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Hire the best Data Visualization Specialists in San Jose, CA

Check out Data Visualization Specialists in San Jose, CA with the skills you need for your next job.
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Clients rate Data Visualization specialists
Rating is 4.8 out of 5.
4.8/5
based on 531 client reviews
  • $67 hourly
    • 5.0/5
    • (45 jobs)
    Want to work with a Top-Rated Tableau & Data Analytics Expert? I build modern, visually compelling, and interactive dashboards, helping businesses unlock the power of their data to drive smarter decision-making. With 8+ years of experience in data analytics and data visualization, I focus on delivering clean, insightful, and interactive dashboards that help businesses grow. I’m well-versed across industries—whether it’s marketing data, sales reports, SEO dashboards, predictive modeling, or complex SQL and ETL workflows, I can build the best solution for you. What I do Best: • Business Intelligence & Data Visualization – Tableau, Tableau Prep, Power BI, Looker Studio, Zendesk Explore • Data Analysis – Python, SQL • Machine Learning & AI – Predictive modeling, forecasting, fuzzy matching algorithms, large language models (LLMs), retrieval-augmented generation (RAG) • ETL & Data Pipelines – Optimizing SQL queries, automating workflows • Excel Automation / VBA Macros • Cloud Data Solutions – Azure, AWS, Snowflake, BigQuery How I Work I start by understanding your goals, data sources, and key metrics. From there, I design and develop a tailored solution—whether it’s a dashboard, report, data pipeline, or machine learning model. I work collaboratively, incorporating your feedback and adapting to changes along the way. My focus is always on delivering clear, actionable, and reliable results that support smarter, data-driven decision-making Why Choose Me? • Proven Track Record – Top-rated on Upwork with 900+ hours worked, perfect 5-star feedback, and 100% job success. • Excellent Communication & Transparency – I’m always clear, responsive, and provide frequent updates on project progress. • Data-Driven Approach – I help you make informed decisions with precise, actionable insights. • Fast & Reliable – I respect deadlines and deliver high-quality results on time. I ensure that all key milestones are met without delays. • Industry Expertise – I’ve built dashboards for businesses in marketing, finance, e-commerce, and healthcare, helping them track KPIs, automate reporting, and extract real-time insights. What Clients Say About My Work: ⭐️⭐️⭐️⭐️⭐️"Kofi did a great job on ETL and ML tasks using Amazon Web Services (AWS). We'd be happy to work with him again." ⭐️⭐️⭐️⭐️⭐️"Kofi was great at communicating and meeting deadlines. He quickly adapted to a new data connector and delivered our dashboard efficiently. I appreciated his thoughtfulness and recommendations for improving our dashboard visualizations." ⭐️⭐️⭐️⭐️⭐️"Kofi was great to work with and very knowledgeable about Tableau. I will definitely work with him again if I can." ⭐️⭐️⭐️⭐️⭐️"It was an excellent experience working with Kofi. He consistently produces high-quality visualizations and delivers on time. He is committed, responsive to feedback, and flexible when project requirements change. I look forward to working with him on future projects!" Need Help on Your Next Project? Let’s schedule a call to discuss your project objectives and how I can help you unlock insights, automate reporting, and build visually appealing, actionable dashboards.
    Featured Skill Data Visualization
    Azure Machine Learning
    Macros
    Data Analysis
    Data Mining
    Database
    Business Intelligence
    Data Science
    Microsoft Power BI
    Microsoft Excel
    Python
    Tableau
    SQL
  • $70 hourly
    • 5.0/5
    • (11 jobs)
    Early in my career, I learned that I have a deep passion for data. It is incredibly rewarding to help analyze a business and provide new insights through data strategies. I love working on all sorts of projects, helping companies gain actionable insights, or implementing more robust technologies. While I may be new to Upwork, I have worked for years doing various data analyses and in data management roles. In all roles, I am constantly leveraging multiple tools and technologies to maximize the value of data for stakeholders. Strengths: -Experienced with various Business Intelligence tools such as Looker, Quicksight, Domo, etc. -Using both Python and/or SQL to support ETL processes -Creating robust dashboards and summaries for executive audiences -Well-versed with cloud storage technologies such as AWS -Project/Program Analytics with full data visualizations to support actionable insights. -Product Management in the startup space with an emphasis on API development I look forward to discussing our next project together!
