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$30/hr
100%
Job Success
$6K+ earned
Available now
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Maciek L.
has worked
.
I build full data and ML systems that help companies make faster and more accurate decisions.
Forecasting models, ETL pipelines, automated reporting and dashboards, and production-ready analytics tools. Commercial experience delivering end-to-end solutions for various companies.
I specialize in end-to-end data and ML workflows: forecasting engines, tabular ML models, automated ETL pipelines, and reporting tools that solve real business problems. I focus on clean, reliable, production-ready solutions — not academic prototypes.
Core Skills
• Python (Pandas, NumPy, Scikit-learn, TensorFlow)
• SQL, Snowflake
• Power BI, automated reporting
• APIs, Git
Specialties
• Time-series forecasting & predictive modeling
• Custom ETL automation (Python + SQL)
• Classification models for business decisioning
• KPI dashboards & analytics systems
Experience & Delivered Work
• Connectis – Supporting a large-scale financial compliance project for a major Polish
bank in the area of KYC/AML. Responsible for data analysis, system
verification, and ensuring process integrity within banking systems.
• One of the largest Crypto Wallet – Data Analyst
ETL pipelines (Python + Oracle), forecasting engines, Power BI dashboards, and high-volume
transaction analytics.
• Aesthora – Designed and built a full-face analysis system using ML to detect facial
symmetry, ratios, and proportions. Reduced image analysis time by
50% and minimized human input to final audits, boosting efficiency and
consistency.
Education
• Bachelor’s in Computer Science
• TensorFlow Developer Certificate
• Microsoft PL-300
• Google Data Analytics Professional Certificate
I work fast, communicate clearly, and deliver solutions that actually run in production.
If you need someone who can take a data/ML problem from idea to working system — I can help.
$20/hr
98%
Job Success
$100K+ earned
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Hi! I'm a Full Stack Developer who enjoys building fast, scalable, and user-friendly web applications. I work with modern technologies like React, Next.js, Node.js, TypeScript, C#/.NET, MongoDB, PostgreSQL, Supabase, AI, Lovable, replit AI, and WordPress to help startups and businesses build reliable digital products.
🏆 $100K+ earned on Upwork
✅ 55+ successfully completed projects
🤝 Trusted by startups, agencies, and growing businesses worldwide
## 💻 Tech Stack
⚛️ Frontend
* React.js
* Next.js
* TypeScript
* JavaScript (ES6+)
* Tailwind CSS
🖥️Backend
* Node.js
* Express.js
* C# / .NET
* ASP.NET Core
* REST APIs
🗄️Databases
* MongoDB
* PostgreSQL
* Supabase
* MySQL
🤖 AI & Automation
* LLM Integration
* RAG (Retrieval-Augmented Generation)
* NLP
* OpenAI & Claude APIs
* AI Chatbots
* Workflow Automation
* Lovable
* Replit AI
📰 CMS
* Payload CMS + Next.js
* Strapi
* WordPress (Custom Development & Customization)
☁️ Tools & Cloud
* Git & GitHub
* Claude AI, Cursor Pro
* Docker
* AWS
* Azure
* Vercel
## ✅ What I Can Help You Build
* 🚀 SaaS Applications
* 💼 Business Web Applications
* 📊 Admin Dashboards
* 🤖 AI-Powered Applications
* 💬 AI Chatbots & Assistants
* 🔍 RAG-Based Search Systems
* 🌐 Full Stack Web Applications
* 📱 Responsive Websites
* 🛒 WordPress Websites
* ⚡ API Development & Third-Party Integrations
* 🔄 Business Process Automation
* 🐞 Bug Fixes & Performance Optimization
* 🛠️ Ongoing Development & Maintenance
## 💬 Why Clients Work With Me
✔️ Clean, maintainable code
✔️ Clear and responsive communication
✔️ On-time delivery
✔️ Scalable, production-ready solutions
✔️ Long-term support when you need it
If you're looking for a reliable Full Stack Developer who can build modern web applications, AI-powered products, or scalable SaaS platforms, I'd love to hear about your project.
Associated with
EnsueSoft Pvt Ltd
United States
$125/hr
$100K+ earned
Available now
Offers consultations
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My name is Shaun, and I'm the founder of KBI Data, a tech consulting firm for startups.
I've developed data solutions and MVPs for more than 40 startups in a variety of industries, including energy, gaming, healthcare, biotech, and more.
I advise startups on:
* Cloud infrastructure
* Systems development
* Data infrastructure and data warehousing
* Analytics
* AI and agentic workflows
* Optimization
* Strategy
* Market research
* Product
Let's chat about your project and see if there's a fit.
