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!
Wix
Shopify
API Integration
Payment Gateway Integration
Payment Gateway
Merchant Account Setup
Payment Processing
Payment Functionality
Payment Plugin
Mobile Payment Functionality
In-App Subscription
Ecommerce
Ecommerce Store Setup
Ecommerce Plugin Installation
Ecommerce Platform
Funmi E.
Frisco, Texas
$25/hr
5.0
9 jobs
I know you need a Squarespace specialist who builds clean, modern, conversion-focused websites, from full site builds and landing pages to ongoing maintenance, you just found the right person.
I work exclusively in Squarespace and have delivered hundreds of projects for coaches, therapists, consultants, service businesses, eCommerce brands, photographers, and creatives. I specialize in Squarespace 7.1 and Fluid Engine, and I know how to make the platform do things most developers think require heavy custom code, using Squarespace's own widgets first, CSS only where it genuinely adds value.
What I build and fix:
Full website builds and complete redesigns from provided copy, branding, and design direction. Landing pages built for lead generation and conversions, with strong visual hierarchy, clear calls-to-action, and mobile layouts that feel considered not squeezed in as an afterthought. I also handle ongoing edits and maintenance: text updates, image swaps, section additions, layout fixes, and integrations with third-party tools like Acuity, Calendly, Mailchimp, Stripe, and more.
Many clients come to me after an AI tool or a previous freelancer left them with broken mobile layouts, inconsistent typography, poor whitespace usage, weak SEO structure, or a site that simply does not look professional. I clean it up and deliver something that looks like it came from a high-end studio.
What every project includes:
Mobile responsiveness tested on real devices, not just preview mode. On-page SEO setup including meta titles, descriptions, header structure, alt text, and clean URL slugs. Typography and spacing that respects your brand guidelines. Conversion-focused design with CTAs placed where they actually work. And clear communication throughout, I work well from a detailed brief and do not need hand-holding to keep things moving.
Bonus I bring:
Experience with eCommerce builds, product pages, booking system setup, and Shopify integrations. A track record working with therapy, healthcare, wellness, and professional services brands. And a speciality in fixing AI-generated websites, I know exactly where those sites fall apart and how to finish them properly.
I am a Top Rated Squarespace Expert on Upwork. Ready to build something exceptional? Send me a message.
Squarespace
Web Design
Website Redesign
Landing Page Design
Search Engine Optimization
CSS
HTML
Responsive Design
Ecommerce Website Development
Figma
Website Customization
Graphic Design
UX & UI Design
Website Migration
Brand Identity & Guidelines
Canva
Adobe Photoshop
Content Management System
Conversion Rate Optimization
Page Speed Optimization
Ahsan H.
Sacramento, California
$65/hr
5.0
2 jobs
✨ Senior API Integration & AI Automation Specialist | LLM & OpenAI Expert | Voice AI | Twilio API✨
Core Expertise:
API Integrations • GHL Automation • AI Agents • LLM Applications • OpenAI API • CPaaS system • Vapi • Twilio • 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 | CPaaS | Communications Platform as a Service.
React
Django
Vue.js
Node.js
Xero
Shopify
QuickBooks Online
Supabase
Data Visualization
Python
Twilio
Automation
SMS Gateway
Shipping & Order Fulfillment Software
OpenAI API
Payment Gateway Integration
AI Agent Development
Make.com
Telephone System
Bhavesh D.
San Francisco, California
$75/hr
4.5
297 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.
PayPal
PayPal Development
Stripe
Payment Gateway Integration
Payment Plugin
Payment Gateway
Payment Processing
Payment Functionality
Payment Integration Framework
Mobile Payment Functionality
Point of Sale & Payment Systems
Stripe API
Stripe SDK
Google Ads
Conversion Rate Optimization
Keanu A.
Harlingen, Texas
$45/hr
5.0
16 jobs
Most engineers have touched Stripe. I've built Stripe Connect platforms numerous times
- KYC onboarding
- Fee splitting
- Multi-currency Payment Intents
- Apple Pay
- Idempotent webhook processing, all in production, all times at scale.
I'm a full-stack engineer with a focus on payment infrastructure, multi-tenant SaaS backends, and serverless AWS.
Five-plus years of shipping things end-to-end:
- NestJS/Prisma APIs
- Next.js dashboards
- AWS CDK stacks.
Solo builds, documented, production-ready.
On a recent donation platform, I killed a 30-second API Gateway timeout by rebuilding the export pipeline around SQS and Lambda workers. It now processes 1M+ record exports without a single failure.
Same project: zero-downtime UUID migration across 15 live tables and an AWS infrastructure stack that cut idle costs by roughly 70% compared to always-on servers.
The pattern across every project is the same. I write the spec before I write the code. I document while I build, not after. And when a technical decision is going to affect your timeline or your cloud bill, I say so in plain language, not in a after the fact.
I'm a good fit for founders and product teams working on marketplaces, SaaS tools, fintech, or subscription platforms who need someone to own the backend, ship the frontend, and not require a team around them to do it.
If that's what you're building, send me a message. I'll give you a straight read on scope and timeline, usually same day.
MySQL
Data Extraction
Automation
API
Google Chrome Extension
Selenium WebDriver
JavaScript
PHP
Browser Extension
Python
Web Application
Amazon Web Services
Flask
Twilio API
Amy C.
Mequon, Wisconsin
$70/hr
4.9
89 jobs
With over 20 years of experience as a Financial Controller, I bring deep, hands-on expertise in bookkeeping, accounting systems, and financial operations. I help businesses get accurate, organized, tax-ready books.
I specialize in QuickBooks clean-ups, reconciliations, and full-cycle monthly bookkeeping for law firms, contractors and trades, ecommerce sellers, agencies, consultants, and other growing small businesses. You can learn more about my approach at accountingatelier.com.
Core services include:
• Full-charge bookkeeping and account reconciliations
• Catch-up and clean-up projects
• Payroll management (Gusto, ADP, Paychex, 1099s)
• Accounts receivable and payable
• Monthly financials and cash-flow reporting
• Budgeting and forecasting support
• Tax preparation coordination and year-end close
As a QuickBooks ProAdvisor, I’m comfortable stepping into complex accounts and bringing them current - whether that means resolving mismatched balances, bank reconciliations, or structuring a clean workflow that actually supports decision-making. Clients rely on me to deliver accurate financial data they can trust, month after month.
Certifications
• 2024 — QuickBooks ProAdvisor
• 2022 — Bookkeeper Launch Certificate of Completion
• 2022 — Wharton: Entrepreneurship Acceleration Program, Scaling Your Business
Professional Highlights
• Expert in month-end close and GAAP-compliant reporting
• Strong background in financial analysis, trend identification, and cash-flow planning
• Experienced in managing audits, compliance, and documentation
• Skilled at translating financial data into clear, actionable insights
If your books need to be cleaned up, caught up, or kept up - I can help you get organized, accurate, and ready to grow.
Account Reconciliation
Bank Reconciliation
Accounting
Invoicing
Financial Accounting
Accounts Payable Management
Financial Reporting
Accounts Receivable Management
Light Bookkeeping
Data Entry
Accounting Advisory
Bookkeeping
QuickBooks Online
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