    Featured Skill Data Visualization
    Testing
    Automation
    Data Entry
    Project Management
    API Integration
    Amazon Web Services
    SQL
    Statistics
    Microsoft Excel
    Business Intelligence
    Python
    Data Analysis
  • $40 hourly
    • 5.0/5
    • (1 job)
    I'm a data analyst and Python programmer. I would love to help your business with data cleaning, exploratory data analysis, questions about marketing & business intelligence, and more. Experienced with Python, Pandas, and SQL
    Featured Skill Data Visualization
    pandas
    Science
    Data Cleaning
    SQL
    Python
    Business Intelligence
    Exploratory Data Analysis
    Data Analysis
    Analytical Presentation
    Data Science
  • $210 hourly
    • 4.9/5
    • (179 jobs)
    Expert Vetted & Top Rated Plus Freelancer! Summary of Skills: Looking to provide data driven insights to companies and people using applied mathematics, statistics, and human ingenuity. My primary language is R, but also use Excel extensively and for business compatibility. Also, have SQL experience. Previously worked for a Fortune 500 tech company (Symantec in internet security) doing business statistics and data analysis. Graduate of Claremont Graduate School with a Masters in Mathematics in 2013. Graduated from Santa Clara University in Finance and Mathematics with an emphasis in applied math and minor in physics. Looking to help people and companies gather and interpret data using mathematical and statistical techniques. Brief Background: In recent years, I have been providing consulting in a variety of analytic fields including technology, healthcare, gaming, financial, legal (patents and data research for court cases), and others. I make sense of your data so you can spend more time making informed decisions or asking deeper level questions. Since college I have tutored a wide variety of people in math from middle school to the MBA level. I have covered subjects including, calculus, statistics, and multi-variable regression modeling. At Santa Clara I worked in the Drahmann Center as a tutor to help my fellow students with their classwork and learning, specifically in math.
    Featured Skill Data Visualization
    Statistical Analysis
    Marketing Analytics
    Microsoft Excel
    Price Optimization
    Data Science
    Analytics
    Data Interpretation
    Business Mathematics
    Data Modeling
    R
    Statistics
    Algorithm Development
    Tutoring
    Mathematics
  • $35 hourly
    • 5.0/5
    • (5 jobs)
    I am a Graduate in Statistics and Data Science from the University of California Santa Barbara Proficient in: Python, R, SQL, Snowflake, Tableau, Data base management, and Data analysis & visualization.
    Featured Skill Data Visualization
    Data Interpretation
    Data Analysis
    R
    Python
    SQL
  • $100 hourly
    • 5.0/5
    • (1 job)
    A versatile Data Scientist with 7+ years of experience in Designing, building, deploying, and managing high-quality complex data and business analytics solutions & converting these into actionable insights. Proficient in various dashboards such as Kibana, Power BI, and Tableau. Vast experience in descriptive data analysis using statistical & mathematical techniques. I am a highly skilled and experienced Data Scientist with expertise in machine learning, data analysis, Power BI, and ChatGPT. As a Data Scientist, I possess a deep understanding of statistical analysis, predictive modeling, and data visualization. My expertise extends to machine learning techniques, where I can build powerful algorithms that uncover valuable insights hidden within your data. Whether it's classification, regression, clustering, or recommendation systems, I can employ state-of-the-art machine learning algorithms to drive actionable results. In addition to my machine learning skills, I excel in data analysis using various statistical tools and techniques. I can leverage your data to identify trends, perform in-depth exploratory analysis, and generate comprehensive reports that facilitate informed decision-making. As a Power BI specialist, I can transform your raw data into meaningful visualizations and interactive dashboards. With an eye for design and a focus on user experience, I can create visually appealing and intuitive data representations that empower you to extract valuable insights at a glance. Furthermore, I have extensive experience working with ChatGPT, a powerful language model. I can integrate ChatGPT into your applications, automating customer interactions and enhancing user experiences through natural language understanding and generation.
    Featured Skill Data Visualization
    ChatGPT
    Data Extraction
    Deep Learning
    Machine Learning
    Looker Studio
    Data Science
    SQL
    Data Analysis
    Python
    Data Analytics
    Microsoft Power BI
  • $45 hourly
    • 0.0/5
    • (0 jobs)
    Researcher & Data Analyst Analytical and social policy research scientist with demonstrated expertise in analyzing and evaluating the effectiveness of socio-economic policies and programs. Identifies, collects, and analyzes useful data from a variety of information sources. Translates facts into actionable insights for decision-makers to positively impact target populations. Dedicated to harnessing the power of data to benefit communities and their members. * Champions research on education, poverty, procurement, and government funding to drive change. * Synthesizes, interprets, and translates data from a variety of sources into actionable insights. * Defines surveys, collection tools, dashboards, indicators, and procedures to improve data accuracy and visibility.
