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Software Development2–5 weeks

Payment Gateway Integration

Secure payment flows for your venture: checkout, subscriptions, invoicing and payouts.

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Starting price
Starting at
$4,900
2–5 weeksTypical timeline
50%Deposit to commence
5Defined deliverables
Fixed architecture before build Written change-order process Full IP transfer on final payment 90-day conformance warranty
Overview

What this engagement is

Payments touch revenue, compliance and customer trust simultaneously. Cyntra implements payment flows with webhook-driven state, idempotency and reconciliation — the parts that stop silent revenue loss.

Problems this solves

  • Chasing bank transfers and invoices by hand
  • Failed payments with no retry process
  • Subscription status drifting from your payment provider
  • Uncertainty about card-payment compliance
  • No reconciliation between payments and your records

What is included

Payment provider selection and account configuration
Checkout or embedded payment implementation
Subscription plans, trials, proration and dunning
Webhook handling with signature verification and idempotency
Invoice and receipt generation
Refund, dispute and chargeback workflows
Reconciliation reporting to your accounting system

Deliverables

01Production payment integration
02Webhook processing with replay safety
03Automated invoice and receipt generation
04Refund and dispute runbook
05Reconciliation reports

How we run it

1Payment flow and compliance scoping
2Provider configuration and test-mode build
3Webhook and reconciliation implementation
4Test-card and failure-path validation
5Live-mode launch with monitoring

Security considerations

  • Card data never touches your infrastructure
  • Webhook signature verification on every event
  • Idempotent processing to prevent duplicate charges
  • Secrets held server-side only, never in client code

Optional add-ons

Add-onPrice
Multi-currency support$3,200
Split payments / marketplace payouts$6,400
Accounting system sync$3,800

Add-ons are quoted alongside the base engagement and confirmed in your proposal before work begins.

Questions about this service

Are we PCI compliant with this approach?
Using hosted or embedded provider elements keeps you in the lowest-scope SAQ-A category, since card data goes directly to the processor and never reaches your servers.
Related packages

Fixed-price options covering this work

Where scope can be defined precisely upfront, these packages remove the need for a discovery engagement.

Website and Web Development

Ecommerce Development Package

A complete online store for your venture with payments, shipping and inventory sync.

Starting at
$7,500
10–14 weeks 3 revisions 60 days support
  • Catalog architecture supporting variants and bundles
  • Custom storefront design and build
  • Optimised checkout with abandoned-cart recovery
  • Stripe payment integration with multiple methods
  • +6 further deliverables

Recommended for: People starting or growing their own online shop who need more than a basic storefront

Buy PackageDetails
Recommended
Software Development

SaaS MVP Development Package

A launch-ready multi-tenant SaaS for your idea, with billing, auth, onboarding and analytics.

Starting at
$12,000
10–16 weeks 3 revisions 90 days support
  • Product scoping to a defensible v1 feature set
  • Multi-tenant architecture with verified data isolation
  • Authentication, workspaces, roles and invitations
  • Stripe subscription billing with plans, trials and dunning
  • +6 further deliverables

Recommended for: Solo founders and individuals launching their own software product

Buy PackageDetails
Advanced
Software Development

Mobile App MVP Package

iOS and Android apps published, with shared backend and release pipeline.

Starting at
$15,000
14–20 weeks 3 revisions 90 days support
  • Platform strategy with documented rationale
  • UX design against platform interaction guidelines
  • iOS and Android applications published to both stores
  • Shared backend API with documentation
  • +6 further deliverables

Recommended for: Individuals and solo founders bringing an app idea to customers

Buy PackageDetails
Related software

Platforms that may remove the need to build

Before a custom build, check whether one of our deployable platforms already covers 80% of your requirement.

LMS Platforms

Cyntra LMS Platform

Course delivery with assessment integrity

Learning platform for instructors and creators, with cohorts, assessments and certification.

CoursesCohortsVideo DeliveryAssessments+3 modules
$329/ month
Setup
10–20 business days
Subscribe
Recommended
Billing Systems

Cyntra Billing Suite

Invoicing, subscriptions and collections that run themselves

Automated invoicing, subscription billing, failed-payment follow-up and reconciliation for freelancers and creators.

InvoicingSubscriptionsPaymentsDunning+3 modules
$299/ month
Setup
7–14 business days
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Popular
Booking Systems

Cyntra Booking Engine

Appointment and resource scheduling with real capacity rules

Self-service booking for independent professionals, with capacity rules and automated reminders.

AvailabilityResourcesBookingsReminders+3 modules
$249/ month
Setup
5–12 business days
Subscribe
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Cyntra Technologies LLC · 212 N 2nd St, Ste 100, Richmond, KY 40475

Payment Gateway Integration
From $4,900
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