Chiamaka Anastasia

Chiamaka Anastasia

Data Analyst
Nigeria
English
Freelance Remote

About Me

Data Analyst specialising in operational analytics and customer behaviour, with 2+ years turning messy, large-scale datasets into decisions that stick. Known for building dashboards that flag problems before they escalat…

Experience

Data Analyst

Jobaaj Learning · Adalaj , Gujarat , India
May 2025 - May 2026 · 1 year

<p>Analyse operational and project data, including task timelines, cost records, and resource allocation, to support performance tracking and management reporting.</p><p> Used SQL and Power BI to examine turnaround times, task completion rates, and cost patterns, surfacing actionable insights for stakeholders.</p><p> Design and maintain dashboards to monitor operational performance and flag workflow bottlenecks in real time.</p><p> Clean and validate datasets by resolving missing values, duplicates, and formatting inconsistencies, improving overall reporting accuracy.</p><p> Identified inefficiencies in task allocation and workflows, contributing to a 10% reduction in project costs.</p>

Junior Data Analyst

Creatify · Abuja , FCT , Nigeria
Nov 2024 - Jan 2026 · 1 year 1 month

<p>Cleaned and validated datasets using Excel and Power BI, ensuring consistent and accurate data before analysis.</p><p> Applied data modelling techniques in Power BI to structure datasets for reliable, consistent reporting.</p><p> Explored datasets to identify trends, patterns, and outliers using Excel and Power BI, helping uncover insights from the data.</p><p> Presented analysis findings using simple visuals and clear explanations, making insights easy to understand for non-technical stakeholders.</p>

Data Analyst Intern

Octave Incorporation · Ikeja , Lagos , Nigeria
Jan 2023 - Apr 2023 · 2 months

<p>Cleaned and structured 2,000+ weekly operational records using SQL and Excel, resolving duplicates and inconsistent formatting to ensure data integrity.</p><p> Built Power BI dashboards using star schema modelling and DAX measures to track the full task lifecycle from assignment through to completion.</p><p> Analysed operational data to pinpoint delays in task completion and cost inefficiencies across workflows, delivering targeted recommendations.</p><p> Performed data validation checks (null values, duplicates, and referential integrity) to improve KPI reporting reliability.</p><p> Automated weekly reporting using Excel Power Query, reducing manual effort by 3+ hours per week.</p>

Certifications

IBM Data Science Professional Certification

Coursera · American Samoa , US Territories , United States of America (USA) · 2025

Skills

Python Pandas NumPy SQL Excel Pivot Tables Power Query Power BI Tableau Data Cleaning Data Validation Churn Analysis Funnel Analysis KPI Development Customer Segmentation PowerPoint Canva OBS Studio Communication Problem-Solving Teamwork Attention to Detail Cross-functional Collaboration Data Modelling DAX Star Schema Referential Integrity
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