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Mayowa Oladeji

@mayowaoladeji

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I build high-quality AI datasets and Power BI insights for better decisions.

Nigeria

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What I'm looking for

I’m looking for opportunities where I can improve AI data quality, evaluate model outputs, build reliable data pipelines, and turn complex data into clear business insights.

I’ve supported AI data operations at Argos Multilingual Inc, annotating and validating NLP and computer vision datasets across 500+ records. I create precise JSON-formatted schemas for named entity recognition, intent classification, sentiment analysis, and image labeling.

At Prointegrate LLC, I evaluated LLM outputs for reasoning, factual accuracy, and safety. I designed edge-case prompts, analyzed prediction failures, and curated datasets with over 98% labeling accuracy to support RLHF and fine-tuning.

At S&P Global, I built dynamic Power BI energy analytics dashboards covering $11.2M in sales and 3,320 transactions. I transformed raw transactional data with Advanced Excel, Power Query, and ETL workflows into executive KPI reporting.

I bring disciplined QA, root-cause analysis, technical documentation, and data visualization to work that makes AI systems and business decisions more reliable.

Experience

Work history, roles, and key accomplishments

AI Data Annotator / Labeler

Argos Multilingual Inc

Feb 2026 - Aug 2026 (6 months)

Annotated and validated multi-domain NLP datasets, executed bounding box mapping, and authored model evaluation reports. Managed QA pipelines to improve dataset accuracy and first-pass verification rate.

Data Annotation NLP Named Entity Recognition Intent Classification Sentiment Analysis Computer Vision Bounding Box Mapping QA Pipelines JSON Fleiss' Kappa Maps Precision Recall

AI Data Trainer / Quality Analyst

Prointegrate LLC

Jun 2025 - Nov 2025 (5 months)

Evaluated LLM outputs for reasoning, accuracy, and safety, designed edge-case prompts, and curated high-precision datasets. Conducted root-cause error analyses to inform RLHF and fine-tuning.

LLM Evaluation Prompt Engineering Data Curation Root Cause Analysis RLHF Fine Tuning Quality Assurance Benchmarking

Data Analyst Specialist

S&P Global

Nov 2024 - Apr 2025 (5 months)

Engineered Power BI dashboards for energy analytics, standardized transactional data, and developed interactive visualizations for executive KPI tracking.

Power BI Excel Power Query ETL Data Visualization Dashboard Engineering KPI Tracking Trend Analysis