Software Engineering · Web Applications · Online Integrations

We Build Web Applications
and Online Integrations

KoalaDigital helps businesses build software, improve their online customer journey and access the technical capability needed to move projects forward.

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Bach LySenior Software Engineer

17+ Years
Commercial software engineering
10+ Big Techs
Australian & global teams
1,000+ Pages
Reviewed & improved
Real Results
Conversion, speed & performance

Experience across teams at

What we do

How KoalaDigital Can Help

How we work

Build New. Improve What Works.
Rescue What Doesn’t.

Build
Turn an idea or a business need into a working web application — scoped so the first version is something you can actually put in front of people.
Improve
Make an existing website, application or system faster, clearer and easier to use, without starting again.
Rescue
Bring a delayed, outdated or difficult project back under control, starting with an honest read on where it actually is.

Recent work

Built for Teams and Businesses Across Australia

From clinician portals and online banking to party bookings — a selection of what we have built, modernised and looked after.

WonderWorld Play Centre
Online party bookings, connected to Square
Packages, rooms, live availability, deposits and invoices — every booking lands in Square, and the old diary came across with it.
Next.js · Square APIs · Resend
We Fix Sliding Doors
A local ads funnel built for calls and quotes
One page for paid local traffic: call-first actions, a quote form with photo uploads, and an admin view of where every visit and enquiry came from.
Next.js · Postgres · Resend
Cochlear
A global telehealth platform for clinicians
Senior front-end engineer and technical lead: extended and scaled the platform, and refactored a legacy codebase onto a modern React stack.
React · Express · GraphQL
Pepper Money
One website where there were three
Consolidated the broker portal, customer website and corporate site, and retrofitted the internet banking portal for mobile.
HTML5 · Sass · Angular · Node.js
ResMed
A refreshed patient-management system
A digital refresh of AirView, ResMed's patient-management system, and a UI component library for it.
Universities & ANMF SA
Systems for universities and nurses
Student survey and equipment-management systems for UTS, UNSW and Griffith, and an online learning platform for Australian nurses.
Online retailers
Ecommerce stores that had to keep selling
Ongoing development and maintenance of online stores for Bing Lee, Princess Polly, Paddy Pallin and Costume Box.
Magento
Rowmark Australia
A product website built for mobile
The product catalogue and a library of how-to engraving videos, laid out for customers on their phones.

Experience

17+ Years of Building Things That Had to Work

Across retail, finance, healthcare, telecommunications and higher education — websites, applications, portals and internal systems used by real teams every day.

Five out of five stars
“Bach worked extremely well with the external vendor and UX designer to retrofit our Online Banking Portal. Many thought it was impossible due to the outdated technology it was built on, but Bach used his frontend expertise to bring our portal to a modern state in a very short time. He helped us quickly deliver more value to our customers while saving cost and time.”
Karl Esber
GM Asset Finance · Pepper Money
Five out of five stars
“Bach was well-versed in designing & developing streamlined solutions for our Clinician Portal at Cochlear. Thanks to his work, we were able to scale up quickly and resolve many issues for hospitals and clinics around the world.”
Abid M
Digital Transformation · Cochlear
Five out of five stars
“At CommSec, Bach demonstrated his expertise as our most experienced front-end engineer by tackling complex projects with proficiency. He collaborated closely with engineers and the UX/VD team, bringing ideas to life. Bach consistently offered valuable improvements and delivered challenging UI designs. When the UX team started working on a Design System, Bach eagerly volunteered and delivered a great component library. His calm, measured approach made him a pleasure to work with, and he always prioritized delivering the best results for our customers. I would have no hesitation in working with him again.”
Justin Goldberg
Head of Engineering · worked together at CommSec
Five out of five stars
“Bach transformed our cloud application into a cutting-edge React application, significantly reducing unexpected bugs. The robust frontend foundation he established enabled our team to expand rapidly and deliver new features quickly. I highly recommend Bach for any team looking to develop a modern, state-of-the-art SaaS application.”
Aaron Kwan
Product Manager
Five out of five stars
“In my experience working with Bach at CommSec, his contributions to the frontend and UX were outstanding. He consistently communicated effectively and delivered UI features promptly, which was key to our team meeting deadlines at very high quality.”
Kon Stormozhev
CTO · worked together at CommSec
Five out of five stars
“Bach is a fantastic developer to work with. He’s consistent, adaptable, and truly cares about the code he writes. On a rebranding project for a large medical web application, Bach dug into implementation details, experimented with CSS techniques for complex design elements, and kept the project on track and on time. When designs were too complicated or expensive to implement, he negotiated workable compromises with stakeholders. Bach is self-sufficient, diligent, and dependable. If I ever have the opportunity to work with him again, I will go out of my way to make it happen.”
Cody Jenkins
Senior UI Developer · ResMed
Five out of five stars
“I had the great pleasure of working with Bach at CommSec. He is enthusiastic, passionate, and detail-oriented, never shying away from complicated problems. He excels in front-end development and has extensive knowledge of frameworks and web standards. As a great team player, he became the go-to person for anything related to JavaScript. I would not hesitate to recommend him.”
Robert Shi
Senior Engineer · worked together at CommSec
Five out of five stars
“Bach is a very experienced UI/UX Developer. He quickly understands business intentions and requirements, efficiently converts designs into functional frontend solutions, and communicates constructively with team members to foster a positive team spirit.”
Tim Wang
Engineering Manager · ING Australia
Five out of five stars
“Bach also demonstrated his creativity and technical competence by collaborating and sometimes mentoring fellow Java back-end developers when implementing AirView functionality and issue fixes. Bach often demonstrated great effort and commitment beyond the expectation of his role by working overtime to meet the challenging deadlines on the project.”
Kiet Nguyen
Senior System Engineer · ResMed
Five out of five stars
“Top developer. Unlike many others, Bach analyses requirements and performs impact analysis before writing code. He follows Agile principles well and is a strong fit for any team.”
Kaifi Hasibul
Senior Project Manager · Pepper Money