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Brian N.

Data Annotation Specialist — e2f

Kenya flagNairobi, Kenya

Key Skills

Software

Other
SuperAnnotateSuperAnnotate

Top Subject Matter

Conversational AI and reasoning dataset evaluation
Medical imaging (healthcare diagnostics)
Geospatial and autonomous driving datasets

Top Data Types

TextText
ImageImage
DocumentDocument

Top Task Types

DiagnosisDiagnosis
MappingMapping
Fine-tuningFine-tuning
Object DetectionObject Detection
Text GenerationText Generation

Freelancer Overview

Data Annotation Specialist — e2f. Core strengths include Other and SuperAnnotate. Education includes Engineering Studies, Athena Global Education (2023). AI-training focus includes data types such as Text, Image, and Geospatial and labeling workflows including Evaluation, Rating, and Diagnosis.

Labeling Experience

AI Data Specialist — Goodnotes

Other

Led multimodal annotation projects across text, image, audio, and video datasets to support AI model training and evaluation. Performed LLM response analysis and quality evaluations to improve reasoning, factual accuracy, and response alignment. Designed prompts and edge-case scenarios to stress-test AI systems and identify inconsistencies, hallucinations, and performance gaps. • Conducted multimodal annotation for training and evaluation datasets • Evaluated LLM outputs for reasoning quality and factual correctness • Built prompt and edge-case scenarios for robustness testing • Ran A/B testing to compare outputs and detect gaps

2024 - Present

Data Annotation Specialist — e2f

OtherTextText

Evaluated AI-generated outputs using structured rubrics for usefulness, completeness, accuracy, and consistency across conversational reasoning tasks. Conducted quality assurance reviews to improve model reliability and logical performance. Built benchmarking prompts to surface weaknesses in AI behavior and support downstream evaluation improvements. • Labeled conversational AI dataset entries involving reasoning and contextual understanding • Performed consistency and accuracy checks using rubric-based scoring • Provided detailed QA feedback to guide model improvements • Designed evaluation prompts to stress-test and benchmark responses

2024 - 2025

Data Labeler (Reviewer) — Focal Systems

OtherImageImageObject DetectionObject Detection

Trained computer vision systems using over 2 million labeled retail images. Reviewed and validated annotation quality to improve workflow efficiency and reduce labeling errors. Supported AI automation systems through accurate object recognition and scenario labeling. • Produced and maintained large-scale image annotations for CV training • Performed annotation review/validation for quality control • Labeled objects and retail scene elements for automation • Helped improve labeling workflow throughput by reducing errors

2021 - 2023

Medical Data Annotator — RetinAI

OtherImageImageDiagnosisDiagnosis

Annotated clinical imaging datasets for AI-assisted healthcare diagnostic systems. Conducted technical QA reviews to ensure precision and maintain high-quality dataset standards. Followed specialized medical annotation protocols for imaging workflows. • Added clinical image labels for diagnostic use cases • Performed QA validation to reduce annotation errors • Adapted to medical imaging labeling procedures • Ensured dataset quality for downstream healthcare AI training

2022 - 2022

Map Data Annotator — Gatik

OtherMappingMapping

Annotated autonomous driving and geospatial datasets including lane markings, navigation paths, and traffic-related features. Generated accurate map-based AI data to support machine learning systems. Validated annotations to improve the quality of geospatial training inputs. • Labeled lane markings and roadway features • Marked navigation paths and traffic elements • Supported map-based AI data generation • Contributed to training data accuracy for autonomous systems

2020 - 2021

Education

A

Athena Global Education

Engineering Studies, Engineering Studies

Engineering Studies
2022 - 2023

Work History

I

instadeep kenya

ai data associate

Nairobi
2021 - 2023