Hire the Best Payment Gateway Integration Specialists
in the United States

More than 3,000 reviews on G2
Rating is 4.5 out of 5.
4.5/5
of Upwork by G2 peer reviewers
Scott T.

Kalaheo, Hawaii

$66/hr
5.0
125 jobs

Top Rated USA Based! Online Payments Specialist. 10+yrs of experience with Low & High Risk Merchants Utilizing Shopify WIX Woo eCommerce Platforms. Specializing in Startups and able to service enterprise level merchants also. Happy to help with the following: - Native Gateway Integration for popular platforms like Shopify, Wix, and WooCommerce (eliminating cart redirects) - Automated Recurring Payments for subscription-based "subscribe & save" offerings - A convenient Buy Now Pay Later option for your customers - An Invoice Feature that allows you to send payable email invoices and text payment links - Comprehensive Credit Card Payment Processing capabilities - Options for Crypto Payment Processing - Echeck Payment Processing functionality - Integrated AI Marketing Tools to support your promotional efforts - Advanced Fraud Tools to protect your transactions - Chargeback Alerts to help you manage payment disputes - ApplePay integration for seamless mobile payments - QuickBooks Integration for streamlined accounting - POS systems and Card Readers for efficient in-person sales * Worldwide Payments Solutions for Any Region and Products or Service type * Navigating the challenges High Risk Merchant Account Setup * Multiple MID's for volume load balancing or different region coverage * Fast Timelines for Approval, Integration, and Deployment * Full project management from start to finish Constant Communication is key to me when dealing with something as important as your sales revenues and functionality. Let's keep in touch, Aloha!

  • Payment Gateway Integration
  • Payment Gateway
  • Wix
  • Shopify
  • API Integration
  • Merchant Account Setup
  • Payment Processing
  • Payment Functionality
  • Payment Plugin
  • Mobile Payment Functionality
  • In-App Subscription
  • Ecommerce
  • Ecommerce Store Setup
  • Ecommerce Plugin Installation
  • Ecommerce Platform
Bhavesh D.

San Francisco, California

$75/hr
4.6
291 jobs

CRO | CTO | STRIPE CONNECT | STRIPE BILLING | STRIPE RADAR | STRIPE API | STRIPE CHECKOUT | STRIPE TERMINAL | FINTECH | SAAS | AI | PAYMENTS | COMPLIANCE ( PCI DSS, GDPR) CRO | Meta Ads | Google Ads | ROAS | CAC XERO | QUICKBOOKS | ACCOUNTING SOFTWARE INTEGRATION FRACTIONAL CTO SERVICES | SCALABLE MVP DEVELOPMENT | REMOTE TEAM LEADERSHIP | TECHNICAL ROADMAPPING | STRIPE CONSULTING & DEVELOPMENT | AI | AUTOMATION Fractional CTO | 17+ Years IT Leadership | FinTech & Healthcare | Scalable MVPs | Stripe & Payments Expert I bring 17+ years of experience in technology, 10 years in FinTech and 2 years in AI—leading startups from concept to scale. As a Fractional CTO, I specialize in architecting investor-ready MVPs, building and managing remote engineering teams, and aligning technical roadmaps with business milestones. My