Built and deployed 𝐬𝐜𝐚𝐥𝐚𝐛𝐥𝐞 𝐒𝐚𝐚𝐒 𝐩𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬, 𝐀𝐈-𝐢𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐞𝐝 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬, 𝐚𝐧𝐝 𝐡𝐢𝐠𝐡-𝐩𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐰𝐞𝐛 𝐬𝐲𝐬𝐭𝐞𝐦𝐬 for real-world business environments, helping teams launch faster, automate workflows, and scale without breaking in production. With 7+ years of experience, I specialize in 𝐍𝐨𝐝𝐞.𝐣𝐬, 𝐍𝐞𝐱𝐭.𝐣𝐬, 𝐌𝐄𝐑𝐍 𝐬𝐭𝐚𝐜𝐤, 𝐏𝐲𝐭𝐡𝐨𝐧, 𝐚𝐧𝐝 𝐒𝐭𝐫𝐢𝐩𝐞 𝐢𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬, delivering systems that are stable, secure, and built for scale. I help startups and growing businesses go from 𝐢𝐝𝐞𝐚 → 𝐌𝐕𝐏 → 𝐩𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐨𝐧-𝐫𝐞𝐚𝐝𝐲 𝐩𝐫𝐨𝐝𝐮𝐜𝐭, without the usual delays, technical debt, or broken deployments 💡 𝐖𝐡𝐚𝐭 𝐈 𝐂𝐚𝐧 𝐇𝐞𝐥𝐩 𝐘𝐨𝐮 𝐖𝐢𝐭𝐡 ➝ Build SaaS platforms (from MVP to scalable systems) ➝ Develop AI-powered web applications (OpenAI, LLM integrations) ➝ Create backend systems & APIs that scale under load ➝ Implement Stripe / PayPal payment systems (subscriptions, billing, webhooks) ➝ Develop real-time dashboards & automation systems ➝ Fix, optimize, or scale existing applications 𝐂𝐨𝐫𝐞 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 ➝ Backend: Ruby on Rails, Node.js, Python, NestJS, Elixir/Phoenix ➝ Frontend: React, React Native Next.js, Tailwind CSS, Angular ➝ APIs: REST & GraphQL, third-party integrations ➝ Auth & Security: Devise, JWT, Role-Based Access Control ➝ Payments: Stripe & PayPal (subscriptions, invoicing, webhooks) ➝ Databases: PostgreSQL, MongoDB, Supabase ➝ Cloud & DevOps: AWS, Docker, CI/CD pipelines ➝ Real-Time Systems: Dashboards, background jobs, automation If you're building a SaaS product, AI system, or scalable web application and want to move faster using modern tech like MERN, Node.js, Python, Supabase, and AI integrations, send me a message. Keywords: Full-Stack Developer, MERN Stack Developer, Node.js Developer, Next.js Developer, React Developer, SaaS Developer, AI Integration Developer, OpenAI API, LLM Integration, LangChain, Stripe Integration, Payment Gateway, REST API, GraphQL, AWS, Docker, CI/CD, MongoDB, PostgreSQL, Backend Developer, Web Application Development

Most businesses don't need another developer. They need someone who can connect systems, automate processes, and build the missing pieces between them. That's what I do. My background is in Full Stack development and payment systems, where I've spent years building products, integrations, and business-critical workflows. More recently, I've been focused on automation and AI-powered systems that eliminate repetitive work and connect the tools businesses rely on every day. What makes me different from many automation specialists is that I'm not limited to no-code tools. When an automation platform reaches its limits, I can build the custom APIs, backend services, dashboards, and integrations required to make the entire system work reliably. Automation & Integrations n8n | Make | Zapier | AI Workflows | OpenAI Integrations | Webhooks | REST APIs | Business Process Automation Stripe Stripe Connect | Subscription Platforms | Marketplace Payments | Payment Flows | Webhooks | Billing Systems | Checkout & Customer Portals | Revenue Operations Automation Full Stack Development React | Next.js | Node.js | TypeScript | SQL | PostgreSQL | MongoDB | Backend APIs AI Powered Enterprise Solutions | AI Workflow Automation | Fintech Solutions | CRM | MVP | Mobile Application Development | Web Development Projects I Typically Help With - Lead management and CRM automation - AI-powered business workflows - Internal operations systems - Stripe billing and subscription platforms - Custom integrations between multiple SaaS tools - Workflow automation with custom backend logic - Customer onboarding systems - Marketplace and payment infrastructure - Reporting and operational dashboards One thing I've learned from building software is that automation is rarely about the automation itself. The real challenge is designing systems that are reliable, scalable, and easy for teams to operate. That's why I approach every project from a systems perspective first, then choose the right combination of automation tools, APIs, and custom development to solve the problem. If you're looking for someone who understands both automation platforms and the engineering behind them, I'd be happy to discuss your project.

