Abiodun Oyewumi

Data Annotation Specialist for ML/AI | Image, Text, Video & Audio Labeling | AI Trainer | Data Analyst

Oyo State, Nigeria

About

Struggling to train your ML/AI models with messy, inconsistent data? I’m a Data Annotation Expert who delivers high-quality, structured datasets that boost model accuracy and save you time. With 4+ years in tech, I’ve helped companies like Moonvalley and CrowdAi improve their AI performance by 20% through precise annotation. Let’s connect. DM to discuss how I can help your team succeed!

Experience

  • Trainer & Founder at G.TecHive
    Mar 2025 - Present · 1 yr 4 mos

    o Recognizing the gap in accessible tech education for people with non-technical backgrounds, I launched G.TecHive, a startup aimed at democratizing entry-level tech training. o My goal was to build a beginner-friendly platform that equips individuals with practical digital and data skills to improve job readiness in today’s tech-driven world. o I developed and delivered tailored training programs focused on the Microsoft Office Suite, Google Workspace, Microsoft 365, Data Annotation for Machine Learning, and Artificial Intelligence. o Positioning G.TecHive as a bridge for non-tech learners into the digital workforce. o Successfully launched the first training cohort with a 100% completion rate and strong participant feedback. Built partnerships with local communities and mentors, establishing G.TecHive as an emerging startup committed to accessible, hands-on tech education.

  • Contextual Image Captioning Specialist at Moonvalley
    Oct 2024 - May 2025 · 8 mos

    Produced over 3,000 high-quality captions with a 98% approval rate. This contributed to a significant improvement in model comprehension scores and enhanced dataset value for downstream NLP and CV tasks. The project output was later used in benchmark testing for multimodal AI systems.

  • Object Tracking Annotation Specialist at CrowdAI
    Aug 2021 - Jan 2023 · 1 yr 6 mos

    Used the company's annotation platform to tag and track objects across frames. Followed strict labeling guidelines, conducted manual QA, and flagged ambiguous cases for cross-checking. Additionally, collaborated with ML engineers to refine class definitions and resolve data ambiguities Achieved over 98% annotation accuracy, contributing to a 15% increase in model precision during validation. Helped streamline annotation workflows, reducing project turnaround time by 20%.

  • Data Annotation Specilaist at Daraja Inc.
    Jun 2019 - Aug 2021 · 2 yrs 3 mos

    Delivered building annotations with 98% boundary precision, which led to a measurable improvement in the model’s structure detection accuracy and directly supported its deployment in urban planning simulations and geospatial analysis projects.