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Software Engineering

Application Modernization Services

What is Application Modernization?

Application modernisation brings an old system up to date — the code, the architecture, the hosting or all three — so it is cheaper to run, safer to change and ready for what the business needs next.

The risk with legacy software is not that it stops working. It is that nobody dares to touch it. We modernise in small, reversible steps alongside the old system, so the business keeps running the whole time.

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No big-bang rewriteBusiness keeps runningCloud-ready at the end

How it works

How We Modernise Without Disruption

The old system keeps running while the new one takes over, one piece at a time.

  1. Assess

    We map the code, data and dependencies, and where the risk is.

  2. Wrap

    We put a clean API in front of the old system.

  3. Replace

    Pieces are rebuilt one at a time behind that API.

  4. Migrate

    Data is moved and checked, with the old system as fallback.

  5. Retire

    The old system is switched off once nothing depends on it.

What we provide

Modernisation Services We Provide

From a code review to a full move to the cloud.

  • Legacy Assessment

    A clear picture of the system, its risks and the best path forward.

    • Code and architecture review
    • Risk and cost analysis
    • Modernisation roadmap

  • Re-architecture

    Monoliths split into manageable services where it helps — and kept whole where it does not.

    • Modular architecture
    • API layer
    • Strangler-fig migration

  • Cloud Migration

    Applications moved from servers to the cloud, with the chance to cut running costs.

    • Lift, refactor or rebuild
    • Containers and CI/CD
    • Cost optimisation

  • UI & Tech Upgrades

    Old frameworks and screens updated so the system is supported and pleasant to use.

    • Framework and language upgrades
    • Modern, responsive UI
    • Security patches

Under the hood

Old and New, Side by Side

A routing layer decides, route by route, whether the old system or the new one answers — so every step can be undone.

  • One route at a time

    Traffic moves to the new system gradually, never all at once.

  • Always reversible

    If anything looks wrong, the route flips back in seconds.

  • Measured cut-over

    Errors and speed are compared before the old code is retired.

# Strangler pattern: move traffic route by routeroutes:  - path: /customers    target: v2-service      # migrated  - path: /orders    target: v2-service      # migrated    rollout: 100  - path: /invoices    target: v2-service    rollout: 25             # 25% of traffic, watching errors    fallback: legacy-app  - path: /reports    target: legacy-app      # next quarter
Migration in progresslegacy → v2

Use cases

When It Is Time to Modernise

Legacy systems rarely fail loudly. These are the quiet signs it is costing more than it should.

  1. Nobody can change it safely

    Every change is slow and risky because the code is poorly understood.

  2. Unsupported technology

    The framework or language no longer gets security updates.

  3. Rising hosting costs

    Old servers and licences cost more each year.

  4. It cannot connect

    Modern tools and APIs cannot talk to the old system.

Technologies We Use

  • .NET
  • Java
  • TypeScript
  • Laravel
  • Docker
  • Kubernetes
  • AWS
  • Azure
  • Modern Stack.NET, Java, TypeScript, Laravel
  • ContainersDocker, Kubernetes
  • CloudAWS, Azure

We work with the legacy stack you have and the modern stack you are moving to.

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Our process

Our Modernisation Process

Assess honestly, plan the safest order, then modernise in small steps you can reverse.

  1. Assess

    We review the code, data and hosting, and rank the risks.

    • Assessment report
    • Risk map

  2. Plan

    We choose rebuild, refactor or move for each part, in order.

    • Roadmap
    • Target architecture

  3. Modernise

    We replace parts step by step, alongside the running system.

    • Migrated modules
    • Data migration

  4. Retire

    We switch off the old system once everything runs on the new one.

    • Decommission
    • Support plan

Start here

Not sure where to start with legacy?

Tell us about the system and what worries you most. We will suggest the safest first step and what it would change.

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Why Proponent

Modernisation Without the Big-Bang Risk

We have seen rewrites fail. So we modernise in steps that each deliver value and can each be undone.

Countries Served
70+
Projects Completed
600+
Hours Support
24x7
Office Locations
5

  • Step by step

    Small, reversible changes instead of one risky switch-over.

  • Business as usual

    The old system keeps working until the new one is proven.

  • Data kept safe

    Every migration checked and reconciled before cut-over.

  • Lower running costs

    Cloud hosting and fewer licences once the move is done.

  • Secure and supported

    Modern, patched technology replaces the unsupported stack.

  • Find out what your legacy system is really costing.

    Share a little about the system. We will outline the risks and a modernisation path that fits your budget.

Start a project

Tell us what you are building

A few lines is enough to start. Tell us the problem, not the solution, and we will come back with the questions that shape the plan.

What happens next

  1. We read it properly

    Someone who would work on the project reads your note and comes back with questions, not a sales script.

  2. We scope it together

    One call to agree the problem, the constraints and what finished looks like — before anyone talks about price.

  3. You get a proposal

    Scope, sequence, timeline and cost, in writing, with the risks we would plan for named up front.

To learn more about how we protect your data, please refer to the Proponent privacy policy.

Next step

Your Partner For What Comes Next. Let's Start The Conversation.

Starting is the easy part. Tell us where you are and what you are trying to reach, and we will map the route — the scope, the sequence, and the risks worth planning for now rather than later. From that first conversation through build, launch and everything after, the same team stays with it.

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