John L.

Key Skills

Software

Label Studio

Top Subject Matter

English fluency

factual accuracy

tone calibration

Top Data Types

Text

Document

Top Task Types

RLHF

Fine-tuning

Classification

Freelancer Overview

Freelance AI Trainer & Language Evaluator (Independent / Remote). Brings 3+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Label Studio and Hugging Face. Education includes Bachelor of Science, Kingston University London (2021). AI-training focus includes data types such as Text and labeling workflows including RLHF, Fine-tuning, and Classification.

Labeling Experience

Freelance AI Trainer & Language Evaluator (Independent / Remote)

Label StudioTextRLHF

Designed and annotated 10,000+ English training samples for RLHF pipelines across multiple LLM client projects. Produced ranked preference data for model comparison tasks to inform reward model training. Authored detailed style guides and quality rubrics to ensure consistency of AI output evaluation. • RLHF preference/ranking dataset creation for enterprise model comparison • Style guide and quality rubric development for annotation teams • Red-teaming exercises and failure-mode reporting to guide safety fine-tuning • Worked with ML engineers to translate linguistic requirements into quantifiable training signals

2022 - Present

AI Model Training Specialist (TechBridge Solutions)

TextFine-tuningClassification

Fine-tuned transformer-based NLP models (e.g., BERT and GPT variants) for client-specific text classification and generation tasks. Built and maintained dataset pipelines for training data curation, cleaning, and version control. Mentored junior team members on annotation best practices and quality benchmarking. • Dataset curation and cleaning workflows for training sets • Model fine-tuning for classification and text generation tasks • Annotation best practices and quality benchmarking guidance • Preparation of documentation and model cards for consumers

2021 - 2022

Education

Work History