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Kairosys

Application Modernization

Legacy systems hold your business back, but replacing them is risky and expensive. You need a path forward that minimizes disruption.

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Strangler Fig Pattern
Migration Method
Zero-Downtime Incremental
Risk Profile
45% Maintenance Reduction
Cost Impact
35% Developer Retention Boost
Team Outcome
System Architecture

A multi-layered approach to building software that scales.

Select a tier to explore how each layer contributes to the whole.

Decision Intelligence

Modernization Strategy

The strategic layer that determines what to modernize, when, and how to manage risk throughout the process.

Inspection Points

Risk Assessment

Evaluating which legacy components carry the highest business risk if they fail

Migration Priority

Ordering modernization efforts by business impact and technical dependency

Rollback Strategy

How to revert if a modernization step causes unexpected problems

Connected Layers

Data & Knowledge Client Experience
How We Work

A structured, transparent process from first conversation to production launch.

01

Assessment

Week 1–2

Honest evaluation of your legacy system. What works, what doesn't, and what's actually at risk.

Assessment Report
02

Strategy

Week 2–3

Choose modernization approach: strangler fig, lift-and-shift, or rewrite. Based on your risk tolerance and timeline.

Modernization Strategy
03

Foundation

Week 3–4

Set up modern development practices: CI/CD, testing, monitoring. Create the safety net for incremental change.

DevOps Foundation
04

Incremental Migration

Week 4–10

Migrate module by module. Each migration is small, reversible, and delivers measurable improvement.

Migrated Modules
05

Validation

Week 10–12

Verify that the modernized system matches or exceeds the original behavior. Performance testing and user acceptance.

Validation Report
06

Optimization

Ongoing

Continuous improvement of the modernized system. Performance tuning, cost optimization, and further decomposition.

Optimization Roadmap
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What You Get

Everything you need, delivered as working software your team can ship with confidence.

Legacy Assessment

Honest evaluation of where you stand and what actually needs to change.

A clear picture of your risks, priorities, and the fastest path to improvement.

Risk scoring Code quality audit Dependency mapping Prioritized roadmap

Modernization Strategy

A phased plan that minimizes risk while delivering value at each step.

A modernization roadmap your whole team can follow, with clear milestones.

Strangler fig approach Risk mitigation Clear milestones Success criteria
Evidence in Practice

Real outcomes from real engagements.

0 days
Downtime
20x faster
Deployment Speed
45% lower
Maintenance Cost
+35%
Developer Retention
"
We were trapped by our legacy system. Every change took months and broke things. Kairosys used the strangler fig pattern to modernize piece by piece. Our team went from dreading deployments to shipping weekly.
RK
Rachel Kim
VP of Engineering, Pacific Insurance Group
Case Highlight

Insurance company modernized 15-year-old policy admin system without a single day of downtime

Read case study
Related Work

See how this connects to the problems you're solving and the services that complement it.

Related Solutions

Modernize Existing Software

Your legacy software is holding you back, but replacing it is risky and expensive. You need a path forward that minimizes disruption.

Explore solution

Discuss Your Project

Tell us about your situation. We'll share what we've seen work and whether we're the right fit.

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