i build useful ai without giving up privacy.
i'm yumi, a forward-deployed engineer with a cybersecurity background.
ai in production. at rutilea , i lead ai-driven system migrations for japanese government agencies and manage self-hosted llm infrastructure.
privacy and safety. i've researched llm safeguards and spoken at tedx about why privacy matters .
## about
i graduated early from penn state with a b.s. in cybersecurity, co-founded
a startup, and now embed with enterprise clients to ship ai systems. i've
researched llm safety, sold gpu contracts at nvidia gtc, and lead
system migrations for japanese government agencies.
## experience rutilea, inc. software engineer (forward deployed) jan 2025 – present 3 engineers analyzed half of a 6-codebase migration portfolio in 3 months rochester institute of technology cybervsr research assistant may 2024 – aug 2024 jailbroke gpt-4o, gpt-3.5 turbo, llama 2, and llama 3 while researching safeguards swappify co-founder & cto mar 2023 – mar 2024 led 11 engineers building a second-hand clothing marketplace rutilea, inc. — software engineer (forward deployed) kyoto, japan · jan 2025 – present lead engineer on system migration for the japanese national police agency — analyzing 6 codebases (one 4m lines, originally 700 engineers) pioneered ai-agent-driven migration using claude code and codex — 3 engineers analyzed half the portfolio in 3 months manage 128-gpu h100/h200 cluster running self-hosted llms via vllm and litellm sold 80+ gpu node contracts at nvidia gtc 2025 built a real-time political sentiment platform — knowledge graph over live x data with postgres, next.js, and three.js as intern (may–aug 2024): built a production automated call center backend in rust powered by gpt-4o, claude 3.5, llama 3, and gemma 2 rochester institute of technology — cybervsr research assistant remote · may 2024 – aug 2024 conducted 3-month research on llm safeguarding and jailbreaking under dr. j. yang successfully jailbroken gpt-4o, gpt-3.5 turbo, llama 2, and llama 3 using prompting techniques (dan variants, godmode) studied llm space representations of queries and protection methods against harmful prompts swappify — co-founder & cto university park, pa · mar 2023 – mar 2024 led 11 engineers building a full-stack mobile app for second-hand clothing trades built with ionic/react/typescript, supabase/postgresql, and deno managed the full development lifecycle with weekly syncs between engineering and business teams ## writing i write about programming, focus, and digital life.
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## stack daily tools i rely on: