TECHNICAL CASE STUDIES
Technical writeups of Sara's side projects: architecture, implementation details, what broke, and what she would do differently. Her professional work at IBM and Moody's Analytics is listed too, with the public references that can be shared.
Case studies
Keysensus
Context-aware data-governance service at IBM (HashiCorp). Applies policy decisions using business and service context, instead of static field-only matching, across distributed production pipelines, with ML classification of sensitive data on AWS Bedrock and an auditable draft → review → publish → revoke lifecycle. The control layer that determines what data is safe for downstream AI and analytics systems to use.
Proprietary work: no public repository or write-up.
ETL Pipeline Optimization
Modernized high-throughput data pipeline at Moody's Analytics using PySpark and Databricks, reducing processing time by 54% while handling larger datasets. This is the data-velocity foundation that downstream analytics and AI workloads depend on.
Proprietary work: no public repository or write-up.
Sanctions Compliance System
Built a sanctions screening product at Moody's Analytics that generated $1.2M in first-year revenue. Automated compliance checks across financial transaction datasets with SQL, PostgreSQL, and the data architecture behind them, at a 99.7% EU privacy compliance rate.
Proprietary work: no public repository or write-up. Public references are linked.
LangChain Citation System
Developed LangChain-powered RAG citation system at Moody's Analytics using GPT-4 Turbo, achieving 92% citation accuracy. Solved the hallucination problem with page-level source verification: LLM evaluation and grounding work, before it had a job title.
Proprietary work: no public repository or write-up. Public references are linked.
Internet Historian
A Wayback Machine archiver that keeps retrying while the Internet Archive is busy, until your pages are actually preserved.
Anime Analyst
Natural-language query system over 60,000+ anime titles: PostgreSQL, a local ReAct SQL agent, and a Streamlit frontend. CMU capstone, presented at Anime Boston 2026.

Twitter Archive Pipeline
ETL pipeline that turns Twitter/X export files into a searchable dataset with NLP sentiment and topic classification, built for longitudinal self-analysis.
Digital Wellness Through Data
Interactive case study mining a decade of personal social media data (26,720 Twitter likes, 4,500 saved YouTube videos, 500+ LinkedIn connections) to reveal what the algorithm sees. CMU data mining final project, published as a scrollytelling site.

Hamster Wheels
17-agent AI system for personal life management, built in Craft on Claude MCP. Each agent owns one life domain: triage, career, finance, events.
Desktop Pet Rescue
A porting practice: adopting cute Windows-only desktop apps and giving them a second life on native macOS. Two Chiikawa pets so far, with prominent credit to the original developers and fixes offered back upstream, including an open PR for Mac support.
Gremlin Goods
Maker studio producing laser-cut items, sublimation prints, acrylic charms, and button sets, with automated design-to-production workflows. Commissions open for conventions, events, nonprofits, and artist collabs. Charity donations (GDQ, Frost Fatales) stay at the core.
Data Gremlin Go Brr
Substack newsletter on AI tools and data systems for practitioners: the intersection of technical work with everyday life.
Uma Musume Q&A Bot
Citation-first RAG Discord bot for Uma Musume game mechanics, answering with page-level source attribution from a 200+ page community reference doc.