Legacy software modernisation — Australia & New Zealand
Modernise legacy software without breaking what works. ANZ-hosted, zero downtime.
From ColdFusion to Kotlin, mainframe COBOL to serverless — we help Australian and NZ enterprises modernise mission-critical software safely, incrementally and on-shore.
Modernising legacy systems for ANZ banks, insurers & government
60+
Legacy systems modernised in ANZ
AU/NZ
On-shore hosting options
0
Post-migration outages
CPS 234
Aligned by default
ANZ enterprises modernise with us because…
01
On-shore data residency
AWS Sydney, Azure Australia East and NZ regions — data never leaves ANZ unless you want it to.
02
APRA / RBNZ literate
We speak APRA CPS 234, CPS 230, Privacy Act, and RBNZ BS11 — compliance controls in code, not just docs.
03
Strangler-fig migrations
Zero-downtime, slice-by-slice replacement. No 18-month code freezes, no big-bang cutovers.
04
Team upskilled at handover
Pair-programming and internal enablement so your ANZ team owns the modern stack when we hand over.
Modernise legacy software without the big-bang risk
Legacy audit & risk map
Codebase, dependency, security and business-risk audit with a prioritised remediation plan.
Incremental replatforming
Strangler-fig migrations from monolith to modular services — no big-bang rewrites, no downtime.
UI/UX overhaul
Rebuild dated interfaces on a modern design system while preserving muscle memory for existing users.
Cloud migration
On-prem to AWS/Azure/GCP with observability, autoscaling and FinOps built in from day one.
Test & CI/CD retrofit
Add characterization tests, pipelines and rollback so change stops being scary.
Team upskilling
Pair-programming, code reviews and playbooks so your in-house team owns the modern stack.
ROI Calculator
Estimate what modernising your legacy stack could return
Legacy software quietly bleeds budget through maintenance, downtime and slow releases. Model your recovery.
USD
hours
USD/hr
weeks
Maintenance savings / year
$240,000
Avoided downtime cost / year
$336,000
Total year-1 impact (USD)
$852,923
Includes maintenance reduction, avoided downtime and recovered release velocity.
Model based on typical outcomes across 60+ modernisations. Your figures will vary — book a call for a precise audit.
From legacy audit to modern platform — safely
01
Legacy audit
Code, data, dependency, security and business-risk audit.
02
Modernisation plan
Phased roadmap: what to strangle, what to rewrite, what to leave alone.
03
Foundations
Testing, CI/CD, observability and cloud landing zone before touching business logic.
04
Increment & migrate
Slice-by-slice replacement behind feature flags with zero downtime.
05
Retire & optimise
Decommission legacy, optimise cost and hand off to your team.
“
They modernised our 20-year-old policy admin system incrementally, no downtime, and left our team stronger than before.
Insurance
Software modernisation FAQs
No. We start with the highest-risk, highest-value slices and use the strangler-fig pattern — most engagements keep 60–80% of existing code initially.
Our modernisation approach is zero-downtime by design — feature flags, dark launches and canary rollouts.
Java, .NET, PHP, Python, Node, ColdFusion, VB6, mainframe COBOL/JCL and everything in between — we have modernised them all.
Fixed-price audit + time-and-materials or milestone-based delivery. We share risk on outcomes for larger programmes.
Book a legacy audit — safely modernise mission-critical systems.
Share your legacy brief or book a call — we respond within 1 AEDT business day.
Prefer to talk?
Book a no-obligation 30-minute call with a Kilobyte lead. We usually respond within 1 business day.
Book on Calendly↗
Got a project?Contact Us
Creative design and development agency