Migration and modernization company
0
%
of legacy migration projects exceed budget or timeline. We are the other 27%.
Migration and ModernizationMigration that ships on schedule. Legacy systems replaced without rewriting history.
We replace legacy monoliths, outdated infrastructure, and brittle codebases with cloud-native architecture, zero-downtime deployments, and continuous integration and delivery pipelines. Every migration starts with an assessment before any code moves.
Current engagement
Monolith Migration • Phase 3 of 6
In progress
Assessment
Done
Architecture
Done
Decompose
0%
Data migration
Queued
CI/CD build
Queued
Cutover
Queued
On time
Sprint 14
Services split
6 / 18
Downtime
Zero
The migration failure pattern
Legacy systems do not fail all at once. They fail incrementally, one missed deadline at a time.
0%
of migrations exceed original budget
Most caused by under-scoped data complexity and undocumented
integration dependencies.
0x
more expensive to rearchitect in production versus designing it
right from Sprint 1
The cost of discovering architectural flaws post-launch is not
linear.
0%
of developers report reduced productivity on legacy codebases
each year technical debt compounds
Staying on legacy is not free. It has a compounding cost that
grows faster than migration.
Undocumented dependencies
Nobody mapped what the legacy system actually connects to before
the migration started. Discovery happens mid-build, after budget
is committed.
No rollback plan
The cutover happens as a single large event. When something
fails at go-live, there is no documented path back to the old
system.
Big-bang migration
The entire system is moved at once. No incremental traffic
shifting. No parallel validation. One high-risk cutover weekend
that everyone dreads.
Architecture before and after
Drag to reveal the exact difference between what you have and what you get.
This is not a concept diagram. This is a representative sample of the architecture and deployment pipeline we ship. Drag the divider left to see the legacy state, right to see the modernized state.
Legacy monolith architecture
# app/controllers/orders_controller.rb
classOrdersController<ApplicationController
defcreate
# validate, inventory check, payment,
# email, logging - all inline
@order =
Order.create(params)
InventoryService.deduct(@order)
PaymentGateway.charge(@order)
Mailer.send_confirmation(@order)
Logger.log(@order)
end
end
Single deploy unitTightly coupledManual deploysOne failure = full outage
Cloud-native microservices architecture
# order-service/src/handlers/create.ts
export constcreateOrder =
async (ctx) => {
const order =
await
OrderRepo.create(ctx.body);
// Publish event, services handle their own concerns
await eventBus.publish({
topic:
'orders.created',
payload: order
});
return ctx.ok(order);
};
Independent servicesEvent-drivenZero-downtime deploysIsolated failures
Legacy
Modernized
Drag left or right to compare
Deploy frequency
Weekly at bestMultiple/day
Recovery time
4+ hoursUnder 7 min
Scale unit
Whole appPer service
Test suite
Fragile / slowFast / isolated
Migration and modernization capabilities
Four migration types. One consistent approach: assess before you move anything.
Monolith to microservices
01
Monolith to microservices migration
We use the strangler fig pattern: extract the highest-value service domain first, run it in parallel with the monolith, then route traffic incrementally. We do not attempt a full rewrite. We migrate service by service with zero downtime at each phase.
Strangler figEvent-drivenKubernetes
Monolith to microservices migration →Orders ServiceLive100% traffic
Inventory ServiceRouting60% traffic
Payments ServiceBuilding0% traffic
Legacy MonolithStrangled40% remaining
Cloud migration
02
On-premises to cloud migration
Lift-and-shift gets you to the cloud. Cloud-native refactoring makes it cheaper to run there. We do both in sequence: move first, optimize second. We define the target cloud architecture, provision infrastructure as code, and migrate workloads in stages with rollback gates at every phase.
AWS / Azure / GCPTerraform / BicepZero-downtime cutover
Cloud migration services →
Migrated
14 / 22
workloads
Est. savings
$8.4k
per month
All environments reproducible from Terraform • Zero portal
drift
Legacy modernization
03
Legacy application modernization
PHP 5 to PHP 8. Rails 3 to Rails 7. .NET Framework to .NET 8. We upgrade and modernize legacy applications by replacing deprecated libraries, refactoring anti-patterns, adding automated test coverage, and shipping continuous integration and delivery pipelines so every future change is safe and fast.
PHP modernization.NET upgradeTest coverage
Legacy application modernization →
✔ php-lint .......................... 4s
✔ unit-tests (847 passed) ........... 38s
✔ integration-tests ................ 62s
✔ sast-scan (0 critical) ........... 14s
✔ build-image ...................... 28s
✔ deploy:staging .................. 12s
Software migration
04
Platform and data migration
Ecommerce platform changes, database engine migrations, content management system replacements. We build migration scripts with dry-run capability, run parallel validation against both systems, and define a clear cutover point with a documented rollback path. We do not migrate without a verified rollback plan.
