Modernise the legacy systems your business can’t afford to lose.
Understand what your application does, preserve the business rules that matter and plan its modernisation. Our consulting team uses Next to support discovery, design and rebuilding, with reviews and approvals configured around the work.
Every legacy system holds decades of decisions.
The code shows what it does. Rarely why.
Next finds the business rules inside.
Logic, interfaces and dependencies, drawn from the code itself.
Code. Context. Captured.
Specialists walk through the system. Reviewers correct the record.
Knowledge base approvedRebuilt cloud native, against one specification.
Every task carries its context. The code stays yours.
Plan approvedThe knowledge stays.
Always on, inside Next, long after the project closes.
The system still works. The knowledge is harder to find.
An application may have changed for years without reliable documentation. Its original developers may have left. A small team may spend much of its time keeping it running.
Changing it means first understanding what it does, what relies on it, and which behaviour must stay the same.
Knowledge depends on a few people
When they leave or retire, important details can leave with them.
Maintenance limits capacity
Keeping old systems running leaves less time for improvements elsewhere.
Change carries uncertainty
Missing logic or dependencies can lead to disruption and rework.
Assess the application, then define the work.
Start with a free assessment of your legacy application: current state, risks and the form of a proposed modernisation.
- 1
Map the system
Next agentsRead the code, documents and system access. Build a code graph, record walkthroughs with the people who know the system, and score each section for accuracy.
Your peopleDiscovery approvedGrant access and name the specialists. Reviewers correct and approve the record.
- 2
Rebuild one slice
Next agentsRebuild one module and test it against the original. Measure the time and cost, and draft a costed plan for the rest.
Your peopleSlice approvedChoose the slice with us. Engineers and reviewers sign off the result.
- 3
Modernise the rest
Next agentsBreak the plan into tasks that carry their context. Rebuild in stages, with the old system running until the new one matches it.
Your peopleProduct owners and reviewers approve each stage. Your Git, CI and security checks stay in place.
- 4
Keep the platform
Next agentsKeep the documentation current as the code changes, and apply your rules to every new change.
Your peopleYour teams use Next for every change that follows.
PREMCALC.cblpremium-serviceA private equity-backed UK software vendor modernising a monolithic Java application.
The vendor's product ran as one monolithic Java application. We took it from discovery through a complete re-architecture to a rebuilt application in 10 months, modernising its API layer and AWS infrastructure on the way.
“What does the monolith actually do, and what depends on it?”
Next reads the Java code and recovers the business rules, dependencies and integrations inside it. The vendor's engineers review the findings before any design work starts.
“What should replace it?”
A new architecture is designed from the approved discovery, with a modernised API layer and AWS infrastructure. The vendor's team approves the design before the rebuild begins.
“How long until the new application is in place?”
Discovery, re-architecture and rebuild were completed in 10 months.
Modernise the technology. Bring your people with you.
Employees need to understand the change, contribute their knowledge and learn how to work with the new processes and platform. Our consulting team combines training with practical support for adoption.
Stakeholder engagement
Agree priorities and decisions with the business owners, operations and IT teams the change affects.
Knowledge transfer
Capture what your specialists know before it is lost, and hand it on to the people who will run the new system.
New ways of working
Introduce new workflows in stages, with the old system running until the new one matches it.
Training and readiness
Prepare your teams to use, support and improve the new system after go-live.
Use the first working module to refine the wider plan.
Detailed discovery and a tested module give you evidence from your own application to refine the risks, scope, cost estimate and delivery schedule.
less time and cost than the original estimates, across four projects. Preliminary results.
Early evidence from four projectsbilling monolith rebuilt serverless, with the old system running until the new one matched it.
Case study: a legacy monolithConfigure mandatory or advisory controls within each agent workflow. Decide which actions run autonomously and which require human review or approval.
Common questions
Do we have to commit to a full modernisation?
No. The free initial assessment gives you a high-level view of the application and a proposed approach, with indicative cost and duration. You can then decide whether to commission detailed discovery or implementation.
Will AI get our business rules wrong?
Every section is scored for accuracy and approved by your reviewers. Rules the agents infer rather than read are flagged for review, not hidden.
What happens to our engineers?
They stay the owners of the logic. We work alongside them, and what they know is captured in the record rather than lost. Why engineers make or break a modernisation
Is this a service or a software product?
Both. Paradym’s modernisation team runs the programme, using the Next platform to do the analysis, planning and delivery work. The platform and everything it captures stay with you. How we work
Does our code or data leave our environment?
It does not have to. Next can run in your own cloud region, an EU sovereign cloud or on premise. We agree the deployment, access and models before any analysis starts.
Will we be locked in?
No. The code, specifications and knowledge base produced during the programme belong to your organisation.
Start with the system that worries you most.
A free initial assessment of your legacy application: what it does, what depends on it, and what modernising it would involve.