approach balances speed-to-market with the long-term stability investors expect. As a Certified Stripe Expert, I’ve delivered 200+ projects across SaaS, eCommerce, and healthcare, helping founders design, integrate, and optimize payments that drive revenue and meet global compliance standards. Beyond Stripe, I manage full product lifecycles, ensuring delivery on time, within budget, and aligned with growth objectives. I’m also passionate about AI-driven automation, applying conversational AI, intelligent bots, and no/low-code workflows to simplify operations and create scalable, cost-efficient systems. What I Offer: Fractional CTO leadership & technical roadmapping Stripe consulting, integration, and optimization Scalable MVP development with investor alignment End-to-end project & product management (Agile/Scrum) AI-powered automation for payments, SaaS, and operations If you’re looking for a CTO who blends deep technical expertise with executive strategy, I’d be glad to help shape and scale your product. SKILLS: ✓✓✓ Payment Gateway Integrations ✓✓✓ Payment Gateway Migrations ✓✓✓ Technical Roadmapping ✓✓✓ Startup Fundraising Support ✓✓✓ Cloud Architecture (AWS, GCP, Azure) ✓✓✓ Remote Team Leadership ✓✓✓ SaaS Architecture ✓✓✓ Healthcare Technology (HIPAA, HL7, FHIR) ✓✓✓ FinTech Compliance (PCI DSS, PSD2) ✓✓✓ Scalable MVP Development ✓✓✓ Vendor Management ✓✓✓ AI Software Development ✓✓✓ AI Agent Development ✓✓✓ No/Low Code Development • STRIPE • PAYPAL • Authorize.net • 2 Checkout • Sage Pay • Square • WorldPay • RazorPay • WeChat Pay • iDeal • Klarna • QuickBook TaxJar • Xero • AI • ChatGPT • LangChain Tech Stack & Leadership Capabilities ✓ DevOps & Infrastructure: CI/CD pipelines, Docker, Kubernetes, infrastructure-as-code (Terraform, Ansible), monitoring & observability (Datadog, Prometheus, Grafana). ✓ Cybersecurity & Compliance: Identity and access management, encryption standards, SOC2 & GDPR compliance, penetration testing oversight. ✓ Data & Analytics: Data pipelines, ETL, real-time processing (Kafka, Spark), business intelligence dashboards. ✓ Mobile Oversight: iOS/Android (Swift, Kotlin, React Native, Flutter) – leadership & architectural guidance. ✓ Scalability & Reliability: Microservices architecture, high availability (HA), disaster recovery (DR), event-driven systems. ✓ Product Strategy: Product-market fit, UX/UI oversight, customer-driven roadmaps, investor milestone alignment. Core Development Expertise: ✓ Languages & Frameworks: Python, Java, Node.js, Next.js, PHP, Java EE (Servlet, JSP, EJB, Hibernate, Spring). ✓ Web & CMS: WordPress, WooCommerce. ✓ Databases: MySQL, Oracle. ✓ Cloud: AWS, GCP, Azure. ✓ OS: Linux, Windows. ✓ Front-End: JavaScript, jQuery, AJAX, Node.js. ✓ APIs & Integrations: REST APIs, ChartMogul, Twilio, Mailchimp, HubSpot, Facebook Graph, Google Maps, Twitter. ✓ Video Handling: Cloudflare Stream (direct upload, processing, secure playback). ✓ Tooling & Automation: Jenkins, MQ, Agile/Scrum workflows.

