Payment Gateway Integration Engineers For Hire
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Hire CVInfotech
Custom Software, AI and SaaS Product Studio. 14 Years, One Platform. We have built exclusively on Freelancer.com for 14 years. 500+ projects delivered. 5.0 rating across 500+ reviews. 23% repeat hire rate. This is our only sales channel, so every project gets our full attention, not overflow from an agency spread...Custom Software, AI and SaaS Product Studio. 14 Years, One Platform. We have built exclusively on Freelancer.com for 14 years. 500+ projects delivered. 5.0 rating across 500+ reviews. 23% repeat hire rate. This is our only sales channel, so every project gets our full attention, not overflow from an agency spread across ten platforms. What we build Custom software and SaaS platforms. Full-stack, scalable, and built to hand off cleanly. AI native products. ChatGPT, Claude and Gemini integrations, AI chatbots, voice agents, workflow automation. Ecommerce and marketplaces. Shopify, WooCommerce, multivendor platforms. WordPress, Laravel, React, Next.js and Node.js. Production-grade, not template work. You will work directly with Akash (CTO, 14 years on this platform) and Shubham or Divya (client relationship leads, named by clients in reviews going back years). The same people from your first message to final delivery. No account handoffs, no rotating project managers. 152 professional recommendations back that consistency. 100% in house team. No outsourcing. We treat every project as if we are the ones maintaining it three years from now, because often we are. Some clients have stayed with us since 2012. If your project does not need custom development, we will tell you before you spend the money. Core expertise Frontend: React, Next.js, Vue, Angular, TypeScript Backend: Node.js, Express, NestJS, Laravel, FastAPI, Core PHP Mobile: React Native, Flutter Databases: PostgreSQL, MongoDB, MySQL, Supabase Cloud: AWS, Google Cloud, Docker AI and Automation: OpenAI, Claude and Gemini APIs, RAG pipelines, LangChain, AI agents CMS and Ecommerce: WordPress, Shopify, WooCommerce, Wix, Squarespace, BigCommerce, Magento, Joomla, OpenCart, Weebly, Webflow, GoDaddy Website Builder, headless CMS Payments, Billing and Subscriptions: Stripe, Stripe Connect, PayPal, Razorpay, WooPayments, NOWPayments, ccBill, LemonSqueezy, Peppol Voice and Telephony: VAPI for inbound and outbound call orchestration with function calling, Twilio for phone number provisioning CRM and Automation: HubSpot, Zapier Lead Generation and Landing Pages: HubSpot, Odoo, Webflow, GoHighLevel, Apify, Outscraper Email and Communication: Postmark, Nodemailer, Mailivery, Gmail API, Microsoft Graph API, Yahoo IMAP, SendGrid AI Assisted Development: Cursor, Replit, Bubble, WeWeb, Lovable, Bolt, Base44 Let's talk about what you are trying to build. less -
Hire imagicaworld
Welcome to My Profile! I’m proud to be ranked among the Top 20 Freelancers on this platform—a recognition of my consistent focus on quality, innovation, and client satisfaction. 🚀 My Mission To deliver high-quality, scalable, and innovative digital solutions that exceed client expectations—always delivered on...Welcome to My Profile! I’m proud to be ranked among the Top 20 Freelancers on this platform—a recognition of my consistent focus on quality, innovation, and client satisfaction. 🚀 My Mission To deliver high-quality, scalable, and innovative digital solutions that exceed client expectations—always delivered on time. What I Do I build custom mobile and web applications that are fast, user-friendly, and aligned with your business goals. With over 9 years of experience and deep expertise in technologies like: Flutter (Cross-platform mobile apps) Node.js & Laravel (Powerful backend systems) React.js & HTML (Responsive web frontends) Shopify (Ecommerce solutions) Native iOS & Android Development I ensure seamless performance across all platforms. Whether you're launching a new product or enhancing an existing system, I offer clean code, a smooth process, and results you can rely on. ✅ My Track Record 400+ Mobile Applications delivered 350+ Web Applications completed 9+ years of hands-on development experience Why Hire Me? 🔹 Top-Rated & Trusted by clients worldwide 🔹 Pixel-Perfect Quality in every project 🔹 Deadline-Oriented – I respect your time 🔹 Clear Communication and ongoing support Let’s bring your idea to life! Click the ‘Hire Me’ button and let’s start building something impactful together. less -
