, GraphQL, Apollo Client, Apollo Server - Database: Sqlite3, MSSQL, MySQL, Mongo DB, DynamoDB, Oracle 11g - IDE’s: PyCharm, Eclipse, NetBeans, MS Visual Studio, PyDev, RIDE - Servers: Apache Tomcat, WebSphere, JBoss, WebLogic, XAMPP - Deployment tools: MS Azure, Heroku, Amazon Web Services (EC2, S3, EBS, ELB, SES) - Web Technologies: HTML, CSS, DHTML, XML, JavaScript - Operating systems: Windows, Mac, Fedora Linux, Red hat Linux - SDLC Methods: SCRUM, Agile - Testing Frameworks: Junit, TestNG, ROBOT, JXL, JTest - Bug Tracking Tools: Axosoft, JIRA, Bugzilla, Rational Clear-quest - Version Control: VSS, SVN, GitHub, Git Specialization * Designing scalable system architecture with maintainability in mind * Refactoring prototypes into production-quality implementations * Setting up and improving the development process * Software development team management * API implementation: REST API , GraphQL API * Database engineering: PostgreSQL, MySQL, Redis Communication 📞: - customer's environment (usually Slack) - customer's issue tracker (usually Jira, Trello, Github, bitbucket). - Zoom/Teams video calls

I help startups and small teams build MVPs and production ready web applications using Next.js, FastAPI, and Node.js: fast, clean, and scalable. ✔ Built MVP platforms from scratch ✔ Long-term clients, Top Rated, 100% Job Success ✔ Strong in backend APIs, scraping, and system integration

I’m a Backend Engineer specialized in Python with over 4 years of experience building scalable, high-performance systems across multiple industries, including tourism, insurance, real estate, video streaming, marketing, messaging/notifications, beauty/salon tech, startups, and blockchain/crypto (Bittensor). As Founder and CTO of an award-winning tourism startup, I’ve led full-stack technical teams, defined software architecture from scratch, and launched robust platforms that have scaled to production with SEO, CI/CD, multichannel notifications, and integrated payments. My work has been recognized with national entrepreneurship awards and funding grants. I bring a strong background in Python and its most powerful backend frameworks (Django, FastAPI, Flask), and I’ve used them to solve real-world problems in fast-paced, high-impact environments. From building data pipelines and microservices to integrating third-party APIs and writing tests with over 93% coverage — I’m all about clean, maintainable, and scalable backend systems. Across Upwork and other international projects, I’ve completed long-term engagements (1,900+ hours, $10K+ earned) with clients from the U.S., Spain, Argentina, and Colombia, always delivering clean code, rock-solid architecture, and clear communication. What I Do Best 🚀 ✔ Python Backend Expert Deep experience in Python and core frameworks: Django, FastAPI, Flask, Django REST Framework Built complex RESTful APIs, webhook-based systems, and authentication flows (OAuth, JWT) Architected systems using Ports & Adapters, microservices, and MVC patterns Implemented asynchronous systems with Celery, BackgroundTasks, queues, and cronjobs ✔ Scalable Systems Across Diverse Industries Tourism: CTO of a full-featured tourism startup with booking, SEO, payments, notifications, and CMS Insurance: Integrated SOAP/REST services from insurance providers into a single Django backend (93%+ test coverage) Real Estate: Aggregated data from multiple listing providers, created synchronization and ETL pipelines Beauty & Salon: Built backend tools for dynamic service configuration, campaign rules, and client messaging Streaming Media: Developed a RESTful backend with media management and recommendation logic (35% engagement boost) Marketing & Notifications: Manage WhatsApp and Twilio, created campaign systems with advanced validation logic Crypto & Blockchain (Bittensor): Built shell-based automation tools, miner installers, and contributed to open source infrastructure Startups: Regularly involved in MVP design, scaling strategy, CI/CD pipelines, and team mentoring ✔ Infrastructure & DevOps for Real Projects Provisioned and maintained environments on AWS (EC2, RDS, S3) and GCP Used Docker, GitHub Actions, Terraform, and CI/CD pipelines for stable deployments Automated developer environments and onboarding with Bash/Shell scripts, reducing setup time by 75% ✔ Data-Driven Integrations & ETL Work Designed and deployed ETL flows with Airbyte, leveraging cloud storage (S3, GCP) and AI tools (LlamaIndex) Connected and normalized data from external APIs, NoSQL, and relational DBs Built dashboards, internal tools, and backend logic to make sense of data ✔ Engineering with Quality First Developed test suites with Pytest, enforced code style with Ruff, Black, and pre-commit Achieved 93%+ test coverage in several production systems Maintained detailed technical documentation, READMEs, and onboarding material ✔ Leadership & Communication As CTO, led a cross-functional team of devs and marketers, defined architecture, and maintained stakeholder communication Managed development cycles with Jira, collaborated with frontend teams, and used Confluence for project alignment Participated in open source (PRs merged) and mentored devs Tech Stack Overview Languages: Python, Bash, JavaScript, Go, Java Frameworks: Django, FastAPI, Flask, Django REST Framework, Celery Architecture: Microservices, Ports & Adapters, MVC, Factory, Strategy, Observer Integrations: REST APIs, SOAP, Webhooks, WhatsApp, Twilio, Shopify, Wompi, OAuth2, Auth0 DevOps/Cloud: AWS (S3, EC2, RDS), GCP, Docker, GitHub Actions, Terraform, CI/CD, R2 Databases: PostgreSQL, MySQL, MongoDB, Firebase ETL & AI: Airbyte, LlamaIndex QA & Testing: Pytest, Ruff, Black, Postman Project Tools: Jira, Confluence, GitHub, GitLab SEO/Marketing: Facebook Ads, dynamic/static SEO optimization, conversion strategies Achievements & Recognition Winner – Collision EBT (MacondoLab – Universidad Simón Bolívar) Winner – Nuestra Barranquilla (Fundación Corona) – Received ~$10K in pre-seed funding Reduced dev onboarding time by 75% through Bash scripting Boosted engagement by 35% through membership-based recommendation systems Delivered systems with >93% test coverage, high uptime, and strong documentation Worked across startups, SaaS platforms, and open-source ecosystems in 4+ countries

