Charis Oneyemi

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View the Project on GitHub Tsemaye/portfolio

Product Operations & Analytics | MSc Data Science

Skills: Product Operations, Growth Analytics, Cross-Functional Execution, Stakeholder Communication, SQL, Python (Pandas, Scikit-Learn), Tableau, Data Visualization, Cohort Analysis, Retention Analysis, Customer Segmentation, Dashboard Development, Process Design, KPI Tracking, Workflow Documentation, Experimentation Thinking

LinkedIn: linkedin.com/in/charisoneyemi

Gmail: charisoneyemi@gmail.com

GitHub: https://github.com/Tsemaye


Education

Product & Analytics Projects

Customer Churn & Retention Analysis

PostgreSQL • Tableau

Analyzed churn behavior across 7,000+ telecom customers to identify onboarding failures, retention risks, and feature adoption patterns affecting customer retention.

The Churn Problem

Key Insights

• New customers churned at 56.8%

• Month-to-month users churned 18x more than long-term contract users

• Customers with low satisfaction scores consistently churned

• Retention improved significantly after long-term commitment

Where and Why it happens.png

What I Explored

• Cohort retention analysis

• Feature adoption patterns

• Customer risk segmentation

• Offer effectiveness

• Contract behavior analysis

Full Case Study


Fraud Classification Model and Deployment

model_deployment

Built and compared multiple ML models (XGBoost, SVM, KNN, MLP) for fraud classification and evaluated performance trade-offs across financial transaction data. Python Machine Learning Model

Additional Projects

Retail Sales Data Analysis: A First Glance

Retail Sales Data Analysis

Exploratory Tableau dashboard analyzing retail sales trends, customer behavior, and operational performance metrics. Retail Sales Data Analysis

Video Game Analysis

Video Games Sales Analysis Dashboard

Video Games Sales Analysis Dashboard.png

Analyzed global video game sales trends across publishers, platforms, genres, and regions using Tableau dashboards. Explored market performance patterns and regional differences in consumer behavior. [Publication](https://www.mdpi.com/1424-8220/22/8/3048)

Law Dashboard

Built an operational dashboard for a legal services company to track performance metrics, workflow activity, and business operations for decision-making support. Legal Services Analysis

Accident Data Analysis

Accident Dashboard

Explored accident trends across geography, road conditions, weather, and vehicle types to identify factors influencing accident severity and road safety outcomes. https://bit.ly/3uZrrTk

Coffee Sales Analysis

Coffee Sales Dashboard

Analyzed coffee sales performance across product categories, roast types, sizes, and customer segments to uncover sales trends and business opportunities. https://bit.ly/3IyZ0Pe

Employee Data Analysis

https://github.com/Tsemaye/SQL

Wrote SQL queries using JOINs, CASE statements, GROUP BY, aggregations, and filtering techniques to analyze employee demographics, salaries, and workforce trends.

Work Experience

Product & Operations Associate @ Maestroverse (October 2025 - Present) Coordinated cross-functional execution across engineering, design, and social media teams in a pre-launch startup environment. Built and maintained internal documentation, workflows, and knowledge systems in Notion to support structured decision-making. Defined success criteria and tracked execution against milestones, flagging risks and driving resolution across teams. Served as the primary communication bridge between the founder and all functional teams, ensuring clarity and accountability on priorities.

Partner Support Volunteer @ YouVersion (June 2024 - February 2025) Analyzed 250+ recurring user inquiries to identify patterns and surface insights that improved internal support workflows. Synthesized user feedback into structured reports communicated to internal teams for process improvement. Maintained documentation and knowledge systems to improve response quality and operational efficiency.

Basic Technology Instructor/Teacher @ National Youth Service Corps (June 2022 - May 2023) Communicated technical concepts clearly to non-technical audiences and iterated on delivery based on feedback. Managed scheduling, resources, and operations for a structured learning environment of 200+ students.

Administrative Intern @ Quantum Business School (June 2020 - Nov 2020) Supported day-to-day administrative operations including scheduling, documentation, and process coordination. Identified inefficiencies in client scheduling and implemented workflow improvements that increased operational efficiency.

Isaiah 60