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Migration & modernization workbench

Migrate legacy code at scale.Without losing control of it.

Shift turns your modernization backlog into governed runs: it plans the change, waits for an engineer to approve that plan, executes in an isolated worktree, and hands back a reviewable diff and a security scan, all on your own machines.

Book a 20-minute demoSee a run, end to end

Desktop app for macOS & Windows

Industries we support

  • Travel & Hospitality

    Guest-facing systems that have to keep taking bookings while their code is modernized underneath.

    • Reservations
    • Property management
    • Loyalty
    • Distribution

  • Banking

    Systems where every change has to stand up to audit, modernized one approved run at a time.

    • Payments
    • Lending
    • Digital channels
    • Back office
See every workstream

Built for the stacks your roadmap keeps deferring

  • COBOL
  • Oracle Forms
  • Java EE / JBoss
  • Struts
  • Spring Boot 2.x
  • .NET Framework
  • AngularJS
  • jQuery
  • PL/SQL
  • Webpack
  • Kony
  • Salesforce

The problem

Modernization is not a skills problem. It is a throughput problem.

Every engineering org of a certain age carries the same backlog. Your team knows exactly how to do the work. There has never been a quarter with enough capacity to actually do it.

01

It never gets scheduled

The javax to jakarta upgrade, the AngularJS rewrite, the Oracle Forms port. Too large to fit in a sprint, too unglamorous to win a roadmap fight. So it moves to next quarter, again.

02

It is repetitive, not hard

Hundreds of near-identical edits across hundreds of files. The work is mechanical at heart, which is exactly why it burns senior engineers who should be shipping product.

03

AI tools stop at the editor

A copilot helps one engineer type faster in one file. Nobody has solved the workflow around a six-hundred-file change: who approved it, what ran, what changed, and how you would prove any of it later.

04

So nobody will sign it off

Change control wants a plan, a named approver, an isolated execution, a diff and an audit trail. Ungoverned AI output clears none of those bars, so the work stays exactly where it was.

Shift exists for that gap: the change is mechanical enough to automate, and consequential enough that it has to be governed.

The product

One run, end to end.

A run is the unit of work. It starts as a sentence, passes a human gate, executes in isolation, and finishes as a diff your reviewer can approve like any other pull request.

Every migration in one workspace

The workbench is the home screen: every run across every connected repository, what is queued, what is running and what failed. Start a new one from three modes, or reopen a past run and branch it.

  • Migration, modernization and greenfield modes
  • Recent runs across every connected repository
  • Status, mode and elapsed time at a glance

shift / workbench

Workbench

Good morning.

5 runs · 0 currently running.

Migration

Move between stacks or versions.

Modernization

Refactor without behavior change.

Greenfield

Generate a new project.

Recent runs

  • Webpack → Vite in billing-dashboard

    run_queued

    acme/billing-dashboard

    MIGRATION · WEBPACK → VITE

    1m ago

  • Scaffold usage-metering service

    run_gre01

    (new repo)

    GREENFIELD · NEW SERVICE

    4m ago

  • Bump Spring Boot 2.7 → 3.3 in billing-web

    run_mod01

    acme/billing-web

    MODERNIZATION · SPRING BOOT 2 → 3

    19m ago

  • Migrate Express 4 → Fastify 4 in payments-service

    run_mig01

    acme/payments-service

    MIGRATION · EXPRESS → FASTIFY

    47m ago

  • Convert legacy-jboss to Spring Boot 3

    run_failed

    acme/legacy-jboss

    MODERNIZATION · JBOSS → SPRING

    5h ago

Stage 1 of 6

How it works

Five gates. Nothing merges unreviewed.

Every run is a governed workflow, not a prompt. The engineer approves the plan before any code is written, and reviews the diff before anything merges.

  1. Step 1: Plan

    Shift proposes an executable plan with target files, risks and rollback notes. No code is written yet.

  2. Step 2: Approve

    Your engineer or tech lead approves the plan, or sends it back with notes. This is a hard gate.

  3. Step 3: Execute

    The work runs in an isolated git worktree. Your checkout and branch are untouched.

  4. Step 4: Diff + scan

    A reviewable diff lands together with a security scan. Findings are severity-graded.

