How Vervali Load Tests Shopify Stores Before Black Friday
How Vervali load tests Shopify and Shopify Plus stores before Black Friday: the Shopify rules, what gets tested, when to start and what it costs.
Legacy Software Modernization
Services
Vervali assesses, re-platforms and migrates data with regression testing, so you can see the old and new systems behave the same before you switch. Parallel run, data reconciliation and a rehearsed rollback sit in the quote.
150+ clients
450+ projects
275+ engineers
15+ years
ISO/IEC 17025:2017Accredited testing laboratory
CMMI Maturity Level 3The process is written down and repeats
ISO 9001:2015Quality management
ISO/IEC 27001Information security
What We Modernize
Systems that still run the business, moved without stopping it.
Assessment Before Anyone Moves
What the current system does, who still knows it, and what it costs to keep. The assessment decides the approach before any code or data moves.
Core Platforms and ERP
Lending, sales-operations and ERP platforms that carry daily transactions. Newer ERP builds are scoped on ERP and CRM development.
Data Migration
Field mapping, what moves, what is archived and a reconciliation report that proves the data arrived intact.
Integrations and Interfaces
The feeds, files and APIs other systems depend on, mapped and rebuilt so nothing downstream breaks on cutover day.
Move to Cloud
When the target is cloud, the move is scoped with cloud migration and modernisation.
Regression Testing
Old and new systems run against the same inputs, with the differences reviewed before you sign off the switch.
Find out what modernizing your system will take, and what it will cost.
Get My Free Scoping SessionRehost, Re-Platform, Refactor or Rebuild
Four approaches, chosen by the assessment and not by a vendor preference.
Rehost
Move the system as it is to new infrastructure. The fastest and lowest-risk move, and the code stays as it was.
Re-Platform
Move to a new platform or database with small changes, so the system gains support without a rewrite.
Refactor
Restructure the existing code in stages, so it can be maintained and extended while it stays live.
Rebuild
Replace the system with a new build when the old one cannot be saved. The most work, and the biggest change.
Proving Old and New Agree
Four checks that run before the switch, so cutover is a decision and not a hope.
Parallel Run
Old and new systems run side by side on real work for the window the quote names.
Data Reconciliation
Record counts, totals and key fields compared between source and target, with every difference explained.
Regression Comparison
The same inputs through both systems, with outputs compared line by line.
Rehearsed Rollback
The path back is practised before cutover and timed, so a bad switch is an hour and not a crisis.
Proof From Delivery
Core platforms that still ran the business while they changed.
Two private-sector banks · lending platforms
60% faster loan processing and 50% less agent onboarding time, with the compliance the engagement required. Platforms like that do not move in one weekend: assessment, a sequence, data that still balances and a timed rollback are how a core that runs the business is allowed to change.
60% faster loan processing50% less agent onboarding timeManufacturer · sales-operations platform
40% less manual stock reconciliation on a sales-operations platform. That is what changes when the old record and the new process finally agree. A cutover without that reconciliation is how month-end becomes a war room.
40% less manual stock reconciliationHow a Modernization Runs
An assessment first, a sequence you can follow and support after the switch.
Assessment
A free look at one system: what it does, what depends on it and what it costs to keep.
Approach and Quote
The approach, the data volume and the parallel-run window named up front, then a price for that stage.
Migrate and Compare
Build and move in stages, comparing old and new at each one, until the differences are explained.
Cutover and Support
A rehearsed cutover, then a named support line while the old system is retired.
Why Teams Choose Vervali for Modernization
One accountable team that builds the new system and proves it matches the old.
Build and Test Together
Developers backed by an ISO/IEC 17025 accredited lab and CMMI Level 3 process, so the system that goes live is the one that was compared.
The Full Programme When You Need It
Estate-wide programmes, vendor lock-in and compliance after the move are covered on legacy system modernization and migration.
Hours That Overlap
Working hours overlap 9am to 1pm Eastern for stand-ups, blockers and cutover calls, with delivery from India.
Frequently Asked Questions
Legacy software modernization updates a system that still runs the business but is hard to maintain, extend or secure. It covers an assessment of what the system does, a move to a new platform or a rebuild, and migration of the data. The old and new systems are compared on the same inputs before you switch. Cutover happens with a rehearsed rollback in place.
It should not. The old system keeps running while the new one is built, and the two run in parallel on real work before cutover. Data is reconciled between them, and the switch is rehearsed with a timed rollback. The quote names the parallel-run window and the cutover time, so your team knows when and how long any change will be.
Yes. We assess the ERP, map its data and integrations, then re-platform, refactor or rebuild as the assessment recommends. Financial totals and key records are reconciled between the old and new systems before you sign off. A new ERP or CRM build is scoped separately, and the quote lists every system that connects to the ERP.
We look at what each system does, what depends on it, how often it fails, how scarce the skills to maintain it are, and what it costs to keep. The result ranks your systems and names the approach for the first one. A free assessment of a single system is the usual starting point, before any larger programme is quoted.
It follows the size of the system, how much data moves, whether the approach is rehost or rebuild, and how long the parallel run must last before you will sign. We do not publish a fixed week count, because the honest answer depends on those four things. The written quote after the assessment names the weeks.
Yes, when the assessment shows it is the right move. Mainframe workloads can be rehosted, re-platformed or rebuilt for cloud, and the data is reconciled against the source. Some batch jobs and interfaces need redesign rather than a straight move. The quote states which parts move as they are and which are rebuilt.
Lower maintenance effort, less dependence on scarce skills, fewer blocked integrations and a smaller unpatched security exposure. A modernized system is also easier to extend with new features. We do not promise a savings percentage, because it depends on your estate. The assessment sets out what keeping the old system costs you today.
Price follows the approach, the data volume, the parallel-run window and the test pack. Clutch lists Vervali at $25 to $49 per hour. We quote after a modernization review or a free assessment of one system, not as a published project total. A project is fixed price, and tool licences and data are named in the estimate.
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