Phionah Masindi

Driven and detail-oriented Junior Data Scientist with a strong foundation in SQL, Python, and data visualization. Passionate about leveraging data insights to improve customer experiences and drive business growth. Seeking opportunities to apply my expertise in customer profiling, churn analysis, and performance reporting to contribute to data-driven decision-making and innovation.

Junior Data Scientist at Telkom (2024-05 – Present)

Contract worker focusing on data analysis and visualization.

• Conducted customer profile analysis to understand purchasing behaviors, focusing on mobile data and voice spending across various age groups and income brackets.
• Analyzed large datasets using SQL and Python to derive insights into customer behavior and segmentation.
• Created and optimized SQL queries to consolidate and interpret complex data for reports on bundle sales and campaign performance.
• Contributed to churn analysis by profiling customers based on service usage, call duration, and waiting times, identifying potential risks and improvement opportunities.
• Designed dashboards in Power BI to visualize key performance metrics, improving reporting efficiency for the CVM team and stakeholders.
• Applied cohort analysis techniques to track service usage and revenue trends across multiple months, enhancing retention strategies.
• Ensured data accuracy by cleaning, validating, and transforming datasets for use in reports and machine learning models.
• Collaborated with cross-functional teams to deliver actionable insights, supporting upselling strategies and customer satisfaction improvements.

Data Science student Intern at BCX (2023-09 – 2023-11)

Internship focusing on data analysis and visualization.

• Analyzed large datasets using SQL and Python, identifying key trends and patterns, which improved data-driven decision-making by 30%.
• Developed and presented data visualizations using PowerBI, resulting in enhanced stakeholder understanding of complex data sets.
• Collected technical requirements for customer accounts, defining data rules for and KPIs for performance metrics.

National Certificate in Information Technology System Development, Data Science – ExploreAI Academy (2023-01 – 2023-12)

Bachelor of Science – University of Witwatersrand (2018 – 2022)