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David O.

David O.

AI Trainer & Data Annotator — CrowdGen by Appen (ADAP Platform)

Nigeria flagNigeria, Nigeria

Key Skills

Software

AppenAppen
OneFormaOneForma
Other

Top Subject Matter

Healthcare and life sciences (medical response evaluation, healthcare domain)
Healthcare and life sciences (multimodal medical AI dataset creation)
Healthcare NLP (user-content sentiment/intent labeling for AI)

Top Data Types

TextText
AudioAudio
DocumentDocument
ImageImage

Top Task Types

RLHFRLHF
Data CollectionData Collection
ClassificationClassification
Fine-tuningFine-tuning

Freelancer Overview

AI Trainer & Data Annotator — CrowdGen by Appen (ADAP Platform). Brings 7+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Appen, RWS, and OneForma. AI-training focus includes data types such as Text, Audio, and Document and labeling workflows including RLHF, Data Collection, and Classification.

Labeling Experience

Pipeline Management — RWS TrainAI (Moravia Portal)

TextText

Managed project deliverables and quality metrics within the Moravia Portal workflow. Coordinated submission timing and quality tracking to ensure annotated datasets met project requirements. • Managed project queues and deliverable timelines • Tracked quality metrics for annotation work • Liaised with project managers through the portal • Ensured accurate submissions per task requirements

Present

Privacy & Compliance Operations — RWS TrainAI (Moravia Portal)

TextTextData CollectionData Collection

Operated under GDPR and privacy-first workflows when handling sensitive medical content, including PII and CBI, under NDA. Followed secure data handling protocols while working on annotation and validation tasks. • Handled PII/CBI with required data security protocols • Followed GDPR-compliant workflow requirements • Worked under signed NDA restrictions • Maintained privacy-first handling during labeling work

Present

LLM Fine-Tuning Data Preparation — RWS TrainAI (Moravia Portal)

TextTextFine-tuningFine-tuning

Curated domain-specific LLM fine-tuning data by preparing and organizing high-quality annotations for generative AI training workflows. Supported RLHF and fine-tuning phases through cleaned, task-aligned training inputs. • Prepared annotations for generative AI fine-tuning • Supported RLHF data workflows • Ensured domain relevance of curated labels • Prepared training-ready inputs for downstream use

Present

HITL Validator — RWS TrainAI (Moravia Portal)

TextText

Carried out Human-in-the-Loop validation by reviewing, correcting, and quality-checking AI-assisted annotations. Ensured accuracy, fairness, and inclusivity before labels were accepted for training. • Reviewed AI-assisted annotation outputs • Corrected and quality-checked label correctness • Enforced fairness and inclusivity quality criteria • Delivered validated annotations for model training data

Present

NLP Annotator — RWS TrainAI (Moravia Portal)

TextText

Performed Named Entity Recognition annotation by identifying and categorizing entities in unstructured text. Included medical and biomedical entity types to support NLP pipelines. • Tagged persons, organizations, locations, and dates • Categorized other relevant entity types • Applied NER standards to unstructured clinical text • Supported medical/biomedical NLP model training

Present

Education

U

University of Jos

Pharmacy, Pharmaceutical sciences

Pharmacy
2016 - 2023

Work History

C

Community Pharmacy

Community Pharmacist

Nigeria
2026 - Present