From legacy stack to modern architecture
10+ year Windows app, PHP monolith or Excel-bound workflow → modern stack with phased deployment. No big bang, no two-year project.
Triggers
Typical transformation triggers
Legacy stack doesn't scale
A 10+ year PHP, .NET or Java system. New features take six weeks, bug fixes two. Senior engineers leave; juniors won't touch it.
Security risk grows
PHP 5.6, Node 12, jQuery 1.x. Dependencies haven't moved in years. Every pen-test comes back red.
Cost spiral
On-prem server crew costs $20-40k a year. A senior maintainer $3k+ a month. The legacy stack carries $40-80k a year in cost — and brings in no new revenue.
Acquisition or due diligence
An investor or acquirer wants a modernised stack. Legacy can cost a 30-50% valuation discount.
Process
How we work
Strategy
Audit plus migration roadmap. Strangler pattern, phased module-level deployment. Never a big bang.
Pilot
One selected module on the new stack, measured in production. 4-8 weeks with real user feedback.
Migration
Module by module rollover. Legacy and modern stack run in parallel for a gradual cutover.
Handover
Knowledge transfer and documentation. Your team continues independently. Zero vendor lock-in.
Output
Transformation project deliverables
- Migration roadmap: module-by-module schedule, risk matrix, time and cost estimate
- New stack in production: Next.js / Node / Postgres foundation
- Legacy stack interface: API gateway between the two systems for gradual cutover
- Data migration: ETL pipeline, validation, rollback plan
- Training for your in-house team to continue on the new stack
- Decision log: every architecture choice documented so it still makes sense in two years
Stack
Migration stack
Modern, production-tested tooling.
- Next.js
- TypeScript
- Node.js
- PostgreSQL
- Prisma
- Redis
- Kafka
- Docker
- Kubernetes
- Terraform
- AWS
- Cloudflare
Timeline
Typical transformation project
Phase 01
Strategy + audit
3-4 weeks
Roadmap, scope, risk register.
Phase 02
Pilot + migration
3-6 months
Module-by-module rollover, parallel run.
Phase 03
Handover
4-6 weeks
Training, documentation, support handover.
Pricing
Transformation packages
Strategy is fixed-price; migration runs T&M or fixed-scope per module.
Strategy audit
from €0,0
3-4 weeks
Audit plus a 12-18 month migration roadmap. Your team executes it.
- Stack audit + cost model
- Migration roadmap
- Risk matrix
Pilot module
from €0,0
8-12 weeks
One selected module on the new stack, live. Proves the roadmap.
- Pilot module production-ready
- API gateway setup
- Data migration
Full transformation
on request
3-12 months
Complex multi-year scope. Discrete phases with measurable milestones.
- Multiple module rollovers
- Fortnightly milestone review
- Continuous handover
FAQ
Frequently asked
30-minute transformation call
You tell us the current stack and pain points. We outline a roadmap within one business day.