  • Payment Gateway Integration
  • Payment Gateway
  • Stripe
  • PayPal Development
  • Payment Plugin
  • Payment Processing
  • Payment Functionality
  • Payment Integration Framework
  • Mobile Payment Functionality
  • Point of Sale & Payment Systems
  • PayPal
  • Stripe API
  • Stripe SDK
  • Google Ads
  • Conversion Rate Optimization
Adam S.

Chicago, Illinois

$60/hr
4.2
102 jobs

I'm a NY/Chicago based software engineer looking to build relationships with B2B and B2C brands. - Hydrogen, Liquid, Next.js, Stencil, Vue Storefront - Sanity, Contenful, Wordpress, Hubspot - LAMP, or MERN stack - Klaviyo, Active Campaign, SendGrid - Salesforce, Acumatica, Zoho, HubSpot, SAP - Algolia, Elastic, Nosto, Searchspring - AWS, Azure, Google APIs

  • Payment Gateway Integration
  • API Integration
  • Vue.js
  • Theme Customization
  • BigCommerce
  • WordPress
  • JavaScript
  • PHP
  • API Development
  • Google APIs
  • Nuxt.js
  • DNS
  • JSON
  • Payment Processing
Bilal I.

Spring, Texas

$30/hr
5.0
3 jobs

I help businesses, agencies, and growing brands build custom CMS solutions that are fast, scalable, and designed around real business needs, not just attractive websites. My primary expertise is WordPress, WooCommerce, and Shopify, where I build everything from business websites and eCommerce stores to booking systems, LMS platforms, membership websites, and custom business portals. I also work with Webflow, Squarespace, and Wix for projects that are better suited to those platforms. What sets me apart is my development background. Unlike developers who rely mainly on drag-and-drop builders, I regularly work with PHP, MySQL, JavaScript, REST APIs, custom plugins, custom themes, database design, and third-party integrations. This allows me to build custom functionality when plugins aren't enough and create solutions that remain reliable and maintainable as your business grows. CMS EXPERTISE WordPress & WooCommerce ✔ Custom WordPress Development ✔ WooCommerce Development & Customization ✔ Custom Theme & Plugin Development ✔ API Integrations ✔ Booking & Reservation Systems ✔ Membership Websites ✔ LearnDash & Masteriyo LMS ✔ Elementor Pro ✔ Bricks Builder ✔ Gutenberg ✔ Advanced Custom Fields (ACF) ✔ Custom Post Types (CPT) ✔ Technical SEO ✔ Core Web Vitals Optimization ✔ Website Performance & Security Shopify ✔ Shopify Store Development ✔ Theme Customization ✔ Shopify 2.0 ✔ Liquid Customization ✔ App Integrations Other CMS Platforms ✔ Webflow ✔ Squarespace ✔ Wix ✔ CMS Migration ✔ Responsive Business Websites SELECTED PROJECTS ✔ HelloGP – Custom healthcare platform with tailored WordPress development. ✔ Tonic Living – Large-scale WooCommerce development and performance optimization. ✔ Training Centre Canada – Professional training platform with custom functionality. ✔ Practical RA – Learning platform with custom workflows and integrations. ✔ Scratch Pet Food – Performance-focused WooCommerce website. ✔ Fern Colab – Custom WordPress website for a digital marketing agency. ✔ Seattle WP Residence – Real estate website with advanced property management. ✔ Cooper Design Builders – Custom business website for a construction company. ✔ J3GC – Corporate website with custom functionality. ✔ La Florida – Tourism-focused website with a modern user experience. ✔ Heals – Home & furniture eCommerce experience. ✔ Muuto – Modern product-focused website implementation. INDUSTRIES I WORK WITH 🏥 Healthcare 🎓 Education & LMS 🛒 eCommerce 🏡 Home & Interior 🏢 B2B & Corporate 🏘 Real Estate ✈ Travel & Tourism 📈 Marketing & SEO SERVICES ✔ Custom CMS Development ✔ WordPress Development ✔ WooCommerce Development ✔ Shopify Development ✔ Webflow Development ✔ Squarespace Development ✔ Wix Development ✔ Custom Plugin Development ✔ API Integrations ✔ Booking Systems ✔ Membership Websites ✔ LMS Development ✔ Website Speed Optimization ✔ Technical SEO ✔ Website Migration ✔ Ongoing Maintenance & Support WHY CLIENTS WORK WITH ME ✅ Development-first approach, not just page builders ✅ Clean, scalable, and maintainable code ✅ Strong understanding of business workflows ✅ Reliable communication and on-time delivery ✅ Performance, security, and long-term maintainability Whether you need a business website, WooCommerce store, Shopify store, LMS platform, booking system, or a fully customized CMS solution, I focus on building websites that are fast, reliable, easy to manage, and built to support your business as it grows. If you're looking for a developer who can combine modern CMS platforms with custom functionality and solid engineering practices, I'd be happy to discuss your project.

  • Payment Gateway Integration
  • WordPress
  • WooCommerce
  • Shopify
  • Elementor
  • API Integration
  • PHP
  • JavaScript
  • LearnDash
  • WPML
  • Theme Development
  • Plugin Development
  • Technical SEO
  • Website Redesign
  • Squarespace
  • Wix
  • Advanced Custom Fields Plugin
  • MySQL
  • PSD to CMS
  • Website Customization
Ahsan H.

