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Leon Freytag

Leon Freytag

LLM Evaluation and Text Generation Specialist in English & German

Switzerland flagDottikon, Switzerland
$28.00/hrEntry LevelData Annotation TechLabelbox

Key Skills

Software

Data Annotation TechData Annotation Tech
LabelboxLabelbox

Top Subject Matter

No subject matter listed

Top Data Types

AudioAudio
DocumentDocument
TextText

Top Task Types

Text Generation
Translation Localization

Freelancer Overview

I am currently working for DataAnnotation.tech, where I contribute to bilingual projects focused on text and image annotation, AI output evaluation, and content quality control. My main strengths are accuracy, attention to detail, and the ability to identify factual, grammatical, and spelling errors quickly and consistently. I enjoy improving model responses and ensuring that AI-generated text is both contextually correct and natural-sounding.

Entry LevelGermanEnglishRussianSpanish

Labeling Experience

Data Annotation Tech

Beluga

Data Annotation TechImageClassificationObject Detection
Comparing Receipts to a specific content

Comparing Receipts to a specific content

2025
Data Annotation Tech

Kardia

Data Annotation TechTextSegmentationText Generation
Having conversations with two chatbots about medical/wellness advice and evaluating it. (chatgpt5 and gemini flash 2.5) Comparison

Having conversations with two chatbots about medical/wellness advice and evaluating it. (chatgpt5 and gemini flash 2.5) Comparison

2025
Data Annotation Tech

NotebookLM

Data Annotation TechVideoObject DetectionEvaluation Rating
Generating specific Videos with NotebookLM and fact checking/finding grammar mistakes in Video and Audio in german

Generating specific Videos with NotebookLM and fact checking/finding grammar mistakes in Video and Audio in german

2025
Data Annotation Tech

Selenite

Data Annotation TechTextRLHFEvaluation Rating
Writing natural & realistic complex prompts that result in a bad response

Writing natural & realistic complex prompts that result in a bad response

2025
Data Annotation Tech

Pulse

Data Annotation TechTextText GenerationText Summarization
Sharing the context of past LMM conversations, creating rubrics for other users being able to create the same conversation with a different model and reaching a specific conversation goal + rating

Sharing the context of past LMM conversations, creating rubrics for other users being able to create the same conversation with a different model and reaching a specific conversation goal + rating

2025

Education

U

University of Applied Sciences Burgenland

Bachelor of Science, Business Law

Bachelor of Science
2018 - 2020
F

Friedrich-Spee-Gymnasium

Abitur, General Education

Abitur
2012 - 2018

Work History

K

KVA Turgi

Mechanical Technician

Turgi
2025 - Present
D

Dottikon Exclusive Synthesis AG

Mechanical Technician

Dottikon
2023 - 2025