Most enterprise application portfolios are a mix of platforms that have outlived their original purpose, point integrations that nobody owns, and a handful of newer systems that work well. Our job is to look at the whole estate honestly and decide what to modernise, what to replace, what to integrate and what to retire — in an order that keeps the business running.
Modernisation is rarely a technology problem. It is an operating-model problem with a technology consequence. We staff engagements with senior people who can hold both threads — architecture decisions on one side, sequencing and change management on the other.
What we do
Portfolio assessment
We map the application estate against the business capabilities it supports, the cost it carries and the risk it represents. The output is a portfolio view leadership can act on, not a 200-page report nobody opens.
The assessment typically takes four to six weeks for mid-size estates. We look at run cost, technical debt, criticality, integration density and the people skills required to keep each system alive. The decisions that follow are then tied to that evidence.
Replatform and rearchitect
Lift, refactor or rebuild — chosen per application rather than as a blanket strategy. We move workloads to the right substrate (managed services, container platforms, SaaS) and rework the parts that will not survive the move.
The fastest mistake to make is treating modernisation as a uniform technical exercise. The bus-route applications and the brake-pedal applications are not the same risk, and we sequence accordingly.
Integration and data flow
Event-driven integration, API platforms and the data contracts that keep them honest. We treat integration as a product, not a project — versioned, observable and owned.
Our default architecture uses event streams for state propagation, REST/GraphQL for synchronous queries and batch ETL only when latency and volume make the others uneconomic. The choice is per integration, not per programme.
Decommission
The most under-appreciated phase. We document, migrate data, switch traffic and close systems properly so they actually stop costing money instead of lingering as zombie infrastructure.
We have shut down dozens of legacy systems for clients. Every one of them released a maintenance budget that we could redeploy into the modernised portfolio.
How we sequence the work
- Start with the assessment — no commitment to a target architecture until the data is in.
- Pick a small wave of applications for the first migration to prove the operating model.
- Run modernisation as a programme of small parallel waves, not a single big-bang cutover.
- Build the new operating model as we go so the platform team can operate without us.
- Decommission ruthlessly — every legacy system kept alive is a tax on the new architecture.