I help SaaS companies and marketplaces design scalable revenue systems using Stripe — not just basic payment integrations. If you need subscriptions, usage-based billing, or marketplace payouts that work reliably in production and scale with your business, I can help. 🚀 What I Do I specialize in building end-to-end payment architectures for modern digital businesses, including: SaaS platforms (monthly, yearly & usage-based billing) Marketplaces & platforms (Stripe Connect payouts & commissions) Subscription-based products & services Automated invoicing, billing & compliance workflows I don’t just connect Stripe APIs — I design the complete payment flow aligned with your business model, growth plans, and compliance needs. 🧠 Stripe Expertise Stripe Checkout & Payment Intents Stripe Subscriptions (fixed & usage-based pricing) Stripe Customer Portal Stripe Connect (Standard, Express & Custom) Marketplace payouts, splits & commissions Webhooks, automation & reporting Stripe Identity verification Multi-product & multi-website Stripe setups PCI & payment compliance best practices 🛠 Tech Stack & Tools Stripe PHP / Laravel Next.js (API routes & Stripe integrations) Node.js (basic integrations) Webhooks & background jobs Zapier / Make automation HubSpot CRM Airtable Bubble / Webflow (Stripe integrations) 📊 Experience & Approach Delivered 500+ Stripe-based platforms and marketplaces Strong focus on clean architecture & future scalability Business-first mindset — I think in terms of revenue, churn, and automation Clear communication & detailed handover documentation 🤝 How I Can Help You Design your SaaS or marketplace payment system from scratch Fix or optimize an existing Stripe setup Migrate billing logic without breaking live customers Automate billing, reporting, and payouts Advise on Stripe best practices before you scale If you’re looking for someone who understands both Stripe and the business behind it, let’s discuss your project. Thanks for going through it, and for your time. Quality Waiting To Meet You 😊

I help SaaS platforms and e-commerce businesses build, fix and stabilize payment systems. I specialize in Stripe integrations, subscription billing and multi-PSP payment architectures, with hands-on experience working with Stripe, Adyen, Worldpay, HiPay, Dalenys, Redsys and Revolut. I’m often brought in when payments stop working in production, failed payments, broken subscriptions, webhook issues or inconsistent payment states. Typical work I handle: • Stripe Checkout and payment integrations • Subscription billing systems (Stripe Billing) • Webhook debugging, idempotency and event reliability • Payment gateway migrations (Adyen, Stripe, etc.) • Fixing failed payments and broken renewal flows • Payment lifecycle synchronization (charge, refund, dispute) I’ve worked on high-volume payment systems handling thousands of daily transactions, designing reliable and scalable payment flows in production environments. If your payment system is not behaving as expected, I can help you quickly identify the issue and implement a clean, reliable solution.

