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Olanrewaju Ajayi

@olanrewajuajayi1

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Data analyst focused on text-based labeling, validation, and insights.

Nigeria

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What I'm looking for

I’m looking for a role where I can turn messy text and operational data into validated datasets, KPIs, and clear dashboards—working with teams that value accuracy, documentation, and measurable impact.

I’m a detail-oriented data analyst and business analyst with 3+ years of experience working with large volumes of text-based and structured data in remote environments. I apply consistent judgment to text-based information, follow detailed annotation guidelines, and maintain high accuracy under strict deadlines.

I specialize in data verification, research, classification, labeling, and quality control—helping teams build reliable datasets for analytics and machine learning workflows. In previous roles, I collaborated with stakeholders to define analytics requirements, transformed raw operational data into clean datasets, analyzed KPIs to uncover trends and anomalies, and delivered dashboards and reports in Excel and Google Sheets.

Experience

Work history, roles, and key accomplishments

Data Annotator

IgniteTech

Nov 2023 - Oct 2025 (1 year 11 months)

Reviewed and annotated large volumes of text-based data according to guidelines, ensuring consistency and accuracy across datasets. Performed data validation and quality checks, documented decisions, and escalated edge cases to maintain high data integrity under strict deadlines.

Text Annotation Data Validation Data Quality Control Research & Information Verification Consistent Judgment

Data Analyst

IgniteTech

Mar 2022 - Oct 2023 (1 year 7 months)

Partnered with business, product, and engineering stakeholders to define analytics needs and prioritize BI/reporting requirements. Transformed raw operational data into clean, structured datasets and delivered KPI insights through dashboards and reporting.

KPI Analysis Data Cleaning data transformation Dashboarding Data Validation Data Exploration

Business Analyst

Peralta

Mar 2021 - Mar 2022 (1 year)

Analyzed and summarized large volumes of information into clear, structured insights while conducting thorough online research to verify claims and ensure accuracy. Solved complex reasoning-based analytical questions and documented feedback to improve content clarity and logic.

Business Analysis Online Research Summarization Documentation Attention To Detail Critical Thinking Remote Collaboration

Data Science

HamoyeAI Lab

Jul 2020 - Feb 2021 (7 months)

Worked on Fyipe, a SRE and DevOps platform. Built practical experience in data exploration, visualization, machine learning, and web application development.

Data Exploration Data Visualization Machine Learning Web Application Development DevOps SRE Data Processing Model Development