SQL, Google Sheets, Looker Studio, Excel, Power BI, Python, AWS // Hello, I am an expert in working with data and I specialize in developing fully automated end-to-end dashboards and data pipelines. My skills are the following: ----------------------------------------- 📑 Google Sheets and Excel automation and data processing using highly complex dynamic array formulas for data prep and cleansing 🔵 SQL databases including design/architecture as well as developing complex custom queries for data processing and pipelining whether using a database such as Microsoft SQL Server, MySQL, PostgreSQL, or a cloud database such as Google BigQuery, or SnowFlake 📊 BI Dashboard development with Looker Studio and Power BI to gather data from multiple different data sources, and combine them together into one central dashboard. 🐍 Python automation and API development (Pandas, APIs, Postman, Webhooks, *Google Apps Script/JavaScript) ☁️ Cloud architecture, Linux servers, and function development for streaming data (GCP, AWS, Azure)

I build automated KPI dashboards and reporting systems in Looker Studio, BigQuery, Google Sheets, Apps Script, and Excel VBA. I help businesses replace manual reporting with clean dashboards that update automatically and show the metrics they need to make faster decisions. I am a Top Rated Plus freelancer with 15+ years of experience, 300+ completed projects, and 20,000+ hours on Upwork. My work focuses on KPI dashboards, reporting automation, business intelligence, data cleaning, and end-to-end dashboard systems that save clients time and improve decision-making. I can help you with: • Looker Studio / Google Data Studio dashboards • BigQuery reporting models and SQL views • Google Sheets dashboards and automation • Google Apps Script automation • Excel VBA dashboards, macros, and reporting tools • GA4, Google Ads, Search Console, CRM, sales, inventory, and marketing reports • Automated daily, weekly, and monthly reporting workflows • KPI scorecards, filters, drilldowns, and executive dashboards • Data cleaning, transformation, and dashboard-ready data models My typical workflow is simple: I review your data source, understand your KPIs, clean and structure the data, build the reporting layer, and create a dashboard that is easy to use, easy to maintain, and automatically updated. If you need a reliable expert to build or fix your dashboard, automate your reports, or integrate multiple data sources into a single, clear reporting system, I can help.

✅ 4x Microsoft Certified (PL-300, AI-900, DP-900, MS-900) | 100% Job Success | Top Rated From Wall Street analytics to AI-powered dashboards. I build BI systems that C-suite executives trust to make decisions. With an Economics degree, a Systems Engineering degree, and experience at Morgan Stanley and Moody's Analytics, I bring a rare combination: I understand both the financial logic behind the numbers and the engineering required to deliver them reliably at scale. I also led M&A analytics at Kareo (healthcare SaaS) and founded Ceteryx, a data intelligence consultancy. 𝗪𝗵𝗮𝘁 𝗜 𝗗𝗲𝗹𝗶𝘃𝗲𝗿 𝗣𝗼𝘄𝗲𝗿 𝗕𝗜 𝗗𝗮𝘀𝗵𝗯𝗼𝗮𝗿𝗱𝘀 & 𝗥𝗲𝗽𝗼𝗿𝘁𝗶𝗻𝗴: Executive KPI scorecards, financial reporting suites, operational dashboards, designed for CFOs, COOs, and board presentations. 𝗣𝗼𝘄𝗲𝗿 𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻: Power Apps for data capture + Power Automate for workflow automation + Power BI for live reporting, a fully integrated Microsoft stack. 𝗔𝗜-𝗘𝗻𝗵𝗮𝗻𝗰𝗲𝗱 𝗕𝗜 𝗦𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀: I integrate OpenAI/Claude into Power Platform workflows, automated executive summaries, anomaly detection, and natural-language data queries. 𝗖𝗥𝗠/𝗘𝗥𝗣 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀: Salesforce, HubSpot, Dynamics 365, NetSuite, QuickBooks. I connect your operational systems to Power BI for a single source of truth. 𝗗𝗮𝘁𝗮 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴: ETL pipelines (Python, Airflow, dbt), data modeling, Snowflake/PostgreSQL/Azure optimization. 𝗣𝗿𝗼𝘃𝗲𝗻 𝗜𝗺𝗽𝗮𝗰𝘁 Reduced ETL runtime 70% for a NASDAQ SaaS firm → $30K/mo in compute savings Built real-time fraud detection pipeline (99.3% accuracy) with Python & Kafka Migrated 50+ on-prem SQL databases to AWS with zero downtime Delivered CFO-grade SaaS metrics dashboards (MRR, LTV, churn) for board presentations 𝗪𝗵𝘆 𝗠𝗲 Ex-Morgan Stanley & Moody's Analytics: I speak finance fluently 4x Microsoft Certified: PL-300, AI-900, DP-900, MS-900 Founder of Ceteryx: entrepreneurial mindset, ownership mentality Fluent in English, Spanish, Italian Fast starts: most clients see first results in < 7 days Free 30-minute consultation to scope your project ⭐ Client Reviews "Built a dynamic, CFO-grade dashboard from minimal specs. Hit every deadline." "Joined disjointed data I thought impossible and delivered CXO-ready insights." "Responsive, insightful, knows the ins and outs of MS Power Platforms and OpenAI integration." 📞 Send me your data challenge: I'll blueprint a solution in 24 hours, no strings attached.

