Hey, happy to meet you on my profile! 😊 My name is Irina, and I’m proud to be a part of PettersonApps - a fast-growing software development company with over 10 years of experience delivering web, mobile, OTT, and custom digital solutions for clients worldwide. Over the years, we’ve partnered with startups, scale-ups, and enterprise companies across different industries, helping them build, improve, and scale their products with reliable development teams and transparent communication. Today, our team includes 150+ specialists covering the full product development cycle - from discovery and UI/UX design to development, QA, release, and ongoing support. Our expertise includes: ✅ Mobile app development (iOS, Android, Flutter, React Native) ✅ Web development (React, Next.js, Node.js, PHP, etc.) ✅ OTT platforms (Roku, tvOS, Android TV, Apple TV) ✅ AI/ML-powered solutions ✅ Unity development (AR/VR experiences & games) ✅ UI/UX design ✅ QA & testing support ✅ Dedicated project management and delivery support Whether you need support at a specific development stage or a full cross-functional team to take care of your project end-to-end, we’d be glad to help. I always aim to build long-term, transparent partnerships and make the collaboration process smooth and comfortable for clients. Feel free to reach out. I’d love to discuss your requests/requirements and answer any questions 📩

⭐ Data Transformation & BI Expert | Alteryx • DOMO • Power BI • Tableau • SQL • AWS • Python With 12+ years of experience, I help companies turn raw and messy data into automated, scalable, and insight-driven solutions. I specialize in end-to-end analytics—from data extraction and ETL to visual dashboards and advanced reporting. I work with startups, agencies, and enterprises to build reliable, maintainable, and high-performing data systems using Alteryx, DOMO, Power BI, Tableau, AWS, SQL Server Management Studio, and Python. 🔧 Core Specializations ETL / Data Automation Alteryx Designer (data cleaning, blending, workflows, automation) DOMO ETL (Magic ETL, dataflows, connectors) Power Query & M Language Automated pipelines via AWS and SQL Server Agent Business Intelligence & Dashboards Power BI (DAX, data modeling, row-level security, dashboards) Tableau (calculated fields, LODs, storytelling dashboards) DOMO Dashboards (Cards, Analyzer, alerts, governance) KPI frameworks, executive scorecards, operational reports Databases & Data Engineering SQL Server Management Studio (SSMS) Advanced SQL: CTEs, window functions, procedures, indexing AWS (RDS, Redshift, S3, Glue basics) Data modeling • optimization • large dataset handling Programming & Automation Python (pandas, NumPy, automation scripts) API integration & data fetching Predictive analytics & ML (optional add-on for clients) 🚀 What I Deliver Clean, reliable, and automated data pipelines Well-structured data models optimized for BI Modern, visually compelling dashboards End-to-end analytics workflows using Alteryx / DOMO / Power BI / Tableau Fast turnaround + continuous support Clear documentation and training if needed Client Feedback Automated Business Intelligence ⭐⭐⭐⭐⭐ "Kshitiz was a great partner on our data science and analytics projects. He built insightful dashboards in Domo that provided clear and actionable business intelligence. His technical skills, problem-solving approach, and responsiveness made a real impact. Highly recommend working with him!" Tableau Developer ⭐⭐⭐⭐⭐ "We had a very positive experience working with Kshitiz. He is very hardworking, flexible, and able to grasp the requirements quickly. He has excellent Tableau development experience and expertise. It was great to leverage his skills on our project." 💎 Why Clients Choose Me 12+ years of analytics and BI experience Top Rated Plus performance Strong mix of BI + ETL + engineering + automation Ability to own projects independently end-to-end Long-term mindset with exceptional communication

Leadership: Have led a team of statisticians in supporting statistical activities in 2 therapeutic area portfolios and programmers supporting regulatory reporting for over 100 clinical trials Technical: Strong experience in providing lead statistical support for regulatory activities such as FDA Panel meetings, in-person FDA meetings, PMA submissions, FDA study design conference calls, FDA deficiency responses and regulatory report submissions Programming: SAS (10+ years) and experience using R

