// identity
Ethan Cornwill

ETHAN

AI Engineer

I build AI systems that ship to production.

Melbourne, AU 🇦🇺

// terminal
guest@finneh.xyz:~$ whoami
>
// stats
0
yrs dev
0
yrs ops
// connect
// about

I build AI systems that ship to production. Real traffic, real failures, real users.

I wrote SPARC — 3,000 lines of prompts that replace a development workflow. Feed it a spec; 12 agents handle security, TDD, and version control. Scaffolding drops from 2 days to 4 hours.

13 years of software plus a decade in operations where downtime costs money. You learn fast what actually breaks at 2AM.

RAG Systems Prompt Eng Full Stack Operations
// all projects 14 total
Zetto
Featured

Zetto

Voice-first Japanese learning app with sub-second AI conversation via Gemini 2.5 Flash. Built on a Flash Lite + TTS architecture that cuts API costs ~75% vs Gemini Live.

AILanguage LearningJapanese
FinnehSpoof
Featured

FinnehSpoof

AI-powered Minecraft player simulation solving the cold-start problem for new servers.

JavaAIMinecraft
PoliCRM
Featured

PoliCRM

Automated political compliance infrastructure built in 48 hours to verify 911 members against electoral rolls.

PythonAutomation
SPARC Framework
Featured

SPARC Framework

Prompt library of 3,000+ lines orchestrating 12 specialized agents across a full dev cycle. Cuts scaffolding from 2 days to 4 hours.

AIFramework
Nexus

Nexus

Shared expense tracker and savings planner for couples — split costs, set joint goals, and sync budgets without linking bank accounts.

FinTechWeb App
PokerBo

PokerBo

Poker meets Sicbo in the browser — vanilla JavaScript card game with custom betting logic, state management, and a live playable demo.

JavaScript

// Overview

// Stack
// technology
Axion

Axion

// 2025

Founder & Lead Engineer
Active Oct 2025 – Present

Ships AI-native products using SPARC methodology. Built Nexus (fintech platform), SPARC prompt library, and this portfolio. Every product is a production testbed for AI-assisted development at scale.

DataAnnotation

DataAnnotation

// 2024 - 2025

AI Code Analyst / Software Developer – AI Trainer
Active May 2024 - Present
Evaluated and refactored AI-generated code in multiple languages (including Python and JavaScript) to improve logic, enforce best practices, and ensure correctness.
Assessed and rated the quality of Large Language Model (LLM) responses against complex rubrics, comparing multiple outputs for accuracy, helpfulness, and safety.
Developed targeted coding challenges and unit tests designed to evaluate the reasoning and real-world problem-solving capabilities of AI models.
Analyzed and debugged complex functions to identify logic errors and tested the model's ability to correctly utilize real-world tools like APIs and command-line interfaces.
MagnetLab

MagnetLab

// 2025

Lead Software Engineer | AI Systems
March 2025 - September 2025
Architected and built the Magnet AI Agents platform, deploying bespoke voice and chat agents that automate client intake, qualify leads, and resolve support tickets, directly reducing non-billable hours for service-based businesses.
Led the development of the Magnet CRM, white-label, all-in-one sales OS designed to be fully branded and launched for clients in under 7 days.
Engineered and implemented the proprietary SPARC methodology, an AI-assisted development workflow that reduces build times for complex web applications by up to 75% compared to traditional agency models.
Directed the technical vision for all client projects and internal ventures, ensuring every system built is scalable, secure, and focused on delivering measurable business outcomes.
// operations
ALDI Stores Australia

ALDI Stores Australia

// 2025

Duty Store Manager
Active October 2025 - Present

Managing daily operations for one of Australia's leading discount grocery retailers, focusing on operational efficiency, team leadership, and customer service excellence in a fast-paced retail environment.

McDonald's

McDonald's

DirectWest Pty Ltd

// 2015 - 2025

Operations Technology Platform (OTP) Manager
March 2024 - October 2025
Maintained 99% technology uptime across POS and network systems through monthly audits and proactive fault resolution.
Assistant Business Manager
August 2015 - February 2024
Progressed from Crew Member to ABM over 9 years; managed QSC&V standards, team performance, and sales strategy.
Taco Bell Australia

Taco Bell Australia

// 2020 - 2022

Assistant Restaurant Manager
June 2020 - June 2022
Managed daily operations for the busiest Taco Bell restaurant in the country, consistently achieving top-tier results across all major KPIs, including customer satisfaction, speed of service, and labor management.
Directed the successful launch of two new restaurant locations, establishing foundational operating procedures and recruiting and training new-hire teams of up to 70 staff members from the ground up.
Recognized with over 12 performance awards for operational excellence; implemented inventory control measures that reduced food waste by 15%.
// tools & skills 10 tools
OpenAI API
AI/LLM Tools
HTML
Core Stack
React
Core Stack
Git
Infrastructure
LangChain
AI/LLM Tools
JavaScript
Core Stack
Node.js
Core Stack
Docker
Infrastructure
PostgreSQL
Infrastructure
Python
Core Stack
AI Engineering

Architecting systematic prompt libraries (SPARC), building RAG pipelines, and fine-tuning LLM behavior for production environments.

Prompt Architecture

Designing complex agentic workflows, implementing TDD for AI generation, and optimizing context windows for accuracy.

Full Stack Dev

Proficient in HTML, CSS, JavaScript, and modern frameworks. I build responsive, accessible, and visually striking applications.

Backend Systems

Solid understanding of Node.js, Python, and databases. I handle server-side logic, API design, and data flow management.

Operational Resilience

10+ years in high-stakes operations taught me to build systems that don't just work when things go right, but recover when they go wrong.

Technical Leadership

Bridging the gap between technical complexity and business goals. I lead teams with clarity, empathy, and a focus on shipping.

// education

Coder Academy

Diploma of Information Technology - Web Dev

// 2024

GPA: 6.75/7.0 — 6x High Distinction

Full-time study program focused on modern web development technologies and practices.

freeCodeCamp

Responsive Web Design

// 2024

Certification covering HTML, CSS, flexbox, CSS grid, and accessibility best practices for building responsive, mobile-first web applications.

Distance Education Centre Victoria

VCE Year 12

// 2017

// status
Available

Open to AI engineering, full-stack, and technical lead roles.

🇦🇺 Melbourne, Australia

🇯🇵 東京 — Open to relocation to Tokyo

日本語学習中 — JLPT N5 (目標: N3)

> mail@finneh.xyz > share_portfolio()
// findy ポートフォリオ / findy portfolio

Findy スキルシェア
日本ではたらきたいです。わたしのスキルとコードを見てください。

Public skill & code evaluations for recruiters in Japan — verified by Findy.

findy-code.io/skills-share/5saH9fgUEzb5o
VIEW_FINDY()
// contact
guest@finneh.xyz:~$ cat contact.txt

Got a project idea, job opportunity, or just want to chat about AI systems? I'm always interested in interesting problems.

> mail@finneh.xyz
SEND_MSG() LINKEDIN GITHUB

// Response time: usually within 24 hours. Carrier pigeons not currently supported.