Stephen Kamau
@stephenkamau1
Aspiring data scientist and analyst specializing in data annotation and quality control.
What I'm looking for
I am an aspiring data scientist and analyst with a strong foundation in data annotation, transcription, and translation across multilingual contexts. I bring hands-on experience labeling 2D/3D images, LiDAR point clouds, and text datasets for real-world projects.
Throughout my roles at NGOs, crowdsourcing platforms, and freelance marketplaces, I collaborated with senior data scientists and linguists to standardize labels and improve dataset quality. I contributed to projects that reduced labeling errors to under 2% and improved translation accuracy by 32%.
I have practical experience with annotation tools such as CVAT, LabelStudio, and Prodigy, and I perform rigorous quality control, validation, and data transformation tasks. My background in transcription and translation (English↔Swahili) complements my annotation work and supports multilingual model development.
I am detail-oriented, quality-focused, and eager to apply my data interpretation skills and machine learning fundamentals to drive impactful solutions in Kenya's tech ecosystem.
Experience
Work history, roles, and key accomplishments
Translator and Transcriptionist
translateplus
Oct 2023 - Present (2 years 1 month)
Translated and transcribed content between English and Swahili, edited and proofread materials for accuracy and cultural relevance, and ensured linguistic quality for client deliverables.
Provided freelance data annotation and validation services including English–Swahili translation, structured data transcription, and quality control for annotations, handling enums, handwritten text, and standardization.
Data Annotation Specialist
OneForma
Jan 2025 - Jun 2025 (5 months)
Reviewed and validated document fields from image crops, transcribed values into structured datasets, and translated field names and descriptions from English to Dutch while enforcing formatting and transformation rules.
Annotated 2D images, 3D point clouds and LiDAR to label vehicles, pedestrians and infrastructure, ensuring consistency with annotation guidelines and improving dataset accuracy for perception tasks.
Transcriptionist QA Specialist
GoTranscript
Aug 2018 - Oct 2023 (5 years 2 months)
Reviewed and produced accurate transcripts from audio/video, performed proofreading and editing to correct grammar and formatting, and selected or reworked transcripts to ensure highest accuracy standards.
AI Data Annotator
DataKind Kenya
May 2019 - Mar 2023 (3 years 10 months)
Assisted in annotating image and text datasets for social-impact projects, implemented data quality checks, and collaborated with senior data scientists to ensure adherence to project specifications.
Education
Degrees, certifications, and relevant coursework
Maseno University
Bachelor of Arts, Language and Communication
2020 - 2024
Pursued a Bachelor of Arts in Language and Communication with IT, focusing on linguistics, communication studies, and information technology applications.
Kisii University
Bachelor of Commerce, Accounting
2013 - 2017
Completed a Bachelor of Commerce in Accounting with coursework and projects focused on accounting principles and financial reporting.
Tech stack
Software and tools used professionally
Availability
Location
Authorized to work in
Job categories
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