David Harper
Data Scientist @Welo Data
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WORK HISTORY
Data Scientist @Welo Data
Led a comprehensive multilingual safety evaluation of 10 industry-leading LLMs across 79 languages, identifying a systematic breakdown of safety alignment in low-resource environments. Experience designing evaluations with LLM-as-a-Judge Conducted empirical benchmarking of LLM reasoning capabilities, comparing Zero-Shot vs. Chain-of-Thought (CoT) prompting across causal inference tasks Presented our work on causal reasoning at Optimized AI 2025 and AMTA 2025 Led a cross-functional team to create a dataset of UN General Assembly speeches
EDUCATION
Hiram College
Bachelor's degree, Spanish, Business (minor)
University of Colorado Boulder
Doctor of Philosophy - PhD, Linguistics
University of Colorado Boulder
Master of Arts - MA, Spanish Linguistics
University of Colorado Boulder
Master's degree, Hispanic Literature
SKILLS
ABOUT DAVID HARPER
Experienced Researcher with a Passion for Data-Driven InnovationWith a PhD in Linguistics and over a decade of experience in Product and EdTech research, I am driven by the power of data to transform product experiences. Most recently, I have returned to my Linguistics roots and am ensuring that AI systems perform well-and safely-across multiple languages through robust LLM evaluations. My team has most recently focused on multilingual causal reasoning and AI safety, creating taxonomies and conducting rigorous evaluations on many leading LLMs.I enjoy working on cutting edge research and extracting actionable insights from messy data, enabling businesses to make informed decisions that drive growth and customer satisfaction. And I enjoy sharing this work-as I did at the OptimizedAI 2025 and AMTA 2025 conferences. In all my positions, I have actively contributed to a collaborative and growth-oriented work environment. Some of my most enjoyable work experiences have involved managing interns.If you are aware of any exciting openings, I would be thrilled to connect and discuss how my skills and experience can contribute to your team\'s success.I also have extensive experience working with education data and leading research studies on the impact of educational interventions. As of 2024, I am certified in the What Works Clearinghouse (WWC) Group Design Standards Version 5.0.Desired positions: Senior Researcher, Data Scientist, Quantitative UX Researcher, Research Manager, Mixed-methods ResearcherKey Skills:Research Design | Statistics | SQL R | Python | Data Analysis LLM EvaluationsLinguistics | NLP Multilevel Modeling | Logistic & Linear Regression | Decision Trees | Supervised & Unsupervised Machine LearningSurvey Design & Analysis | QualtricsData Visualization & Storytelling | Experiment Design & A/B TestingDashboard Development | R (shiny)| Databricks | Tableau | Looker Professional Presentations| Team Leadership | MentoringProject Management | Strategic ThinkingAgile | Asana | ConfluenceFluent in English, Spanish, & German
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