Hi, I am

Alex Olerimi

A Data Scientist transforming complex datasets into actionable strategic insights. Specializing in Machine Learning, Big Data Analytics, and Predictive Modelling.

Technical Expertise

Programming & ML

Python (pandas, sklearn, TensorFlow), SQL, R, GitLab, NumPy, Matplotlib

Machine Learning

Classification, model optimisation, SMOTE, feature engineering, CNN/LSTM, hyperparameter tuning

Data Engineering

ETL pipelines, Azure (Synapse/Storage), data modelling, large-scale dataset processing

Analytics & Visualisation

Power BI, DAX, Excel advanced formulas, pivot tables, dashboards

Employment History

EDMS Support Analyst

Warri Refinery & Petrochemical Company

2013 – 2015

• Supported digital document management across departments. • Assisted engineers with data retrieval and technical documentation. • Performed structured data classification, indexing, and archiving. • Ensured data integrity and accessibility for stakeholders.

Data Clerk

Hequip Resources

Aug 2015 – Jan 2018

• Managed daily data processing, documentation, and quality assurance tasks. • Developed structured data collection systems improving reporting accuracy. • Cleaned, validated and updated sensitive records ensuring compliance and accuracy. • Supported management with ad-hoc analysis and produced reports on operational trends.

Data Analyst

PICKMEUP.NG

Jan 2018 – Sept 2022

• Analysed rich operational datasets to support decision-making and customer experience improvements. • Merged, cleaned and processed datasets using SQL, Python, and Excel. • Designed and delivered analytical dashboards using Power BI. • Identified business process inefficiencies and proposed data-driven improvements. • Collaborated cross-functionally with engineering and product teams to translate user and operational needs into actionable insights.

Key Achievements

  • Built predictive ML models with strong classification accuracy, validated through statistical tests.
  • Processed datasets exceeding 65 million rows using Spark, reducing computation times significantly.
  • Automated reporting workflows that reduced processing time by up to 40%.
  • Created Power BI dashboards used by multiple stakeholders to support data-driven decision-making.
  • Demonstrated resilience, emotional intelligence, and calm communication in high-pressure environments.

Research Interests

  • Medical image analysis
  • Predictive modelling
  • Hybrid ML systems (deep learning + classical ML)
  • Bayesian optimisation
  • Health informatics
  • Efficient/Green AI architectures

Selected Projects

Highlights from my recent work

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Tinnitus Detection Using Machine Learning

Developed a predictive model to classify tinnitus presence using extracted features from patient data. Built and evaluated multiple ML algorithms (SVM, Random Forest, Logistic Regression), implemented SMOTE, and achieved strong performance.

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ECG Heartbeat Classification

Applied ML techniques to classify arrhythmia patterns on medical data. Developed automated preprocessing pipeline for signal segmentation and tested models including CNN-based approaches.

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Violent Crime Big Data Analysis

Processed and analysed multi-million-row datasets (65M+ Rows) using PySpark and Azure Databricks. Built automated ETL pipeline and delivered insight dashboards for regional crime trends.

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Latest Thoughts

Insights on data, tech, and building

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1/3/2026

The Future of AI in Healthcare

How machine learning models are revolutionizing diagnostics and patient care....

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1/3/2026

Scaling Data Pipelines for Big Data

Best practices for processing millions of rows efficiently using Apache Spark....

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