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David O.

David O.

AI Annotation Specialist (Audio Annotation Specialist) at RWS

Nigeria flagLagos, Nigeria

Key Skills

Software

CVATCVAT
SuperviselySupervisely
LabelboxLabelbox

Top Subject Matter

Speech recognition
dubbing/TTS quality
language models

Top Data Types

AudioAudio
ImageImage
TextText
DocumentDocument

Top Task Types

TranscriptionTranscription
Action RecognitionAction Recognition
Bounding BoxBounding Box
Text GenerationText Generation

Freelancer Overview

AI Annotation Specialist (Audio Annotation Specialist) at RWS. Brings 5+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include RWS. Education includes Bachelor of Science, Ajayi Crowther University (2025) and Senior Secondary School Certificate, Christlead Model College (CMC) (2019). AI-training focus includes data types such as Audio, Video, and Image and labeling workflows including Transcription, Action Recognition, and Bounding Box.

Labeling Experience

AI Annotation Specialist (Text & Multimodal Annotator) at RWS

TextTextText GenerationText Generation

Handled text and multimodal comparison tasks to improve cross-domain dataset quality. • Completed text-to-image/video comparisons and captioning to support multimodal learning. • Curated conversational dataset elements and ensured annotation accuracy. • Followed detailed instructions to maintain consistency across modalities. • Performed verification checks to ensure reliable training data.

2025 - 2026

AI Annotation Specialist (Image Labeling Analyst) at RWS

ImageImageBounding BoxBounding Box

Created image annotations including bounding boxes and dense labeling to strengthen image recognition datasets. • Performed image quality checks to flag issues affecting model training. • Applied object isolation/removal labeling to improve object-focused datasets. • Ensured compliance with detailed labeling guidelines for consistency. • Verified labels with transcription/review and count checks as needed for QA.

2025 - 2026

AI Annotation Specialist (Video Annotation Expert) at RWS

VideoVideoAction RecognitionAction Recognition

Performed temporal action labeling on video to create accurate training signals for computer vision. • Conducted video shot correction to improve temporal consistency. • Labeled VFX and performed object picking to support multi-class visual understanding. • Applied guidelines to maintain annotation consistency across complex sequences. • Completed quality verification using count checks and rubric reviews.

2025 - 2026

AI Annotation Specialist (Audio Annotation Specialist) at RWS

AudioAudioTranscriptionTranscription

Provided audio dubbing and TTS quality evaluations by inspecting segments and aligning content for speech recognition support. • Labeled and segmented audio with accurate timestamps for downstream modeling. • Checked transcription quality and alignment to improve text-to-speech consistency. • Performed rubric-based verification to ensure dataset reliability. • Supported dubbing/TTS evaluation workflows for language and speech models.

2025 - 2026

Education

A

Ajayi Crowther University

Bachelor of Science, Physics with Electronics

Bachelor of Science
2019 - 2025
C

Christlead Model College (CMC)

Senior Secondary School Certificate, Secondary Education

Senior Secondary School Certificate
2016 - 2019

Work History

I

Infratel Africa

Field Operations Support Engineer

Lagos
2026 - Present
I

Infratel Africa

Telecoms Field Support Engineer

Lagos
2025 - 2025