AI Engineer  ·  Security Researcher

Steven Koch

I build AI systems and stress-test them. Security research on large language models, applied AI for a funded startup, and the games and tools in between.

EXIST-funded Co-Founder  /  LLM Red-Teaming  /  Game Design B.A.
Scroll
01 / WHAT I DO

Four crafts, one engineer.

Most people pick a lane. I work where security, AI and real-time systems overlap, and I go deep in all four.

01

Security

LLM red-teaming and prompt-injection defense. Seraph Guard, hardened against the OWASP LLM Top 10 and tested against a live attacker.

02

Applied AI

Generative pipelines and local inference for voice, image and audio. Real tools that run, not slideware.

03

Game Design

Real-time worlds in Unreal and Unity. Co-founder of Infinite Horizon, EXIST-funded AR learning.

04

Craft

3D, materials and procedural tools in Blender and Python. I make the assets I use.

02 / SELECTED WORK

Things I built.

AI Security · Research

Seraph Guard

A local guard layer that sits in front of an LLM and is hardened against the full prompt-injection kill-chain. Every defense is measured against a live red-team and published as a reproducible benchmark and a bilingual whitepaper.

LLM Red-TeamingOWASP LLM Top 10QLoRA 4-bitLocal
Visit the research site ↗
Startup · Unity 6

Infinite Horizon

EXIST-funded AR climate learning for kids 8 to 12. Co-founded with a team of four; I own the AI systems and core development.

ARUnity 6Co-Founder
infinite-horizon.eu ↗
Tool · Local AI

AudioGen Studio

A local multi-track audio studio. Voice, music and SFX generated and composed on one timeline, fully offline.

PySide6TTSLocal Inference
Read the deep dive ↗
Tool · Procedural

PlanetGenerator

A node-based procedural planet texture generator with a real-time OpenGL preview. Exports PBR basecolor, height, normal and roughness maps for game and visualization pipelines.

PythonOpenGLNumba JIT
Read the deep dive ↗
03 / BEYOND THE CODE

Game design is how I think.

A bit of the 3D, asset and material work I make in Blender and Substance. The artist side is part of how I build everything else.

3D Assets
PBR Materials
Full portfolio on ArtStation ↗
04 / CONTACT
Steven Koch
Let's talk.

Open for work in AI engineering and LLM security, research collaborations, and conversations about building AI products that hold up under attack.