Elmer K.

Key Skills

Software

Other

Data Annotation Tech

Appen

Remotasks

Clickworker

Top Subject Matter

LLM alignment

AI safety

reinforcement learning from human feedback

Top Data Types

Text

3D Sensor

Image

Top Task Types

RLHF

Object Detection

Classification

Freelancer Overview

AI Trainer & RLHF Evaluator — Outlier.ai (Remote). Brings 3+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Other, Data Annotation Tech, and Appen. Education includes Bachelor of Arts, The Cooperative University of Kenya (2024). AI-training focus includes data types such as Text and 3D Sensor and labeling workflows including RLHF, Evaluation, and Rating.

Labeling Experience

AI Trainer & RLHF Evaluator — Outlier.ai (Remote)

OtherTextRLHF

Performed RLHF preference-ranking tasks by evaluating pairs of AI-generated responses for helpfulness, accuracy, safety, and coherence to support reward model training.• Wrote diverse, high-quality prompts to expand LLM training datasets across creative writing, general knowledge, logical reasoning, and real-world problem-solving.• Completed chain-of-thought annotation by verifying mathematical and logical reasoning steps within AI outputs to improve transparency and accuracy.• Conducted safety evaluation by flagging harmful, biased, or misleading content and maintained above-threshold quality scores for premium task access.

2024 - Present

AI Training Specialist & Prompt Engineer — DataAnnotation.tech (Remote)

Data Annotation TechText

Authored and evaluated coding-related prompts across Python, JavaScript, and general programming by rating AI responses for correctness, efficiency, and code clarity.• Applied structured rubrics to rate model responses for factual accuracy, tone, instruction adherence, and formatting quality in LLM evaluation projects.• Annotated long-form text for semantic meaning, intent classification, and topic categorization to support NLP training.• Performed bilingual evaluation combining English and Swahili to enable AI localization for East African markets while completing 500+ tasks with consistently high scores.

2023 - Present

Search Engine Evaluator & Linguistic Analyst — Appen/Lionbridge (Remote)

AppenText

Evaluated search engine results (SERP) for relevance, user intent match, trustworthiness, and content quality using Google and Bing search quality guidelines.• Rated web pages across informational, navigational, and transactional query types, providing structured human feedback to improve ranking performance.• Performed localized East African evaluation for Kenyan and Swahili-speaking users, applying regional cultural and linguistic context to assess relevance and appropriateness.• Assessed advertisements and social media content for policy compliance and quality, including relevance, landing page quality, and user experience.

2022 - 2024

Data Labeler & Image Annotation Specialist — Remotasks (Remote)

Remotasks3D SensorObject Detection

Annotated images for autonomous vehicle datasets by drawing bounding boxes, polygons, and semantic segmentation masks around pedestrians, vehicles, and road infrastructure.• Labeled 3D point cloud data by marking objects in spatial LiDAR datasets used for robotics and autonomous driving AI systems.• Transcribed and labeled audio recordings for speech recognition model training with attention to diverse accents, dialects, and noisy conditions.• Validated and quality-checked annotations from other team members by identifying and correcting systematic errors before client dataset submission.

2022 - 2023

Microtask Specialist & Content Evaluator — Clickworker (Remote)

ClickworkerTextClassification

Completed large volumes of microtasks including text categorization, duplicate content detection, sentiment classification, and web content quality rating.• Wrote short-form product descriptions and content samples used as training data for natural language generation and text summarization models.• Performed structured internet research tasks by verifying business listings, extracting structured data from websites, and validating factual claims against authoritative sources.• Maintained Clickworker’s highest quality tier through consistently above-average accuracy and gained access to better-compensated task categories.

2021 - 2022

Education

Work History