    Featured Skill Data Visualization
    Microsoft Excel
    R
    Data Collection
    Scientific Literature Review
    Survey Design
    Program Evaluation
    Strategic Planning
    System Monitoring
    Project Management
    Data Analysis
  • $30 hourly
    • 5.0/5
    • (2 jobs)
    Freelancer based in United States. Data Analytics: - SQL - R - Python - Tableau - Excel - Big Query
    Featured Skill Data Visualization
    Google Sheets
    BigQuery
    SQL
    R
    Microsoft Excel
    Tableau
    Python
    Data Analysis
  • $100 hourly
    • 5.0/5
    • (68 jobs)
    🚀 As a TOP RATED PLUS freelancer with a 100% Job Success Rate on Upwork, I bring expertise in data visualization using Power BI. I have the ability to transform raw data into relevant information, providing insights to help clients visualize their data. 👨‍💻 With over 10 years of experience, I am a certified Power BI expert and master in DAX language. I also possess a deep understanding of SQL and have a track record of delivering high-quality solutions for my clients. 📈 Whether you need help with data modeling, dashboard creation, or performance optimization, I offer a range of services to suit your needs. I am committed to providing stunning and flexible business intelligence solutions that help you make informed decisions and stay ahead of the competition. 💻 Some of the services I offer include: - Full-stack Power BI solution development - Implementing Power BI embedded solutions and row-level security - Power BI solutions audit and data model enrichment - Power BI data model performance optimization - Custom visuals development - Basic and advanced DAX and Power Query remote and on-site training 📊 Let's take your data to the next level together! Contact me to get started.
    Featured Skill Data Visualization
    Financial Analysis & Valuation
    Financial Analysis
    Analytics
    Data Analysis
    Microsoft Power BI Development
    Data Modeling
    Power Query
    Business Intelligence
    Microsoft Power BI Data Visualization
    SQL
    Data Analysis Expressions
    Microsoft Power BI
    Microsoft Excel
    Dashboard
  • $10 hourly
    • 5.0/5
    • (1 job)
    Motivated Data Scientist enriched with knowledge from ISB Hyderabad and experienced in business analytics, data analytics and AI/ML with a demonstrated history of working in the information technology and services industry in Airlines and Finance domain(Corporate Actions). Being a keen learner always, I decided to pursue my interest in data science along with my regular job in order to help finding solutions to the arising data problems. I have developed basic knowledge in Machine learning, Big Data and Data Analytics.
    Featured Skill Data Visualization
    Data Science Consultation
    Analytics
    Deep Learning Modeling
    Business Analysis
    Machine Learning Model
    Artificial Intelligence
    Deep Learning
    Machine Learning
    Data Science
    Python
    Data Analytics
    SQL
    Big Data
    Tableau
  • $70 hourly
    • 0.0/5
    • (0 jobs)
    Are you overwhelmed with manual data processes and seeking efficient automation? I specialize in transforming complex data into actionable insights using Power BI, Python, and Google Workspace tools. With over 5 years of experience, I've helped businesses automate workflows, enhance reporting accuracy, and save countless hours. Services Offered: Custom Power BI dashboards for real-time analytics Automation of repetitive tasks using Python and Google Apps Script Data cleaning and transformation with Pandas and SQL Integration of machine learning models for predictive insights Let's collaborate to streamline your operations and unlock the full potential of your data. Tools I Work With: Power BI | Python | SQL | TensorFlow | PyTorch | C++ | MATLAB | GitHub | VS Code | Apps Script | GCP | Azure | Jupyter | Colab | Linux | Excel
    Featured Skill Data Visualization
    Data Analytics
    SolidWorks
    CAD
    Data Processing
    Microsoft Power BI
    GUI Design
    Digital Signal Processing
    Feature Engineering
    MATLAB
    PyTorch
    TensorFlow
    Python
    Deep Learning
    Machine Learning
  • $30 hourly
    • 0.0/5
    • (0 jobs)
    Proficient with data analysis tools and techniques, with a strong academic background. Eager to apply my analytical skills and contribute to leveraging data-driven insights for organizational success.
