justincrosbie@gmail.com
Based in Brisbane, Australia
© 2024 Justin Crosbie. All Rights Reserved
Hire Me!Introduce
Hi I'm Justin Crosbie,
I Innovate, Develop and Deliver Software
I am a seasoned software developer, tech lead, agile product owner, with 30 years experience delivering software direct to customers.
I have worked for many startups, guiding the innovation process to deliver products that successfully bring value to their markets
30+
Years of
Experience
10+
startups
I have been part of
100+
projects completed
About
Every startup's survival depends
on knowing its market, it's all about the Pain Points!
I've been working for startups since 2001, and I've witnessed them rise, and fall.
It's not always the competition. It's not always the product. It's not always the team.
It's never for lack of ideas - we're clever people.
It's always the same thing:
We don't know our market.
Resume
Education & Experience
Creator of 
Passkeyme.com!
Passkeyme is a SaaS platform that enables developers to easily add passkey login to their web and mobile apps
Built with love in rust and React, with native SDKs in Swift, Kotlin, Javascript, Ionic Capacitor, Flutter and and React Native
Uses Stripe for payments, with rate limited subscriptions and usage reports
Its currently accepting Beta testers, feel free to give it a try!
Freelance Consultant
Currently, I'm doing some project-based work for a couple of clients
Projects involve Rust and Flutter, and Java and Angular
R2 Labs Pty Ltd
An Anonymous Age Verification service, for age-restricted sites and social media, to protect children online
Built in rust, Next.JS and AWS Amplify, AWS Lambda
Using Chat GPT APIs, Liveness detection via AWS Rekognition, and OpenCV/tensorflow/python
As covered in an article in The Australian!
An upgrade to OAuth that allows another user to act as a delegate for a user - for Power-of-Attorney use-cases
Built around Keycloak, implementing a custom IdP, built in Java Spring Boot, with Angular frontend
An escrow service for buying and selling using crypto. Currently supports BTC and ETH
This was an existing project that I took over and completed
Built in rust with Next.JS and rust WASM frontend
HSG2 Pty Ltd
Providing ad-hoc support for their clients
Involves updating Java and Angular code, with an OAuth produect based around Keycloak, working with client Postgres data
Side-projects
In my free time I'm currently building a stable-diffusion music video generator, with storyboarding
Recently built a social media sentiment analysis service, to detect bots, trolls, and other noise users and bad actors. Plans to extend to a Chrome plugin
Upcoming music app - Choons - which will use AI to categorise and rank uploaded music tracks. Built with rust backend and Flutter frontend with Figma designs. Almost working!
I am also working on taking out a patent on the idea behind Choons
Built a DApp around a Solidity contract, using Metamask, web3.js, Infura, Truffle
Otherwise, available for hire!
Tech Lead
ubank
Integrated Ping MFA and Passkeys authentication into the main banking app via Native Mobile SDKs I built
An intricate yet fun project, I am now expert in the Ping ecosystem. And Terraform!
Senior Dev, Tech Lead, Product Owner
Haventec
One of the founding developers, we took the product on a wild journey.
A true many-hats role, I was steering development, liasing with customers, guiding the team, coding
A cryptography product that was based around Java Spring Boot, Angular (with NgRX), Keycloak and Ping OpenID, native mobile SDKs
Full CI/CD AWS pipeline that deployed both to SaaS and on-prem on dockerHub
CTO, developer
Secure Venue
Developed a cross-platform alerts system for the hospitality industry - app is still on the app stores
Developed with love in C# Xamarin and Node, with a Serverless backend hosted in AWS using Lambda and S3. It sends push notifications using Pushwoosh
Patents for the idea were taken out in my name in US, Australia and New Zealand
Freelancer
Various startups, mostly as a senior developer and tech lead, coding and guiding them on their journeys
Technologies covered Angular, React, Firebase, Native Mobile (Swift and Android), Node, Java Spring Boot, Salesforce APEX
Machine Learning and Artificial Intelligence
Completed online courses by Andrew Ng, Sebastien Thrun and Peter Norvig
Masters of Innovation and Technology Management
UCD Smurfit Business School
Smurfit is Ireland's top MBA business school, this gave me learnings and perspectives that derived direct value to the startups I was part of
Services
My Specializations
Cybersecurity
I am expert in IAM, OpenID, SAML, Ping Identity, Keycloak, FIDO2, Passkeys.
I have developed an OpenId Connect 2.0 IdP from scratch.
4 ProjectsProduct Owner
I have many years experience in delivering product that is innovative, customer-focussed, addresses market pain points.
And on time.
I am expert with Agile methodologies around sprint management, story drafting, requirements tracking, solution design
I can lead a team to deliver a complex project, keeping them motivated, and within scope - and with excellent test coverage!
10 ProjectsDevelopment
I'm full-stack in many ways - Node, Java mostly in the backend, React, Angular, Native mobile in the frontend
I'm not married to any technology, and can pick new ones up pretty quick
Currently I'm spending my time with LLMs, using llamaindex with RAG, learning as much as I can
many Projectsmy skills
My Advantages
90%
Node
90%
Java
70%
Rust
90%
React
90%
Angular
90%
Swift
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90%
Android
80%
AWS
80%
Xamarin
70%
Flutter
80%
Cybersecurity
50%
Blockchain/Solidity
70%
AI/LLMs
portfolio
Featured Projects
testimonial
Trusted by Clients
Edora David
HR of Haventec
“Justin was with Haventec right from the start, when it was just himself and two other developers writing some code. He was the lead developer that implemented OpenID into the product and delivered for our first customer. Over the years, he has been the main architect of its frontend, and been responsible for ensuring the product meets customer requirements as Product Owner. He has worn many hats, as senior developer, tech lead, PO, and one of our main innovators.”
Project
Vernon Murdoch
CTO of Cybe
“I worked with Justin for 8 years, where we started Haventec and built a product that was years ahead of the market that was successfully delivered to customers within 18 months. Justin has a knack for making complex problems easy, and has an uncany ability to see into the future.”
Project
Chris Tuohy
CEO of Gigl
“Justin is a top-tier full-stack developer, with a keen eye for innovation.”
Project
Ann Crosbie
Mother of me
“What are you doing? Do I have to look at your face, I've had to look at it for 20 years that was enough! How do I get rid of this?”
Projectcontact
Let's Work Together!
justincrosbie@gmail.com
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