Onyema Ezekwesiri
$10/hr
Data Analyst | Data Visualization Specialist | Machine Learning Engineer
ONYEMA EZEKWESIRI
I am a detail-oriented Data Analyst skilled in transforming raw data into actionable insights that drive informed business
decisions. With expertise in tools such as Excel, SQL, Python, and BI platforms, I specialize in data cleaning, analysis,
visualization, and reporting. I excel at identifying trends, uncovering patterns, and presenting findings in clear, impactful
ways to both technical and non-technical stakeholders. Being passionate about problem-solving and continuous learning, I
thrive in roles that require analytical thinking and strategic insight. My goal is to leverage data to improve efficiency,
optimize processes, and support organizations in achieving measurable growth and innovation.
EDUCATION
University of PortHarcourt, Nigeria
January 2012 - February 2016
● Bachelor Degree (Physics)
EXPERIENCE
Virtual Data Steward| Index Solutions | Remote-First
August 2022 – July 2025
● Analyzed large datasets to identify trends, patterns, and insights, increasing business efficiency
● Developed automated dashboards using Power BI and Excel, reducing manual reporting hours per week
● Collaborated with stakeholders to define key performance indicators (KPIs) and improve decision-making
● Optimized SQL queries, reducing data retrieval time by 25%
Technical Product Analyst | Qapitapay | Lagos, Nigeria
April 2022 – March 2023
● Created Excel-based reports to monitor performance and identify improvement opportunities
● Conducted statistical analysis and A/B testing to support marketing and product teams
● Developed comprehensive API documentation and user flow guidelines, enhancing the usability of products and
reducing support queries by 75%
● Cleaned, transformed, updated and analyzed data from multiple sources for easy storage and retrieval
Data Analyst (Intern) | Codebasics | Remote
May 2021 – April 2022
● Analyzed large datasets using SQL and Excel, generating actionable insights that improved client reporting accuracy and
reduced processing time by 20%
● Developed interactive dashboards in Power BI and Tableau to visualize KPIs, enabling stakeholders to track performance
and make data-driven decisions
● Performed data cleaning and transformation in Python (Pandas, NumPy) to ensure data integrity, increasing accuracy of
business intelligence reporting
● Conducted market and customer behavior analysis using statistical methods, identifying growth opportunities that
supported strategic planning initiatives
Python Developer (Intern) | Telusko | Remote
March 2021 – March 2022
● Developed and maintained Python-based applications, ensuring performance, scalability, and clean code
● Built and optimized Django backends for web applications, integrating RESTful APIs and database models
● Designed and implemented automated scripts for data processing, web scraping, and reporting
● Created and managed relational databases (PostgreSQL/MySQL), handling migrations and queries
● Collaborated with frontend developers to integrate UI components with Django views and APIs
Data Research Analyst | Kulenga | PortHarcourt, Nigeria
May 2018 – April 2021
● Conducted market research and compiled competitor data for clients, delivering insights to support strategic planning
and decision-making
● Segmented market competitors into premium, standard, and basic categories using Excel tables, enabling clear analysis
of competitive influence and market positioning
● Conducted revenue growth analysis across three market categories using Excel (tables, pivot tables, and charts),
creating visualizations that highlighted changing consumer preferences across different localities
● Developed and presented a data-driven story to the client, leveraging market analysis to highlight key business drivers,
which supported strategic decisions and contributed to startup profitability
SKILLS AND TOOLS
● Data Cleaning & Transformation Tools
● Data Validation and Quality Assurance
● Django, Python, Pycharm, Vs Code
● Microsoft Excel and Google Sheets
● Git, Git Bash, Git Hub
● Python, SQL, Power BI
● Problem-Solving & Critical Thinking
● Business Intelligence & Reporting
● Data Visualization & Storytelling
● Pandas, Numpy, Matplotlib, Seaborn, Jupyter Notebook
