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Michael Githu

@michaelgithu

Data annotation specialist at Appen, Toloka, Scale AI and TELUS International, annotating 3D LiDAR objects across frames.

Kenya

Message

What I'm looking for

I’m seeking to apply my skills in 3D LiDAR point-cloud annotation, oriented bounding boxes, object classification and multi-frame tracking to autonomous driving and physical AI datasets.

At Appen, Toloka, Scale AI and TELUS International, I annotate 2D images and LiDAR point clouds, placing oriented 3D bounding boxes and maintaining object IDs across consecutive frames. I also handle segmentation and keypoints, following project guidelines and flagging ambiguous or unsuitable samples for review.

I built a Python-based image-quality assessment workflow using Anthropic Vision API to assess sharpness, noise, compression artifacts and exposure. I’m seeking to apply my annotation experience to 3D LiDAR point clouds, object classification and multi-frame tracking for autonomous driving and physical AI datasets.

Experience

Work history, roles, and key accomplishments

Current

Search Quality Rater

Current

Lionbridge

Jan 2025 - Present (1 year 9 months)

Evaluate search results against user queries using structured relevance, quality, trustworthiness, and freshness guidelines. Apply Kenyan and East African context when assessing local search intent and flag spam or policy-violating content.

Search Quality Evaluation Relevance Assessment Quality Guidelines Spam Detection Policy Compliance

Current

Freelance Audio Annotator and Swahili Transcriptionist

Current

Appen

Jan 2024 - Present (2 years 9 months)

Annotate Swahili speech data and produce English-to-Swahili transcription or translation outputs for AI training datasets. Apply project-specific conventions for verbatim transcription, disfluencies, speaker turns, and non-speech events.

Audio Annotation Swahili Transcription Translation Speech Data Transcription Style Guidelines

Current

2D and 3D Image Annotation Specialist

Current

Appen, Toloka, Scale AI and TELUS International

Jan 2022 - Present (4 years 9 months)

Complete 2D image annotation tasks including bounding boxes, polygon segmentation, and keypoint placement. Annotate LiDAR point clouds with oriented 3D bounding boxes and maintain consistent object IDs across frames.

2D Annotation 3D Annotation Bounding Boxes Polygon Segmentation Keyword Placement Point Clouds Oriented Bounding Boxes Object ID Tracking Semantic Segmentation Blender Image Quality Checks

Speech Data Annotator

Defined.ai

Jun 2023 - Dec 2023 (6 months)

Annotated spontaneous and scripted Swahili dialogue, including speaker turns, regional language variation, and orthographic normalization. Participated in calibration and applied project guidelines to support consistent speech-data quality.

Speech Annotation Swahili Language Orthographic Normalization Calibration Quality Assurance

Swahili Captioning and English-to-Swahili Translation Assistant

TransPerfect

Mar 2023 - May 2023 (2 months)

Produced time-aligned Swahili captions and English-to-Swahili translations for broadcast, educational, and documentary content. Reviewed machine-generated transcripts and corrected linguistic errors while maintaining consistent captioning conventions.

Swahili Captioning Translation Transcription Time Aligned Captions Linguistic Review

Education

Degrees, certifications, and relevant coursework

Technical University of Kenya

Bachelor of Science, Information Technology

2024 -

Pursuing a Bachelor of Science in Information Technology, with coursework in Natural Language Processing, Human-Computer Interaction, Database Systems, and Digital Communications.