👋 Hi, I’m a 🏆 ⭐️⭐️⭐️⭐️⭐️Top Rated Python Data Engineer & Data Visualization Expert at GroupBWT - a 100+ person data engineering company and official AWS, Snowflake & Databricks partner, building enterprise data systems since 2009. As a Python Big Data Engineer, I specialize in designing scalable data systems. My role as a Big Data Engineer is focused on building reliable pipelines, automation, and analytics infrastructure. Every Python Data Engineer decision I make is oriented toward scalability, performance, and data reliability. I work as a Big Data Engineer and Python Data Engineer on enterprise-grade systems where architecture matters for both ingestion and transformation layers. As a Data Engineer, I ensure that raw data becomes structured, usable, and ready for business intelligence. Here’s how I support our clients as a Python Big Data Engineer: ✅ Our ETL pipelines process over 100 million records monthly across major cloud data warehouses
 ✅ My solutions reduce manual reporting effort by up to 80% through end-to-end automation
 ✅ We build Python Data Engineer workflows for integrating and transforming complex datasets ✅ Every pipeline is tested and quality-checked to meet enterprise data standards 🔁 What I Do as a Python Azure Data Engineer and azure data engineer ⚙️ Data Engineering (Python AWS Data Engineer Core Work) 🔹 API & event-based ingestion using Python Data Engineer best practices 🔹 Python + SQL transformations 🔹 Data modeling, schema design, enrichment 🔹 ETL/ELT into Snowflake, Databricks, BigQuery with Python Data architecture 🔹 Monitoring, retries, observability & data quality testing for Python Data pipelines 🔹 CI/CD for pipelines & cloud cost optimization as a Python Data Engineer Platforms I’ve delivered as a Python Data Engineer process 100M+ records/month, integrate 30–80+ APIs, and power real-time BI environments. 📊 Data Visualization & BI (Python gcp Data Engineer Perspective) 🔹 I bridge raw data with business decisions as a Python gcp Data Engineer 🔹 Power BI, Looker Studio & Tableau dashboards connected by Python GCP Data Engineer pipelines 🔹 Executive KPI reporting built by a Python AWS Data Engineer 🔹 Semantic layer & metric standardization in Python Data Engineer systems 🔹 Real-time reporting (<5 min latency) enabled by Python Data Engineer architecture 🔹 BI performance optimization from a Python Data Engineer point of view 🔹 Data storytelling for leadership & operations powered by Python Data Engineer workflows My solutions as a Python Data Engineer reduce manual reporting effort by up to 70-80% and significantly improve forecasting accuracy. 🧩 Recent Experience (Python Data Engineer and Machine Learning Projects) 🔹 Retail & eCommerce Data Warehousing (Python Data Engineer) Built ingestion + normalization pipelines for 120+ eCommerce sources, syncing ~500K SKUs/day into Snowflake / BigQuery using Python Data Engineer architecture. 🔹 FinTech Ingestion & Reporting Layer (Python Data Engineer ) Delivered automated pipeline pulling from 30+ sources (APIs, DBs, files), built with Python Data Engineer logic for validation, transformation, and reporting. 🔹 Government ETL & Document Processing (Python Azure Data Engineer | Data Analyst) Automated processing of 10K+ documents/day using Python Azure Data Engineer workflows and Machine Learning: extraction, classification, mapping, and database loading. 🔹 Healthcare Data Normalization & Compliance (Python AWS Data Engineer | Data Analyst) Cleaned millions of records using Python AWS Data Engineer pipelines with Machine Learning, schema mapping, PII-aware handling, and reproducible transformations. 🔹 Large-scale Cloud Migrations (Python Data Engineer | Data Analyst) Migrated legacy systems into BigQuery/Snowflake using Python Data Engineer architecture with Machine Learning, incremental loads and automated pipelines. 💻 Tech Stack (Python Data Engineer | Data Analyst Toolkit) ⚙️Languages: Python, SQL, DAX, Power Query, PySpark, Scala, Bash/Shell, JavaScript, etc.
 ⚙️Data Engineering & Processing: PySpark, dbt, Airflow, Prefect, CDC, REST & GraphQL, etc.
 ⚙️Data Warehouses & Databases: Snowflake, Databricks, BigQuery, AWS, PostgreSQL, MSSQL
 ⚙️Cloud Platforms: AWS: S3, Glue, Lambda, CloudWatch, Athena, Redshift, BigQuery, Dataflow
 ⚙️Data Modeling & Architecture: Star schema, Snowflake schema, Lakehouse architecture, etc.
 ⚙️Monitoring & Data Quality: dbt, Prometheus, Grafana, AWS CloudWatch, GCP Monitoring, etc.
 ⚙️BI & Visualization: Power BI (Desktop, Service), Tableau, Looker Studio, Metabase, etc.
 ⚙️DevOps & CI/CD: Git, GitHub, GitLab CI, Docker, Terraform, etc. 🚀 If you need automated pipelines, clean data models, and executive-level dashboards - as a Python Data Engineer and Data Analyst I can help you build a robust system from end to end. ➡️ Invite me to your job and let’s design a scalable data strategy with a Python Data Engineer leading the way. Last updated June 15, 2025