🏆 EXPERT-VETTED TOP 1% ON UPWORK |⭐ 5-Star Ratings | Data Analytics and Predictive Modeling|💎MASTER/PHD THESIS Help |✅Statistics, Panel Data, Time series Econometrics |✅ R, PYTHON, SAS, Tableau, Power BI | ✅Data Science, Machine Learning Models | ✅STATA Master, Large Survey Data and Regression Analysis, Economic Policy Evaluation, Predictive Financial Modeling | 🏆PhD and 20 years of experience. ABOUT ME: 🏆 EXPERT-VETTED and TOP RATED PLUS status (TOP 1% on UPWORK) 🥇20 years of working experience with large corporations and institutions (Amazon, the World Bank, International Financial Corporation, University of Pennsylvania) 🎓PhD/Professor in Econometrics/Statistics/Data Science 💎Provide effective help for MASTER/PHD THESIS With proven tracked records of success in Upwork (Expert Vetted Top 1% and Top Rated Plus), overwhelmingly positive feedback with 5* ratings, my PhD and 20 years of experience, I can definitely help you bring out the highest quality, great results for your project and achieve your business goals. I have over 20 years of experience in empirical research, statistical analysis, econometric modeling, data science, machine learning models, data analysis (panel data analysis and time series analysis, complex survey design and analysis), data visualization, storytelling, and project management. I enjoy creating dashboards of data analytics to provide data insights, data trend, meaningful graphs, statistical analysis, story-telling summary that serves as key benchmark to influence business decision. Moreover, I also provide robust statistical evidence, regression/correlation analysis, machine learning predictive models to provide supportive and significant results for business projects. I also help clients understand different statistical techniques, regression techniques, learn excellent statistical language including STATA, SAS, R, and Python to make your life easier. My previous projects on machine learning and econometric modeling include the followings but not limited to: - Data Analysis, Large Survey Data Analytics and Data Visualization. - Linear regression with panel data and time series data. - Forecasting model for time series analysis - Financial modeling such as stock returns, cryptocurrency price prediction, financial indices and financial performance prediction. - Machine Learning models: Random forest, decision trees, KNN, neural network,... - Logistic models, multinomial logit models, ordered logit models. - Economics research, market research, house price, mortgage default prediction, - Program evaluation using different methods such as difference in difference, propensity score matching, instrument variables, fixed effects, regression discontinuity design. I am happy to share my knowledge on machine learning modeling as well as quantitative and analytical skills to help you succeed in your project. In addition, with my experience in participating and presenting in thousands of academic and industry conferences, supervising and guiding hundreds of college and graduate students in their thesis/dissertation, I am very confident that I can help you make a difference in your project and bring out the highest quality and great results for your Master or PhD's thesis/dissertation project. I can also provide statistical advice and statistical analysis including: - Descriptive Statistics. - Bi-variate analyses such as t-tests, correlations, chi-square tests and non-parametric tests for normal and non-normal data. - Multivariate analyses such as ANOVA, MANOVA, LDA, PCA and factoring analysis, regression analysis (see econometric models above). - Review and interpret statistical output, set up the appropriate hypothesis testing and write up conclusion and policy recommendation. - Tutoring Statistics, Math and Econometric courses: including both introduction and advanced courses. I have experience with different types of data including: - Survey data (household, market research, firm/business/country data, house price, loan performance, accounting, finance, health, labor and income, etc.) - Panel data - Time series data I help clients put together and analyze different types of survey data, panel and time series data, getting the data insights, build data trend and data stories with meaningful graphs and great visualization. With proven tracked records of success in Upwork (Expert Vetted Top 1% and Top rated), overwhelmingly positive feedback with 5* ratings, my PhD and 20 years of experience, I can definitely help you bring out the highest quality, great results for your project and achieve your business goals. Looking forward to working with you soon, Dr. Victoria

