Johnstone I.

Key Skills

Software

Appen

Don't disclose

Top Subject Matter

Swahili-language AI content evaluation and linguistic review

Bilingual content moderation and labeling for social media

Swahili media research data transcription and categorization

Top Data Types

Text

Video

Audio

Image

Top Task Types

Classification

Transcription

Freelancer Overview

Freelance Data Annotator & Linguistic Reviewer — Appen (Remote). Brings 3+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Appen and Don't disclose. Education includes Master of Arts, University of Nairobi (2021) and Bachelor of Arts, Kenyatta University (2019). AI-training focus includes data types such as Text, Video, and Audio and labeling workflows including Evaluation, Rating, and Classification.

Labeling Experience

Freelance Data Annotator & Linguistic Reviewer — Appen (Remote)

AppenText

Annotated and labeled over 15,000 data points for AI training pipelines supporting Swahili-language models. Performed pairwise comparisons of AI-generated Swahili text to evaluate coherence, fluency, cultural accuracy, and overall quality. Conducted quality assurance reviews of peer annotations, maintaining personal accuracy above 96%. • Pairwise comparison judgment for Swahili text quality • Coherence, fluency, and cultural accuracy evaluation • Peer-review QA for labeling consistency • Maintain accuracy targets above 96%

2023 - Present

Communications & Research Assistant — Kenya Institute of Mass Communication (KIMC)

Don't discloseAudioTranscription

Transcribed and categorized audio-visual data for research projects focused on Swahili media content and language use. Prepared bilingual (Swahili–English) reports summarizing findings for departmental publications and external stakeholders. Maintained structured databases to ensure data integrity and consistency across multiple studies. • Transcription and categorization of audio-visual data • Bilingual reporting (Swahili–English) for stakeholders • Structured database management for research integrity • Support structured data collection from interviews and surveys

2021 - 2022

Social Media & Content Coordinator (Part-time) — Start Up Nairobi Hub

Don't discloseVideoClassification

Created and evaluated bilingual (Swahili–English) digital content with labeling and moderation standards for user-generated posts. Flagged policy violations with high precision and consistency to support AI moderation and training needs. Monitored and reported content performance trends using data dashboards, producing weekly analytical summaries. • Apply content labeling and moderation standards • Policy-violation flagging for moderation datasets • Track content performance trends via dashboards • Weekly reporting of analytics and outcomes

2020 - 2021

Education

Work History