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derekShaheen/README.md

Systems-focused senior software engineer

I design and build deterministic systems that operate under real-world constraints — from high-volume data pipelines to game AI, simulations, and tooling.

🧠 What I Work On

I specialize in turning complex, constraint-heavy problems into maintainable, observable systems.

  • Backend-heavy application logic and data pipelines
  • Performance-critical SQL and data modeling
  • Simulation, automation, and AI decision systems
  • Developer tooling and visualization for debugging complex behavior

My professional work involves real world large-scale operational systems.
Public repositories focus on tooling, simulations, and exploratory systems.

🧩 Public Work Themes

Systems & Data Engineering

  • High-throughput SQL Server development
  • Data validation, sequencing, and state management
  • Set-based refactors of legacy procedural logic
  • Observability-driven design (debug flags, traceability, visual validation)

Simulation, AI & Automation

  • Unity-based AI behavior systems (navigation, avoidance, prioritization)
  • Swarm and group behavior modeling
  • Runtime patching and instrumentation (Harmony / BepInEx)
  • Deterministic decision logic over heuristic black boxes

Visualization & Exploration

  • Browser-based simulations (Canvas / WebGL)
  • Shader-driven visual debugging
  • Interactive tools to reason about invisible systems

⚙️ Engineering Principles

  • Deterministic systems are easier to debug than clever ones
  • Make behavior visible before optimizing it
  • Replace procedural sprawl with data-driven pipelines
  • Prefer correctness and observability over premature abstraction
  • Refactor toward simplicity, not minimal lines of code

🛠️ Tools & Technologies

Languages & Runtimes

C# · SQL · Python · Lua · Bash

Data & Backend

SQL Server · PostgreSQL · MySQL · Oracle · SQLite
High-volume stored procedures · query optimization · schema design

Game & Simulation

Unity · ECS concepts · Harmony · BepInEx
AI navigation · behavior systems · procedural logic

Visualization & Web

HTML · CSS · Canvas · WebGL · Shaders

Infrastructure & Tooling

Linux · Azure · Git · GitLab · CI/CD
Developer tooling · automation · scripting

📂 What You’ll Find Here

  • Simulation and visualization experiments
  • Game automation and AI behavior tooling
  • Performance-oriented refactors and utilities
  • Exploratory projects for testing system ideas

Pinned Loading

  1. WickerREST WickerREST Public

    REST Server for Mono and IL2CPP Unity Games for use with Melon Loader

    C# 3

  2. SkToolbox SkToolbox Public

    This toolbox is used for designing overlay menus in Unity Games. Typically used for creating a custom menu for use with existing projects. Includes loader module.

    C# 14 5

  3. evosim.github.io evosim.github.io Public

    Basic evolution simulator with predator / prey utilizing neural network brains.

    HTML

  4. GameHelper2 GameHelper2 Public

    Overlay for Path of Exile 2

    C# 12 3