Dry-run scriptsParallel validationRollback plan
Software migration services →users284,719 / 284,719
orders1,847,221 / 1,847,221
media_assets14,832 / 14,850 • checking
Dry run complete • 0 data loss • Rollback verified
Client result
SaaS platform modernization: legacy monolith to cloud-native microservices on AWS in 20 weeks.
SaaS PlatformCloud-native migration
A business-to-business SaaS platform required modernization of
a legacy monolithic application to improve scalability,
reliability, and deployment speed. The objective was to
transition to a cloud-native architecture supporting faster
releases and resilient operations without disrupting existing
users.
0x
faster deployment velocity
0%
unplanned downtime post-launch
Architecture delivered
AWS EKSDockerContinuous integration and delivery pipelinesMicroservicesRolling updates
Migration timeline • 20 weeks
Weeks 1-2
Migration readiness assessment
Codebase audit, dependency mapping, and target architecture
defined. 47 integration points documented before any code
moved.
Architecture Decision Record approvedWeeks 3-6
Service boundary extraction
Authentication, billing, and user management extracted
first. Docker containers built. AWS EKS cluster provisioned
via Terraform.
3 services extracted, zero downtimeWeeks 7-14
Core domain migration and continuous integration and
delivery
Core application domains migrated with parallel validation.
Continuous integration and delivery pipelines with automated
testing and rolling deployments built per service.
Deploy frequency: weekly to 8x per dayWeeks 15-18
Traffic migration and cutover
Incremental traffic routing: 10%, 25%, 50%, 100%. Each
increment validated for 48 hours before the next. Rollback
tested and confirmed at each gate.
Zero unplanned downtimeWeeks 19-20
Legacy decommission and handover
Legacy system decommissioned after 30 days of parallel
operation. Full runbook, monitoring dashboards, and on-call
playbook handed to client team.
Full ownership transferredWhy Redefine for migration
Three reasons migrations succeed here that fail elsewhere.
01: Architecture first
We document the full system before moving anything
Every migration starts with a 2-week assessment: codebase audit, dependency map, integration inventory, and target architecture. Most migrations fail because undocumented dependencies are discovered mid-build. Our assessment removes that risk before any code moves.
Legacy modernization →02: Incremental delivery
No big-bang migrations. Value in every sprint.
We use the strangler fig pattern for application migration and incremental traffic routing for cutover. Each phase delivers something in production and has a documented rollback path. You are not waiting 6 months to see results. Sprint 1 ships to production.
Software migration services →
03: Rollback as a first-class deliverable
We test the rollback before we test the cutover
Every data migration script has a dry-run mode and a verified rollback. Every traffic routing phase is validated against the rollback path before advancing. The cutover weekend is not the moment you discover whether rollback works. It should already be tested and boring.
Monolith to microservices →Common questions
What chief technology officers and engineering leads ask before a migration engagement.
We handle legacy application modernization, monolith to microservices migration, cloud migration, database migration, and platform re-architecture. See the full list of migration services at software migration services and monolith to microservices migration.
We use a strangler fig pattern for most migrations: build the new system alongside the old one, route traffic incrementally, and decommission legacy components only after the new system is proven. Zero-downtime deployments are enforced through blue-green or rolling update strategies from the first production release.
A legacy application modernization typically takes 3 to 6 months depending on codebase size, integration count, and data complexity. A monolith to microservices migration typically runs 4 to 8 months. We scope the timeline against your actual codebase during the assessment before quoting, and deliver value in every sprint rather than at the end.
Data migration is scoped as a separate workstream from application migration. We build migration scripts with dry-run capability and a rollback path, run parallel validation against both systems, and define a clear cutover point with zero data loss. We do not migrate data without a validated rollback plan.
Staying on legacy compounds. Developer productivity on legacy codebases degrades 10 to 30 percent per year as technical debt accumulates. Unplanned outages on monolithic systems cost 3 to 8 times more to recover from than on distributed architectures. Most clients recover migration costs within 12 to 18 months through reduced ops overhead and faster release velocity.
Book a migration assessment
Tell us about your legacy system.
We respond within two business days. No commitment. No pitch.
Form
Submit brief → call within 48 hours → migration readiness assessment in 3 days → Sprint 1 starts week 2
48 hours
Response
0
Downtime required
Sprint 1
Ships to production
Rollback
Verified first
Your legacy system does not have to be a liability. It can be
your next competitive advantage.