✅ TOP-RATED PLUS freelancer on UpWork ✅ Senior Power BI Developer ✅ 200+ BI Dashboards Delivered ✅ Microsoft DA-100 Certified Power BI ✅ 150+ Happy Clients Globally :) I brainstorm, develop and deliver BI DASHBOARDS & REPORTS. I specialize in assisting Mid-Sized to Large companies in building their Analytics and Automation Infrastructure. My top two priorities are "Client Satisfaction" and "On-time delivery" . Data Visualization Tools: ✅ Power BI / Power BI, DAX, M-Language, Power Query ✅ Tableau ✅ Google Data Studio I can help you with: ✅ Different Dashboard (KPI Dashboard, Sales Dashboard, Profit/Loss Dashboard). ✅ Storytelling, Presentation. ✅ Improving existing Dashboard. ✅ API integration I am a BI Consultant ( + Data Science Knowledge ) with 5+ years of industry experience and working on discrete analytics tools, integrating multiple on-premises and cloud data sources using standard, custom connectors or REST API's and publishing the dashboards to cloud service. Please reach out to me to solve Power BI, Data Visualization, and Data Analytics related Business problems. Please reach out to me for any assignment on Power BI, Microsoft PowerBI, Microsoft Power BI, SQL Server, Tableau, Data Analytics, Excel, Data Visualization, Expert, Quick Turnaround, Urgent, Data Visualization, Data Analytics. Keywords:- Microsoft Power BI, Dashboard, Report, Business Intelligence, ETL, ETL pipeline, Data Visualization, Data Analytics, Power BI Reporting, Power BI dashboards, Microsoft PowerApps, Microsoft Power Automate, Data Warehouse, Report Design and Visualization, Dashboard development, Data Scientist, Sales, Finance, Marketing, Executive, HR, Azure, NetSuite, AWS, Salesforce, QuickBooks, Xero, Zendesk, Spiro, Tableau, BI Developer, Excel, SQL, Google Analytics, Google Ads, Pardot, Facebook, Instagram

With over five years of experience as a dedicated Data Analyst, I transform messy, inconsistent datasets into clear, actionable insights so you can make data-driven decisions with confidence. What I Can Do for You: - Your Problem: Inaccurate or fragmented data makes it hard to identify valuable trends or measure performance. - My Solution: I turn raw information into meaningful patterns and strategic insights by applying meticulous data-cleaning techniques, advanced statistical analysis, and customized visualizations. - My Action: Using Python, R, SQL, Tableau, and Power BI, I’ll refine your datasets, run robust analyses, and present findings in intuitive dashboards that empower smarter decisions. Why Choose Me: - Proven Expertise: I’ve guided both academic and industry partners through complex data challenges, delivering improved forecasts, optimized strategies, and enhanced operational efficiency. - Flexible Approach: Whether you need a quick data cleanup, a detailed regression analysis, or a compelling visualization, I tailor my process to your unique objectives. - Clear Communication: Expect open dialogue, regular progress updates, and accessible reporting, ensuring you fully understand and trust the insights delivered. Ready to Unlock Insights? Let’s turn your data into a powerful decision-making tool. Message me now, and let’s get started.

