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Modernise legacy systems
without breaking the business

We move older systems to the cloud in planned waves. The secure foundation is built first, every cut-over is rehearsed with a way back, and monitoring is ready on day one, so the business keeps running during and after the move.

To kick off a scoped project
1–2 weeks
Daily overlap with your team
4+ hours
Monthly per squad, no hourly bills
Flat fee
Your code, designs and IP
100%

What's included

What we
build for you

6 capabilities, delivered by one squad. Use what you need now and add more as you grow.

  • 01

    Discovery and rationalisation

    A list of every application, what depends on what, how risky each one is to move and the best route for each.

    • Application portfolio map
    • Wave planning
  • 02

    Landing zone engineering

    A secure cloud foundation with identity, networking, logging and policy rules in place before anything moves.

    • IAM and network segmentation
    • Centralised logging
  • 03

    Migration and cut-over

    Each workload is rehosted, replatformed or refactored, then cut over with a rehearsal, tests and a rollback plan.

    • Blue/green cut-overs
    • Rollback playbooks
  • 04

    DevSecOps automation

    CI/CD pipelines with security scans and policy checks, and infrastructure defined as code so it can be rebuilt at any time.

    • IaC and pipelines
    • Security gates
  • 05

    Data modernisation

    Databases moved with replication that keeps old and new in step, then tuned for the cloud services they run on.

    • Replication strategy
    • Performance tuning
  • 06

    Monitoring and SRE

    Dashboards, tracing, SLOs and runbooks, so you can see how the new platform is running from the first day.

    • SLO dashboards
    • Runbooks and alerts

Our approach

What usually goes wrong,
and what we do instead

  1. The usual way

    Identity, networking, logging and security rules are added after workloads have already moved.

    How we do it

    We build the landing zone first, with network segmentation, IAM, central logging and baseline policies, before any workload moves.

  2. The usual way

    Production is switched over without a rehearsal or a rollback plan, so downtime is likely.

    How we do it

    Workloads move in small waves. Each cut-over is rehearsed, checked against agreed tests and has a rollback plan.

  3. The usual way

    After go-live there are no SLOs, dashboards or runbooks, only tickets.

    How we do it

    Pipelines, security scans, SLO dashboards and runbooks are ready at go-live, so your team can support the new platform.

Architecture

How it's
put together

Each layer has a clear job, so the system is easier to secure, test and extend.

  1. Layer 01

    Discovery and dependency map

    A review of every system, scored for risk and grouped into waves by how much the business depends on it.

    • Dependency graph
    • Wave sequencing
    • RTO / RPO
  2. Layer 02

    Landing zone and network

    Identity, network segmentation, logging and baseline controls, set up before the first workload arrives.

    • IAM baselines
    • Network segmentation
    • Central logging
    • VPC / VNet
  3. Layer 03

    Cut-over and validation

    Cut-overs are rehearsed first, checked against acceptance tests and backed by a rollback plan.

    • Rehearsal runs
    • Rollback strategy
    • Acceptance gates
    • Blue/green
  4. Layer 04

    Monitoring and SRE

    SLO dashboards, tracing, alerts and runbooks that show how each migrated service is performing.

    • SLO dashboards
    • Tracing and logs
    • Runbooks and alerts

How we deliver

From first review
to live in production

4 phases, each ending with an output you can review.

  1. Step 1: Discovery and risk model

    We map your systems, their dependencies and how much downtime or data loss each can tolerate (RTO and RPO), then pick a route for each.

    Output: Modernisation plan

  2. Step 2: Landing zone and baselines

    We set up identity, networking, logging and policy baselines in the target cloud.

    Output: Cloud foundation ready

  3. Step 3: Migration waves and cut-overs

    We move workloads in waves. Each one is rehearsed, tested against agreed checks and has a rollback plan.

    Output: Workloads running in the cloud

  4. Step 4: Operate and optimise

    We hand over SLO dashboards, alerts and runbooks, and keep security checks running in the pipelines after the move.

    Output: Measurable cloud operations

Your team

Who works
on it

Specialists join your squad for this work, alongside a delivery lead who keeps you updated.

  • Modernisation architect

    Plans the migration: dependencies, wave order, data flows and how each cut-over will run.

    • Portfolio
    • Wave planning
    • Cut-over
  • DevSecOps lead

    Adds automated policy checks, security scans and deployment controls to the pipelines in every environment.

    • Pipelines
    • Policy
    • Security gates
  • Cloud platform engineer

    Builds the landing zone, networks and IAM baselines, all as infrastructure code.

    • Landing zones
    • IaC
    • Networking
  • SRE and monitoring lead

    Sets up SLO dashboards, tracing, alerts and runbooks, so day-to-day support stays calm.

    • SLOs
    • Tracing
    • Runbooks

Trust and control

Safe by design,
not by policy alone

  • Validation gates and rollback

    Every cut-over is rehearsed, checked against acceptance tests and has a written rollback plan.

  • Policy as code

    Security scans, compliance checks and drift detection run automatically in the pipelines.

  • Activity records and monitoring

    Logs, traces and dashboards mapped to SLOs, so you can measure how the platform is running.

You keep full ownership of the code, configuration and documentation we create, with no vendor lock-in.

Tools and standards

We pick what fits your product and team, not the other way round.

Migration approaches
  • Rehost
  • Replatform
  • Refactor
  • Blue/green cut-overs
Cloud foundation
  • Landing zones
  • IAM
  • VPC / VNet
  • Infrastructure as code
  • CI/CD
Observability
  • SLOs
  • Distributed tracing
  • Centralised logging

Results

Related
case studies

More case studies
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    We moved a global core banking system from an ageing mainframe to AWS one function at a time, keeping both ledgers in sync throughout. Operating costs fell 60%, releases became 5x faster, and there was zero service downtime.

    Lower operating costs
    60%
    Faster releases
    5x
  • HospitalitySaaS & Software

    Hotel system integrations: 85% faster API responses

    We wrapped a hotel group's ageing PMS in a modern API layer with caching and live sync, so new guest features no longer need risky changes to the core system. It runs at 99.99% availability, with 45ms API responses.

    System availability
    99.99%
    API response time
    45ms
  • HospitalityCloud & DevOps

    Hotel network security: Suspicious devices isolated automatically

    We built AI network security for a global resort chain. It learns how devices normally behave on guest Wi-Fi and isolates suspicious ones automatically. It neutralised 99.9% of threats and detected them 2.5x faster.

    Threats neutralised
    99.9%
    Faster detection
    2.5x
  • FinTechCloud & DevOps

    Fund manager access: Zero-trust controls in place of a broad VPN

    We replaced a fund manager's broad VPN access with zero-trust controls that check the user, device and location, and grant privileged access only when it is needed. They cover 100% of identities and cut lateral-movement risk by 99%.

    Identity coverage
    100%
    Less lateral-movement risk
    99%

FAQ

Straight
answers

Have a different question? Ask it on a 30-minute call.

Book a call

It depends on how many systems you have, how tightly they are linked and how much refactoring each one needs. Discovery produces a wave plan that sets the order and scope of each move, based on risk and business impact. A scoped project can kick off in 1–2 weeks, starting with that discovery.

Planning something like this?

Tell us what you need. We'll suggest the right team and a rough quote range, and an NDA is available before you share anything sensitive.