Associated with
KBI Data
$20K+
earned
$17.5/hr
100%
Job Success
$2K+ earned
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I am a professional Desktop and Flutter Mobile Applications Developer with over five years of experience in software engineering. I specialize in building high-performance desktop applications using C, C++, and C# with SQL databases, as well as developing mobile applications with Flutter and Dart, integrating Firebase and Supabase for real-time functionality.
Throughout my career, I have successfully delivered numerous projects for desktop-based clients, optimizing performance, scalability, and user experience. My expertise extends to web automation, testing, and AI-based tools, ensuring robust and efficient solutions. With a strong problem-solving mindset and a passion for innovation, I am committed to delivering high-quality software tailored to client needs.
United States
$75/hr
100%
Job Success
$8K+ earned
Available now
Offers consultations
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I'm a Solution Architect and AI Consultant who helps businesses transform ideas into scalable, end-to-end solutions that improve productivity, automate processes, and drive smarter decision-making.
Whether you need business intelligence dashboards, workflow automation, AI adoption, or a complete Microsoft 365 solution, I can take your project from concept to deployment. I combine expertise in Power BI, Tableau, SQL, Python, Power Automate, SharePoint, Microsoft 365, and Generative AI to build practical solutions that solve real business challenges.
My approach goes beyond writing code or creating dashboards. I work with clients to understand their business, identify opportunities for automation and AI, design scalable architectures, and deliver solutions that users actually enjoy using. From interactive dashboards and data pipelines to AI agents, prompt libraries, document automation, SharePoint solutions, and API integrations, I focus on creating systems that are reliable, maintainable, and built for long-term success.
Whether you're looking to modernize a business process, implement AI, automate repetitive work, build executive dashboards, or develop an end-to-end solution, I provide clear communication, dependable execution, and measurable results from discovery through deployment.
United States
$60/hr
$0 earned
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SQL Server Database Administrator with 8+ years of experience designing, administering, and optimizing mission-critical database platforms. Deep expertise in Microsoft SQL Server with strong command of enterprise RDBMS architecture, performance tuning, and high-availability/disaster-recovery solutions. Proven experience leading SQL Server installations, upgrades, security hardening, and operational best practices, including clustering, log shipping, SSL implementation, Transparent Data Encryption (TDE), and column-level encryption. Highly skilled in backup and recovery strategy, access control, and compliance-driven data protection. Adept at cross-platform database administration, including configuring and troubleshooting MySQL environments, and developing complex database objects such as stored procedures, functions, and triggers. Trusted partner to application teams and stakeholders, ensuring database reliability, scalability, and security.
$50/hr
100%
Job Success
$20K+ earned
Offers consultations
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❓Are your GIS workflows slowing down your business? Contact me!
👉 I build automated GIS systems —helping organizations reduce costs, improve decision-making, and launch location-based products faster.
Invite me for an interview & I will make a demo solution for you for free.
Over the past 9+ years, I've built geospatial solutions for organizations including IBM, public health initiatives, a leading investment bank, and a high-growth AI startup. On Upwork, I've helped clients automate GIS workflows, build interactive mapping applications, and develop reliable spatial data pipelines that continue delivering value long after the project is complete.
I don't just build maps—I build software systems powered by location intelligence.
⭐ What I Can Help You Build
🗺️ GIS Automation & Spatial ETL
- Automated GIS workflows
- Python automation scripts
- Spatial ETL pipelines
- GeoPandas & Shapely processing
- Data validation and transformation
- Batch processing for large geospatial datasets
🌍 Interactive Maps & GIS Applications
- Mapbox & Leaflet web applications
- Interactive dashboards
- KML, GeoJSON, Shapefile processing
- OpenStreetMap solutions
- Territory mapping
- Custom GIS tools
📊 Spatial Analytics & Decision Support
- Location intelligence
- Site selection analysis
- Spatial reporting
- Time-series analysis
- Predictive geospatial analytics
- Data visualization
🤖 AI + GIS Solutions
- AI-powered GIS workflows
- Intelligent document processing
- OCR and spatial extraction
- Geospatial data automation
- Machine learning applications
- LLM-powered geospatial tools
☁️ Backend & Cloud
- PostGIS & PostgreSQL
- FastAPI
- REST APIs
- AWS & Google Cloud
- Docker
- Database integration
🚀 Selected Project Experience
Franchise Territory Automation
- Built an automated Python and GeoPandas workflow that generated KML territory maps, validated geometries, and streamlined territory management.
Interactive GIS Applications
- Developed web-based mapping tools and dashboards that enabled non-technical users to explore and analyze spatial data.
Geospatial Data Pipelines
- Designed scalable ETL pipelines for collecting, cleaning, transforming, and integrating large geospatial datasets from multiple sources.
