2026
An LLM triage pipeline where the model doesn’t get the final say
One LLM call doing pre-op triage scored 70.7%. So I split the job: the model only extracts quoted facts, and Python applies every rule. That took the eval score to 99.5%. Each quote gets checked against its source document, and anything unverifiable goes to a human, with 0 false clearances on 50 sample and 15 held-out cases.
Python · OpenAI API · pytest
A key-value store that survives its primary dying
Primary/backup replication in Go. A view service promotes the backup when the primary goes quiet and never lets two primaries exist, even across a network partition. The catch: no mutexes allowed, only goroutines and unbuffered channels.
Predicting mortality from ER vitals
Time-series vitals and labs for 16,000+ patients, an RBF-kernel SVM weighted for the class imbalance, and a lot of cross-validation on C and γ. It landed at 0.86 AUROC (bootstrapped CI 0.81–0.91).
A search engine, starting from MapReduce
First the MapReduce framework: a manager, workers, and UDP heartbeats to notice when one dies. Then I used it to index 100,000+ web pages, ranked with tf-idf mixed with PageRank.