Dennis M

Lidar annotator

Remotasks • Freiberufler

Dec 2018 - Present • 7 yrs 9 mos

I work as a LiDAR Annotator at Remotasks, where I specialize in annotating and labeling LiDAR point cloud data for autonomous driving and machine learning projects. My responsibilities include accurate 3D object annotation (vehicles, pedestrians, cyclists, road features), semantic segmentation, and quality control to ensure high-precision datasets. I follow strict project guidelines, meet tight deadlines, and maintain consistent annotation accuracy to support the development of reliable AI and computer vision models.

Text Annotator

GBSN Research • Freiberufler

Apr 2025 - Feb 2026 • 10 mos

As a Freelance Text Annotator for GBSN Research, I analyzed and structured large volumes of social media data for brand monitoring and market intelligence. My primary role involved identifying and categorizing specific brand mentions, evaluating text context, and assigning precise sentiment scores (positive, negative, or neutral). By applying strict labeling guidelines and maintaining high data accuracy, I helped convert unstructured social conversations into clean, actionable datasets for research and analytical models.

Expert Annotator

Toloka Annotators (Mindrift) • Freiberufler

Apr 2024 - Dec 2025 • 1 yr 8 mos

I worked as an Expert Annotator at Toloka Annotators (Mindrift), contributing to multiple advanced text annotation and AI evaluation projects. My work included large-scale text annotation, prompt evaluation, and response comparison for AI systems. I was a key contributor to the major AI prompt rating project “Computer-Use Agent Preferences,” where we trained a computer-use agent by evaluating multiple outputs, selecting the best response, and providing detailed reasoning for each decision. Due to consistently high accuracy and quality, I was promoted to Computer-Use Agent Preferences QA, where I reviewed annotator work, ensured guideline compliance, maintained annotation consistency, and upheld overall data quality standards for the project.