Web Development Services USA | Custom Websites & Web Applications

Transform your digital presence with professional web development services engineered for the competitive US market. Big0 delivers world-class websites and web applications serving American businesses from Fortune 500 enterprises to high-growth startups across San Francisco, New York, Austin, Seattle, and beyond. Our US-focused development ensures ADA compliance, optimal performance, and SEO strategies that rank in America's most competitive markets.

We understand the unique demands of the US digital landscape—from ADA Section 508 and WCAG 2.1 accessibility requirements to Google's US search algorithm nuances, from e-commerce payment expectations to the performance standards American users demand. Our web solutions combine cutting-edge technology with regulatory compliance, helping your business succeed online while protecting against accessibility lawsuits and maximizing search visibility.

Why US Companies Choose Big0 for Web Development

ADA & WCAG 2.1 Compliance Expertise Protect your business from accessibility lawsuits while expanding your addressable market. With ADA website lawsuits exceeding 4,000 annually in the US, compliance isn't optional. We build every website to meet ADA Section 508 and WCAG 2.1 Level AA standards from day one, ensuring accessibility for 61 million Americans with disabilities while reducing legal risk.

US Search Engine Optimization Dominate Google search results in competitive US markets. Our SEO-optimized development ensures technical excellence including Core Web Vitals optimization, mobile-first indexing compatibility, structured data for rich snippets, local SEO for US markets, and performance optimization that satisfies Google's US ranking algorithms and American users' expectations.

E-commerce Excellence Build high-converting e-commerce experiences for the $1.1 trillion US online retail market. We integrate with payment gateways Americans trust (Stripe, Square, PayPal, Authorize.net, Apple Pay, Google Pay), optimize for mobile commerce (73% of US e-commerce), and implement conversion strategies proven in the competitive American market.

Enterprise-Grade Performance Deliver the fast, reliable experiences American users expect. Our websites consistently achieve Google PageSpeed scores of 90+, handle enterprise-scale traffic across US regions, and maintain 99.9%+ uptime serving American customers 24/7 from coast to coast.

Comprehensive Web Development Services

Custom Website Development

Corporate Websites Professional corporate websites representing your brand to US stakeholders including investors, partners, customers, and recruits. We create sophisticated designs with seamless user experience, comprehensive content management systems for marketing teams, integration with US business tools (HubSpot, Salesforce, Marketo), and performance optimization ensuring fast load times across American networks.

Landing Pages & Conversion Optimization High-converting landing pages optimized for US paid advertising campaigns (Google Ads, Facebook Ads, LinkedIn Ads). We employ A/B testing frameworks, conversion rate optimization strategies proven in US markets, integration with American marketing automation platforms, and analytics tracking aligned with US business metrics and KPIs.

Marketing Websites Content-rich marketing websites driving organic traffic from US search engines. Our marketing sites include blog platforms with SEO optimization, resource libraries and downloadable content, email capture and lead generation forms, marketing automation integration, and analytics providing insights into American audience behavior and conversion patterns.

Portfolio & Agency Websites Showcase websites highlighting your work for US clients and prospects. We create visually stunning designs with case study presentation, project galleries with filtering, client testimonials and social proof, contact forms and inquiry management, and fast performance despite rich media content.

E-commerce Development

Shopify Plus Development Enterprise Shopify Plus implementation for brands serving US markets. Our Shopify expertise includes custom theme development, headless commerce architecture, multi-channel selling (Amazon, Facebook, Instagram), subscription and recurring billing, wholesale and B2B portals, and integration with US fulfillment networks (ShipStation, ShipBob, Deliverr).

WooCommerce Solutions Flexible WordPress e-commerce using WooCommerce for US retailers. We build custom product catalogs, advanced filtering and search, payment gateway integration (multiple US processors), shipping calculations for US carriers, inventory management, and marketing integrations popular in American retail.

Custom E-commerce Platforms Fully custom e-commerce solutions for unique US market needs. Our custom platforms include proprietary product configuration, complex pricing and discounting logic, multi-vendor marketplace capabilities, subscription and membership systems, wholesale portals with tiered pricing, and integration with enterprise systems (ERP, PIM, OMS).

