EST. — Data Scientist in London
Chaeyoon
Kim.
Data Scientist at NHS England · Certified AI Ethicist · London
01 — About
Working at the edge of data and health.
I'm a Data Scientist at NHS England working on healthcare workforce modelling and LLM applications. Certified AI Ethicist with a background in data engineering at Samsung Semiconductor and an MSc in Data Science from City St George's, University of London.
LangChain Ambassador (2025) · open to new connections and collaborations.
View full CV ↗02 — Projects
Selected work.
1st Place
Semantic Answer Type Prediction
MSc dissertation submitted to the SMART 2021 shared task at the International Semantic Web Conference. Ranked 1st for classifying the expected answer type — entity, literal, or boolean — from natural-language questions over a knowledge graph.
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NHS Policy Navigator
Adaptive retrieval agent over the NHS 10-Year Health Plan, built in London. Uses agentic RAG to answer nuanced policy questions with source attribution.
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Reducing Missed NHS Appointments
ML solution to cut the cost and waitlist impact of non-attended hospital appointments, developed for a hackathon challenge set by the No. 10 data science team.
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Heartlink — Heart Disease Prediction
Spec-driven heart disease prediction pipeline with an NHS-styled dashboard. Classification, regression, and clustering on UCI Heart Disease data with clinical guardrails and property-based testing.
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In Progress
PWR Workforce Elasticity Modelling
Panel econometrics estimating how NHS provider non-substantive staff spend responds to agency-restriction policy. 68 NHS trusts, 4 financial years, 68 passing tests. Headline elasticity β = −0.287 [95% CI −0.434, −0.140], cluster-robust SE on ICS.
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Getting Started with Makaton — AAC Choice Board
Digital symbol-based choice board for non-verbal and emerging-verbal pupils in UK SEN schools. React 18 + Supabase, optimised for iPad. Predictive card suggestions via Markov chain and Thompson-sampling bandit — no runtime LLM dependency. GDPR-compliant with multi-source AAC symbol fallback chain.
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03 — Writing
Thoughts on
data science.
Reflections & project notes
On LinkedIn