Victor Njoroge

Key Skills

Software

Appen

Other

Top Subject Matter

Conversational AI

Speech Domain Expertise

Image Domain Expertise

Top Data Types

Text

Audio

Image

Document

Top Task Types

Classification

Freelancer Overview

AI Annotator & Model Training Specialist. Brings 9+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Appen and Other. Education includes Bachelor of Arts, Swarthmore College (2021) and Certificate in Full Stack Software Development, Moringa School (2017). AI-training focus includes data types such as Text and Audio and labeling workflows including Evaluation, Rating, and Classification.

Labeling Experience

AI Annotator & Model Training Specialist

AppenText

As an AI Annotator & Model Training Specialist, I was responsible for AI data labeling, model evaluation, and prompt optimization. My role involved refining conversational AI models for natural language understanding and supporting supervised learning pipelines through annotation and data validation. I ensured compliance with data privacy and AI ethics standards while improving model performance. • Conducted comprehensive QA checks and structured metadata to enhance output quality. • Performed prompt testing and iterative feedback for conversational AI. • Collaborated with global teams for large-scale annotation projects. • Utilized AI-centric platforms to streamline workflow and accuracy.

As an AI Annotator & Model Training Specialist, I was responsible for AI data labeling, model evaluation, and prompt optimization. My role involved refining conversational AI models for natural language understanding and supporting supervised learning pipelines through annotation and data validation. I ensured compliance with data privacy and AI ethics standards while improving model performance. • Conducted comprehensive QA checks and structured metadata to enhance output quality. • Performed prompt testing and iterative feedback for conversational AI. • Collaborated with global teams for large-scale annotation projects. • Utilized AI-centric platforms to streamline workflow and accuracy.

2021 - Present

AI Data Training & Annotation Intern

OtherAudioClassification

As an AI Data Training & Annotation Intern, I specialized in data labeling for speech, image, and text classification. I performed dataset validation and quality assurance to support model development. I identified and mitigated data bias to increase AI model fairness and reliability. • Labeled and annotated diverse data types for supervised learning. • Conducted practical validation of labeled datasets for accuracy. • Applied AI ethics and privacy best practices. • Produced detailed documentation of data handling procedures.

As an AI Data Training & Annotation Intern, I specialized in data labeling for speech, image, and text classification. I performed dataset validation and quality assurance to support model development. I identified and mitigated data bias to increase AI model fairness and reliability. • Labeled and annotated diverse data types for supervised learning. • Conducted practical validation of labeled datasets for accuracy. • Applied AI ethics and privacy best practices. • Produced detailed documentation of data handling procedures.

2019 - 2020

Education

Work History