Headless Commerce Modern headless architecture separating frontend and backend for maximum flexibility. We implement headless solutions using Shopify, BigCommerce, or commercetools as backend, React, Next.js, or Vue.js for frontend, GraphQL APIs for data access, and optimized performance through static generation and CDN distribution across US regions.

Web Application Development

Progressive Web Apps (PWA) App-like web experiences combining web reach with native app capabilities. Our PWAs include offline functionality for unreliable US connections, push notifications for user engagement, home screen installation, fast performance through service workers, and cross-platform compatibility from desktop to mobile serving American users on any device.

SaaS Web Applications Scalable web-based software serving US enterprise and consumer markets. We build multi-tenant architectures, subscription and billing integration, user dashboards and analytics, API integrations with US business tools, and responsive interfaces working across devices American professionals use throughout their workday.

Customer Portals Secure self-service portals reducing support costs for US companies. Our portals include account management and profile editing, order history and tracking, document library access, support ticket systems, knowledge base integration, and single sign-on (SSO) for enterprise clients.

Internal Business Applications Custom web applications streamlining US business operations including workflow automation, approval systems, data visualization dashboards, reporting and analytics, employee directories, and resource management serving American workforces from small teams to enterprise organizations.

Content Management Systems

WordPress Development Enterprise WordPress solutions powering US corporate websites. We provide custom theme development, advanced plugin customization, WooCommerce integration for commerce, membership and subscription systems, multisite networks, and security hardening protecting against threats targeting American businesses.

Headless CMS Implementation Modern headless CMS architectures separating content from presentation. We implement solutions using Contentful, Sanity, Strapi, or Prismic for content management, Next.js, Gatsby, or Nuxt for frontend, API-first architecture, and omnichannel content delivery serving web, mobile, and emerging channels.

Custom CMS Development Proprietary content management tailored to unique US workflow needs. Our custom CMS platforms include role-based permissions, custom content types and taxonomies, workflow and approval processes, version control and content history, and intuitive interfaces for American marketing teams.

ADA Compliance & Web Accessibility

Legal Protection Through Compliance

Accessibility lawsuits targeting US websites have grown exponentially, with plaintiffs' firms systematically targeting non-compliant sites. We protect your business through proactive compliance including WCAG 2.1 Level AA conformance, ADA Section 508 compliance, comprehensive accessibility audits, remediation of existing sites, and ongoing monitoring ensuring continued compliance as your site evolves.

Technical Accessibility Implementation

• Keyboard Navigation: Full site functionality without mouse/trackpad
• Screen Reader Optimization: Proper semantic HTML and ARIA labels
• Color Contrast: Minimum 4.5:1 ratios for all text content
• Alternative Text: Descriptive alt text for all images and media
• Captions & Transcripts: Video and audio accessibility
• Form Accessibility: Proper labels, error messages, validation
• Focus Indicators: Clear visual indicators for keyboard navigation
• Responsive Text: Text resizing without horizontal scrolling

Accessibility Testing & Certification

Comprehensive testing ensuring real-world accessibility for Americans with disabilities including automated scanning with enterprise tools, manual testing by accessibility experts, screen reader testing (JAWS, NVDA, VoiceOver), keyboard-only navigation testing, color blindness simulation, and optional third-party certification providing legal defensibility.

