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Joseph Mensah

Joseph Mensah

AI Training Contributor (Freelance)

United Kingdom flagnottingham, United Kingdom
$40.00/hrIntermediateScale AI

Key Skills

Software

Scale AIScale AI

Top Subject Matter

AI Language Models
Stem Domain Expertise
Telecommunications Domain Expertise

Top Data Types

TextText
DocumentDocument

Top Task Types

ClassificationClassification
Object DetectionObject Detection
RLHFRLHF
Fine-tuningFine-tuning
Text SummarizationText Summarization
TranscriptionTranscription
Computer Programming/CodingComputer Programming/Coding
Evaluation/RatingEvaluation/Rating
Data CollectionData Collection
Prompt + Response Writing (SFT)Prompt + Response Writing (SFT)
Question AnsweringQuestion Answering
Text GenerationText Generation
SegmentationSegmentation

Freelancer Overview

AI Training Contributor (Freelance). Brings 5+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Scale AI. Education includes Master of Science, University of Nottingham (2025) and Bachelor of Science, Kwame Nkrumah University of Science and Technology (2023). AI-training focus includes data types such as Text and labeling workflows including Evaluation and Rating.

IntermediateEnglish

Labeling Experience

Scale AI

AI Training Contributor (Freelance)

Scale AIText
Contributed to large language model training by evaluating AI-generated responses across multiple projects. Assessed accuracy, helpfulness, coherence, and safety using project-specific rubrics and wrote structured justifications for each evaluation. Performed prompt rating and adversarial prompt engineering to test model robustness, with a focus on technical and STEM topics. • Fact-checked and flagged hallucinations or factual errors with supporting reasoning. • Maintained consistent quality scores across large-scale annotation batches. • Adapted to evolving project specifications and calibration updates quickly. • Used remote freelancing workflows and handled high-volume tasks efficiently.

Contributed to large language model training by evaluating AI-generated responses across multiple projects. Assessed accuracy, helpfulness, coherence, and safety using project-specific rubrics and wrote structured justifications for each evaluation. Performed prompt rating and adversarial prompt engineering to test model robustness, with a focus on technical and STEM topics. • Fact-checked and flagged hallucinations or factual errors with supporting reasoning. • Maintained consistent quality scores across large-scale annotation batches. • Adapted to evolving project specifications and calibration updates quickly. • Used remote freelancing workflows and handled high-volume tasks efficiently.

2024 - 2025

Education

U

University of Nottingham

Master of Science, Electronic Communications and Computer Engineering

Master of Science
2024 - 2025
K

Kwame Nkrumah University of Science and Technology

Bachelor of Science, Telecommunication Engineering

Bachelor of Science
2019 - 2023

Work History

B

Boots UK

OMS Operative

Beeston
2025 - Present
V

Vine Display Tech

AV and LED Operations Coordinator

Kirkby in Ashfield
2025 - Present