AI & Document Automation
- Built automation workflows combining OCR, AI, and geospatial processing to extract structured information from complex documents.
🌐 Industries I Serve
🏡 Real Estate & PropTech
🏥 Healthcare & Public Health
🏦 Financial Services
🚚 Logistics & Transportation
🌳 Environmental & Sustainability
🏢 Enterprise Software
🚀 Technology Startups
🏆 Reviews from clients
⭐⭐⭐⭐⭐
"Caesar has been fantastic. Top notch quality work, always on time, and always looks at the bigger picture. He consistently brings valuable suggestions and demonstrates deep expertise in GeoPandas, OpenStreetMap, geospatial transformations, Python, Git, GitHub, and many other technologies."
⭐⭐⭐⭐⭐
“Caesar has extensive experience in data visualization, particularly in creating customized maps based on geographic coordinates. He communicates effectively and has a clear understanding of requirements. His code is of high quality, and he is willing to refine it repeatedly to ensure excellence. Overall, Caesar is an excellent developer and a great team player.”
📅 Availability
🕒 Available: 09:00 – 18:00 PST (GMT−8)
📩 Response time: usually within a few hours during business days.
🤝 Let’s connect
Whether you're building a GIS product, modernizing legacy GIS workflows, or exploring how AI can improve your geospatial processes, I'd be happy to discuss your project.
When you reach out, tell me:
- Your current workflow
- Your biggest technical challenge
- What success looks like
I'll recommend the most practical solution—even if that means a simpler approach than you originally envisioned.
Associated with
Renet Software Inc.
$10K+
earned
United States
$80/hr
44%
Job Success
$70K+ earned
Available now
Offers consultations
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- 6 years of PYTHON
- 4 years on AI
- 3 years on CHAT BOT [ RASA| GPT-2&3 | DialoGPT | Dialogflow | Amazon Lex
- 3 years on open cv and image/ object detection [ tensorflow
- 2 years on NLP and NER
- 2 years of experience in GOOGLE CLOUD [ vertex AI | Cloud Run | Cloud Build | Compute engine | Pub Sub
- Proficiency in SQL & NoSQL databases.
- Hard worker and available around the clock.
$50/hr
100%
Job Success
$500K+ earned
Start of list.
End of list.
Top 1%; part of the UpWork's Expert-Vetted and Top Rated Plus programs. Data Engineer and Python Expert with 18+Years
Azure Cloud, Synapse, Microsoft Fabric, PowerBI, AWS Cloud, ETL Pipelines, Azure Data Factory(ADF), Azure Function App, Python, GCP, NoSQL, MongoDB, SQL Query Optimization, Oracle 12c, SQL, PL/SQL, Unix Shell Scripting, Perl, NodeJS, Apache Airflow, MySQL, Web Development, Technical Recruitment, VBScript, JavaScript, Microsoft .NET, SSIS, ASP .NET, Advance Excel.
My 18+Years of total work experience covered following but not limited to:
ETL process for Data Warehouse using Python, SSIS and Azure Data Factory
Marketplace APIs Integration (Amazon SP-API, Amazon MWS, Walmart, eBay, Wish, Unicommerce, ChannelAdvisor API)
Exposure to Azure, AWS Cloud technology, Google Cloud Platform
Data Extraction using SQL and PL/SQL
Azure SQL, Microsoft SQL Server, Amazon Redshift, Snowflake, Transact-SQL
API integration using Python Programming
MongoDB Server, Atlas and MongoDB Compass
Database Architecture Design
Oracle 12c Query Optimization and Performance Tuning
Database Migration Solution Design
Candidate Recruitment Process
Preparing Financial Reports
Writing Technical Documents(ERD)
Application and Software Development
Microsoft .NET UI Development
SSIS Development with SQL Server 2019
Microsoft Visio Design Solutions
Project Requirement Gathering, Task Prioritization and Resource Planning
Worked as SCRUM master in Agile Projects
JIRA Board Management, Resource Allocation, Sprint Planning, Standups and Stakeholders Management
Project Tracking and Managing Documents and their versions on Confluence
Oracle Certified Associate
Microsoft .NET Certified Professional and Technology Specialist
MBA with Finance
and lots of more...!!
Dominican Republic
$25/hr
100%
Job Success
$100K+ earned
Start of list.
End of list.
I'm a Results-driven Data Engineer with expertise in Business Intelligence (BI) and Data Visualization. Proven track record of leveraging data to drive strategic decision-making and optimize business processes. I have technical skills in data extraction, transformation, and loading (ETL), database management, and data visualization tools. Adept at collaborating with cross-functional teams to deliver innovative data solutions. Committed to continuous learning and staying up-to-date with emerging trends in the field of data engineering and analytics.