Portfolio

Justin Yang //
Software Engineer

Systems programmer with a focus on computer security, network tooling, and financial APIs. Volunteer EMT.

Selected Projects
Security Research

XOR_Crypter

open source
Binary obfuscation tool

An XOR-based encryption tool for studying binary obfuscation techniques. Demonstrates PE file manipulation, encryption routines, and stub-based decryption at runtime. Built to explore how encryption layers interact with executable formats.

C++ Windows API PE Format Cryptography
Surveillance

VDash

closed source
IS&R Platform

A surveillance and intelligence platform for tracking vehicle locations and driving patterns.

Rust React Typescript
Financial API

alpaca-cpp

open source
Trading API client library

A C++ client library for the Alpaca trade API, supporting both REST and WebSocket streaming interfaces. Designed for rapid trading algorithm development with clean abstractions over market data, order management, and account operations.

C++ REST API WebSocket Finance
Web Security

WebCrypt

open source
Web-based encryption tool

A web-based crypter combining a C++ backend with a browser-accessible frontend. Explores the intersection of web delivery mechanisms and binary encryption, built with XAMPP for local hosting and testing.

C++ Web XAMPP Encryption
Network Tooling

MacSpoof

open source
MAC address utility

A shell-based network utility that automates MAC address spoofing using nmap for network scanning, dhclient for DHCP lease management, and wpa_supplicant for wireless authentication. Useful for network testing and privacy research.

Shell nmap dhclient wpa_supplicant
Cryptography

PenguinCrypt

open source
Encryption tool

A C++ encryption tool exploring custom cryptographic routines and binary packing techniques. Part of ongoing research into executable protection and code obfuscation methods.

C++ Encryption Binary Analysis