Oluwaseun J.

Key Skills

Software

Appen

Other

Mercor

Mindrift

Micro1

OneForma

Toloka

Clickworker

Data Annotation Tech

Top Subject Matter

AI response evaluation

content quality assessment

and dataset labeling for AI/ML training.

Top Data Types

Text

Audio

Video

Image

Document

Top Task Types

RLHF

Transcription

Action Recognition

Classification

Computer Programming/Coding

Text Generation

Object Detection

Freelancer Overview

Freelance Data Contributor (Annotation, Transcription & Translation) — RLHF and AI/content evaluation tasks. Brings 4+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Appen and Other. Education includes Bachelor of Engineering, Federal University of Technology, Minna (FUTMINNA) (2026). AI-training focus includes data types such as Text, Audio, and Video and labeling workflows including RLHF, Evaluation, and Rating.

Labeling Experience

Video Annotation Specialist (Freelance) — Frame/sequence video labeling

OtherVideoAction Recognition

Annotated video footage at the frame and sequence level for AI and machine learning training datasets. Labeled actions, events, and objects in video sequences following strict platform quality guidelines. Reviewed and validated previously annotated content to ensure consistency and accuracy. • Labeled visual actions/events/objects with timestamp and sequence context • Verified prior annotations for agreement with guidelines • Interpreted first-person/egocentric clips at frame and timestamp granularity • Selected visual evidence supporting each labeling decision

2025 - Present

Freelance Data Contributor — Search Relevance Rating & Content Quality Evaluation

AppenText

Rated search results for relevance to user queries and assessed content quality against detailed project rubrics. Used structured guidelines to judge relevance and usability of outputs. Helped ensure dataset consistency by applying the same scoring approach across tasks. • Performed search relevance rating for query-result alignment • Evaluated content quality using rubric-driven scoring • Applied consistent taxonomy rules for categorization • Reported issues that affected annotation reliability

2020 - 2025

Freelance Data Contributor (Annotation, Transcription & Translation) — RLHF and AI/content evaluation tasks

AppenTextRLHF

Evaluated AI-generated responses for quality, accuracy, and usefulness as part of RLHF and model training workflows. Applied predefined rubrics and taxonomies to categorize labeled content consistently and reliably. Flagged inconsistencies and ambiguities to maintain annotation quality. • Rated AI response outputs against guideline criteria • Labeled and categorized text datasets for AI/ML training • Reviewed for compliance with project rubrics and reliability standards • Qualified for higher-complexity and higher-pay task tiers based on quality scores

2020 - 2025

Freelance Transcriptionist — Audio transcription and transcription-quality compliance

OtherAudioTranscription

Transcribed audio recordings into verbatim and clean-read text while meeting strict transcription formatting and accuracy standards. Adapted transcription style to different accents, industries, and varying audio quality levels. Completed qualification requirements demonstrating professional-grade transcription accuracy. • Produced clean-read and verbatim transcripts • Managed accents and audio-quality variability across recordings • Followed TranscribeMe formatting and accuracy guidelines • Passed transcription qualification exams to maintain task eligibility

2019 - 2022

Education

Work History