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Derrick Karanja

@derrickkaranja

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Detail-oriented Data Annotator and Prompt Engineer with 5 years experience.

Kenya

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What I'm looking for

I am looking for a role that fosters innovation and collaboration, where I can leverage my skills in data annotation and prompt engineering to contribute to impactful AI projects.

I am a dedicated Data Annotator and Prompt Engineer with over five years of experience in data labeling and annotation across various formats, including images, text, audio, and video. My work is centered around supporting machine learning models by producing high-quality, consistent annotations that enhance AI capabilities. I have a proven track record of optimizing workflows and collaborating effectively with remote teams to exceed quality benchmarks.

Throughout my career, I have successfully annotated over 5,000 data points, achieving significant accuracy improvements in AI models. My expertise in prompt engineering, particularly with large language models like GPT-4 and Claude, has allowed me to develop structured frameworks that enhance e-learning content. I am passionate about building clean datasets that power reliable computer vision and natural language processing models, and I continuously seek opportunities to refine my skills and contribute to innovative AI projects.

Experience

Work history, roles, and key accomplishments

Data Annotation Specialist

CloudFactory

Jul 2024 - Present (11 months)

Labeled and annotated 2D and 3D images for AI model training using tools like Hasty AI. Collaborated with a team to optimize segmentation workflows and refined annotation guidelines to enhance data consistency.

3D Annotation Hasty AI Quality Assurance Hasty.Ai

Tech Volunteer

Lush AI

Jun 2024 - Present (1 year)

Assisted in creating training materials and datasets for aspiring data annotators, improving their understanding of NLP and image annotation techniques. Assisted in annotating and categorizing text data for use in NLP models, ensuring precise tagging and categorization.

NLP Quality Control

Prompt Engineer

SkillCat

Jan 2024 - Present (1 year 5 months)

Developed structured prompt frameworks to generate engaging e-learning content using various Large Language Models (LLMs) such as GPT-4, Gemini, and Claude. Utilized prompting methods like zero-shot, few-shot, and chain-of-thought to fine-tune output quality.

Prompt Engineering Large Language Models Gemini OpenAI Playground PromptPerfect

Data Annotation Specialist

Avala AI

Nov 2023 - Present (1 year 7 months)

Annotated and labeled multi-format data (text, images, audio, and video) according to project-specific guidelines, ensuring consistent and high-quality outputs for machine learning models. Conducted transcription and applied advanced annotations on audio data to enhance model training.

Data Annotation Annotating Quality Control

Data Annotation Mentor

Youth for Tech

Apr 2023 - Present (2 years 2 months)

Conducted workshops on NLP and computer vision annotation practices for early-career professionals, empowering them to contribute to AI projects. Mentored students on how to use annotation tools like Labelbox and CVAT, contributing to the development of AI-ready datasets.

NLP Computer Vision Annotating Labelbox CVAT

Image Segmentation

CVAT AI

Aug 2022 - Present (2 years 10 months)

Conducted detailed image segmentation on over 10,000 images across projects involving autonomous driving and medical imaging, achieving 90%+ accuracy in labeling and categorization. Accurately annotated and labeled data crucial for the training and evaluation of machine learning algorithms.

Segmentation CVAT Autonomous Medical Imaging Machine Learning Algorithms Data Labeling

Data Annotator (Intern)

Klatch Technologies

May 2022 - Present (3 years 1 month)

Reviewed annotation guidelines to improve data quality and consistency. Participated in projects involving text data annotation, entity recognition, and multiple-choice question generation.

Annotating Data Annotation Workflow Optimization Documentation

Data Annotator

Remotasks

Dec 2021 - Present (3 years 6 months)

Labeled and tagged data for machine learning projects, ensuring high accuracy and quality to support AI model training. Managed a variety of annotation tasks, including bounding box and segmentation, for computer vision and natural language processing projects.

Data Labeling Machine Learning Bounding Box Segmentation Quality Assurance

Data Annotator

Digital Divide Data

Jan 2021 - Present (4 years 5 months)

Labeled objects in images using bounding boxes and segmentation techniques to support computer vision models. Annotated and labeled various data types, including images, videos, and point clouds.

Bounding Boxes Segmentation Computer Vision