# Legacy modernization without the big-bang rewrite.

Incremental migration of aging monoliths and on-prem systems. Strangler patterns, no big-bang rewrites, and the business keeps running throughout. A modern, cloud-ready system, migrated piece by piece while the business keeps running. Most clients start with a fixed-fee Discovery, then move to a dedicated pod.

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## What it is

Legacy systems usually run the parts of the business that matter most. We modernise them the careful way: in small, verified steps.

## What you get

A modern, cloud-ready system, migrated piece by piece while the business keeps running.

- An assessment of the current system and a migration roadmap ordered by business risk
- A strangler-pattern plan, so old and new run side by side during migration
- Re-platformed services, split into microservices only where it helps
- Data migration with verification at every step
- Cutover plans with rollback options
- Documentation for the new system

## Small, verified steps. Your tools, your time zone.

1. **Discovery**: We map the existing system, its dependencies and the riskiest parts, and agree the order of migration.
2. **Migrate incrementally**: One capability at a time moves to the new platform, verified in production before the next begins.
3. **Retire the old system**: Once nothing depends on it, the legacy component is switched off.

## Related case study

[Legacy pharma SaaS re-platformed to cloud-native](https://www.winapps.co.in/work/pharma-saas-replatform/) ([Markdown](https://www.winapps.co.in/work/pharma-saas-replatform.md)): Incremental migration to containerised services, with mobile-first tools for reps and GDPR-compliant data handling.

## Technology we use

- Kubernetes
- PostgreSQL
- Kafka
- Go
- Node.js
- AWS
- Azure

We work in your cloud accounts and repositories, with access you grant and can revoke.

## Frequently asked questions

### Why not rewrite the system from scratch?

Big-bang rewrites carry the most risk. Migrating incrementally keeps the business running and lets you see progress in production at every step.

### Can you work with an old or undocumented codebase?

We start with Discovery to map the system and its dependencies before proposing any change.

## Tell us what you're building.

A senior engineer, not a salesperson, replies within one business day. NDA available before any detailed discussion.

- [Book a 30-min intro call](https://www.winapps.co.in/contact/)
- Email us: [sales@winapps.co.in](mailto:sales@winapps.co.in)
- Or message us on [WhatsApp](https://wa.me/917015796830), or call [+91 70157 96830](tel:+917015796830).