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.
Custom API Development Services,
Tested Before Launch
Vervali designs and builds REST and GraphQL APIs and the integrations behind them: ERP, payment, identity and CRM connections, versioning and documentation, authentication and rate limiting. Every API ships with contract tests, security tests and load tests written by our own QA team, so the integration your customer depends on is proven before it goes live.
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 Build
REST and GraphQL APIs, the integration layers between systems that were never designed to talk, and the back ends behind mobile and web products.
REST and GraphQL
The interfaces your products actually call. SOAP is added to the quote when you name it. Proof is on API testing services.
Integration Layers
ERP, payment, identity and CRM connections. The failure is almost always a field mapping, an idempotency gap or a retry that duplicates a transaction.
Back Ends Behind Products
Versioning, documentation, authentication and rate limiting come with the delivery, not as an upgrade. Product builds are on custom software development.
Need an API that ships with contract and security tests, not another undocumented endpoint?
Free API ReviewWhat Ships With the API
The difference between an API that lasts and one that gets rebuilt in two years.
Documentation That Matches
OpenAPI or a Postman collection, matching the implementation. A document that drifted from the code is a finding.
Contract Tests
A change that breaks a consumer fails the build rather than production. Layer-only work is on functional API testing.
Versioning and Deprecation
A versioning policy and a deprecation path with notice periods, written down before the first consumer.
Authentication and Rate Limits
Auth, rate limiting and quota behaviour in the build. Object-level authorisation is the finding most often missed. See API security testing.
Monitoring Hooks
Latency, errors and the quota a consumer actually hits. A build with no hook is a build you cannot operate.
Load Tests
Written by the same QA team and run against the build before launch.
REST or GraphQL, and How to Choose
We help you choose. We do not sell GraphQL as a default because it is newer.
REST
Resources, status codes and caching that operators already understand. The right default when many teams call you and need a contract they can read without a query language.
GraphQL
The client asks for the shape it needs, moving complexity to the server and caching. The right buy when mobile clients pay for round trips they cannot afford.
Know the systems that must talk? A QA lead and an architect can scope it.
Book a CallThe Integration Surface
Named connections rather than a claim. Full ERP suites are on ERP and CRM development.
ERP and Finance
Orders, stock and the posting that has to happen once. A retry that creates a second invoice is the finding.
Payments
Authorise, capture, refund and the webhook that never arrives. Idempotency is the control. We test controls on compliance testing and do not issue a PCI certificate.
Identity and SSO
Tokens, roles and the account a second user should not see. Object-level access is the case.
CRM
Lead, contact and the field that two systems spell differently. Mapping is the work.
Logistics
Status events, duplicates and the scan that arrives twice. A retry without an idempotency key ships the same carton twice on paper.
Messaging
Push, email and the template that still has last week's amount. Delivery is not the same as the payload being right.
Security by Default
Built in rather than added.
Access and Validation
Authentication and authorisation at object level, and input validation.
Limits, Secrets and Logging
Rate limiting, secrets handling and logging that does not leak. OAuth and JWT are added to the quote when you already run them.
Tested Against OWASP
The OWASP API Top 10 on agreed in-scope endpoints, on API security testing. We do not claim certified security staff or issue certificates.
Proof From Delivery
The API and integration layers of ERP, banking and fintech engagements, described by sector. They were not API-only jobs.
India · two leading private-sector banks
Loan processing and onboarding depended on the integrations behind the screens. After: 60% faster loan processing, 50% less agent onboarding time, and 100% compliance on the controls named in that work. Identity and payment APIs were part of that estate.
60% faster loan processing 50% less agent onboarding timeIndia · manufacturer · sales-operations platform
40% less manual stock reconciliation when the old record and the new process finally agreed. Field mapping and a retry that must not duplicate a posting are the API work.
40% less manual stock reconciliationUAE · SME finance platform
Automation on repeatable finance journeys, including the APIs those journeys call. After: 40% less testing time, and 98% user satisfaction. Identity and payment integrations stay unnamed.
40% less testing time 98% user satisfactionHow an Engagement Starts
From the systems that will not talk to an API that is proven before launch.
-
01
Share the Systems
Tell us the systems that must talk, the consumers and any existing API, with access under NDA.
-
02
Get the Design
REST or GraphQL, the integration surface, versioning and the tests that ship with the build, agreed before work starts.
-
03
Start With an API Review
A free review of one existing API is the first look. Most engagements land at $25 to $49 an hour blended, and price follows consumers, integrations and tests.
-
04
Ship and Operate
The API goes live with contract, security and load tests passing and monitoring hooks in place, 9am to 1pm Eastern with delivery from India.
Frequently Asked Questions
Designing and building REST and GraphQL APIs and the integrations behind them: ERP, payment, identity and CRM connections, versioning, documentation, authentication and rate limiting. Every API ships with contract, security and load tests written by our own QA team. Method is on API testing services.
REST and GraphQL are the defaults, along with integration layers between systems that were never designed to talk and the back ends behind mobile and web products. SOAP is added to the quote when you name it. Custom software around those APIs is on custom software development.
REST when many teams will call you and need a contract they can cache and read without a query language. GraphQL when mobile clients are paying for round trips they cannot afford. GraphQL moves complexity to the server and caching rather than removing it. We help you choose, not default to the newer option.
Yes. Contract, security and load tests, written by our own QA team, ship with the API. Method is on API testing services, with functional API testing and API security testing available as separate layers. A free review of one existing API is the first look.
A versioning policy and a deprecation path with notice periods are written down before the first consumer and ship with the build. An experienced integration buyer uses this question to judge whether a vendor has done it before. A silent break is a fail, so deprecation is announced, dated and tested.
Authentication and authorisation at object level, input validation, rate limiting, secrets handling and logging that does not leak, all built in rather than added. OAuth and JWT are added to the quote when you already run them. Testing, including the OWASP API Top 10, is on API security testing.
Yes, on the systems you name: ERP and finance, payments, identity, CRM, logistics and messaging. The failure is almost always a field mapping, an idempotency gap or a retry that duplicates a transaction. Full ERP suites are on ERP and CRM development.
Most engagements land at $25 to $49 an hour blended. Price follows the number of consumers, the integrations you named, and whether contract, security and load tests sit in the same build. A free review of one existing API shows the surface before anyone writes a quote.
Email Us
Call Us