✅ Upwork-Endorsed Python/Django Developer skilled in DRF API and PostgreSQL. I bring expertise in developing scalable backend systems and deploying modern AI solutions. 💼 𝗪𝗵𝗮𝘁 𝗬𝗼𝘂 𝗚𝗲𝘁 𝗪𝗵𝗲𝗻 𝗬𝗼𝘂 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗠𝗲: 👉 Scalable, Clean Code: Solutions that grow with your business, built to last 👉 Full-Stack Mastery: Seamless integration of backend and frontend technologies 👉 AI-Powered Innovation: Chatbots, LLMs, and advanced machine learning solutions 👉 Performance Optimization: Boost your app's speed by up to 85% 👉 Cloud Deployment Expertise: Scalable solutions on AWS, Google Cloud, and more 👉 Agile Leadership: Proven ability to lead teams and manage full-cycle projects 👉 Transparent Communication: Clear, concise updates throughout the project lifecycle 🏆 𝗪𝗵𝘆 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝗲? ✅ 100% Satisfaction Guarantee: Your vision, delivered as promised, or your money back ✅ Rapid Response Time: Expect replies within 30 minutes during business hours ✅ On-Time, On-Budget Delivery: Track record of meeting deadlines and expectations ✅ Product-First Approach: Data-driven decisions to maximize your project's impact ✅ Open Source Contributor: Active member of the Python community (LangChain contributor) 🚀 𝗜'𝗺 𝗬𝗼𝘂𝗿 𝗜𝗱𝗲𝗮𝗹 𝗣𝗮𝗿𝘁𝗻𝗲𝗿 𝗜𝗳: - You need a Python expert who can handle complex, large-scale projects - You're looking to integrate AI and machine learning into your existing systems - You require optimized performance for high-traffic applications - You want to build robust, scalable APIs for web and mobile applications - You need a full-stack developer who can seamlessly bridge the backend and frontend - You're seeking someone who can lead a development team effectively ❌ 𝗪𝗲 𝗠𝗶𝗴𝗵𝘁 𝗡𝗼𝘁 𝗕𝗲 𝗮 𝗚𝗼𝗼𝗱 𝗙𝗶𝘁 𝗜𝗳: You're looking for the cheapest option rather than the best value You need expertise in languages other than Python or JavaScript You require an immediate turnaround without proper planning You're not open to collaborative, iterative development processes 🤝 𝗟𝗲𝘁'𝘀 𝗖𝗼𝗻𝗻𝗲𝗰𝘁! If you're ready to bring your Python project to life with a dedicated, skilled professional, let's chat. Whether you're starting from scratch or need to optimize an existing system, I'm here to help you succeed. Reach out today, and let's build something amazing together! 🚀🐍💻

🌟🌟🌟🌟🌟 Yasir is a professional Python and AI developer providing services with polite and clear communication, 🏆 on-time delivery, 🏆 100% job completion, and 🏆 6+ years of professional experience in Python backend development, Django, FastAPI, and AI/LLM applications. You can see my CV link in the portfolio section. 👋 Hello clients, Thank you for visiting my profile. I have 4+years degree of Computer Science and extensive experience in Python backend development, including Django and FastAPI frameworks, REST APIs, asynchronous systems, and AI/LLM integration. I also have deep experience in building chatbots, LangChain workflows, LangGraph knowledge systems, and NLP pipelines. The services that I'm providing are: -------------------------------------- Python Backend & Web -------------------------------------- ✅ Advanced Python scripts and backend solutions ✅ Django and Django Rest APIs ✅ FastAPI for asynchronous, high-performance endpoints ✅ Redis and ClickHouse for caching and analytics ✅ Multi-processing and multi-threading for concurrent workflows ✅ Celery for task scheduling and background jobs ✅ Integration with third-party APIs and services ✅ Scalable cloud solutions (AWS, Azure) -------------------------------------- AI, LLMs & NLP -------------------------------------- Building AI-driven applications including chatbots, knowledge systems, and retrieval-augmented workflows. ✅ OpenAI API integration for GPT-based solutions ✅ LangChain orchestration and LangGraph knowledge systems ✅ Fine-tuning, embeddings, and vector database pipelines ✅ NLP pipelines: text processing, semantic search, summarization ✅ Deployment of AI models into production ✅ AI workflow automation and intelligent system design -------------------------------------- DevOps & Cloud -------------------------------------- ✅ Docker, Kubernetes, CI/CD pipelines ✅ AWS and Azure cloud services integration ✅ Scalable architecture design for AI and backend applications #Python #AI #LLM #LangChain #LangGraph #OpenAI #Chatbots #FastAPI #Django #Backend #NLP #Cloud #Docker #Kubernetes