Welcome To My Profile, About Me: 1. I am an experienced developer and designer. I believe in code. 2. I will convert your thoughts into Code. 3. I work until the client's last satisfaction. 4. I have Dreams. Experience: I am an expert in web development and design having 9+ years of experience with sound knowledge of HTML, CSS, BOOTSTRAP, Adobe Photoshop, Adobe Illustrator, Core Php, Object-Oriented Programming, MySQL Administration, Ajax, JavaScript, jQuery, Curl, JSON, Third Party API, etc...  Frameworks - Laravel, Yii(1,2), CakePHP, Zend Framework, Codeigniter.  JavaScript Frameworks - Node, React, ReactNative.  CMS & E-commerce Platforms - WordPress, Magento(1,2), Shopify, Prestashop, CS-Cart. -Web Development, Custom Integrations & Maintenance -E-Commerce Solutions -Bug Tracking & Fixing -Responsive Web Design -Theme Development, Customizations & Third-Party API Integrations -Plugins & Extension Development  Payment Gateway - Stripe, Paypal, Authorized.Net, Braintree, Payeezy, SagePay. - Stripe Elements (Stripe.Js) - Stripe Hosted Checkout - Stripe Checkout 3D Secure SCA (Strong Customer Authentication) - One-Time Payments - Buy Now Pay Later (On Hold) - Subscriptions/Recurring Payments - Stripe Connected Accounts API - Installment Payments - Customer Portal Development (Manage Personal, Billing & Shipping Details + Upgrade/Cancel Subscriptions + Update/Delete Bank Card + Pay Due Payments) - Stripe Creator Economy - Stripe Webhooks - Direct Invoicing - Stripe Apple Pay - Stripe Google Pay - Stripe SEPA - Stripe ACH  Web & Graphic Designing - Adobe Photoshop, Adobe Illustrator, Adobe Dreamweaver, Sketch.  Database Technology - Mysql, Mysqli, PDO, MongoDB, Firebase, SQLite.  Server Knowledge - FTP and Server like Godaddy, Hostgator, Bluehost, Crazy Domains, AWS, DigitalOcean, Cloudways, SiteGround.  Social Media Logins - Google, Facebook, Instagram, Twitter, Linkedin, Pinterest, etc...  Third-Party APIs - Etrade, Emsi, Affilicon, Amazon, eBay, Jira, Rets(Real Estate Transaction System), Expedia, Google Map API, Firebase, Walmart, Tinder, J-player, Bokun API, DHTML Gantt Chart.  Customer Relationship Management (CRM) Portal - Infusionsoft, Zoho, Zapier, Active Campaign, V tiger, Click-funnel, SugarCRM.  Project Management & Communicating Tools - Base-camp, Trello, Slack, App.Management, GitHub, Skype, Gmail, Zoom. Client satisfaction is my satisfaction and this is the hallmark of my success. I believe in respecting my clients, understanding their needs, and requirements, and living up to their expectations. By maintaining a high standard of ethics in my work values, I deliver great business and optimized services required by the clients. Regards Vikash

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.

Senior Full Stack Software Engineer with a M.Sc. in Computer Science and 12 years of experience crafting highly performant TypeScript, Python, and Rust applications. E-commerce specialist collaborating on multiple projects with startups & small businesses to develop Stripe & Shopify integrations, working directly with CEOs and Founders to make feature concepts a reality. Resume: tylercampbell.space/Tyler%20Campbell%20Resume%20(2025).pdf Expertise in collaborating with cross-functional teams at Fortune 500 companies and startups to transform ideas into successful products. Consistently enhancing operational efficiencies, leading to significant cost reductions, and driving business value while maintaining a strong focus on user experience and customer satisfaction. With a firm commitment to continuous learning and innovation to ensure alignment with industry trends while delivering exceptional results that address business goals and technical challenges.

I help businesses turn ideas into scalable, production-ready web systems. Over the past 7+ years, I’ve built high-performance web platforms for clinics, eCommerce brands, port authorities, automation-driven factories, and SaaS startups. My focus is not just writing code — it’s designing systems that are fast, scalable, and aligned with business growth. Whether it’s: • Conversion-focused website + headless content ( sanity, contentful, wordpress ) • SaaS MVP with authentication & Stripe payments • POS or sales tracking dashboard • An AI-powered surveillance system • Workflow automation platform connected to robotics • Dock & fabrication space planning tool • Scalable eCommerce storefront • Or a real-time operational dashboard I architect clean, maintainable solutions that are built to evolve. 🔹 What I Deliver ✔ Full-Stack SaaS & MVP Development (Next.js + Node.js) ✔ Healthcare & Clinic Websites (conversion-optimized, API-ready) ✔ eCommerce Platforms (custom storefronts & dashboards) ✔ POS & Sales Management Systems ✔ AI-Driven Web Applications ✔ Workflow Automation Platforms ✔ Real-Time Dashboards & Monitoring Systems ✔ Database Architecture (PostgreSQL, Supabase, MongoDB) ✔ Secure Auth, Role-Based Access & RLS Policies ✔ Stripe Payment Integrations 🔹 Technical Expertise Frontend: React.js, Next.js (SSR/SSG), TypeScript, Tailwind CSS, Redux Backend: Node.js, Express, REST APIs, Supabase, PostgreSQL, MongoDB Systems: Stripe, Auth Systems, Role-Based Access, Real-Time Systems (WebSockets / RabbitMQ), AWS Deployment Performance: SEO Optimization, 94+ PageSpeed builds, scalable architecture, cross-browser compatibility 🔹 My Approach I think like a product owner, not just a developer. I help clients: • Define scalable architecture early • Avoid technical debt in MVP stage • Launch fast without sacrificing structure • Prepare systems for growth and monetization I communicate clearly, estimate realistically, and take full ownership from architecture to deployment. If you’re building something seriou, not just a quick template site. I’m here to help you build it properly. Let’s discuss your idea. Hamza Iqbal