I am an experienced C/C++/C# (.NET)/Python/Java/Fortran 90 programmer. I specialize in the development of high performance cryptographic implementations , deep neural networks, desktop application development (both GUI and terminal applications), graphics programming with SDL 2.0 or SFML and OpenGL, network programming using sockets (both BSD sockets and WinSock), multi threading, system security enhancing applications and writing operating system level code for both Windows and Linux operating systems. I am deeply familiar with the Windows API as well as POSIX API, and I have extensive experience working with intricate projects that use the OpenSSL libraries, libAV (core libraries of ffmpeg), libcurl, GMP and many more! I prefer developing cross-platform code and I also have experience in using MPI (Message Passing Interface) via OpenMPI for distributed computing. I love writing efficient, elegant and portable code, that works in the most efficient way possible. I am also a fluent speaker and writer of the English language. If I take up a project, be assured that it will be done with the utmost level of perfection that will make your heart content! Please check out the heartfelt reviews from my clients to understand more about me. I hope to work with you and manifest success in your challenging projects. Thankyou very much for checking out my profile! May God Bless You :)

🚀 With over 8 years of experience as a senior software and data engineer, I’ve honed my expertise in crafting innovative solutions in software development and data engineering. 📊 My journey began with a bachelor’s degree in software engineering and a master’s degree. 🎓 Currently, I’m pursuing a PhD in computer science to fuel my passion for technology and innovation further. 💡 🐍 Throughout my career, I’ve been deeply involved in diverse Python projects, crafting efficient and scalable solutions to meet various needs. 🌐 My proficiency in Python empowers me to tackle complex challenges and deliver high-quality software solutions. 🛠️ My core skills include: • Python 🐍 • Django 🌐 • Flask 🍶 • FastAPI 🚀 • AWS ☁️ • Software Architecture 🏛️ • PostgreSQL 🐘 • Data Engineering 📊 • Databricks 🔥 • Pandas 🐼 📚 I’m a firm believer in continuous learning and constantly strive to enhance my skills to produce top-notch code and data solutions. ✨ Beyond coding, I’m an avid sports enthusiast 🏃‍♂️ and regularly engage in various sports activities to stay energized and focused. 🏋️‍♂️

