For employers

Hire this AI Trainer

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

LoginCreate account
Invite to Job
N

Niklas Fuest

Data Annotator and AI Training Specialist for various platforms

Germany flagMülheim an der Ruhr, Germany
$30.00/hrIntermediateOtherLabelboxGoogle Cloud Vertex AI

Key Skills

Software

Other
LabelboxLabelbox
Google Cloud Vertex AIGoogle Cloud Vertex AI

Top Subject Matter

General AI/ML
AI-Generated Content

Top Data Types

TextText
VideoVideo
ImageImage

Top Task Types

Classification
Text Generation
RLHF
Data Collection
Evaluation Rating
Question Answering
Object Detection

Freelancer Overview

I have over a year of hands-on experience in AI training, data annotation, and data labeling, working across multiple platforms simultaneously. Through Outlier, I contributed to several AI projects, including Cacatua Chorus V1 & V2 and Aether, where I built a strong foundation in diverse annotation workflows. Alongside that, I completed hundreds of AI training studies through Prolific, which really sharpened my consistency and attention to detail. More recently, with Alignerr, I've taken on more specialized responsibilities, including content reviewing, text-to-speech evaluation across multiple model versions, and story ranking as a labeler. These experiences have given me a well-rounded skill set across text, audio, and qualitative feedback tasks. I'm comfortable working within structured AI pipelines, and I understand how quality annotation directly impacts model performance, which is something I take seriously in every project I work on.

IntermediateEnglishGerman

Labeling Experience

Reviewer and Data Labeler, Alignerr

TextClassification
At Alignerr, I worked on several diverse projects in both reviewer and labeler roles. My responsibilities included rating, ranking, and annotating text for AI model training and evaluation. The projects Rainforest, TTS v6-v8, and Story Ranking focused on improving AI-generated content. • Annotated, reviewed, and classified text data for various AI tasks • Provided detailed quality assurance and error correction ratings • Helped design and refine annotation guidelines for new projects • Offered domain expertise to enhance model performance and reliability

At Alignerr, I worked on several diverse projects in both reviewer and labeler roles. My responsibilities included rating, ranking, and annotating text for AI model training and evaluation. The projects Rainforest, TTS v6-v8, and Story Ranking focused on improving AI-generated content. • Annotated, reviewed, and classified text data for various AI tasks • Provided detailed quality assurance and error correction ratings • Helped design and refine annotation guidelines for new projects • Offered domain expertise to enhance model performance and reliability

2026 - Present

AI Study Participant and Evaluator, Prolific

OtherTextClassification
During my tenure at Prolific, I completed hundreds of studies specifically related to AI training and evaluation. My primary responsibilities included participating in structured evaluations designed to improve the quality and fairness of AI systems. The work emphasized accuracy, consistency, and unbiased judgment. • Assessed and rated AI model outputs for natural language and reasoning • Provided detailed feedback to inform iterative improvements for AI systems • Participated in experimental studies to identify AI model strengths and weaknesses • Ensured strict adherence to study protocols and standards

During my tenure at Prolific, I completed hundreds of studies specifically related to AI training and evaluation. My primary responsibilities included participating in structured evaluations designed to improve the quality and fairness of AI systems. The work emphasized accuracy, consistency, and unbiased judgment. • Assessed and rated AI model outputs for natural language and reasoning • Provided detailed feedback to inform iterative improvements for AI systems • Participated in experimental studies to identify AI model strengths and weaknesses • Ensured strict adherence to study protocols and standards

2025 - Present

Data Annotator and AI Training Specialist, Outlier

TextClassification
As a data annotator and AI trainer at Outlier, I participated in multiple cutting-edge projects focused on AI model optimization. I performed comprehensive data labeling, annotation, and reviewing tasks throughout the lifecycle of the Cacatua Chorus V1, Cacatua Chorus V2, and Aether projects. My contributions significantly enhanced data quality and model performance. • Annotated and labeled large volumes of text data for diverse AI training tasks • Supported AI workflows by evaluating output accuracy and labeling correctness • Participated in feedback and quality assurance loops for continuous improvement • Collaborated with cross-functional teams to deliver high-quality annotated datasets

As a data annotator and AI trainer at Outlier, I participated in multiple cutting-edge projects focused on AI model optimization. I performed comprehensive data labeling, annotation, and reviewing tasks throughout the lifecycle of the Cacatua Chorus V1, Cacatua Chorus V2, and Aether projects. My contributions significantly enhanced data quality and model performance. • Annotated and labeled large volumes of text data for diverse AI training tasks • Supported AI workflows by evaluating output accuracy and labeling correctness • Participated in feedback and quality assurance loops for continuous improvement • Collaborated with cross-functional teams to deliver high-quality annotated datasets

2025 - Present

Education

F

FOM Hochschule für Oekonomie & Management

Bachelor of Science, Business Informatics

Bachelor of Science
2022 - 2026
I

IU Internationale Hochschule

Bachelor of Arts, Social Work

Bachelor of Arts
2018 - 2022

Work History

A

Aldi International Services

IT Professional

Mülheim an der Ruhr
2026 - Present
E

E-Commerce

Owner – E-Commerce Business

N/A
2019 - Present