Do you find yourself frustrated by the complexity of data integration and the lack of in-house expertise? Have a huge amount of transactional data but facing challenges in identifying key metrics and visualizing data effectively? Looking to save time through automation? Look no further! I have helped clients save 10,000+ hours of manual work, boosted efficiency by 5X to 10X, and taken data-driven decisions through powerful insights. Here are some of the results my clients are getting: 🏅“fantastic job- he handled everything with ease…” – transformed reporting landscape to Power BI, reducing report generation time by 50%. Trained 50 employees,60% increase in data analysis proficiency. 🏅”great job- quality work on time , professional and punctual…” - Dramatically enhanced data preparation efficiency by transforming a labor-intensive 3-day process into a lightning-fast 1-hour refresh 🏅“would recommend his services to anyone!”- Collaborated with L'Oreal to deliver transformative BI solutions and Power BI dashboards, resulting in a remarkable reduction of 10,000+ manual hours With over 10 years of experience as a BI developer and Data Visualization Expert, I possess end-to-end expertise in Data Warehousing, ETL, Data Modeling, Project Management, Implementation, and Training, making me a specialist in delivering comprehensive BI solutions. Proven track record of successfully integrating into teams, fostering creativity, and driving impactful results. I have expert level skills in all advance features of Power BI. With a wealth of global experience, I have had the privilege of serving renowned clients like: ⭐L'Oreal ⭐Aruba Networks ⭐Stanford Medical School ⭐Ito En ⭐Mauser ⭐Producer Dairy We may be a great fit if you are thinking: 🔑”Excessive time and effort wasted in manual data entry and processing- I NEED automation” 🔑”Lack of data integration and synchronization causing inefficiencies and duplication” 🔑”We have great deal of data - I need data-driven revenue maximization” 🔑”Inaccurate datasets leading to unreliable insights and outcomes” 🔑”Limited scalability of existing data infrastructure, unable to handle increasing data volumes” I have successfully connected more than 200+ Power BI reports and dashboards to multiple backend databases, leveraging my expertise in creating dynamic and interconnected dashboards for comprehensive data analysis. Working with me, you will: 🎉Automate manual processes, saving you SIGNIFICANT time and effort, so you can focus on other high-value tasks. 🎉Unleash powerful data insights for informed, data-driven decisions that propel your business forward. 🎉Get accurate and reliable data, ensuring data integrity for reliable analysis 🎉Tap into accurate and reliable insights, BOOSTING your business growth with confidence My background in numbers: ✅10+ years of industrial experience as a BI developer and Data Visualization Expert ✅ Delivered more than 500+ Dashboards and reports ✅ Streamlined ETL processes, reducing data processing time by 40% ✅Trained more than 70+ personnel - leading to a 60% increase in data analysis proficiency and actionable insights. Data Services: 🔹Power BI Dashboard Development 🔹Data Modeling, ETL Processing, Data Warehousing 🔹Process and Analytical Modeling Industries I served: 🔹FMCG 🔹Technology and Software 🔹Logistics and Supply Chain 🔹E-commerce and Retail 🔹Warehousing and Distribution 🔹Defense 🔹Finance and Banking Database and Tools: ✔️ Microsoft stack: Microsoft Power BI, Azure, Office 365 ,Power BI Report Builder ,Excel ✔️Relational databases: SQL Server, MySQL, PostgreSQL, Access,SAP,Salesforce ✔️Programming languages:Python, VBA, DAX, SQL SOUND LIKE A FIT? NEXT STEPS: Click the green ‘Invite to Job’ button in the top right-hand corner, send me a message and let’s organize a call! ✋🏼We want to build your dashboard! We are focused on designing dashboards that are aesthetically pleasing, functional and meet the needs of your organization. As an experienced Data Visualization, and BI Solutions Expert with over 9 years of corporate experience, I have worked with many large and international enterprises to help extract insights from their data and improve their operations. I can provide an end-to-end BI solution including Data Warehousing, ETL, Data Modeling, Project Management, Implementation and Training. As an Engineer with business operations experience, I bring a diverse perspective from working across multiple industries and all levels of an organization. I pride myself in my ability to integrate into your team, promote creative solutions and drive results. THE PROCESS: Gather Requirements 🡆 Build Prototype 🡆 Iterate until Satisfied! I believe in a simple, iterative approach that focuses on delivering results a

I'm a certified Data Analyst, Biostatistician, Statistical Modeler and Researcher with experience in Python, SQL, R-studio, Power BI, IBM SPSS, STATA, SAS, and Excel. I handle average to demanding projects involving Research, Statistical analysis, Data Analytics, Data Science and Machine Learning. A complete project monitoring and management from the start until it's done. I will use Latex for professional document/thesis writing. Quick and regular responses.

