Engineer, founder & technology leader

Jonah
Turnquist.

I build and integrate AI systems for problems where the details matter.

I’m a software engineer, founder and technology leader based in Sydney. I co-founded PropCode, turning complex planning regulations into clear, explainable answers.

Previously, I established Service NSW’s first AI engineering team and built software at Atlassian and Amazon.

From complex problems
to working systems.

PropCode

Co-founder & CTO

2022 — Present

Accurate, explainable AI at scale.

I co-founded PropCode and built its regulatory-analysis platform from the first commit to paying customers. I designed AI systems to process large volumes of legislation and assess which rules apply to each property, with a focus on accuracy, source citations and explainable reasoning.

Legal & regulatory AI · Accuracy · Explainability

Service NSW

Principal Software Engineer — AI

2020 — 2021

Building an AI capability from the ground up.

I established the agency’s first AI engineering team and led delivery of its first production chatbot. I shaped the technical strategy, hired the team and worked with contact-centre staff to integrate it into existing systems and support workflows.

AI strategy · Team building · Public services

Atlassian

Staff Software Engineer

2015 — 2019

Building and delivering enterprise software.

I led delivery of a customer migration platform, built internal engineering tools and helped shape product direction. Working across engineering, product, design and support at the company behind Jira gave me a strong grounding in enterprise software development and agile delivery.

Enterprise software · Agile delivery · Engineering leadership

Amazon

Software Development Engineer

2012 — 2014

Engineering for scale.

I built backend systems for Amazon Fresh and Amazon Music, working on services designed for massive scale. At Fresh, I developed cart, checkout and regional product-availability services, and coordinated expansion into new US regions across engineering and operations. At Music, I contributed to Cloud Player and the AutoRip launch, delivering digital music from customers’ past CD and vinyl purchases.

Scalable systems · Backend engineering · Delivery across teams

CTO at togetherAI and Parampara.

How I work.

I like working across the whole problem: understanding what people need, figuring out the technical approach, and integrating a solution into the way they work. I’m particularly interested in legal and regulatory AI: systems that analyse complex source material accurately, explain their conclusions and make their limits clear.

I studied Electrical Engineering & Computer Sciences at UC Berkeley, and have worked across startups, enterprise and government in the US and Australia. Sydney is home these days.

Say hello.

You can find me on LinkedIn.