sjainTECH

Service

Digital Transformation

Modernise the estate without stopping the business.

Legacy ModernizationCloud MigrationDigital WorkplaceProcess Digitization
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Executive summary

What this practice is for.

Transformation programmes fail when they are planned as one large event. The estate keeps running, the business keeps changing, and the big-bang date slips until the sponsor leaves.

We modernise incrementally: strangle the legacy system, migrate a workload at a time, prove value at each step and keep the lights on throughout.

Every increment is reversible, measurable and independently valuable.

Business challenges

What we are usually called in to fix.

Legacy systems nobody can change

Business rules are locked inside code written by people who have left.

Paper-bound processes

Physical forms and wet signatures dictate the speed of the organisation.

Integration spaghetti

Point-to-point interfaces make every change a multi-team negotiation.

Change fatigue

Previous programmes over-promised, so the organisation resists the next one.

Why traditional approaches fail

  • Lift-and-shift moves the problem to a more expensive location.
  • Big-bang cutovers concentrate all risk on one weekend.
  • Technology change is delivered without process or role redesign, so behaviour never shifts.
  • Benefits are claimed at business-case stage and never measured afterwards.

Methodology

The SJAIN method.

Six stages, each with defined inputs, outputs and owners.

  1. Step 01

    Assess

    Application portfolio analysis: business value, technical health, run cost and risk.

  2. Step 02

    Plan

    Sequence workloads into waves with clear value and dependency management.

  3. Step 03

    Modernise

    Re-platform, re-architect or replace by workload, using the strangler pattern.

  4. Step 04

    Integrate

    Introduce an integration layer so systems stop depending on each other's internals.

  5. Step 05

    Adopt

    Redesign roles, train users and retire the old path deliberately.

  6. Step 06

    Measure

    Track run cost, cycle time and incident rate against the baseline.

Scope of services

What is included

  • Application portfolio assessment
  • Modernisation roadmap and business case
  • Legacy re-platforming and re-architecture
  • Cloud migration waves
  • Enterprise integration and API layer
  • Process digitisation and paperless workflows
  • Digital workplace enablement
  • Benefit measurement

Deliverables

What you receive

  • Portfolio assessment and disposition per application
  • Wave plan with dependencies and rollback
  • Migrated and modernised workloads
  • Integration platform and API catalogue
  • Adoption and benefits dashboard

Architecture overview

How it is built.

  1. 01

    Strangler facade routing traffic between legacy and modern implementations.

  2. 02

    API gateway and integration layer decoupling producers from consumers.

  3. 03

    Canonical data contracts per domain with versioning.

  4. 04

    Dual-run and reconciliation during migration windows.

  5. 05

    Landing zone with policy, identity and cost guardrails.

Implementation process

  • Weeks 1–4

    Assessment, disposition and wave planning.

  • Quarter 1

    Landing zone, integration layer and first migration wave.

  • Quarters 2–4

    Successive waves, legacy retirement and benefit realisation.

Security & compliance

  • Security and compliance baked into the landing zone
  • Data classification before any workload moves
  • Zero-downtime cutover patterns with tested rollback
  • Formal decommissioning with data retention compliance

Benefits & ROI

The numbers this practice moves.

0–40%

Reduction in infrastructure run cost

0x

Faster release cadence post-modernisation

Zero

Planned business downtime during cutover

Frequently asked questions

The first valuable increment lands within a quarter. Full portfolio programmes typically run 12–24 months in waves.

Yes. We frequently operate as the architecture and engineering partner while incumbents continue to run existing services.

Related case study

Citizen services portal and case digitisation

Statutory case turnaround cut from days to hours

Read the case study

Downloadable guide

Digital Transformation capability guide

A practical guide covering methodology, architecture patterns, deliverables and typical commercial models.

Request the guide

Not sure where this practice
fits your roadmap?

We start with a discovery workshop: current state, constraints, the highest-value first slice and what it costs to prove it.

Book a discovery workshop