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

Rounded Text

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

Current

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 and Javascript

Its currently accepting Beta testers, feel free to give it a try!

December 2023 - Current

Freelancer/Consultant/Tinkerer-er

Currently, I'm doing some ad-hoc work for a couple of clients

Projects involve Rust and Flutter, and Java and Angular

Topics include Chat GPT APIs, Liveness detection, a bit of Jupyter notebooking

In my free time I'm knee deep in React and Solidity, making a DApp. I'ts all a bit hush-hush

Otherwise, available for hire!

June 2023 - December 2023

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!

2015 - 2023

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

2014 - 2017

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

2012 - 2015

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

2009 - 2011

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

1990 - 2012

Check out my CV!

Justin Crosbie CV

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 Projects

Product 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 Projects

Development

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 Ethereum blockchain, and React Native

many Projects

my skills

My Advantages

Node

92%

Node

Java

85%

Java

React

80%

React

Angular

90%

Angular

Swift

90%

Swift

Android

90%

Android

AWS

70%

AWS

Xamarin

86%

Xamarin

Flutter

50%

Flutter

Rust

50%

Rust

Cybersecurity"

80%

Cybersecurity

Blockchain/Solidity

50%

Blockchain/Solidity

AI/LLMs

30%

AI/LLMs

testimonial

Trusted by Clients

contact

Let's Work Together!

justincrosbie@gmail.com

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