Search Engine Optimization (SEO)

Technical SEO Excellence

Foundation for search visibility in competitive US markets: - Core Web Vitals Optimization: Meeting Google's performance thresholds - Mobile-First Indexing: Optimized for how Google crawls sites - Structured Data: Schema.org markup for rich search results - XML Sitemaps: Proper indexing of all important pages - Robots.txt & Meta Tags: Proper crawling directives - Canonical URLs: Avoiding duplicate content penalties - SSL/HTTPS: Security expected by Google and users - Page Speed: Sub-3 second load times across US regions

On-Page SEO Optimization

Content and page-level optimization for US search terms: - Keyword Research: Targeting terms Americans actually search - Title Tags & Meta Descriptions: Optimized for US search results - Header Hierarchy: Proper H1-H6 structure - Internal Linking: Strategic linking architecture - Image Optimization: Alt text and file size optimization - Content Optimization: SEO-friendly content structure - URL Structure: Clean, descriptive URLs

Local SEO for US Markets

Visibility in local US searches critical for businesses with physical presence: - Google Business Profile: Optimization and management - Local Citations: Consistency across US directories - NAP Consistency: Name, address, phone standardization - Local Content: City and region-specific pages - Location Schema: Structured data for local businesses - Review Management: Google and US review platforms

Web Performance & Optimization

Speed Optimization

American users expect fast websites—53% abandon sites taking over 3 seconds to load: - Image Optimization: WebP/AVIF formats, responsive images, lazy loading - Code Minification: HTML, CSS, JavaScript compression - CDN Distribution: Content delivery across US regions - Caching Strategy: Browser and server caching - Critical CSS: Inline critical styles for faster rendering - JavaScript Optimization: Code splitting, async loading - Database Optimization: Query optimization, caching layers

Core Web Vitals Excellence

Meeting Google's quality thresholds affecting US search rankings: - Largest Contentful Paint (LCP): Under 2.5 seconds - First Input Delay (FID): Under 100 milliseconds - Cumulative Layout Shift (CLS): Under 0.1 score - First Contentful Paint (FCP): Under 1.8 seconds - Time to Interactive (TTI): Under 3.8 seconds

Multi-Region Performance

Optimized delivery across diverse US geography from New York to San Francisco: - CDN Edge Locations: Serving content from nearest US locations - Geographic Load Balancing: Routing to optimal servers - Regional Testing: Performance verification across US regions - Mobile Network Optimization: 4G/5G performance on US carriers

Payment Integration for US Market

Major Payment Processors

Comprehensive integration with payment methods Americans trust:

Stripe Integration Most popular choice for US online businesses, offering credit/debit cards, ACH direct debit, Apple Pay, Google Pay, buy now pay later (Affirm, Klarna, Afterpay), subscription billing, and fraud detection optimized for US transaction patterns.

Square Integration Unified commerce connecting online and in-store for US retailers including online payments, point-of-sale integration, inventory synchronization, customer data unification, and integrated reporting across all channels.

PayPal & Venmo Trusted by 200+ million Americans including PayPal checkout, Venmo payments (popular with younger Americans), Pay in 4 installments, and buyer/seller protection increasing conversion through trust.

Authorize.net Established payment gateway for US merchants including credit card processing, e-check acceptance, fraud detection suite, recurring billing, and compatibility with US merchant accounts.

Payment Security & Compliance

• PCI DSS Compliance: Level 1 service providers
• Tokenization: Secure card data handling
• 3D Secure: Additional fraud protection
• SSL Encryption: Secure data transmission
• Fraud Detection: AI-powered fraud prevention
• Chargeback Protection: Dispute management tools

Technology Stack

Frontend Technologies

• Frameworks: React, Next.js, Vue.js, Nuxt, Angular
• Styling: Tailwind CSS, Styled Components, Sass/SCSS
• Build Tools: Webpack, Vite, Parcel
• Performance: Web Vitals optimization, lazy loading, code splitting

Backend Technologies

• Languages: Node.js, Python, PHP, Ruby, .NET
• Frameworks: Express, Django, Laravel, Rails, ASP.NET Core
• APIs: RESTful, GraphQL, WebSockets
• Authentication: OAuth, JWT, SSO integration

E-commerce Platforms

• Enterprise: Shopify Plus, BigCommerce Enterprise, Adobe Commerce
• SMB: WooCommerce, Shopify, BigCommerce Standard
• Headless: commercetools, Saleor, Medusa
• Custom: Node.js/React, Python/Django, PHP/Laravel