Are you looking for a seasoned healthcare professional with 15+ years of industry experience? Look no further! I bring a wealth of expertise to the table, spanning various roles in the healthcare IT industry, including Website and mobile Application Development, Project Management, Integration, Consultation, Digital Marketing, and Compliance. My Expertise  Web & Mobile Solution • Telehealth/Telemedicine Virtual Appointment Booking Solutions & mHealth Apps • EMR, EHR, PHI, Medical Billing Solutions for Patient Healthcare/Medical Records • HealthKit Integration for Fitness Apps • Healthcare device and smartwatch integration for vitals extraction • Healthcare Marketplace Management Solutions • Doctor-patient apps and Websites • Medical Job Portals • Staff Management Software, and more! • Chat-bot, video call, SMS, email service integration  Healthcare Consulting & Subject Matter Expertise: • HIPAA Compliance & Standards • HL7 V2, HL7 FHIR, SMART on FHIR, and NCPDP Standards • EHR & EMR Integration (EPIC, Cerner) • Healthcare Device & HealthKit Integration • Consulting on Telemedicine, EMR/EHR, HL7, FHIR, EDI, HIE, CCDA, HIPAA, Mirth Connect, Billing, Benefit Plan Management, Eligibility Verification, Claim Scrubbing • Start-Up and Large Organization Consulting for HIPAA Compliance • Security Risk Assessment and Remediation for Healthcare Applications • Mirth Connect Configuration and Channel Customization • Mirth Connect-Based FHIR Integration • Lab Integrations (Uni-Directional, Bi-Directional) • Integration with PopHealth, Epic, Cerner • Billing Management and EDI Processing Systems • DICOM Viewer & PACS Solutions  Digital Marketing Services: • SEO: Backlinking, Website SEO Auditing, Keyword Research • On-Page & Off-Page Optimization • Google Analytics • SMO & SMM: Social Media Platform Management • Content Writing & Editing • Blog Writing • Email/Testimonial/Article Writing  Bubble.io Expertise: • API Integration • Payment Method Setup • Responsive Design • UX/UI Design • Project Management I have also updated with emerging technologies like AI, chat-bot integration, and process automation. I've worked on numerous Bubble.io projects, mastering backend workflows, API integration, SQL Database connectors, Stripe payment integration, custom plugins, and third-party APIs. Our Global Impact: I've proven my healthcare domain expertise across the US, Canada, Australia, Europe, South America, and the UAE healthcare industries. Let's connect and transform your vision into a reality! Add value to your dream product with our expertise. Contact us today!

