#import "layout.typ": cv, event, article, divider

#show: doc => cv(
  name: "Charlotte Som",
  tagline: [Systems programmer, videogame cheat developer, #linebreak() reverse engineer, multispecialist.],
  links: (
    (icon: "email", link: "mailto:charlotte@som.codes", text: "charlotte@som.codes"),
    (icon: "github", link: "https://github.com/char", text: "@char"),
    (icon: "link", link: "https://char.lt", text: "char.lt"),
    (icon: "link", link: "https://hackery.site", text: "hackery.site"),
  ),
  doc,
)

#grid(columns: (1fr, 2fr), column-gutter: 1cm, [
== Writing

#article(title: "Circumventing the JVM Classfile Verifier", date: 2019, url: "som.codes/jvm-force-no-verify")
#divider()
#article(title: "Game Science: GTA V's Stunt Jumps", date: 2021, url: "som.codes/gta-v-stunt-jumps")
#divider()
#article(title: "Circumventing Cisco Duo's Authenticator App", date: 2021, url: "som.codes/cisco-duo-bypass")
#divider()
#article(title: "Extracting API Keys from a Minecraft Launcher", date: 2022, url: "som.codes/mmc-msaclientid")
  
== Competitions

#event[Google Hash Code 2020][Google][February 2020][]

Worldwide intractable problem optimization competition. Competed as part of a globally-distributed team of three.

- *UK*: 6#super[th] place out of 406 teams.
- *USA*: 13#super[th] place out of 619 teams.
- *Canada*: 3#super[rd] place out of 135 teams.
- *Worldwide*: 252#super[nd] place out of 10724 teams.

#divider()

#event[Deloitte UK CTF][Deloitte][December 2020][London]

UK-wide infosec competition, organised by Deloitte.
Participated as a university team of six.

- *Qualifiers*: 10#super[th] place.
- *London finals*: 7#super[th] place.

#divider()

#event[BLÅHAJ CTF Team][][2021 -- 2022][]

- *Hack-A-Sat 2 CTF*: Organised by the _US Air Force & US Space Force_. Placed 15#super[th] out of 697 teams.
- *corCTF 2021*: Placed 11#super[th] out of 904 teams.

== Languages

- *English* (native, primary)
- *French* (maternal)
- *Spanish* (since 2013)
- *Korean* (since 2016)
], [
== Experience

#event[Multiplayer game technology][WorldQL Corporation][April 2022 -- Present][]

I currently work at WorldQL, where the mission is to reduce the barrier between singleplayer and multiplayer game development.

Here, I've worked on EVM-based transaction processing / smart contracts (writing a hot wallet transaction scheduler in Rust),
written a multiplayer web game engine in TypeScript (with several interesting netcode paradigms) & backend web services in Rust
(at one point embedding `deno_core` in a Rust application for sandboxed multitenant user code exec on the server-side)
as well as a (Git-based) beginner-oriented version control system.

To facilitate prototype art we also experimented with Blender automation and machine learning in production,
writing & deploying Python + CUDA / ONNX services.

#divider()

#event[Game modding / game-hacking][Self-employed][2016 -- 2025][]

Game development & game modding is a very effective entrypoint into programming at large.
I started in 2007(!!) developing ROBLOX games.

- _GTA Online_: C++ (primarily), Rust
- _Minecraft_: Java, Kotlin (primarily), Scala, JVM Bytecode
- _Counter-Strike: Global Offensive_: C++ (primarily), Rust
- Unity3D (various): C\# (primarily), .NET MSIL, and C++ (for `il2cpp` games)

In my teens, I used to sell a custom client for Minecraft
(5-figure USD revenue from 2016 -- 2019),
and a subscription trainer menu for GTA Online.
I find the resulting end-to-end product experience & reverse engineering skills valuable to this day.

#divider()

#event(company_newline: true)[Commercial obfuscator for JVM programs][paramorphism.dev (Self-employed)][2017 -- 2022][]

This solo project involved writing the product itself, internal tooling around JVM bytecode to aid debugging,
and the sales site in SvelteKit (then-_Sapper_, actually).

- _Paramorphism_: Bytecode obfuscator for JVM programs written in Kotlin.
- _libparamorphism_: Optional native runtime opaque library for programs
    obfuscated by Paramorphism written in Rust first and then Zig later.
- _Koffee_: Domain-specific language for Kotlin for Java classfile generation.
- _Aksara_ (internal): Bytecode assembly language and assembly/disassembly toolchain written in Kotlin.
- _Katon_ (internal): Bytecode viewer and editor with a GUI written in Rust and interfacing via Java Native Interface to Kotlin (_Aksara_) and Java (_Fernflower_).
- _Citadel_: An experimental custom-instruction-set VM with a _libparamorphism_-backed native executor (+ some compilers), focusing on self-modifying code.

#divider()

#event["Splashforce"][Force Software LLC][November 2020 -- October 2021][]

The flagship "Splashforce" product was an end-user e-commerce automation suite
for various sneaker sites. My duties included:

- `cronet`: Custom patches for & isolation of Chromium's HTTP stack.
  (for use as a library to evade TLS fingerprinting in the application.)
- Pairing an Electron (node.js / web JavaScript) frontend to a Go backend.
- Anti-piracy, reverse-engineer-deterrent releases for the Go backend.
  (Code virtualization, `cgo` FFI bindings, etc.).
- Reverse engineering JS & WASM bot protection measures on websites.
- Reverse engineering & circumventing bot prevention measures on Android apps. (Java, Smali, etc).
])

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