Hire flapjakc
I'm a full-stack developer running MapleStack, helping businesses turn ideas into working software across web, mobile, and AI-integrated platforms. My approach is simple: understand the real problem first, scope honestly, then build something clean enough to still make sense a year from now. Experience 8+ years...I'm a full-stack developer running MapleStack, helping businesses turn ideas into working software across web, mobile, and AI-integrated platforms. My approach is simple: understand the real problem first, scope honestly, then build something clean enough to still make sense a year from now. Experience 8+ years across SaaS platforms, e-commerce systems, and AI-integrated web applications. I've built custom CRMs, marketplace platforms, booking and payment systems, and automation pipelines connecting LLMs to real business workflows. Core Stack Frontend: React, Next.js, Vue.js Backend: Node.js, Laravel, Express, Django/Flask where the project calls for it E-commerce/CMS: WordPress, WooCommerce, Shopify, PrestaShop Databases: MySQL, PostgreSQL, MongoDB, Supabase AI/Automation: OpenAI and Anthropic API integration, n8n, LangChain-based agent workflows Payments/Integrations: Stripe, PayPal, Twilio, REST/GraphQL APIs, headless CMS Background Bachelor of Commerce (Marketing) and a BSc in Psychology, which shapes how I think about the projects I build, not just the code, but the user behavior and business logic behind it. Certified in Google Ads Search, Google Analytics, and Microsoft 365 SMB Sales. How I Work Every project starts with real scoping, not a generic quote. If something sits outside my direct experience, I say so upfront and propose a way to bridge it responsibly, whether that's a smaller first milestone to prove capability or an honest caveat before we commit. I'd rather lose a bid on transparency than win one on an inflated claim and disappoint a client six weeks in. What You Get Clean, maintainable code. Realistic timelines. Direct communication throughout, no disappearing between milestones. And a developer who treats "I don't know that platform yet, but here's how I'd approach learning it responsibly" as a legitimate answer, not something to hide. If it's technically achievable, I can build it, and I'll tell you plainly if it isn't. less -
Hire CorranForce
CorranForce CorranForce
$70 USD / hour
Web & Mobile Apps | Servers, AI & CybersecurityUnited StatesYour processes shouldn't be slow, manual, or expensive! Most projects don't fail from bad ideas — they fail between the idea and the execution: the prototype that never ships, the automation that breaks in week two, the app that works but nobody can maintain. We exist to close that gap. 🤖 AI & Automation AI...Your processes shouldn't be slow, manual, or expensive! Most projects don't fail from bad ideas — they fail between the idea and the execution: the prototype that never ships, the automation that breaks in week two, the app that works but nobody can maintain. We exist to close that gap. 🤖 AI & Automation AI features built into real products: chatbots, assistants, document processing, predictive tools Business automation with GPT, n8n, Make & Zapier — repetitive work, eliminated Automated trading systems for Forex and crypto (MT4/5, NinjaTrader, Pine Script) 💻 Web & Mobile Engineering Web applications with modern, scalable architecture — from MVP to production Cross-platform iOS & Android apps (React Native, Flutter) Responsive websites with brand-consistent UI/UX 2D/3D games for web, mobile, and desktop (Unity, Unreal Engine) 🏢 Business Systems & Data ERP & CRM implementation tailored to your operations (Odoo specialists — custom modules, reports, integrations) Interactive Power BI dashboards fed by automated data pipelines Document workflow automation