I started programming as a kid and it’s been more than 20 years now. My first language was Pascal, then C/C++ and then I moved on to interpreted languages, like PHP or Python. My professional career in web programming began back in 2011: since then I have delivered dozens of web applications in PHP (Symfony, Laravel) and Python (Django), among others. I treat my experience as a responsibility: I know what works and what doesn’t and I can judge the consequences of many technological choices - that’s why I am always honest and realistic with my clients, offer my advice, and if necessary, try to dissuade them from solutions that might not work as they have envisioned. My main focus is on code quality and practicality. My ambition is to write reliable, fast, easy-to-modify code that can be written in a relatively short time. I always seek a balance between perfection and practicality in my coding (since the road to perfection is infinite and time until the deadline is not). I am a strong proponent of code that can be documented only by its contents and unit tests. I am also a fast learner. I don’t treat any framework as anything more than another tool made for convenience. When the need arises, I can learn most programming libraries and frameworks on the spot (as long as it's in a programming language I know). I always enjoy a new challenge! My technical expertise covers: - Databases: PostgreSQL, MySQL, SQLite, Oracle, MongoDB - VCS: Git, SVN, Mercurial - Issue trackers: Jira, Asana, Redmine, Trello, Harvest - Hosting: AWS, Linode, CPANEL/WHM, GoDaddy, Github Pages - Server OSes and tools: GNU/Linux (experience with most of popular distributions), Kubernetes (minikube, EKS), AWS Lambda, Apache2, Nginx (php-fpm and uwsgi), Ansible - Code quality: PHPUnit, Python unittest (also in conjunction with Django), pytest - Search: ElasticSearch, Solr - REST API development: experience in Django (REST Framework), FastAPI, Symfony, Laravel, and Node.js - 3D graphics programming: OpenGL in JS WebGL, C/C++ OpenGL libraries and PyOpenGL+pygame in Python - Others: Websockets (experience with implementation in Django, FastApi, Python in Lambda, Laravel and Ratchet). - Payment gateway integration: Paypal, Stripe, Braintree, Przelewy24 My technology stack: Backend: - PHP: Laravel, Symfony - Python: Django, FastApi - JS: Node.js Frontend: HTML, JavaScript, TypeScript, React, Angular.io and Angular.js, Vue.js, jQuery, Three.js, CSS, SASS, LESS, Tailwind, Bootstrap, AdminLTE Mobile technologies: React Native If you are looking for a reliable business partner, I have good news for you: I work with Polcode Software House - one of the top rated agencies on Upwork, located in Poland (EU). We have achieved an impressive 98% Job Success rate (with over 700,000 hours logged!). We are a team of about 150 people (developers, account managers, project managers, and graphic designers) whose daily job is problem-solving. We never leave a customer with an unfinished project: working in a team we can guarantee the project's continuity, no matter what happens. We are here to help you have your work done and finished. Please visit Polcode's portfolio and check our feedback! Looking forward to our cooperation! Best regards, Maciej Zakrzewski Senior Full Stack Python Developer Polcode Dev Team

35 years of experience in software engineering complemented by solid knowledge of computer science, mathematics and electrical engineering.

I am a Senior Full-Stack Engineer with 7+ years of production experience building SaaS platforms across fintech, AI communications, legal tech, e-commerce, and CRM. Backend stack: Python (FastAPI, Django/DRF, Flask), PostgreSQL, MongoDB, Redis, Celery, TaskIQ, RabbitMQ. Frontend: React.js, Next.js, Vue.js. Infrastructure: AWS (EC2, EBS, S3, Cognito). Key projects shipped: - Omnichannel cloud communication platform handling bulk SMS, WhatsApp, and cloud calling at scale (Django, FastAPI, Celery, Redis, NATS, RabbitMQ) - Two AI agent calling systems (FastAPI, Twilio, custom knowledge base and workflow engine) - Compliance data platform (FastAPI, PostgreSQL, S3, document processing pipeline) - Multi-role legal SaaS with AI-assisted chat (Django, React.js) - Rental station app with payment integrations (FastAPI, MongoDB, AWS, PayPlus) I work well with clients who have clear requirements and need someone who can own the backend end to end.

I help businesses build AI-powered applications, LLM integrations, and intelligent automation systems. Backed by 8+ years of production Python engineering, so they actually scale and hold up in the real world. ☑ Amongst TOP 1% Upwork talent (Expert Vetted) ☑ Top Rated Plus on Upwork ☑ 100% Job Success Rating ☑ 5-star Rating on Upwork ☑ 80% Repeat customers Hi I am Umar, with 8+ years of software engineering experience, I specialize in developing high-performance backend systems, AI integrations, automation tools, APIs, and cloud-based solutions using modern Python technologies. My expertise includes: • AI Integrations (OpenAI, Claude, Gemini, LangChain) • LLM-Powered Apps, RAG & AI Agents • Python (FastAPI, Django, Flask) • Workflow Automation & AI Agents • REST APIs & Microservices • Web Scraping & Data Processing • SaaS Application Development • PostgreSQL, MySQL, Redis • Docker, Azure, AWS, CI/CD • Background Jobs & Async Processing I focus on writing clean, maintainable, and production-ready code while ensuring scalability, security, and performance. Whether you need: ✔ AI-powered applications ✔ Business process automation ✔ Custom Python backend development ✔ API development & integrations ✔ AI chatbots & assistants ✔ Data extraction & automation tools ✔ SaaS MVP development I can help turn your idea into a reliable and scalable solution. Why clients work with me: • Clear communication • Fast and reliable delivery • Business-oriented problem solving • Long-term support & collaboration • Enterprise-level development standards Let’s build smart solutions that deliver real business value.