Content Management

• Traditional: WordPress, Drupal, Joomla
• Headless: Contentful, Sanity, Strapi, Prismic
• E-commerce CMS: Shopify, BigCommerce
• Custom: Next.js + CMS, Gatsby + CMS

Cloud & Hosting

• Cloud Providers: AWS, Google Cloud, Microsoft Azure
• CDN: Cloudflare, Fastly, AWS CloudFront
• Hosting: Vercel, Netlify, AWS, WP Engine
• SSL: Let's Encrypt, Cloudflare SSL, commercial certificates

Success Stories Across USA

San Francisco E-commerce Transformation

Rebuilt e-commerce platform for Bay Area lifestyle brand: - 350% increase in online revenue within 12 months - Sub-2 second load time across USA - 99.9% uptime during peak shopping seasons - WCAG 2.1 Level AA certified accessibility - 40% mobile conversion improvement

NYC Professional Services Website

Created marketing website for Manhattan consulting firm: - First page Google rankings for 15 competitive US keywords - 200% increase in organic traffic from US searches - 65% increase in qualified leads from website - ADA compliant protecting against lawsuits - Featured in Google rich results with schema markup

Austin SaaS Web Application

Developed progressive web app for Texas tech startup: - $12M Series A funding secured with web platform - 50,000+ US users onboarded in first year - 95+ Lighthouse score for performance - Works offline for traveling American professionals - Installed on home screen by 35% of users

Seattle Retail Chain Website

Built omnichannel web experience for Pacific Northwest retailer: - 125 store locations integrated - Online ordering with in-store pickup across USA - Inventory visibility across all US locations - 300% increase in online orders - Unified customer data across channels

Regional Web Development Expertise

Silicon Valley & San Francisco

Leading-edge web development for Bay Area's innovation ecosystem. We understand the expectations of venture capitalists evaluating startups, the performance standards of Silicon Valley tech companies, and the rapid iteration pace required in competitive markets from San Francisco to San Jose.

New York City Digital Market

Experience serving NYC's diverse web development needs from Wall Street financial portals to Madison Avenue creative agencies. We understand East Coast design aesthetics, enterprise security requirements, and the sophisticated expectations of New York's digital-savvy audiences.

Austin & Texas Tech Scene

Growing presence in Austin's booming tech ecosystem. We help Texas companies establish powerful web presences combining Southern hospitality with Silicon Valley technical excellence, serving Austin's startup scene and enterprise relocations from coastal markets.

Seattle Enterprise Web

Partnerships with Seattle's enterprise software and e-commerce giants. We bring experience from Amazon's headquarters market, understanding both consumer-scale web applications and complex enterprise portals serving thousands of American businesses.

Los Angeles Creative Market

Expertise serving LA's creative industries, entertainment companies, and consumer brands. We combine technical excellence with creative design meeting the high standards of Southern California's design-conscious market and entertainment industry.

Investment & Pricing

Website Development

• Small Business Website: $15,000 - $35,000
• Corporate Website: $35,000 - $85,000
• Enterprise Website: $85,000 - $250,000+
• Landing Page Development: $5,000 - $15,000 per page
• Website Redesign: $25,000 - $150,000

E-commerce Development

• Shopify Store Setup: $20,000 - $50,000
• Shopify Plus Enterprise: $60,000 - $150,000
• WooCommerce Store: $25,000 - $75,000
• Custom E-commerce Platform: $100,000 - $500,000+
• Headless Commerce: $80,000 - $200,000

Web Application Development

• Progressive Web App: $50,000 - $150,000
• SaaS Web Platform: $80,000 - $250,000
• Customer Portal: $40,000 - $120,000
• Internal Business Application: $60,000 - $200,000

Ongoing Services

• Website Maintenance: $1,000 - $5,000/month
• SEO Services: $2,500 - $10,000/month
• Content Updates: $1,500 - $5,000/month
• Performance Monitoring: $500 - $2,000/month
• Hosting & Support: $500 - $3,000/month

All pricing includes design, development, ADA compliance, basic SEO setup, and training. Enterprise pricing available for large-scale projects and ongoing partnerships.