For employers

Hire this AI Trainer

Sign in or create an account to invite AI Trainers to your job.

Invite to Job
S

Sabina Ghafari

Freelance AI Data Annotator / AI Trainer

GERMANY flag
Ludwigshafen am Rhein, Germany
$20.00/hrIntermediateAppenData Annotation TechOneforma

Key Skills

Software

AppenAppen
Data Annotation TechData Annotation Tech
OneFormaOneForma
TelusTelus
ClickworkerClickworker
Other

Top Subject Matter

Data Annotation – RLHF, Red Teaming, Transcription QA, Prompt-Response Writing, Image Annotation
Healthcare – Clinical Data Annotation, Medical Transcription QA, Clinical Documentation Review, Medical Content Review
E-Commerce – Product Categorization, Product Taxonomy, Customer Support QA, Search Relevance, Catalog Content Evaluation

Top Data Types

TextText
ImageImage
DocumentDocument

Top Task Types

Evaluation Rating
Transcription
Red Teaming
RLHF
Text Summarization
Question Answering
Text Generation
Object Detection
Prompt Response Writing SFT
Data Collection
Function Calling
Segmentation
Classification
Bounding Box
Entity Ner Classification
Fine Tuning
Point Key Point

Freelancer Overview

I have hands-on experience in data labeling and AI training data across multiple task types and platforms, including text, audio, and image-based work. My work has included RLHF, red teaming, prompt-response writing and SFT-style tasks, transcription review and correction, quality evaluation and rating, data collection, and bounding-box image annotation. I have evaluated AI-generated outputs for naturalness, accuracy, factual consistency, instruction adherence, and overall quality, compared alternative responses, written rationales to justify decisions, and contributed to the creation of high-quality example outputs for model improvement. I have also reviewed AI-generated transcriptions for orthography and completeness, corrected them when needed, and fully re-transcribed content when the AI output was too inaccurate to be usable. What sets me apart is the combination of strong linguistic sensitivity and structured analytical judgment. As a native German speaker with strong English skills, I can work effectively in both languages, including multilingual and code-switching contexts, and I pay close attention to tone, nuance, phrasing, register, and cultural fit. In addition to text-based work, I have experience with audio tasks for LLM-related projects and image annotation for computer vision workflows, which gives me broader exposure than candidates who have only worked in one modality. I am comfortable following detailed guidelines, identifying subtle quality differences, analyzing error patterns, and contributing reliable human judgment across a wide range of AI training workflows.

IntermediateEnglishGermanArabicRussianPersian FarsiFrench

Labeling Experience

Freelance AI Transcription Reviewer / Language QA Specialist

AudioTranscription
-Reviewed AI-generated transcriptions for orthography, completeness, and overall accuracy -Corrected transcription errors and fully re-transcribed content when AI outputs were too inaccurate or incomplete -Analyzed transcription error patterns and assessed issue severity -Applied strong linguistic judgment in German and English audio-related tasks

-Reviewed AI-generated transcriptions for orthography, completeness, and overall accuracy -Corrected transcription errors and fully re-transcribed content when AI outputs were too inaccurate or incomplete -Analyzed transcription error patterns and assessed issue severity -Applied strong linguistic judgment in German and English audio-related tasks

2026 - Present

Image Annotator

ImageBounding Box
- Annotated image-based data using bounding boxes for AI training tasks - Marked and labeled relevant objects in images according to project guidelines - Maintained accuracy and consistency across annotation tasks - Followed detailed instructions to ensure high-quality computer vision training data - Contributed to the preparation of structured visual datasets for machine learning models

- Annotated image-based data using bounding boxes for AI training tasks - Marked and labeled relevant objects in images according to project guidelines - Maintained accuracy and consistency across annotation tasks - Followed detailed instructions to ensure high-quality computer vision training data - Contributed to the preparation of structured visual datasets for machine learning models

2025 - Present

Freelance Prompt-Response Writer / AI Content Specialist

TextPrompt Response Writing SFT
-Created high-quality prompt-response pairs to support AI training and supervised fine-tuning workflows -Wrote structured, high-quality example answers designed to demonstrate ideal model behavior -Refined responses for clarity, naturalness, relevance, and instruction adherence -Helped define what strong AI outputs should look like across different prompt types and task formats -Applied strong linguistic judgment in German and English, with close attention to tone, phrasing, nuance, and overall response quality

-Created high-quality prompt-response pairs to support AI training and supervised fine-tuning workflows -Wrote structured, high-quality example answers designed to demonstrate ideal model behavior -Refined responses for clarity, naturalness, relevance, and instruction adherence -Helped define what strong AI outputs should look like across different prompt types and task formats -Applied strong linguistic judgment in German and English, with close attention to tone, phrasing, nuance, and overall response quality

2025 - Present

Freelance AI Quality Evaluator / Rater

TextEvaluation Rating
-Evaluated AI-generated outputs for naturalness, accuracy, relevance, instruction adherence, and overall quality -Compared alternative responses and assigned ratings based on detailed evaluation criteria -Wrote clear rationales to justify ratings and ranking decisions -Reviewed outputs across text, audio, image, and other AI-related task formats

-Evaluated AI-generated outputs for naturalness, accuracy, relevance, instruction adherence, and overall quality -Compared alternative responses and assigned ratings based on detailed evaluation criteria -Wrote clear rationales to justify ratings and ranking decisions -Reviewed outputs across text, audio, image, and other AI-related task formats

2025 - Present

Freelance AI Red Teaming Specialist

TextRed Teaming
Tested AI systems with challenging and adversarial prompts to identify weaknesses, edge cases, and failure patterns Evaluated model robustness, safety, and instruction-following under difficult or ambiguous conditions Documented problematic outputs and analyzed recurring failure modes Contributed to improving model reliability through structured stress testing

Tested AI systems with challenging and adversarial prompts to identify weaknesses, edge cases, and failure patterns Evaluated model robustness, safety, and instruction-following under difficult or ambiguous conditions Documented problematic outputs and analyzed recurring failure modes Contributed to improving model reliability through structured stress testing

2025 - Present

Education

T

Technische Universität Darmstadt

Bachelor of Science, Computer Science

Bachelor of Science
2013 - 2017
G

Goethe-Universität Frankfurt

Not Completed, Human Medicine

Not Completed
2012 - 2013

Work History

P

Pond Security Service

Senior Security Officer

Mannheim
2020 - Present
M

Medpex Versandapotheke

Customer Service Representative

Ludwigshafen am Rhein
2017 - 2020