Edwin Mwangi

Key Skills

Software

Remotasks

iMerit

Appen

Toloka

Top Subject Matter

Computer Vision

Autonomous Vehicles

Natural Language Processing

Top Data Types

Image

Video

3D Sensor

Audio

Text

Top Task Types

Segmentation

Action Recognition

Object Detection

Transcription

Classification

Entity (NER) Classification

Freelancer Overview

Senior Data Annotation Specialist. Brings 6+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Remotasks, iMerit, and Appen. Education includes Bachelor of Science, University of Nairobi (2020). AI-training focus includes data types such as Image, Video, and 3D Sensor and labeling workflows including Segmentation, Action Recognition, and Object Detection.

Labeling Experience

Senior Data Annotation Specialist

RemotasksAudioTranscription

Annotated and transcribed audio datasets across multiple languages as part of AI model training. Completed more than 500 hours of audio transcription and speech data annotation. Ensured rigorous attention to consistency and transcription accuracy. • Worked on diverse audio projects for speech recognition models. • Utilized platform-specific tools for accurate and efficient audio labeling. • Performed quality assurance on submitted transcriptions. • Collaborated with multilingual annotation teams for coverage across languages.

Annotated and transcribed audio datasets across multiple languages as part of AI model training. Completed more than 500 hours of audio transcription and speech data annotation. Ensured rigorous attention to consistency and transcription accuracy. • Worked on diverse audio projects for speech recognition models. • Utilized platform-specific tools for accurate and efficient audio labeling. • Performed quality assurance on submitted transcriptions. • Collaborated with multilingual annotation teams for coverage across languages.

2022 - Present

Senior Data Annotation Specialist

Remotasks3D SensorObject Detection

Performed LIDAR point cloud annotation for 3D object detection in autonomous vehicle datasets. Specialized in accurately labeling objects within raw point clouds to advance model precision. Used advanced platform tools for visualization and annotation of 3D data. • Consistently achieved high-quality benchmarks in 3D annotation tasks. • Contributed to datasets powering leading autonomous driving systems. • Adhered to quality assurance procedures for LIDAR annotations. • Supported annotation pipeline process optimization for 3D sensor data.

Performed LIDAR point cloud annotation for 3D object detection in autonomous vehicle datasets. Specialized in accurately labeling objects within raw point clouds to advance model precision. Used advanced platform tools for visualization and annotation of 3D data. • Consistently achieved high-quality benchmarks in 3D annotation tasks. • Contributed to datasets powering leading autonomous driving systems. • Adhered to quality assurance procedures for LIDAR annotations. • Supported annotation pipeline process optimization for 3D sensor data.

2022 - Present

Senior Data Annotation Specialist

RemotasksVideoAction Recognition

In this role, provided detailed video descriptions and scene captioning for multimodal AI model training. Annotated video scenes for natural language understanding and computer vision applications. Ensured the consistent high quality of multimodal annotation workflows. • Carried out video scene annotation and captioning for diverse projects. • Consistently delivered annotated data above required quality thresholds. • Facilitated effective collaboration between annotation and quality assurance teams. • Documented best practices for video annotation projects.

In this role, provided detailed video descriptions and scene captioning for multimodal AI model training. Annotated video scenes for natural language understanding and computer vision applications. Ensured the consistent high quality of multimodal annotation workflows. • Carried out video scene annotation and captioning for diverse projects. • Consistently delivered annotated data above required quality thresholds. • Facilitated effective collaboration between annotation and quality assurance teams. • Documented best practices for video annotation projects.

2022 - Present

Senior Data Annotation Specialist

RemotasksImageSegmentation

As a Senior Data Annotation Specialist at Remotasks (Scale AI), annotated large-scale image datasets for computer vision and autonomous vehicle models. Specialized in image segmentation, including semantic and panoptic segmentation, with consistently high accuracy. Executed bounding box, polygon, and keypoint annotations for object detection and pose estimation. • Maintained accuracy rates above 98% for dataset labeling tasks. • Conducted quality assurance reviews to ensure the integrity of annotated data. • Applied custom scripts and platform tools to maximize annotation throughput. • Trained and mentored junior annotators in best practices for data labeling.

As a Senior Data Annotation Specialist at Remotasks (Scale AI), annotated large-scale image datasets for computer vision and autonomous vehicle models. Specialized in image segmentation, including semantic and panoptic segmentation, with consistently high accuracy. Executed bounding box, polygon, and keypoint annotations for object detection and pose estimation. • Maintained accuracy rates above 98% for dataset labeling tasks. • Conducted quality assurance reviews to ensure the integrity of annotated data. • Applied custom scripts and platform tools to maximize annotation throughput. • Trained and mentored junior annotators in best practices for data labeling.

2022 - Present

Data Annotation Specialist

ImeritTextEntity Ner Classification

Handled Named Entity Recognition (NER) and relationship extraction for Natural Language Processing (NLP) model training. Labeled entities and relationships in large-scale conversational and textual datasets. Ensured accuracy and adherence to complex guidelines in text annotation. • Worked on medical, conversational, and search datasets requiring precise entity annotation. • Used proprietary tools and QA workflows to improve data quality. • Contributed to model performance improvement through high-quality labeling. • Maintained productivity benchmarks while achieving top quality scores.

Handled Named Entity Recognition (NER) and relationship extraction for Natural Language Processing (NLP) model training. Labeled entities and relationships in large-scale conversational and textual datasets. Ensured accuracy and adherence to complex guidelines in text annotation. • Worked on medical, conversational, and search datasets requiring precise entity annotation. • Used proprietary tools and QA workflows to improve data quality. • Contributed to model performance improvement through high-quality labeling. • Maintained productivity benchmarks while achieving top quality scores.

2022 - 2023

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Education

Work History