I help companies turn scattered data into analytics systems that teams can actually rely on — from modern dashboards and reporting layers to scalable data infrastructure and operational analytics. Over the past 5+ years, I’ve worked across SaaS, E-commerce, Finance, and Operations, helping companies build: • self-service analytics • executive reporting • ETL pipelines • anomaly detection systems • data warehouses • and scalable BI environments My focus is not just visualization — it’s building analytics ecosystems that make data easier to trust, easier to maintain, and genuinely useful for decision-making. ❤️ The part I care about most? Connecting clean infrastructure with actionable reporting. A dashboard is only useful when the underlying data model, business logic, and pipelines are reliable. What I usually help with: • Data analytics & business intelligence • Tableau, Power BI, Looker, Metabase, Microsoft Fabric • Data warehouse design & analytics architecture • ETL/ELT pipelines and reporting automation • KPI systems and operational reporting • Product, finance, and revenue analytics • Self-service analytics environments • Data quality validation and anomaly detection • Dashboard redesigns and reporting optimization Tools & Technologies: • SQL, Python • Snowflake, BigQuery, PostgreSQL • dbt, Airflow, Fivetran • Tableau, Power BI, Looker Studio • APIs, cloud data platforms, automation workflows A few things I’m proud of: • Built analytics systems used daily by 5000+ users • Worked with datasets from thousands to billions of rows • Automated reporting workflows saving teams 20+ hours weekly • Designed reporting layers and data platforms for fast-growing SaaS and E-commerce companies • Led BI migrations and large reporting restructuring projects I enjoy projects where analytics needs to scale properly — whether that means redesigning reporting architecture, cleaning up unreliable dashboards, improving data quality, or building a modern BI stack from scratch. Good analytics should not just “look nice.” It should help teams move faster, reduce operational chaos, and make decisions with confidence. Data never lies.

✔️Expert-Vetted top 1% of Upwork freelancers ✔️Satisfied clients ✔️Fixed price ✔️Unlimited revisions ✔️ Useful insights ✔️Clear explanations ✔️Quality code SEND ME AN UPWORK MESSAGE TO GET A FREE QUOTE ➡️Send me a sample of your data to get an analysis plan and price ➡️Or if you prefer to talk, find out how I can help you with a free 20-minute discovery call SERVICES STATISTICS: 🔹Descriptive statistics 🔹Inferential statistics 🔹Statistical modelling 🔹Hypothesis testing DATA ANALYSIS: 🔹Exploratory data analysis 🔹Data preparation and cleaning 🔹Insight generation 🔹Survey data 🔹Machine learning models 🔹Predictive analytics 🔹Summary analysis and visualization (graphs, reports, presentations, dashboards) CONSULTING & REVIEW: 🔹Review statistical or machine learning models 🔹Performance assessment of existing data science models or products 🔹Develop data science training curriculum and materials 🔹Review or develop data science products, algorithms, processes 🔹Review academic research methods, papers ABOUT ME 🔹Full time freelancer: helping individuals and businesses with their data science problems 🔹Bridge between business and data: integrating your domain knowledge with my data science expertise to produce actionable results 🔹The right tool for your problem: R, Python, SQL, Microsoft Excel, Google Sheets, Snowflake, … 🔹15 years of data science experience: across large UK and US companies and academia 🔹Professionally qualified: Certified Advanced Data Science Professional

