Martin Umana
@martinumana
Detail-oriented data annotator specializing in AI training and evaluation.
NigeriaWhat I'm looking for
I am a detail-oriented remote data annotator and content evaluator with four years' experience supporting AI training and search quality projects for global vendors.
I have delivered high-accuracy annotations across text, image, audio, and video, and supported improvements in search algorithms, speech recognition, and NLP systems.
My background includes roles as a data annotator, online rater, and linguistic annotator where I consistently met quality and performance metrics while collaborating with QA and engineering teams.
I work efficiently with tools such as Appen Connect, TELUS RaterHub, Label Studio and collaboration platforms, and I prioritize guideline compliance, confidentiality, and continuous feedback to improve model outcomes.
Experience
Work history, roles, and key accomplishments
ALCompleted large-scale data annotation and linguistic tagging for AI model training, delivering accuracy and quality scores exceeding project standards and improving search and speech recognition systems.
TIEvaluated search results, ads, and social media content for relevance and user intent, performed high-volume data labeling, and provided linguistic feedback to improve model performance while meeting privacy and accuracy metrics.
RGAnnotated and reviewed multilingual text data for NLP training datasets, collaborated with QA to ensure consistency and adherence to annotation standards, and analyzed guidelines to improve labeling workflows.
Education
Degrees, certifications, and relevant coursework
UCUniversity of Calabar
Bachelor of Science, Linguistics and Communication Studies
Completed a Bachelor of Science in Linguistics and Communication Studies with focus on linguistic analysis and communication theory.
Abia State Polytechnic
Ordinary National Diploma, Accounting
Completed an Ordinary National Diploma in Accounting covering financial accounting, bookkeeping, and basic business finance.
Tech stack
Software and tools used professionally
Availability
Location
NigeriaAuthorized to work in
Job categories
Skills
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