Fisayo Ajayi

Data Analyst with 5+ years of experience transforming operational, AI, and business data into actionable insights that improve quality, efficiency, and decision-making. Experienced in SQL, Python, Power BI, Excel, and machine learning, with a strong background in data validation, dashboard development, statistical analysis, and predictive modeling. Proven ability to analyze large datasets, automate reporting workflows, and communicate insights that support strategic business objectives across cross-functional teams.

Data Quality Analyst - HUGO

(2021-03)

• Analyze large-scale datasets to identify quality trends, anomalies, and opportunities for process improvement across AI and machine learning projects.
• Develop and monitor performance and quality metrics, providing insights that improved data handling efficiency by 15%.
• Conduct data validation, root-cause analysis, and reporting to ensure dataset accuracy and reliability for model training.
• Collaborate with cross-functional teams to optimize data workflows, increasing operational efficiency by 20%.
• Evaluated over 400,000 annotated records, contributing to high-quality datasets and a 92% model accuracy rate.

Data Analyst - Upwork

(2021-12)

Freelancing

• Executed end-to-end workflows involving advanced wrangling, multivariate analysis, and model development using Decision Trees, Random Forest and Neural Networks to extract predictive insights from complex datasets with 95% accuracy.
• Built optimized Python (Pandas, NumPy, scikit-learn) and SQL pipelines, implementing 95% efficient classification models and evaluating performance with confusion matrices and related metrics to produce deployment-ready outputs.
• Applied inferential statistics and regression techniques with 95% accuracy which support predictive analytics initiatives.

Freelance Writer - Fiverr

(2018-02 - 2020-01)

• Managed writing projects with strict deadlines, demonstrating strong communication and research skills.

Master of Science - Data Analytics - NEXFORD University (2024-09 - 2025-08)

Data Science - UTIVA (2022-03 - 2022-10)

Bachelor of Science - Mechanical Engineering - Federal University of Technology Akure (2012-11 - 2018-03)