As a Full-Stack AI Developer and Python Backend Engineer, I specialize in building scalable web applications, AI agents and automation systems that integrate seamlessly into real-world workflows. Where I Bring the Most Value 𝐀𝐈 𝐀𝐠𝐞𝐧𝐭𝐬 & 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 - Multi-agent systems (task routing, orchestration, decision-making) - AI chatbots (context-aware, multilingual, RAG-powered) - Workflow automation using Python and tools like n8n - AI systems that handle real operations (leads, support, content, etc) 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 (𝐏𝐲𝐭𝐡𝐨𝐧) - FastAPI, Django, Flask for scalable backend systems - REST APIs and microservices architecture - Data pipelines and automation scripts - Secure, optimized, production-grade backend systems 𝐑𝐀𝐆 & 𝐋𝐋𝐌 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 - OpenAI, GPT-4, and other LLM integrations - Retrieval-Augmented Generation (Pinecone, Qdrant) - Document, audio, video, and structured data pipelines - Prompt engineering for accuracy + cost optimization 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 - React.js frontends with seamless backend integration - End to end AI powered platforms - Admin dashboards, analytics and user systems 𝐃𝐞𝐯𝐎𝐩𝐬 & 𝐃𝐞𝐩𝐥𝐨𝐲𝐦𝐞𝐧𝐭 - Docker based deployments - VPS, Hostinger setup - CI/CD pipelines for reliable releases I am available for long term contracts and work, feel free to reach out.

If your team is losing hours to broken workflows, manual data syncing, or half-built automations, I’m the developer you’re looking for. I build Python backends, AI agents, and CRM integrations that actually run in production. 5+ years. 9/9 five-star reviews. Top Rated on Upwork. What I build: ✅ AI chatbots and LLM-powered agents (OpenAI, RAG (Retrieval-Augmented Generation) , Claude, Vector Database , Pinecone , LangChain and Gemini) ✅ CRM sync middlewares (HubSpot, Salesforce, Zoho, unified lead pipelines) ✅ REST APIs and backend systems (Django, FastAPI, DRF) ✅ Web scraping and automation (Selenium, Playwright) ✅ End-to-end deployment (AWS, GCP, Docker) Core Technical Stack & Expertise: 🟢 Backend Ecosystem: Django, Django REST Framework, FastAPI, Flask, Node.js (Express) 🟢 AI & Intelligent Automation: OpenAI API, Custom LLM Agents, Live Chatbot Embeds, n8n, ChatGPT, GPT-5, Claude api, Gemini , AI automation, backend development, workflow automation. 🟢 Automation & Scraping: Advanced workflows using Selenium and Playwright 🟢 Data & Cloud: PostgreSQL, MongoDB, Supabase, Redis (Queues/Scheduling), AWS & GCP I don't just write scripts — I architect systems that save your team real hours every week. If you have a workflow that's eating time or a product idea that needs a solid backend, let's talk. I'll tell you honestly what it takes to build it right.

Businesses lose countless hours to manual work, slow reporting, and unreliable data collection. Broken scrapers, fragile automation, and non-scalable systems create ongoing operational costs. I help companies eliminate repetitive work, extract large-scale data reliably, and build automation systems that run smoothly in production — not quick scripts that fail after a few weeks. Core Services • Large-Scale Web Scraping & Data Extraction Advanced web scraping for dynamic websites, login-protected platforms, infinite scroll, pagination, and PDF data extraction. Built for stability, anti-blocking handling, and long-term reliability. • Python Business Process Automation End-to-end workflow automation that reduces manual effort in reporting, data processing, file handling, and integrations. Designed to save time and minimize human error. • Scalable Backend Development (Django & FastAPI) High-performance backend systems, REST APIs, and automation pipelines that scale with your business needs. Clean architecture, production-ready deployment. • Web Hosting, VPS Setup & Deployment Complete deployment support including VPS configuration, server optimization, Docker setup, CI/CD pipelines, and long-term system maintenance. Why Businesses Work With Me ✔ Production-grade automation systems (not fragile scripts) ✔ Focus on long-term stability and maintainability ✔ Strong experience with complex, high-volume data pipelines ✔ Clear communication and dependable delivery Proven Results ✔ 36 completed jobs with 100% Job Success ✔ Multiple long-term and repeat clients ✔ Trusted for mission-critical automation and scraping projects If your business needs reliable Python automation, scalable web scraping, or backend systems that run without constant fixes, we can discuss the right solution.