As a statistician and data analyst, I know exactly how you can use data optimally within your business. Based on your objectives, we will plan to reach the right insight. I am available for: Statistical analysis for academic projects. Data science (prediction models, classification). Data analysis and data mining, web scraping of data Data visualization (infographics, dashboards) Advice and coaching data projects Presentations (storytelling, how to present data, how do other businesses use data?) I can help you businesses, agencies, founders, etc. Make sense of data, and build the reporting and insights you want/need. My particular interest is public health, survey data analysis, biostatistics, psychology, ecometrics and medical research. Skills: Expert in using IBM SPSS, SAS, R Studio, python, STATA and Excel for the following missions. - Data mining, and data cleaning. Expert in Statistical Analysis; Correlation analysis, Regression analysis, ANOVA and MANOVA testing, Survival analysis, Factor analysis (EFA and CFA), Cluster analysis and other tests (parametric and non-parametric). Interpretations and writing high quality reports. - Tables, graphs and interpretations in APA format for dissertations and thesis Sample size calculations using SPSS and R. -Statistical modeling - Designing researches and clinical trials as well. Since I believe that good communication is crucial to gaining good outcomes, I am 100% available through Upwork application, please feel free to contact me directly through messages

🏆 Top Rated Upwork Professional | 16+ Years in Data & Analytics ✅Database Administrator ✅Business Intelligence Developer ✅SQL Subject Matter Expert ✅Microsoft Certified SQL Server Database Developer ✅Certified in Data Scientist. ✅ PostgreSQL✅ Microsoft Power BI ✅ Azure Solution Architect 🎯I will make every effort to understand your requirements and provide exactly what you require while staying within the agreed-upon timeframe. ⚡I have 12 years of experience with SQL Server database service, ranging from basic to advanced. With demonstrated skills in various fields, my curricular and technical accomplishments represent my reputation for hard work, honesty, and providing a value-added benefit to our customers. 🎯I have work with fortune clients, and more than 25 critical projects are running live in the production environment. ⚡Building long-term relationships with my clients are vital to me. ⚡I'm flexible with my working hours and will be delighted to discuss your proposal with you as soon as possible. ⚡Also specialized in SQL Server database administration and extensive experience in: SQL Server 2014 and 2016 Upgrades SQL Server 7, 2000, 2005, 2008, 2008R, 2012,2014 Support Data Type Conversions Deprecation of SQL Commands Custom Scripts for Health Checks, Data Archiving, Table Maintenance Customized Backup Routines Database Refreshes High Availability Job Failure Detection and Recovery Project Execution/DDL Rollout Release Management SAN Implementation SQL Server BI Replication SQL Server SSIS Clustering Query Tuning Optimal SQL Server Configuration OS Troubleshooting SQL Server Reporting Services Analysis Services DTS to SSIS Conversion Performance Tuning T-SQL SQL Server Replication 💡Excellent Knowledge of SQL / R / Python / Machine learning 💡3+ years of experience in Hadoop, HIVE, Spark 💡Proficient at creating high-level design after studying current and required database design and low-level design based on the high-level design with in-depth new database design. 💡Worked on Database Designing from Scratch for New Application by Understanding the requirement and Proficient in building CDM, LDM & PDM. 💡Exceptional communication, collaboration & team-building skills to grasp new technical concepts quickly and productively utilize same. 💡Possess strong communication, relationship management, and coordination, analytical and problem-solving skills 💡Proficiency in Natural Language Processing. 💡Proficiency in data science toolkits, such as R, Weka, NumPy, Matplotlib, pandas, sklearn, etc., and capability in developing packages in R, Python, SAS 💡Experience with NoSQL databases, such as MongoDB, HBase 💡Experience with data visualization tools using ggplot, etc. 💡Conceptual understanding of statistics, such as distributions, hypothesis testing, regression, classification clustering Association, etc.