    Featured Skill Data Visualization
    Leadership Skills
    Data Analysis
    Microsoft Excel
    Intercultural Communication
    Tableau
    Python
    MySQL
  • $30 hourly
    • 0.0/5
    • (4 jobs)
    I'm a Software QA Engineer with hands-on experience at Cisco, Zoom, and Apple. I specialize in delivering reliable, high-quality user experiences across platforms by combining manual and automated testing. My core skills include: ✅ Manual and automated testing across iOS, Android, macOS, and Windows 🧪 Writing, executing, and maintaining detailed test cases 🐞 Debugging and reporting bugs with clarity and precision ⚙️ Experience with test automation frameworks and tools like Selenium, Appium and Playwright 🔁 Performing regression testing to verify fixes and ensure stability 🗣️ Strong communication skills for cross-functional collaboration and issue reporting Whether you need someone to dive into QA from day one or support your product through its final stages, I bring a dependable, detail-oriented approach to every project. Let’s connect if you're looking for a reliable QA partner to help ship polished, user-friendly products.
    Featured Skill Data Visualization
    API Testing
    GUI Testing
    Functional Testing
    Agile Software Development
    Test Report
    Data Analysis
    Regression Testing
    Python
    A/B Testing
    Software QA
    Quality Assurance
    iOS Development
  • $30 hourly
    • 0.0/5
    • (0 jobs)
    Dynamic and results-driven Software Engineer with over a decade of diverse experience in designing, developing, and optimizing scalable software solutions. Proficient in Java (8–21), Spring Boot, Angular, and back-end system architecture, with a strong focus on microservices, API integration, and data visualization. Skilled in building high-performance, secure platforms and leading cross-functional teams to deliver innovative solutions. Currently expanding expertise in cloud infrastructure with a focus on AWS, actively pursuing certifications and hands-on projects to deepen proficiency. Eager to embrace new challenges and explore learning opportunities in emerging technologies and collaborative environments. Key Highlights • Backend Development: Engineered robust solutions for SMS gateways, data-heavy applications, and real-time scheduling using Spring Batch, Quartz, and REST APIs. • Front-End Mastery: Delivered 50+ interactive dashboards using Angular and Syncfusion, significantly enhancing user experience and analytical capabilities. • Enterprise Solutions: Streamlined turbine maintenance workflows and developed mobile applications with Xamarin and ASP.NET, boosting customer satisfaction by 35%. • IoT Expertise: Innovated smart metering solutions, optimizing data transmission and integrating advanced protocols with Sigfox IoT environments. • Software Optimization: Revamped legacy systems, enhancing performance via JavaFX, JNI, and JPA, reducing processing times by 30%. Technical Proficiencies • Languages: Java, C#, C++, JavaScript • Frameworks: Spring Boot, Angular, ASP.NET, Xamarin, J2EE • Cloud Technologies: AWS (in progress) • Databases: Oracle, My SQL, MS SQL • DevOps: Git, GitLab, CI/CD pipelines • Testing Tools: JMeter, Arquillian • Visualization: Prometheus, Grafana, Syncfusion, DevExpress
    Featured Skill Data Visualization
    J2EE
    Angular
    Windows Presentation Foundation
    Xamarin
    WordPress Development
    SQL
    Spring Boot
    Java
    C#
    Desktop Application
    App Development
    Web Application
    Web Development
  • $18 hourly
    • 5.0/5
    • (1 job)
    Experienced data analyst with over 7 years of expertise in developing reporting solutions to optimize business operations. Demonstrated success in creating intuitive self-service dashboards for real-time operations monitoring and strategic dashboards to enhance program management decision making. Proficient in utilizing Tableau, SQL, and Python to streamline the reporting process from data pipelines to dashboard deployment.
    Featured Skill Data Visualization
    Root Cause Analysis
    User Acceptance Testing
    User Experience Design
    Analytics Dashboard
    KPI Metric Development
    SQL
    Content Writing
    ETL
    Tableau
    Data Analysis
  • $30 hourly
    • 0.0/5
    • (0 jobs)
    I’m an analytics professional with over 6 years of experience turning complex data into actionable insights through a blend of analytical rigor, business understanding, and visual storytelling. Skilled in tools such as Python, SQL, Tableau, Power BI, and advanced Excel, I specialize in building intuitive dashboards and delivering data narratives that support strategic decisions. My background spans financial services, technology, and consulting, where I’ve led data-driven initiatives, forecast modeling, and performance analysis to help organizations uncover opportunities and drive results.
    Featured Skill Data Visualization
    Microsoft Power BI
    Tableau
    Python
    Data Cleaning
    Business Analysis
    Analytics Dashboard
    Dashboard
    SQL
    Microsoft Excel
    Information Analysis
    Analytical Presentation
    Data Analysis
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