Fractional CTO, 6+ years across .NET, PHP/Laravel, React, and Java/Spring Boot. I build backend systems, payment integrations, APIs, and AI-powered features. Most of my Upwork work has been Stripe — subscriptions, payment gateways, bulk operations, cart integrations. Also ship full-stack apps, booking systems, and WordPress plugins. I respond fast, deliver early, and don't need hand-holding.

25+ years exp. - Full stack web developer, integrity is one of my core values. If you are looking for someone you can trust who has been building custom web solutions successfully for a long time, look no further. AI model integration, machine learning APIs, Stripe connect and custom Stripe checkouts, automated testing with AI. I build with the TALL stack ( Tailwind, Alpine, Livewire, Laravel ) and use Filmanetphp for rapid panel development. I've also built many custom WordPress plugins. AI augmented - I'm a claude code power user and Cursor is my IDE for fine tuning. I tend to have 2-3 AI coding assistant processes running at any given point in my workflow - for maximum productivity. I closely review generated code and pay tons of focus when/where needed. From one of my favorite reviews I've received here on Upwork - "I've never met such a skilled developer. I mean, we are talking world-class ladies and gentlemen! You are not going to discover a better developer anywhere else." -- Some recent projects; - Built a multi-tenant SaaS for scout troops, AI chatbot with API access to all the troops data like upcoming events, scout advancement progress, etc - Build an app that has a csv importer for companies, calls multiple APIs for gathering data about key people and uses LLM to generate targeted sales copy - Built an API for voice to text transcriptions to run on a local network machine - Setup local network open weights models for unlimited use without paying for tokens - Built a sales management system for an auto insurance dealer ( so his sales people could login, enter a sale, and commissions could also be tracked ) - Built a social network type app with courses and badges, a bit like linked in but focused on fast moving and fast shifting careers. - Built a platform for folks to promote their favorite business' and earn commissions. - Built a custom web application billing system for a contractor / sub - contractor service provider company that has dashboards for clients and vendors with billing and split payments so contractor earns platform fee. -- - "Joseph was kind, responsive, quick, direct, and receptive to feedback. If you have worked with other developers, you know how rare this is, and how important it is to find someone who truly cares about the quality of work they provide. He couldn't have been better to work with." "Joe is incredibly talented and an absolute pleasure to work with. He is our go-to guy for a variety of challenges and we have full confidence" "I really enjoyed working with Joseph. He was honest and direct with his communication. He didn't try to oversell his services. It was all about just getting the job done, doing it well, and communicating with me about what was going on throughout the whole process." - --- Ultimately, good web dev service consists of not only coding, but also translating your needs into solutions, communicating effectively, training you how to use the software, and giving you confidence along the way. I'm here for my clients to find their way through web dev projects. If there is anything I can't do, I'm happy to handle bringing in help on that specialty. I will be honest with you. My skills include but are not limited to; - Web App development - Laravel development - WordPress plugin development - Stripe integrations - Payment gateways - E-commerce - API integrations - AI automation I'm able to help with system design and database design, user experience, and optimization. I offer functionality consulting and can help prepare detailed requirements documents for larger projects. I do my best to provide ideas to solutions - when there is no clear path, a bit of research and some creativity can go a long way. Contact me to discuss your needs!