  5. Step 5: Merge

    Your engineer merges, with the prompt, plan, diff, logs and scan retained as evidence.

Template library

Start from a migration that is already encoded.

Templates carry the prompt, the constraints and the checks for a known move, so the first run on a new repository is not a blank page. Anything not in the library starts as a plain description instead.

Migration

Move between stacks or versions

  • Express → Fastify
  • JS → TypeScript
  • Webpack → Vite
  • Mocha → Vitest
  • CRA → Vite
  • Pages Router → App Router
  • REST → tRPC

Modernization

Update what stays in place

  • React class → hooks
  • TS strict mode
  • Promises → async/await
  • CommonJS → ESM
  • Spring Boot 2 → 3
  • javax → jakarta
  • Add OpenAPI

Enterprise migrations (Oracle Forms, COBOL adapter layers, Salesforce, Kony, .NET Framework) are delivered as scoped migration templates built with you during the engagement.

Where teams point it

Migrate, modernize, integrate.

The starred items are what enterprise teams are asking for most right now. Everything here is delivered the same way: one contained workflow, plan-gated and reviewable.

Migrate

Move onto a new stack

Salesforce and CRM platform migration

Oracle Forms to a modern web front end

  • Kony, AngularJS and similar framework moves
  • .NET Framework to current .NET
  • On-premise workloads to cloud

Modernize

Update what stays in place

COBOL and mainframe adapter layers

  • Struts and legacy Java EE upgrades
  • PL/SQL and batch-era business logic
  • Version alignment across a merged estate

Integrate

Make it talk to the new world

ISO 20022 message and schema work

Open Finance and open banking APIs

  • Microservices decomposition of a monolith
  • Analytics and reporting platform feeds
  • Partner and third-party interface adapters

Salesforce migration is where most teams start.

Why it clears security review

Built for the questions your CISO will ask first.

These are the three answers that decide whether a modernization tool gets through vendor risk, in any estate where data residency is a regulatory question rather than a preference.

Stays in jurisdiction

Shift runs inside your own environment. Your repository is never uploaded to a vendor cloud, so using it adds no new place your code is stored or processed.

Nothing ungated

No change is written before a human approves the plan, and no change merges before a human reviews the diff. The gate is structural, not a setting that can be turned off.

Evidence by default

Every run retains the prompt, the approved plan, the diff, the logs and a severity-graded security scan. The audit trail is a by-product of how the tool works.

The question we get asked most

“How is this different from the AI coding tools our developers already have?”

Those help one engineer write lines faster inside an editor. This owns the workflow around the change: it plans it, waits for approval, executes it in isolation, and produces the diff, the scan and the evidence. Different problem, and they run alongside each other.

Commercials

How we price it.

Priced per engagement, never off a rate card. Each engagement is scoped to what it actually covers, so the number reflects your estate.

Start

Pilot

Outcome-priced

  • One contained workflow, one repository
  • Four weeks, KPI ranges agreed in Week 0
  • You pay only if the agreed ranges are hit
  • Sized to sit under your procurement threshold
Talk about pilot

Scale

Program

Annual engagement

  • All workflows across a defined engineering org
  • Delivered with Zapcom forward-deployed engineers
  • No charge that grows because you succeeded
Talk about program

Extend

Enterprise

Program plus delivery

  • Shift inside a wider Zapcom program
  • Joint accountability for the delivered outcome
  • On-site presence where the program needs it
  • Commercials built around the program plan
Talk about enterprise

Two things that do not change

You bring your own model account, so you see the usage meter directly and we take no margin on it. And there is no per-developer meter anywhere in the model, because we do not want a price that rises simply because your team got faster.

Start with one workflow.

Four weeks. One repository. KPIs agreed before we begin.

  1. Week 0

    We scope one contained workflow and agree the KPI ranges together, in writing.

  2. Weeks 1 to 3

    Zapcom engineers run the workflow through Shift alongside your team.

  3. Week 4

    We report against the agreed ranges and hand over the full evidence pack.

Next step: 20 minutes on whichever modernization workstream is absorbing the most engineering time right now.

Email the Shift team

or write toZapforge@zapcg.com