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Web DevelopmentPopular8–16 weeks

Web Application Development

Secure, fast browser-based apps for you and the people you serve.

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Starting price
Starting at
$7,499
8–16 weeksTypical timeline
30%Deposit to commence
6Defined deliverables
Fixed architecture before build Written change-order process Full IP transfer on final payment 90-day conformance warranty
Overview

What this engagement is

Web applications are where most everyday software now lives — personal tools, client portals, dashboards. Cyntra builds them with the discipline usually reserved for product engineering: typed codebases, real test coverage, measured performance budgets and an authentication layer that survives a security review.

Problems this solves

  • Your own tool held together in a spreadsheet or an old desktop database
  • Customers or clients emailing you for updates a portal could answer
  • An existing web app that is slow, fragile or impossible to change safely
  • Nothing that works properly on your phone when you are away from your desk
  • Access to your data handled informally rather than enforced in code

What is included

Information architecture and user-flow design
Component-driven UI implementation with a design system
Secure authentication, sessions and role permissions
REST or GraphQL API layer with validation
Performance budget enforcement and Core Web Vitals tuning
Automated accessibility checks (WCAG 2.2 AA)
Staging environment and release pipeline

Deliverables

01Production web application with responsive UI
02Reusable component library
03API documentation and Postman collection
04Automated end-to-end test suite
05Performance and accessibility audit reports
06Deployment pipeline and environment documentation

How we run it

1Requirement and user-role definition
2Wireframes and interaction design
3API and data contract agreement
4Iterative build with demo checkpoints
5Cross-browser QA and accessibility pass
6Security review and launch

Security considerations

  • Session hardening, CSRF and rate-limit protection
  • Server-side authorisation on every data path
  • Input validation with schema enforcement
  • Security headers and content security policy

Optional add-ons

Add-onPrice
Offline / PWA capability$2,199
Real-time collaboration features$3,499
White-label multi-tenant support$3,899

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

Questions about this service

Will it work on mobile?
Yes. Every application is built mobile-first and tested on real device viewports, not just resized desktop browsers.
Can it integrate with our existing systems?
Yes. Integration scope is defined during discovery — we work with REST, GraphQL, SOAP, SFTP file exchange and database-level replication where an API does not exist.
Related packages

Fixed-price options covering this work

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

Popular
Website and Web Development

Business Website Package

A credible, fast five-to-eight page website for you or your solo venture, with enquiry flows.

$1,999
4–5 weeks 2 revisions 30 days support
  • Up to 8 pages (Home, About, Services overview, 2 service pages, Case studies, Contact, 1 policy set)
  • Premium custom design — no templates
  • Fully responsive, accessible (WCAG 2.2 AA) build
  • Contact and quote forms with email notification
  • +5 further deliverables

Recommended for: Individuals, freelancers and people starting their own venture who need a professional web presence

Buy PackageDetails
Website and Web Development

B2C Website Redesign Package

Rebuild your site without losing rankings — audit, migration and performance included.

$4,499
8–10 weeks 3 revisions 60 days support
  • Full audit: SEO, performance, content and analytics baseline
  • Redesign strategy with measurable targets
  • New design system and up to 20 page templates
  • Content migration with complete redirect mapping
  • +5 further deliverables

Recommended for: Individuals and solo ventures with dated sites that cannot risk losing search traffic

Buy PackageDetails
Website and Web Development

Ecommerce Development Package

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

Starting at
$4,999
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
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
Subscribe
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

Web Application Development
From $7,499
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