Product & Platform Engineering

Application Modernisation

Modernise ageing applications incrementally, without interrupting the operations that depend on them.

Book a free discovery sessionSee our work
Projects delivered
80+
Countries served
16
Global offices
4
Founded
2021

The challenge

Where teams get stuck

The problems we're most often brought in to solve.

  1. 01

    Change is slow and high-risk

    Minor requirements take weeks because the code is tightly coupled, poorly documented and lacks automated tests to catch regressions.

  2. 02

    Platform skills are disappearing

    The language, framework or hosting platform is out of support, and engineers able to maintain it are increasingly scarce.

  3. 03

    A full rewrite is unacceptable risk

    The system runs critical operations, so a long rewrite with a single cut-over date is not a risk the business can accept.

Overview

Application Modernisation at VulcanTech

Legacy application modernisation is the process of moving ageing software onto a supported, maintainable stack without disrupting the operations that depend on it. VulcanTech works in controlled increments: assessing code and data, exposing critical functions through APIs and replacing components one at a time while the existing system keeps running. The outcome is a platform your team can change safely, staff readily and host on current infrastructure, without a high-risk single cut-over.

Key deliverables

  • Legacy system assessment report
  • Modernisation roadmap and sequencing plan
  • API layer for legacy functions
  • Migrated data with reconciliation reports
  • Rebuilt modules on a supported stack

What you get

What Application Modernisation includes

  • Codebase and data assessment

    A written review of architecture, dependencies, data quality and risk, with a recommended modernisation route and sequence.

  • Incremental replacement

    Components replaced one at a time behind a stable interface, so users keep working while the platform changes underneath.

  • API enablement of legacy functions

    Critical legacy functions exposed through documented APIs, so new applications can use them before they are rebuilt.

  • Controlled data migration

    Mapped, cleansed and rehearsed migrations with reconciliation checks, so records arrive complete and consistent.

  • Characterisation testing

    Automated tests that capture current behaviour before change begins, reducing the risk of silent regressions.

  • Cloud re-platforming

    Workloads moved to containers and managed cloud services, with infrastructure defined as code.

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Our process

How we deliver

A delivery process you can see into — from first workshop to production support.

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  1. 01

    Discovery

    A focused working session on your objectives, constraints and existing systems. It concludes with a scoped proposal and a clear view of value, risk and effort.

  2. 02

    Architecture & planning

    We agree the target architecture, data model and integration approach before product code is written, and secure your sign-off.

  3. 03

    Iterative delivery

    Working software reaches a staging environment on a regular cadence, giving stakeholders continuous visibility and the ability to steer priorities.

  4. 04

    Assurance & hardening

    Automated testing, accessibility and performance budgets, and a security review are completed before anything reaches production.

  5. 05

    Launch & continuity

    We manage cutover and remain engaged through an agreed support period, with a structured handover to your teams or ongoing operation by ours.

Engagement models

Work with us the way that suits you

Explore engagement models →

  • Outcome-based delivery

    A defined scope, timeline and commercial model agreed after discovery. We own delivery risk against the agreed outcomes.

    Best for: Well-defined initiatives, MVPs and first releases

  • Dedicated product teams

    A cross-functional pod — engineering, design, QA and delivery leadership — aligned to your roadmap and scaled as priorities change.

    Best for: Long-term product development and evolving roadmaps

  • Team extension

    Senior engineers embed in your organisation, work inside your processes and report to your leaders — on contracts that assign all IP to you.

    Best for: Adding specialist capability without growing headcount

Tools & technologies

The stack we build with

  • .NET
  • Python
  • Django
  • Node.js
  • PostgreSQL
  • Docker
  • Terraform
  • AWS

Why VulcanTech

A partner, not a vendor

Senior engineering, honest delivery, and work we can name.

  • Senior engineers own delivery

    The engineers who scope your programme in discovery are the engineers who deliver it. There is no hand-off to a junior bench after contract signature.

  • Engagement models that fit

    Outcome-based delivery, dedicated product teams, team extension or global capability centres, matched to how your organisation prefers to work.

  • A verifiable track record

    Every customer story we publish describes real production work, naming the client wherever confidentiality allows, including public-sector platforms secured through competitive tenders.

  • 80+ projects in 16 countries

    Delivered since 2021 across the public sector, real estate, healthcare, manufacturing and consumer technology, for regulated and high-growth organisations alike.

Customer stories

Proven delivery

All customer stories →

FAQ

Frequently asked questions

Can't find what you need? Ask us in the discovery session.

No, and we usually advise against it. We favour an incremental approach in which new components progressively take over from old ones behind a stable interface. This keeps operations running, spreads investment over time and delivers value from early phases. A full rewrite is considered only when the existing system cannot reasonably be extended or wrapped.

Free discovery session

Start your Application Modernisation project

Tell us what you're building. You'll hear back from an engineer, not an inbox.

  1. 1We reply within one business day to set up a 30-minute call.
  2. 2A senior engineer — not a salesperson — walks through your problem.
  3. 3You get a scoped proposal with timeline and cost. No obligation.

New projects & sales

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Existing clients & support

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