Sammy Gitau

Key Skills

Software

Appen

Clickworker

CrowdSource

Data Annotation Tech

Remotasks

Scale AI

Top Subject Matter

No subject matter listed

Top Data Types

Computer Code Programming

Image

Top Label Types

Classification

Computer Programming Coding

Freelancer Overview

I am an ICT professional and full-stack developer with a strong background in data management, system testing, and software quality assurance, making me well-suited for roles in data labeling and AI training data. My experience spans developing and maintaining web and mobile applications, conducting both manual and automated software testing, and compiling and analyzing large datasets for reporting and operational improvements. I have hands-on expertise with PHP, JavaScript, MySQL, and tools such as Android Studio and GitHub, as well as experience in data annotation and defect analysis from my roles in government and private sector projects. My work has included maintaining accurate records, performing data quality checks, and implementing test plans for both structured and unstructured data, ensuring reliable and high-quality outputs for projects in areas like traffic analysis, inventory management, and digital transformation initiatives. I am detail-oriented, analytical, and committed to supporting the development of robust AI systems through precise data handling and annotation.

Labeling Experience

Data Labelling

CrowdsourceImageQuestion Answering

It was not really a project but an ongoing training on data labeling.

It was not really a project but an ongoing training on data labeling.

2025 - 2025

Data annotation

Scale AIComputer Code ProgrammingClassification

The project involved comparing code snippets from two different taskers and categorizing the one with the best quality.

The project involved comparing code snippets from two different taskers and categorizing the one with the best quality.

2023 - 2024

Education

Work History