System Migration
System Migration — Modernise Without the Pain
At Frostleaf, we migrate legacy applications and systems to the latest tech stack — with zero downtime, no data loss, and a future-ready architecture. From framework upgrades to full re-platforms, we make modernisation safe and predictable.
System Migration
What Is a System Migration?
A system migration is the process of moving an existing application, database, or platform from one technology stack to another — usually to escape legacy limitations, reduce costs, or unlock new capabilities.
Done badly, migrations cause outages, data loss, and missed deadlines. Frostleaf runs migrations like engineering projects, not gambles — with clear plans, safe rollbacks, and zero surprises.
- ✓Legacy framework and language upgrades
- ✓Monolith to microservices re-architecture
- ✓On-prem to cloud migration
- ✓Database engine and schema migration
- ✓Front-end re-platforming (jQuery → React, etc.)
- ✓Third-party SaaS migrations and consolidations
Why Frostleaf
Why Migrate With Us?
Zero-Downtime by Default
We design migrations using strangler-fig, dual-write, and blue/green strategies so users never see a maintenance page.
Safe, Reversible Steps
Every migration is broken into small, reversible steps with clear rollback plans — so you're never one bad deploy from disaster.
Data Integrity Guaranteed
We treat your data like it's irreplaceable — because it is. Schema validation, backups, and reconciliation at every step.
Modern Architecture, Future-Ready
We don't just port code — we modernise the architecture so your new system is faster, cheaper, and easier to maintain.
Full Knowledge Transfer
Documentation, runbooks, and team training included — so your team owns the new system from day one, not just the code.
Our Capabilities
Migrations We Run
From small framework upgrades to full re-platforms — we handle migrations of every shape and size.
Framework & Language Upgrades
Move from outdated frameworks and languages to modern stacks — Angular.js → React, PHP → Node, Python 2 → 3, and more.
Monolith to Microservices
Carefully decompose monoliths into modular services using strangler-fig patterns — no big-bang rewrites.
On-Prem to Cloud
Lift-and-shift or re-architect on-prem systems to AWS, GCP, or Azure — safely, with cost optimisation built in.
Database Migrations
Move between database engines, upgrade major versions, or refactor schemas — with zero data loss and minimal downtime.
Front-End Re-platforming
Modernise legacy front-ends (jQuery, Angular.js, Knockout) to React, Next.js, or Vue — without breaking your product.
SaaS & Tooling Migration
Migrate between third-party platforms — CRMs, payment processors, analytics tools — with clean data transfer and reconciliation.
Stuck on legacy tech?
Let's plan your migration
Tell us where you are and where you'd like to be. We'll map out a safe path to get there.
Our Process
From Legacy to Modern, Safely
A staged, low-risk migration process designed to keep your system live and your data intact at every step.
Step 01
Audit & Discovery
We map your existing system — code, data, dependencies, and integrations — and document the risks before touching anything.
Step 02
Migration Strategy
We choose the right approach — strangler-fig, dual-write, blue/green, or full cutover — based on your risk tolerance and constraints.
Step 03
Target Architecture Design
We design the new architecture, data model, and deployment topology — modern, scalable, and future-proof.
Step 04
Incremental Migration
We migrate in small, reversible steps with feature flags and rollback paths — your system stays live throughout.
Step 05
Validation & Cutover
Data reconciliation, parallel runs, and load testing before final cutover — so the switch is a non-event.
Step 06
Handover & Support
Documentation, runbooks, and training for your team — plus post-migration support to make sure everything stays stable.
Testimonials
Trusted by founders & teams
Don't just take our word for it — hear from the people we've built for.
“Frostleaf delivered our app ahead of schedule. Their communication was outstanding — we always knew where things stood. No surprises, just results.”
“Working with Frostleaf was pivotal for building our chatbot platform. They understood the technical complexity and delivered a top-tier, scalable solution.”
“Their flexible collaboration and commitment to deadlines made them the perfect partner. They understood our business deeply, not just the code.”
FAQs on System Migration
Common questions, honest answers
Still have questions? Book a free call and ask us directly.
It's the process of moving an existing application, database, or platform to a new technology stack — for example, upgrading from a legacy framework, moving to the cloud, or breaking a monolith into services.
In most cases, yes. We use strangler-fig, dual-write, and blue/green strategies so users keep using the system while we migrate it in the background. Some projects have unavoidable cutover windows — we'll be upfront if that's the case.
Data integrity is non-negotiable. Every migration includes backups, schema validation, and reconciliation runs that compare old and new systems before, during, and after the cutover.
We work to minimise disruption. Our incremental approach means your team can keep shipping features during the migration, and we coordinate cutovers around your release schedule.
Very common. The first phase of any migration is an audit where we reverse-engineer the existing system and document it — both for the migration and for your team's future use.
It depends on size and complexity. Small framework upgrades can take a few weeks; full re-platforms can run for several months. We give you a clear, phased timeline after the audit.
Yes. Post-migration support is included to handle any issues that surface in the first weeks, and we offer ongoing retainers for long-term maintenance and evolution.
Get Started Today
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Book a free 30-minute call with our founder. No commitment, no pressure — just an honest conversation about your vision.
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