Sacramento, California

$40/hr
5.0
2 jobs

✨ Senior API Integration & AI Automation Specialist | LLM & OpenAI Expert ✨ Core Expertise: API Integrations • AI Agents • LLM Applications • OpenAI API • Payment Gateways • ERP Systems • Chatbots • Microservices • Marketing Tools • Healthcare Systems • Financial Platforms • Middleware • CRM • Social Media APIs • Databases • E-commerce • Workflow Automation • HubSpot • Salesforce • QuickBooks API • NetSuite Integration • Odoo ERP Development • Zoho Books API I help businesses connect platforms, automate workflows, and build scalable AI-powered systems using APIs, LLMs, and modern backend technologies. My expertise includes API integrations, AI agents, OpenAI-powered applications, payment gateway systems, CRM/ERP synchronization, workflow automation, and custom middleware development. I focus on building reliable integrations that improve operational efficiency, reduce manual work, and scale smoothly with business growth. Core Expertise: ✔ API Integrations ✔ AI Agents & LLM Applications ✔ OpenAI API & Automation ✔ Payment Gateway Integrations ✔ QuickBooks & Xero Integrations ✔ CRM & ERP Systems ✔ Twilio, WhatsApp & Messaging APIs ✔ Webhooks & Microservices ✔ Healthcare & Financial Systems ✔ E-commerce Integrations ✔ Custom Backend Development Tech Stack: Node.js • NestJS • Python • FastAPI • Express.js • PostgreSQL • MongoDB • Redis • REST APIs • GraphQL • Docker • AWS • Firebase I’ve worked on integrations involving payment platforms, accounting systems, AI chatbots, communication APIs, SaaS products, and enterprise workflow automation systems. Why clients work with me: ✅ Clean and scalable architecture ✅ Fast communication and reliable delivery ✅ Business-focused solutions ✅ Long-term maintainable systems ✅ Strong debugging and problem-solving skills If you need an experienced developer to build secure integrations or AI-powered automation systems, feel free to invite me to your project or schedule a quick chat. Full Stack Developer | MERN Stack Developer | Base44 Developer| React.js Developer | Next.js Developer | Node.js Developer | JavaScript Developer | Web Application Development | Custom Web Applications | SaaS Development | MVP Development | Startup Developer | Scalable Web Applications | Backend Developer | Frontend Developer | API Integration | REST API Development | GraphQL API | API Developer | Third-Party Integrations | Payment Gateway Integration | Stripe | PayPal | CRM Integration | HubSpot | Zoho| Salesforce | Dashboard Development | Admin Panel Development | Automation Developer | Workflow Automation | Zapier | Make | Integromat | n8n | Database Design | MongoDB | PostgreSQL | MySQL | Firebase | Supabase | Redis | Real-Time Applications | Web Performance Optimization | Responsive Web Design | Tailwind CSS | Modern UI/UX | Cloud Deployment | AWS | Vercel | Docker | CI/CD Pipelines | GitHub Actions | Serverless Architecture | Microservices Architecture | Secure Authentication | JWT | OAuth) | Role-Based Access Control | RBAC | SaaS Platforms | Marketplace Development | Booking Systems | ERP Systems | CRM Systems | Scalable Backend Systems | Twilio API | WhatsApp API | SMS API | Messaging API | VOIP Systems | Cloud Telephony | Call Automation | Auto Dialer Systems | IVR Systems | Call Routing | WebRTC | SIP Integration | Call Recording & Analytics | CRM Calling Integration | QuickBooks Online Integration | QBO Automation | Accounting Workflow Automation | Financial Data Sync | Invoicing & Payments Sync | Expense & Transaction Automation | Bookkeeping Integrations | POS to QuickBooks Sync | Payroll & Reporting Automation | NetSuite Integration | Odoo ERP Development | Zoho Books API Integration | ERP & Accounting Software Integrations

  • Payment Gateway Integration
  • Web Development
  • React
  • Django
  • PHP
  • Vue.js
  • Node.js
  • NestJS
  • Xero
  • Shopify
  • QuickBooks Online
  • Supabase
  • n8n
  • Data Visualization
  • Python
  • Twilio
  • Automation
  • SMS Gateway
  • Shipping & Order Fulfillment Software
  • OpenAI API
Rebecca D.

