Robert O.

Key Skills

Software

No software listed

Top Subject Matter

LLM evaluation

RLHF feedback

instruction-following prompt datasets

Top Data Types

Text

Image

Document

Top Task Types

RLHF

Entity (NER) Classification

Freelancer Overview

Senior AI Trainer & Prompt Specialist (Freelance). Brings 2+ years of professional experience across legal operations, contract review, compliance, and structured analysis. Core strengths include Outlier AI, Telus International, and Internal. Education includes Bachelor of Science, University of Nairobi (2020). AI-training focus includes data types such as Text, Computer Code, and Programming and labeling workflows including RLHF, Entity (NER) Classification, and Computer Programming.

Labeling Experience

Senior AI Trainer & Prompt Specialist (Freelance)

TextRLHF

Provided RLHF data for Tier-1 LLMs by completing 4,500+ annotation tasks while maintaining a 97%+ quality acceptance rate across projects. Produced comparative feedback for fine-tuning teams using A/B ranking to improve response coherence. Delivered bilingual localization support for conversational AI datasets to target East African markets. • Completed 4,500+ RLHF annotation tasks for two Tier-1 LLMs • Designed and tested 800+ instruction-following prompts to stress-test reasoning and generation • Delivered bilingual (English/Swahili) dataset localization with a micro-team of 5 • Supplied A/B ranking feedback for measurable fine-tuning improvements

2022 - Present

Data Annotation Engineer (Contract)

TextEntity (NER) Classification

Annotated NLP training data for intent classification, named entity recognition (NER), and sentiment analysis for major tech clients. Participated in inter-annotator agreement calibration and consistently achieved Cohen’s Kappa > 0.85. Reported edge cases and annotation ambiguities to QA leads, enabling schema updates that improved dataset consistency by ~12%. • Annotated 15,000+ NLP samples (intent, NER, sentiment) • Achieved Cohen’s Kappa > 0.85 during agreement calibration • Escalated systematic edge cases to QA for schema updates • Translated and culturally adapted 5,000+ dialogue turns for chatbot training

2021 - 2021

Junior Software Developer

Supported development of RESTful Python/Django APIs through agile engineering work that later informed AI tooling and data pipeline tasks. Contributed via unit testing and code review, strengthening debugging practices applicable to AI training and evaluation workflows. Participated in internal knowledge-sharing sessions introducing ML model concepts to facilitate transition into AI training.

2020 - 2021

Education

Work History