Software Modernisation

Turning legacy systems intomodern experiences

Mobile home screen with app icons on a blue gradient background

Capabilities

Legacy Assessment & Strategic Roadmapping
Application Re-architecture
Cloud Migration & Infrastructure
API Development & Systems Integration
Front-end & Interface Modernisation
DevOps & Delivery Modernisation

Trusted by ambitious organisations across every major sector

  • WWF Logo
  • Utility Warehouse Logo
  • Undo Logo
  • Triple Point Logo
  • Third Space Logo
  • The Alan Turing Institute Logo
  • Smarkets Logo
  • Shell Logo
  • Royal Foundation Logo
  • Qaitum Logo
  • Power League Logo
  • Petex Logo

WorkModernisation in practice.

  • Prisym ID

    A flagship ERP transformation for a world-leading pharma software provider.

    • Digital Transformation
    • Software Modernisation
    • Software Development
  • Utility Warehouse

    A streamlined ERP modernisation that accelerated training for Utility Warehouse's call centre team

    • Digital Transformation
    • Software Modernisation
    • Software Development

ApproachIncremental progress. Sustained stability

  • Abstract product interface collage

    Preserve before you replace

    The full technical estate is assessed and mapped before any architecture is proposed, determining what to preserve, what to replace and how to sequence the work around live operational environments.

  • Team reviewing a digital product on screen

    Incremental value

    Modernisation does not pause the business. Complexity is reduced in stages, delivering measurable improvement at every step.

  • Mobile product screens in a dark studio

    Engineered for longevity

    Modernised systems are built with long-term maintainability in mind, clean architecture, documented codebases, and the support structures to keep your systems performing beyond go-live.

The full technology estate

From customer experience to core infrastructure

Plug & Play modernises both, the digital products your customers interact with and the operational platforms your teams depend on.

  • The brand experience

    Rebuild customer-facing platforms for performance, design quality, and the scalability to grow with the business.

  • The operational backbone

    Modernise back-office platforms, internal tools, and operational infrastructure, improving efficiency, integration, and long-term maintainability.

Technologies

  • Angular
  • React
  • Next.js
  • Storyblok
  • Supabase
  • Electron
  • PHP
  • .NET

From the team

Phil MarklewHead of Development

Software Modernisation Industry Leaders

  • Peter Richman

    Peter Richman

    Managing Director

  • Gabriel Davenport

    Gabrielle Davenport

    Operations Manager

  • James Nixon

    James Nixon

    Creative Director

  • Dino Rakitzis

    Dino Rakitzis

    Commercial & Delivery Manager

  • Phil Marklew

    Phil Marklew

    Head of Development

  • Phil Chambers

    Phil Chambers

    Technical Director

SaaS Enablement

Plug & Play supports established software businesses making the transition to SaaS delivery, rethinking architecture for multi-tenancy, integrating billing and authentication systems, and redesigning the operational model that comes with it. The team has navigated this transition before and brings that hard-won experience to every stage of the journey.

3MB max file size

Drag and drop here or

By submitting you agree to our Terms & Conditions

Have questions?

Yes. Software Modernisation is one of Plug & Play’s core specialisms and the team regularly works with legacy systems, integrating with, extending, or evolving what’s already there. Whether the right approach is incremental modernisation or a larger overhaul is assessed based on what the business actually needs.

Carefully sequenced delivery is the answer. Plug & Play designs modernisation programmes around the operational reality of the business, working in parallel with live systems, reducing risk at every stage and ensuring continuity is protected throughout. Nothing is switched off before the replacement is proven.


Replacement is rarely the right answer. Most legacy systems carry years of embedded business logic that would be expensive and risky to recreate. Plug & Play's starting point is always a full assessment of the estate, understanding what to preserve, what to rebuild and how to sequence the work for minimum disruption.

Software modernisation addresses the technical estate,  the architecture, infrastructure and codebase. Digital transformation is broader, encompassing strategy, operating model and organisational change alongside the technology. The two often overlap and Plug & Play delivers across both.

It varies significantly by complexity, but Plug & Play takes a phased approach, delivering measurable improvement at each stage rather than running a multi-year programme before anything changes. Most organisations see meaningful progress within the first six months.