Sebring, Florida

$10/hr
5.0
6 jobs

⚡ Hey! Wait a second, why lose a lead when I’m available to build you a WordPress website that not only converts visitors into paying customers but also retains them and turns them into long term clients? 💬 Here’s what clients have to say about working with me: ⭐ “Rebecca was amazing to work with! She delivered a clean, modern, and fast WordPress website that exceeded our expectations. Great communication, attention to detail, and very skilled with Elementor. Highly recommended!” 🚀 I build high performance WordPress and WooCommerce websites designed for speed, SEO, scalability, and conversion using modern tools like Elementor, Gutenberg, Divi, and advanced optimization strategies. ⭐⭐ WHAT I DO ⭐⭐ 👉 CUSTOM WORDPRESS WEBSITE DEVELOPMENT I develop fully customized WordPress websites with clean code, responsive layouts, and scalable architecture. Every build follows SEO best practices including keyword structure, schema markup, internal linking, and proper heading hierarchy to improve rankings on Google. Your website will be optimized for performance, mobile responsiveness, and user experience from the ground up. 👉 WOOCOMMERCE STORE DEVELOPMENT AND OPTIMIZATION I build conversion focused WooCommerce stores with optimized product pages, cart flows, checkout optimization, and secure payment gateway integration. I implement sales funnels, upsells, cross sells, abandoned cart recovery, and product schema to maximize conversions and customer retention. 👉 ELEMENTOR, GUTENBERG, DIVI AND WPBAKERY DEVELOPMENT I design and develop websites using Elementor Pro, Gutenberg block editor, Divi Builder, and WPBakery with a focus on speed, flexibility, and clean UI. You get a visually appealing website that is also easy to manage and scalable. 👉 SEO OPTIMIZATION AND TECHNICAL SEO SETUP I implement full on page and technical SEO including keyword research integration, metadata optimization, schema markup, XML sitemaps, URL structure, internal linking, and indexing improvements to increase organic visibility. 👉 LANDING PAGES AND CONVERSION OPTIMIZATION I create high converting landing pages using conversion psychology, optimized layouts, strong call to actions, and user behavior insights to increase leads and sales. 👉 WEBSITE REDESIGN AND UX UI IMPROVEMENT I redesign outdated or underperforming websites with modern UI and UX strategies to improve engagement, navigation, readability, and overall conversion rates. 👉 WORDPRESS SECURITY, BUG FIXES AND MAINTENANCE 🎯 WHY HIRE ME AS YOUR WORDPRESS DEVELOPER 🏆 Conversion focused development 🏆 Strong WordPress and WooCommerce expertise 🏆 SEO and performance optimized builds 🏆 Mobile responsive and user friendly design 🏆 Scalable and future ready websites 🏆 Clean code and structured development 🏆 Fast turnaround and clear communication 🏥 INDUSTRIES I HELP 🏥HEALTHCARE AND WELLNESS ADA and WCAG compliant websites, HIPAA conscious design, secure forms, and patient friendly user experience. 🛒 ECOMMERCE AND ONLINE STORES High converting WooCommerce stores with optimized product pages, funnels, and checkout systems. 🏆 COACHES, CONSULTANTS AND PERSONAL BRANDS Lead generation systems, booking integrations, and authority focused website structures. 🛠 CONSTRUCTION, HOME SERVICES AND LOCAL BUSINESSES Local SEO optimization, service area targeting, and lead capture focused layouts. 🏠 REAL ESTATE AND PROPERTY BUSINESSES IDX integration, property listing systems, and seamless navigation experiences. 🧘‍♀️ FITNESS, YOGA AND LIFESTYLE BRANDS Membership systems, class booking features, and engaging brand focused designs. 👩‍👧 NONPROFITS AND ORGANIZATIONS Donation systems, event management, and storytelling driven layouts to increase engagement. 🕵️‍♂️ CORPORATE AND PROFESSIONAL SERVICES Clean, modern, and trust building websites designed to establish authority and credibility. 🛠️ MY WORDPRESS SERVICES ✔ FULL WORDPRESS WEBSITE DESIGN AND DEVELOPMENT ✔ WOOCOMMERCE STORE SETUP AND CUSTOMIZATION ✔ ELEMENTOR, GUTENBERG, DIVI AND WPBAKERY DEVELOPMENT ✔ WEBSITE REDESIGN AND CONVERSION OPTIMIZATION ✔ WORDPRESS SPEED OPTIMIZATION AND CORE WEB VITALS FIX ✔ TECHNICAL SEO AND ON PAGE OPTIMIZATION ✔ PAYMENT GATEWAY INTEGRATION (STRIPE, PAYPAL AND MORE) ✔ PLUGIN DEVELOPMENT AND CUSTOMIZATION ✔ WEBSITE MIGRATION AND HOSTING SETUP ✔ ONGOING MAINTENANCE AND SUPPORT ⚙️ TOOLS I USE 🔹 Elementor Pro, Gutenberg, Divi, WPBakery 🔹 WooCommerce 🔹 Rank Math, Yoast SEO 🔹 Google Analytics, Google Search Console 🔹 WP Rocket, LiteSpeed Cache 🔹 Cloudflare CDN 🔹 Advanced Custom Fields (ACF) 🔹 HTML, CSS, JavaScript, PHP 🔹 Stripe, PayPal, Zapier 🔹 Wordfence, Sucuri 🚀 LET’S TURN YOUR WEBSITE INTO A REVENUE MACHINE Ready to turn your website into a powerful tool that attracts customers, builds trust, and drives real business growth? Let’s work together to create a fast, modern, and conversion focused WordPress website that delivers results. 🚀

  • WordPress
  • Web Design
  • Elementor
  • Web Development
  • WordPress Theme
  • WooCommerce
  • WordPress Development
  • Graphic Design
  • JavaScript
  • HTML
  • CSS
  • PHP
  • WordPress e-Commerce
  • WordPress Plugin
  • WordPress Optimization
  • WordPress Website Design
  • WordPress Landing Page
  • WordPress Website
  • Figma
  • Website Redesign

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