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Levi Neuwirth 2026-04-26 16:47:12 -04:00
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- **Brown University** — Sc.B. in Computer Science and Mathematics. August 2022 May 2026
- **DIS Copenhagen / Københavns Universitet** — Semester abroad. Fall 2024
## Research Interests
My work clusters into three threads:
- **Machine learning** — order-invariant ICD-10-CM embeddings (under review at *JAMA Network Open*, deployed calculator), the NeuroPose 3D-kinematics system in Liqi Shu's lab at Brown Neurology, and ongoing research engineering at [NeuroAI](https://neuroai.health). Undergraduate work has been clinically focused; graduate study broadens the scope.
- **Computer systems and high-performance computing** — the Weenix kernel, a TCP/IP networking stack from scratch in Go, and micro-architectural performance work (SIMD, hardware counters via PAPI, RAPL energy, cross-ISA ports across AVX2 / ARM NEON-SVE / RISC-V V) on Brown's OSCAR HPC cluster.
- **Reinforcement learning and applied AI** — a Magic: The Gathering RL project on OSCAR; production agentic-systems work at xAI on `grok-code-fast-1`; reasoning, evaluation, and red-teaming contracts with Anthropic, Mistral, and OpenAI.
Computer vision and security thread through all three but do not stand on their own.
## Research
### Published / In Submission
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- **Shu Laboratory, Brown Department of Neurology***Undergraduate Researcher and Technical Lead.* October 2023 Present. Technical lead on [NeuroPose](/essays/neuropose/); co-lead developer on the [ICD-10-CM embedding model](/essays/beyond-comorbidity-indices/).
- **Independent Research Contracting***Anthropic, Mistral, OpenAI.* 2025 Present Expert reasoning contributions in code and mathematics for agentic workflows, agentic task design and evaluation, AI safety, and red-teaming.
## Projects
## Selected Projects
For a complete index of engineering artifacts — kernels, networking, cryptography, deployed ML — see [/cv/projects/](/cv/projects/).
- **[Weenix](/essays/weenix/)** — Unix-like kernel in ~7,000 lines of C: virtual memory, VFS, system calls, threading, device drivers, interrupt handlers, and file systems. Custom linker support for running userspace x86-64 ELF binaries; extended with pipes and userspace preemption.
- **[Networking Stack from Scratch](/essays/networking-stack/)** — TCP/IP, RIP, UDP, and DNS in Go, supporting file transmission of up to 1 GB across 8-node networks. Extended with a fully RFC-compliant SSH implementation (2,000+ additional lines) supporting sustained sessions of arbitrary length.
- **[SIMD / PQC Performance Study](/essays/where-does-simd-help-post-quantum-cryptography/)** — Hand-written AVX2 assembly for ML-KEM / Kyber. 35×56× speedup over compiler-optimized C for core NTT arithmetic; 5.4×7.1× end-to-end KEM speedup, with a full statistical-analysis pipeline on Brown's OSCAR cluster.
For the complete index — additional artifacts, deployed ML, and smaller tools — see [/cv/projects/](/cv/projects/).
## Contact

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---
title: Now
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An index of my current projects and focuses across domains - research / professional, creative, miscellaneous, you name it.
## Working on
### Levshell
I am working on a comprehensive rewrite of Levshell, my productivity and research-focused shell for Linux (running Wayland). This is a major focus of mine over the summer of 2026 as I prepare to begin my graduate program in Computer Science.
### "Pmacs"
I'm writing an IDE that is heavily inspired by Emacs, but written in a more modern programming language (Zig) with more powerful features, and, yes, parallelism!
A working index of what I am building, writing, and thinking through right now — kept current rather than comprehensive. The page is rebuilt whenever an entry moves; the stamp above the first section is the canonical mark of how fresh the picture is.

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You have found the working library of a mind that takes that spirit seriously. Here live research papers and living essays, compositions and scores, poetry and prose, and the countless smaller investigations that refuse to fit neatly into any one category. The documents here are far from immutable; they grow, are revised, accumulate footnotes and second thoughts. I welcome you to all of it.
This website is *not* an academic homepage, nor a blog, nor a portfolio — though it borrows from each. It is something I built because no existing format could hold what I wanted to make. I carry a copy of *The Brothers Karamazov* everywhere; I compose symphonies and concerti for orchestras; I study computation and mathematics; I am about to begin my graduate work in computer science. These facts coexist in one life, and this is the place where they coexist on one shelf.
This website is *not* an academic homepage, nor a blog, nor a portfolio — though it borrows from each. It is something I built because no existing format could hold what I wanted to make. I carry a copy of *The Brothers Karamazov* everywhere; I compose symphonies and concerti for orchestras; I study computation and mathematics; in autumn I begin graduate study in computer science at the Technical University of Denmark, where my research spans machine learning and computer systems. These facts coexist in one life, and this is the place where they coexist on one shelf.
::: {.hp-latin lang="la"}
*Te accipio, hospes benignus.*