Senior Data Engineer and AI Engineer with 15+ years in data engineering, AI engineering, and cloud data platforms. I build production data pipelines, ETL workflows, LLM and RAG systems, and machine learning infrastructure on AWS, GCP, Azure, Snowflake, Databricks, and Apache Spark. Most of my data engineering work is end to end. I take a messy data problem, or an AI feature that "almost works," and turn it into something reliable that runs in production without someone babysitting it. After 15+ years as a data engineer, you learn the hard part is rarely the model or the framework. It's the data, the edge cases, the pipelines, and keeping the system maintainable once you've handed it over. As an AI engineer I treat LLM and RAG work the same way: take a prototype that almost holds together and make it a production AI system that survives real traffic, real users, and real data. Recent data engineering and AI engineering projects: - An AI inbound phone system built on Twilio with OpenAI Whisper and GPT-4, handling real-time voice intake and call routing. - Enterprise Power BI data models for healthcare and financial reporting, around 30 tables and 40+ DAX measures, including IFRS 9 staging, RAROC, and NIM trends. - HL7 FHIR R4 integrations with Epic, Cerner, and Athenahealth for a clinical AI platform. - Cut LLM inference cost on a high-volume voice product by 25% by reworking how it used the OpenAI Realtime API and its per-turn token replay. Data engineering: Apache Spark, PySpark, dbt, Apache Airflow, ETL and ELT pipelines, data warehousing, data modeling, Snowflake, BigQuery, Redshift, Databricks, Delta Lake, Kafka, Kinesis, Fivetran. AI engineering and machine learning: OpenAI GPT-4o, Claude, Gemini, LangChain, LlamaIndex, RAG pipelines, AI agents, prompt engineering, vector search (Pinecone, Weaviate, pgvector), PyTorch, TensorFlow, scikit-learn, MLflow, model deployment. Cloud and DevOps: AWS (Glue, EMR, Lambda, Redshift, SageMaker, Athena), GCP (BigQuery, Dataflow, Vertex AI), Azure (Synapse, Data Factory, Azure ML), Terraform, Docker, Kubernetes, GitHub Actions. Automation and integration: n8n, Make, Power Automate, REST and GraphQL APIs. Governance and compliance: GDPR, HIPAA, SOC 2, RBAC, PII masking, encryption, data lineage. Languages: Python, SQL, Scala, PySpark, FastAPI, Flask. How I work: I'd rather ask the right questions up front than build the wrong thing quickly. I'll tell you when something is a bad idea, give you timelines I can keep, and leave you with code and documentation your own team can maintain. I've delivered data engineering and AI engineering projects for startups and enterprises across the US, Europe, and Asia. If you're looking to hire a data engineer or AI engineer who can own the work end to end, from raw data pipeline to production AI system, I'm available now. Tell me what you're building and I'll give you a straight answer on how I'd approach it.

I’m a Data Scientist and AI/ML & AI Automation specialist helping organizations turn complex data into measurable business outcomes through applied AI/ML, predictive modeling, and end-to-end machine learning systems. I hold a Bachelor’s degree in Computer Science and a Master’s in Data Science focused on artificial intelligence and machine learning, supported by hands-on experience building production-grade AI, ML automation, and MLOps pipelines using Python, SQL, and modern data platforms. Proven Enterprise Delivery • Omnichannel Retail & E-commerce Analytics: Unified Shopify, advertising platforms, GA4, and POS systems into a single analytics layer, enabling centralized visibility across sales, marketing performance, and inventory optimization. • Logistics & Fulfillment Automation: Delivered AI-driven automation and ETL pipelines for operational reporting, enabling near–real-time insights across logistics and fulfillment workflows. • B2B SaaS / BI Product (Applied AI/ML): Architected and built the core machine learning engine embedding predictive analytics and predictive modeling directly into a production BI platform. • Government & Public Sector (Enterprise Data Architecture): Designed a national-scale data strategy, analytics architecture, governance framework, and API monetization roadmap. • Banking & Financial Services: Built enterprise data warehouses and data engineering pipelines consolidating 10+ systems, supporting analytics, BI, and downstream machine learning use cases. What I Help Clients With • Applied AI/ML & data science solutions aligned to business use cases • Predictive analytics, predictive modeling, and forecasting • ML automation, MLOps, and production deployment • Feature engineering, data engineering, and ETL pipelines • Business intelligence and analytics that support AI-driven decisions • Translating complex AI and ML outputs into clear, actionable insights 𝗦𝗸𝗶𝗹𝗹𝘀 | 𝗧𝗼𝗼𝗹𝘀 | 𝗦𝘁𝗮𝗰𝗸 Machine Learning & Data Science • Machine Learning • Predictive Modeling • Supervised Learning • Unsupervised Learning • Forecasting • Exploratory Data Analysis • Feature Engineering • Model Evaluation Data Engineering & Platforms • Data Engineering • Data Warehousing • ETL Pipelines • SQL • PySpark • Azure Data Lake • Azure Databricks MLOps & Deployment • MLOps • Azure Machine Learning • Model Deployment • ML Pipelines • Production ML Systems Business Intelligence & Analytics • Business Intelligence • Tableau • Power BI • Metabase • Google Data Studio • Dashboard Development Programming & Databases • Python • R • MySQL • Azure SQL • Vertica Marketing & Product Analytics • Google Analytics • Product Analytics • Digital Analytics • Conversion Tracking Let’s connect to discuss how I can help design and deliver your data, analytics, or AI initiatives. Best,

🚀 Microsoft Certified BI Developer / Data Analyst — Fast and Effective Data Solutions My name is Denys, and I specialize in building dashboards, automated reports, and templates using Power BI, Excel, Google Sheets and Superset. My goal is to help businesses work seamlessly with data, make informed decisions, and save time. What I Can Help You With: 1. Dashboards in Power BI, Excel, Google Sheets or Superset - Creating interactive dashboards for monitoring sales, marketing campaigns, or operational efficiency. - Setting up automated data refresh. - Implementing RLS to protect sensitive information. - Advanced data visualization 2. Developing Templates in Excel and Google Sheets - Templates for automated reporting: weekly, monthly, or quarterly reports. - Building custom calculation sheets for forecasting, budgeting, or performance evaluation. - Designing interactive control elements (filters, dynamic charts) for easy data analysis. - Automating data processing using Power Query and built-in functions. 3. Optimizing and Scaling Your BI Solutions - Assessing and enhancing existing Power BI dashboards or Excel/Google Sheets templates. - Adding new features: interactive parameters, complex DAX formulas, or customized KPIs. - Creating centralized reports to consolidate data from multiple sources. 4. Consulting and Training - Reviewing your current reporting system and providing improvement recommendations. - Training your team on Power BI, Excel, or Google Sheets to increase independence. - Implementing BI best practices to build reliable and efficient analytical solutions. - Offering ongoing support and consulting after project completion. 5. Any custom solutions with my Tech Stack Technical Skills and Tools: Visualization and Reporting Platforms - Power BI: Power Query Editor, DAX measures, Power Pivot, Power BI Service, Dataflows, Incremental Refresh, Field Parameters, RLS, Power BI Gateway - Superset: Designing and deploying charts and dashboards - Excel & Google Sheets: Advanced formulas, PivotTables, PivotCharts, Smart Tables, Power Query, DAX measures, data validation, and automation Data Collection and Analysis - SQL (DQL, DDL, DML): Aggregate functions, subqueries, JOIN operations, grouping, filtering, data transformation, creating views - API Integrations: Extracting data from external systems - Power Apps: Dataverse, Canvas Apps, Model-Driven Apps, UI customization, error handling Data Automation and Processing - Power Query: Automating ETL processes, data cleaning, and transformation in Power BI and Excel - DAX Studio & Tabular Editor: Advanced DAX debugging and optimization - Azure Data Studio: Managing and querying databases Additional Tools - Best Practices Analyzer: Ensuring efficient and reliable of data model Why Choose Me? - Clear understanding of your needs: I deliver solutions that address real business challenges. - Efficiency: I optimize processes to save you time and resources. - Reliability: Always meeting deadlines and ensuring high-quality work. - Flexibility: I handle both large-scale projects and quick tasks. Ready to enhance your reporting and data analysis? Click "Invite" to discuss your project and get BI solutions that transform the way you work with data! 🌐 **Keywords:** Excel, Google Sheets, Data Studio, Power BI, E-commerce Reporting, Automation, Dashboards, Data Analytics, Insights, SQL, Python, Tableau, Data Visualization, Predictive Analytics, Data Mining, Big Data, Business Intelligence, Statistical Analysis, Data Cleaning, Data Manipulation, Data Modeling, Data Integration, Data Warehousing, Database Management, KPI Tracking, Analysis, Customer Analysis, Market Research, Google Analytics, A/B Testing, Risk Analysis, Financial Modeling, Project Management, Optimization Techniques, CRM Data Analysis, Web Analytics, Sentiment Analysis, Data Governance, Report Writing, Data Quality, Advanced Excel, Data Security, Scripting, User Behavior Analysis, Pattern Recognition, Data Strategy, ETL Processes, Data Extraction, Data Transformation, Data Loading, BI Reporting, OLAP, Data Architecture, Data Science, SQL Server, Data Engineering, Data Compliance, Data Privacy, Dimensional Modeling, Business Analysis, Requirements Gathering, Performance Metrics, Data Analytics Tools, Data Warehouse Design, OLTP, QlikView, DataOps, Business Process Analysis, BI Solutions, Data Literacy, User Experience Analysis, Predictive Modeling, Cluster Analysis, Data, Data Lakes, Real-time Analytics, Interactive Dashboards, Reporting Tools, KPI Dashboards, Financial Reporting, Custom Reports, Automated Reporting, Executive Dashboards, Sales Reporting, Performance Dashboards, Operational Reports, Visualization Tools, Scorecards, Dashboard Design, Reporting Standards, Ad-hoc Reporting, Data Storytelling, Dashboard Metrics, Analytical Reports, Reporting Automation, Dashboard Customization, Data Reporting, Reporting Analysis.