Data consultant with 2+ years of experience working in data analytics who has worked across various industries relating to healthcare, e-commerce and education. My strongest contributions mainly involve constructing time series dashboards to forecast future business metrics and have also also developed randomized controlled experiments (A/B tests) to increase page visits and landing page traffic in client websites. I enjoy conducting market research to effectively establish causality between product and user.Some of my notable achievements are:Developing an inventory dashboard for the Providence Hospital to forecast their fast-moving inventory output which has saved over $10,000 a month in unused inventory costs.Designed a quantile bootstrap experiment (and multiple A/B tests) for Cafe24's client stores that increased the average landing page conversion rate by 40% and affiliate traffic landing conversion rates by 120%. I am trying to become more active in writing so please visit my personal website https://charlestatsman.com where I will be making regular updates and releasing publications on data and statistics topics that interest me.Currently pursuing new data science/analyst/engineering opportunities so please connect with me at charlesjacobtan1@gmail.com.
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Data ScientistCairns OneilToronto, On, Ca
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Research Associate (Analytics Engineer) InternEnvironics Analytics May 2024 - Aug 2024Toronto, Ontario, Canada• Developed tables in Snowflake by transforming over 3 trillion records (20 TB) of cellular device movement and geodemographic data, enabling insights into the socio-economic profiles tied with each TTC subway station• Delivered a presentation to the R&D/Innovation team and key stakeholders, demonstrating how the constructed tables could also markedly enhance ad-targeting strategies for out-of-home advertising clients• Reduced ad-hoc query runtime by 2 hours on an X-Large warehouse by optimizing data clustering and pruning -
Sports StatisticianGenius Sports Mar 2024 - Apr 2024New York, United States -
Data ConsultantProvidence Hospital Inc Jan 2023 - Mar 2024• Developed a batch prediction solution for inventory demand forecasting with Airflow, Azure Data Lake, and Power BI, using a weekly retrained ARIMA model to prevent over $5,000 in overpurchased inventory monthly• Employed distributed computing (parallel processing) with Spark to reduce model tuning runtimes for over 8,000 unique, fast-moving items (e.g., surgical kits, vaccines, needles) by 97%, while using MLflow to log model tuning history, track experimentation metrics, and store loss scoring plots to monitor long-term model health -
Data ConsultantHostari Oct 2023 - Dec 2023New York, United States -
Data AnalystCafe24 Jan 2022 - Jul 2022Philippines (Remote)• Created scalable A/B testing solutions via quantile bootstrapping and quasi experimental design to analyze testing cycles for pop-up ad variations on e-commerce stores increasing landing page conversion rates by 40%• Utilized NLP algorithms such as semantic analysis and text/keyword clustering for SEM/SEO and customer lifetime value (CLTV) research to lift affiliate traffic conversion by 120% and reduce cart abandonment by 15% -
Research AssistantUniversity Of Toronto Dec 2020 - Apr 2021Toronto, Ontario, CanadaPlease refer to the project description under "Research Project - Poisson Regression Model for COVID-19" below. -
Data AnalystBell May 2020 - Aug 2020Greater Toronto Area Metropolitan Area• Developed an ETL pipeline using Python, SQL, and Cron to automate the extraction and preprocessing of 144 rows per day of mobile app performance metrics (e.g., crash count, error rate) from the Dynatrace API, storing the data in Bell’s SQL server, and saving over 4 hours of manual workflow• Optimized a random forest ensemble model, deployed via Flask and Docker, to forecast the above metrics, depicting results in Power BI while monitoring model performance with MLflow, maintaining a MAPE of 13% -
Math InstructorKumon Philippines 2012 - 2016Philippines• Provided assistance to students in different levels of math ranging from basic arithmetic to algebra and to help develop problem solving skills• Marked homework assignments and invigilated tests • Assisted multiple students in tackling levels of mathematics far beyond their grade level
Charles Jacob Tan Education Details
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Statistics
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International School ManilaIb Diploma
Frequently Asked Questions about Charles Jacob Tan
What company does Charles Jacob Tan work for?
Charles Jacob Tan works for Cairns Oneil
What is Charles Jacob Tan's role at the current company?
Charles Jacob Tan's current role is Data Scientist.
What schools did Charles Jacob Tan attend?
Charles Jacob Tan attended University Of Toronto, International School Manila, Udacity.
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