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Rikkie Kibata

Rikkie Kibata

AI Training Specialist with PhD in Physics & Math | Expert in AI

USA flagARIZONA, Usa
$40.00/hrExpertAppenClickworkerData Annotation Tech

Key Skills

Software

AppenAppen
ClickworkerClickworker
Data Annotation TechData Annotation Tech
LabelboxLabelbox
MercorMercor
MindriftMindrift
OneFormaOneForma
RemotasksRemotasks
Scale AIScale AI

Top Subject Matter

No subject matter listed

Top Data Types

AudioAudio
Computer Code ProgrammingComputer Code Programming
TextText

Top Task Types

Action RecognitionAction Recognition
Bounding BoxBounding Box
ClassificationClassification
Computer Programming/CodingComputer Programming/Coding
Data CollectionData Collection

Freelancer Overview

I am a PhD graduate in Physics and Applied Mathematics from the University of Oxford, with over three years of experience in AI data annotation, evaluation, and quality assurance. I have worked with notable AI platforms such as Mindrift, Labelbox, OneForma, and Scale AI, focusing on text evaluation, LLM prompt engineering, rubric development, and scientific data analysis. My expertise lies in ensuring the accuracy and ethical alignment of AI outputs in STEM-related content, designing prompts, creating grading rubrics, and conducting QA reviews to improve model reasoning and consistency. My strong background in mathematics, physics, and programming enables me to analyze complex datasets with precision, making me adept in rigorous evaluation and annotation tasks.

ExpertDutchFrenchEnglish

Labeling Experience

Mindrift

LLM Evaluation and Prompt Engineering for STEM AI Training

MindriftTextRLHFFine Tuning
Participated in a large-scale AI training and evaluation project focused on enhancing the reasoning, factual accuracy, and instructional quality of LLM outputs. Tasks included designing and refining prompts, evaluating AI-generated responses across STEM disciplines, and applying detailed rubrics to assess factuality, logical coherence, and ethical compliance. Contributed to fine-tuning datasets for supervised and reinforcement learning (RLHF) pipelines, ensuring consistent data quality through multi-stage review and QA processes. Worked collaboratively with international annotation teams, maintaining over 98% accuracy in audit scores and providing feedback that improved model reliability and linguistic fluency.

Participated in a large-scale AI training and evaluation project focused on enhancing the reasoning, factual accuracy, and instructional quality of LLM outputs. Tasks included designing and refining prompts, evaluating AI-generated responses across STEM disciplines, and applying detailed rubrics to assess factuality, logical coherence, and ethical compliance. Contributed to fine-tuning datasets for supervised and reinforcement learning (RLHF) pipelines, ensuring consistent data quality through multi-stage review and QA processes. Worked collaboratively with international annotation teams, maintaining over 98% accuracy in audit scores and providing feedback that improved model reliability and linguistic fluency.

2023 - 2025
Scale AI

AI Quality Assurance and Evaluation for Scientific & Educational Data

Scale AIComputer Code ProgrammingClassificationRLHF
Contributed to large-scale AI data labeling and evaluation projects designed to improve educational and scientific reasoning models. Performed high-precision evaluation and rubric-based rating of AI-generated text, focusing on factual accuracy, clarity, and alignment with scientific principles. Authored and reviewed prompts and responses for training advanced LLMs in physics, mathematics, and applied reasoning. Implemented multi-stage quality checks and consistency reviews to maintain top-tier data integrity. Collaborated with diverse annotation teams to standardize evaluation criteria and achieve over 98% QA compliance. The project spanned multiple annotation cycles, with continuous fine-tuning based on feedback from model trainers and auditors.

Contributed to large-scale AI data labeling and evaluation projects designed to improve educational and scientific reasoning models. Performed high-precision evaluation and rubric-based rating of AI-generated text, focusing on factual accuracy, clarity, and alignment with scientific principles. Authored and reviewed prompts and responses for training advanced LLMs in physics, mathematics, and applied reasoning. Implemented multi-stage quality checks and consistency reviews to maintain top-tier data integrity. Collaborated with diverse annotation teams to standardize evaluation criteria and achieve over 98% QA compliance. The project spanned multiple annotation cycles, with continuous fine-tuning based on feedback from model trainers and auditors.

2021 - 2021

Education

U

University of Oxford

Doctor of Philosophy, Physics and Applied Mathematics

Doctor of Philosophy
2015 - 2019
U

University of Arizona

Master of Science, Theoretical Physics

Master of Science
2013 - 2015

Work History

M

Mindrift

AI Data Specialist & Annotator

Arizona
2023 - 2025
L

Labelbox

AI Quality Assurance Analyst

Arizona
2021 - 2022