I am an AI Engineer specializing in building autonomous agents and production-grade data systems. I help businesses move beyond experimental prototypes to deploy scalable, reliable AI architectures that solve actual operational problems. What I Build Autonomous AI Agents: I design agents that can reason, plan, and execute complex workflows (e.g., browsing, tool usage, API interaction) without constant human oversight. I utilize PydanticAI to ensure structured, type-safe responses rather than unpredictable text generation. Advanced RAG & Search: I build retrieval systems that allow AI to accurately access your private data. My approach combines vector search with Elasticsearch for precise, hybrid retrieval (keyword + semantic) that powers reliable answers. Scalable Data Pipelines: AI is only as good as its data. I engineer robust ETL pipelines using Apache Airflow and Spark to ingest, clean, and organize high-volume datasets for real-time processing. Production Backends: I deliver fully deployed applications, not just scripts. I build high-performance asynchronous APIs using FastAPI and Docker, ensuring your AI integrates seamlessly with your existing web or mobile products. Technical Stack AI & Agents: PydanticAI, OpenAI, Gemini Backend & Infrastructure: Python, FastAPI, Docker, SQLModel Data & Search: Elasticsearch, PostgreSQL, Apache Airflow, Apache Spark I focus on writing clean, maintainable code that is ready for production environments. If you have a clear use case or need architectural guidance, invite me to your job and we can discuss the implementation.

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!

📈Proudly elevating products in AI 🎯 If you're looking for someone who doesn't just write code but helps you take your product all the way from idea to launch, then you are scrolling right profile. 🚀 Hi, I’m Sonu, a young visionary entrepreneur and a full-stack engineer with 10+ years of hands-on experience building, scaling, and modernizing web platforms across diverse domains. With that said, I am proud to say that I have launched 3 of my products in the market which always help me guide my clients on how to strategize their startup ideas till launch. 💡 My expertise spans JavaScript, Typescript, React.js, Node.js, Next.js, Angularjs, Python, Gen AI, RAG and modern front-end and back-end architectures, with a strong focus on performance-driven, responsive, and scalable web applications. ⚡ Over the years, I’ve worked extensively in startup and SMB environments, where speed, ownership, and engineering discipline matter most. I’m comfortable operating in fast-moving, ambiguous problem spaces, translating product vision into clean, maintainable, and production-ready solutions. 🧠 I bring a long-term engineering mindset to every project, emphasizing code quality, system reliability, and future scalability, which you can easily observe from my GitHub and Stack Overflow profiles 🛠️ Technical Expertise 🚧 Frontend & Backend ✅ JavaScript - React.js, Node.js, Angular.js, Next.js, Express.js ✅ TypeScript 🤖 AI & Backend ✅ Python - Django & Flask for AI projects with Fast APIs ✅ Gen-AI Tools - Cursor AI, Lovable, Replit, UIzard, Claude, n8n, GPT (for rapid turnaround) ✅ RAG, ComfyUI, Flux, SDXL, Anthropic Claude API, Gemini, langchain, pinecone vector database, Weaviate vector database, Railway, cursor AI 🎨 UI & Styling ✅ CSS Frameworks - Bootstrap, Foundation, Semantic UI, Skeleton ✅ UI Libraries - Material UI, MaterializeCSS, Ant Design ✅ SaaS, LESS 🏗 Architecture & Data ✅ Microservices Architecture ✅ Databases - MySQL, PostgreSQL, MongoDB, Supabase ✅ GraphQL, Apollo, Parse Server 🔌 APIs & Integrations ✅ RESTful, Swagger, SOAP, OAuth-based APIs ✅ Shipping APIs - UPS, USPS, FedEx ✅ Amazon APIs (MTurk, SimpleDB) ✅ Google APIs 🚀 DevOps & Delivery ✅ CI/CD Pipelines ✅ Project Management - JIRA, Confluence, Pivotal Tracker, Basecamp 🌱 I’m passionate about delivering high-quality software, leveraging cutting-edge technologies, and staying aligned with industry best practices. I value collaboration, continuous learning, and team ownership, ensuring every solution is scalable, efficient, and impactful. 🙏 Thanks for checking out my profile. ✨ Let’s bring your smart ideas to life.