🏆 Top Rated AI Expert | Scalable LLM, RAG & Voice AI | Data & BI ⭐ Most AI projects die between demo and production. I deliver production-ready solutions with honest scoping before budget moves. I don't just build models; I build systems that scale, secure, and save costs. 💬 HOW I WORK Free 30-minute consultation: I map out how AI applies to your workflow, prioritizing process simplification over immediate automation. Cost-Control Architecture: I prevent token costs from scaling using rolling summaries, model routing, prompt caching, and server-side daily usage limits. Quality Guarantee: Industrial-grade code, fully documented. Bugs in delivered scope fixed at no extra cost. Milestone Validation: You review and approve each milestone before payment releases. Transparent Communication: Weekly updates and clear progress tracking throughout the project. LIVE DEMOS & PORTFOLIO Access credentials available via direct message or Upwork Portfolio section. Document AI (RAG): Instant answers from PDFs, contracts, and manuals with source citations. Conversational Voice AI: 24/7 call handling, scheduling, and CRM sync. AI Stock Analysis: Automated summaries and investment recommendations. Clinical Trial Matching: HIPAA-compliant patient data deidentification and trial matching. Computer Vision: Defect grading, object detection, and floor plan measurement. Synthetic Data: Scalable data generation for testing and training. Lead Intelligence: Agentic workflows for lead qualification and outreach. 💬 Send the use case, get a straight read: feasible or not, how long, what it costs. Then it is built to criteria you approve. 🔧 SERVICES | Production Ready AI, Built and Shipped for Startups & Enterprises Voice AI & Conversational Agents: 24/7 call handling, appointment booking, CRM sync, and seamless human handoff. Low-latency pipelines with context retention. (Vapi, Retell, Twilio, ElevenLabs, Deepgram). AI Agents & Automation: Connect CRM, spreadsheets, and tools into autonomous workflows. Agents verify identity before booking/refunding. (n8n, Make, LangChain, CrewAI). Generative AI & LLM Apps: Custom chatbots for web/Slack/WhatsApp that stay on your data and return clean JSON. Guardrails prevent hallucinations. (OpenAI, Claude, Llama, FastAPI). RAG & Enterprise Search: Chat with PDFs/contracts with source citations; accurate search past 1.5M documents. Hybrid search with re-ranking. (LlamaIndex, pgvector, Elasticsearch). NLP, OCR & Document Intelligence: Extract data from invoices/contracts into Excel/CSV/JSON. Low-confidence values flagged for review. (Google Doc AI, Tesseract, spaCy). Data Pipelines: Automated scraping, cleaning, and organization of files (including SEC EDGAR/SEDAR). Scheduled pipelines with duplicate removal. (Python, Airflow, Scrapy). Business Intelligence & Analytics: Dashboards, KPI tracking, and automated reporting. Turn raw data into actionable insights with clear visualizations. (Power BI, Tableau, Looker, SQL, dbt). Machine Learning: Forecasting, churn prediction, fraud detection. Trained on messy real data with actionable benchmark reports. (Scikit-Learn, XGBoost, R). Healthcare & Clinical AI: Patient data deidentification, lab code mapping, trial matching. HIPAA-compliant deployment. (i2b2, OMOP, SQL). Computer Vision: Object detection, defect grading, image similarity. Models trained on real-world images for live feeds. (YOLO, PyTorch, OpenCV). Generative AI & Media: AI avatar/video at scale (spreadsheet + script → finished video). Consistent character identity and lip sync. (Synthesia, Tavus, Stable Diffusion). 🛠️ TECH STACK Core: Python, JavaScript, TypeScript, React, Node.js, SQL, R, Docker, AWS, Azure, GCP, Kubernetes. LLMs & Agents: GPT-4, MCP, AutoGen, Amazon Bedrock, Ollama, Gemini, DeepSeek, Groq, Qwen, Semantic Kernel. RAG & Search: Pinecone, Weaviate, ChromaDB, Haystack, BM25, RAGAS, OpenAI Embeddings, pgvector. Voice AI: ASR, WebRTC, GoHighLevel, LiveKit, Amazon Polly, Azure Speech. NLP & Document AI: NLTK, Sentence Transformers, PaddleOCR, RoBERTa, DeBERTa, T5, LayoutLM, PyMuPDF, GLiNER. Vision & Deep Learning: TensorFlow, Keras, Roboflow, Ultralytics, MediaPipe, Detectron2, ONNX, PEFT, LoRA, QLoRA. ML & Data: PostgreSQL, SQL Server, BigQuery, Snowflake, Databricks, Apache Spark, Kafka, ETL, pandas, NumPy, dbt. Business Intelligence: Power BI, Tableau, Looker, Metabase, Superset, D3.js. MLOps & Cloud: SageMaker, MLflow, GitHub Actions, CI/CD, Vertex AI, vLLM, Triton. Full Stack & Automation: Django, Flask, Redis, REST API, GraphQL, MongoDB, Next.js, Zapier, Streamlit, Gradio, Supabase, Vercel, Celery, FastAPI.