I'm Phil Mumba, a detail-oriented NLP Data Annotator with 3+ years of experience labeling, classifying, and evaluating large-scale text datasets for AI and LLM systems. I specialize in sentiment labeling, intent classification, entity tagging, and text categorization across multilingual data, and I enjoy turning complex datasets into clean, reliable training material. I work closely with cross-functional teams to maintain annotation guidelines, ensure quality and consistency, and push improvements in model performance through rigorous QA and iterative feedback. Fluent in Kiswahili and English, I support chatbots, search, and language-understanding models with clear communication and a friendly, collaborative approach.

Phil Mumba

I'm Phil Mumba, a detail-oriented NLP Data Annotator with 3+ years of experience labeling, classifying, and evaluating large-scale text datasets for AI and LLM systems. I specialize in sentiment labeling, intent classification, entity tagging, and text categorization across multilingual data, and I enjoy turning complex datasets into clean, reliable training material. I work closely with cross-functional teams to maintain annotation guidelines, ensure quality and consistency, and push improvements in model performance through rigorous QA and iterative feedback. Fluent in Kiswahili and English, I support chatbots, search, and language-understanding models with clear communication and a friendly, collaborative approach.

Available to hire

I’m Phil Mumba, a detail-oriented NLP Data Annotator with 3+ years of experience labeling, classifying, and evaluating large-scale text datasets for AI and LLM systems. I specialize in sentiment labeling, intent classification, entity tagging, and text categorization across multilingual data, and I enjoy turning complex datasets into clean, reliable training material.

I work closely with cross-functional teams to maintain annotation guidelines, ensure quality and consistency, and push improvements in model performance through rigorous QA and iterative feedback. Fluent in Kiswahili and English, I support chatbots, search, and language-understanding models with clear communication and a friendly, collaborative approach.

See more

Language

Swahili
Fluent
English
Fluent
Spanish; Castilian
Intermediate

Work Experience

AI Consultant at Aventure
June 1, 2024 - Present
Annotate and evaluate 40,000+ multilingual dialogue samples for LLM training; provide model guidance and evaluation; ensure data quality and guideline compliance.
Swahili NLP Annotator & Linguistic Consultant at Freelance
July 1, 2022 - Present
Created and annotated Swahili datasets for machine translation, chatbot, and TTS systems; labeled multi- intents and code-switch dialogue datasets; performed error analysis and data validation; reduced TTS error rate by 12%.
AI Data Trainer at Samasource
May 1, 2022 - January 1, 2025
Labeled and reviewed 250,000+ text samples across NER, sentiment, and classification projects; led a team of 6 annotators; implemented QA processes; contributed to model performance improvements (10-15% F1 score) and workflow efficiency.

Education

Bachelor of Education (Arts) – Kiswahili at Chuka University
January 11, 2030 - June 11, 2026
Machine Learning in NLP Specialization at Coursera
January 11, 2030 - June 11, 2026
Certificate – Prompt Engineering Languages at Online (Self-paced)
January 11, 2030 - June 11, 2026

Qualifications

Prompt Engineering Languages Certificate
January 11, 2030 - June 11, 2026

Industry Experience

Software & Internet, Professional Services, Media & Entertainment, Education