Celestine Arnold

Key Skills

Software

Appen

Scale AI

Surge AI

Top Subject Matter

Computer Vision

Nlp Domain Expertise

Rlhf Domain Expertise

Top Data Types

Image

Audio

Text

Document

Top Task Types

Bounding Box

Segmentation

Transcription

Freelancer Overview

AI Data Labeling Specialist. Brings 1+ years of professional experience across legal operations, contract review, compliance, and structured analysis. Core strengths include Appen, Scale AI, and Surge AI.

Labeling Experience

AI Data Labeling Specialist

AppenImageBounding Box

As an AI Data Labeling Specialist at Appen, I annotated diverse data types including images, videos, and text for computer vision and NLP model training. My responsibilities included performing bounding box, polygon segmentation, keypoint labeling, and text-based tasks according to strict client guidelines. I also participated in RLHF workflows, contributing to large language model improvements through evaluation and feedback. • Consistently met daily quality and throughput targets above 98% accuracy. • Efficiently flagged edge cases and ambiguous data for senior review. • Maintained annotation quality and adhered to evolving guidelines. • Contributed to ongoing process and schema improvements.

As an AI Data Labeling Specialist at Appen, I annotated diverse data types including images, videos, and text for computer vision and NLP model training. My responsibilities included performing bounding box, polygon segmentation, keypoint labeling, and text-based tasks according to strict client guidelines. I also participated in RLHF workflows, contributing to large language model improvements through evaluation and feedback. • Consistently met daily quality and throughput targets above 98% accuracy. • Efficiently flagged edge cases and ambiguous data for senior review. • Maintained annotation quality and adhered to evolving guidelines. • Contributed to ongoing process and schema improvements.

2026 - Present

Data Labeling & Transcription Specialist

Surge AIAudioTranscription

As a Data Labeling & Transcription Specialist for Surge AI and freelance projects, I transcribed and labeled conversational audio datasets for training voice assistants and chatbots. My work involved intent classification, slot filling, and annotating social media text for toxicity and content moderation. Quality assurance was integral, requiring identification and correction of inconsistencies within large annotation batches. • Collaborated with project coordinators to clarify annotation schemas. • Proofread and quality-checked peer annotations for accuracy. • Maintained consistent annotation standards across projects. • Supported large-scale dataset development for NLP and moderation tools.

As a Data Labeling & Transcription Specialist for Surge AI and freelance projects, I transcribed and labeled conversational audio datasets for training voice assistants and chatbots. My work involved intent classification, slot filling, and annotating social media text for toxicity and content moderation. Quality assurance was integral, requiring identification and correction of inconsistencies within large annotation batches. • Collaborated with project coordinators to clarify annotation schemas. • Proofread and quality-checked peer annotations for accuracy. • Maintained consistent annotation standards across projects. • Supported large-scale dataset development for NLP and moderation tools.

2025 - 2025

AI Training Data Annotator

Scale AIImageSegmentation

During my engagement as an AI Training Data Annotator for Scale AI/Remotasks, I completed over 3,000 annotation tasks across image segmentation, audio transcription, and text evaluation projects. My duties included labeling audio for speech recognition, speaker diarization, noise event tagging, and participating in RLHF tasks for LLM response evaluation. I maintained high inter-annotator agreement and met quality benchmarks for top AI clients. • Demonstrated adaptability across simultaneous multimodal annotation tasks. • Upheld contributor ratings for reliability and accuracy on the Remotasks platform. • Adhered to strict annotation guidelines across diverse data types. • Actively supported high-throughput project delivery.

During my engagement as an AI Training Data Annotator for Scale AI/Remotasks, I completed over 3,000 annotation tasks across image segmentation, audio transcription, and text evaluation projects. My duties included labeling audio for speech recognition, speaker diarization, noise event tagging, and participating in RLHF tasks for LLM response evaluation. I maintained high inter-annotator agreement and met quality benchmarks for top AI clients. • Demonstrated adaptability across simultaneous multimodal annotation tasks. • Upheld contributor ratings for reliability and accuracy on the Remotasks platform. • Adhered to strict annotation guidelines across diverse data types. • Actively supported high-throughput project delivery.

2025 - 2025

Education

Work History