across Microsoft Office — templates, macros, scripting 🎨 Design & Publishing Product design from wireframe to polished interface Book design: covers, illustrations, and print/digital formats for Amazon KDP, IngramSpark, EPUB & PDF ✅ How we work: every project gets a written scope, staged milestones, and source code + documentation at handover. We build things you own and can maintain — not black boxes that keep you dependent. Whether you're a startup shipping your first product or an established business drowning in manual work — tell us what you're trying to build, and we'll break down exactly how we'd deliver it. less -
Hire cliftonc20
I help businesses automate workflows and save time using AI. I build custom GPT-powered chatbots, document processing tools, and automation systems that reduce manual work and improve efficiency. Whether you need a chatbot for your website, AI-powered data processing, or workflow automation, I can deliver a reliable...I help businesses automate workflows and save time using AI. I build custom GPT-powered chatbots, document processing tools, and automation systems that reduce manual work and improve efficiency. Whether you need a chatbot for your website, AI-powered data processing, or workflow automation, I can deliver a reliable solution quickly. What I can build for you: • AI chatbots (customer support, FAQ, internal tools) • Document Q&A systems (PDF, CSV, knowledge base) • GPT-powered automation workflows (Zapier / Make) • Custom backend APIs using Python and FastAPI Tech stack: Python • OpenAI (GPT-4/5) • FastAPI • Zapier / Make • REST APIs • PostgreSQL Why work with me: • Fast delivery and clear communication • Focus on business results, not just code • Clean, scalable, and production-ready solutions Let’s build something that saves you time and grows your business. less -
Hire Joya1996
I have been in the website development, digital marketing, and AI automation field for the last 8+ years. Over the years, I've developed expertise in the following areas: CMS (Content Management System) CSS WooCommerce WooCommerce Redesign Dropshipping eCommerce Elementor Figma Google PageSpeed Insights HTML Page...I have been in the website development, digital marketing, and AI automation field for the last 8+ years. Over the years, I've developed expertise in the following areas: CMS (Content Management System) CSS WooCommerce WooCommerce Redesign Dropshipping eCommerce Elementor Figma Google PageSpeed Insights HTML Page Speed Optimization PSD to HTML PSD2CMS Shopify Shopify Development Shopify Redesign Shopify Templates Squarespace Web Design Web Development Web Services Webflow Website Build Website Design Website Development Website Maintenance Website Bug Fixing Wix WordPress WordPress Design WordPress Redesign WordPress Multilingual WordPress Plugin Laravel React Vue Node Angular PHP Local SEO Technical SEO Ecommerce SEO Keyword Research Google Ads Meta Ads TikTok Ads Google Merchant Center Google Analytics (GA4) Google Tag Manager Google Search Console Google Business Profile Meta Business Manager Meta Pixel Social Media Management Content Writing Lead Generation Graphic Design Logo Design Adobe Photoshop Banner Design UI/UX Design AI Chatbot Development Business Automation My approach is results-oriented, and I stay current with the latest trends and updates. Regardless of your website’s current state, I’ll enhance its appearance and functionality. With my marketing strategies, I’ll ensure your site visitors convert into loyal customers quickly. Click the "HIRE ME" button on the right to begin transforming your vision into reality. less -
Hire Webtechfusion23
Webtechfusion23 Webtechfusion23
$30 USD / hour
✅Full-Stack Web Developer | 12 years of ExperiencePakistanI am a Full-Stack Web Developer with 12 years of experience in (𝗣𝗛𝗣, 𝗟𝗮𝗿𝗮𝘃𝗲𝗹,𝗖𝗼𝗱𝗲𝗶𝗴𝗻𝗶𝘁𝗲𝗿 & 𝗪𝗣) . I have successfully served more than 1,000 businesses through various freelancing platforms like Upwork and Fiverr. I absolutely love making software that helps businesses work better and smarter. It's like giving...I am a Full-Stack Web Developer with 12 years of experience in (𝗣𝗛𝗣, 𝗟𝗮𝗿𝗮𝘃𝗲𝗹,𝗖𝗼𝗱𝗲𝗶𝗴𝗻𝗶𝘁𝗲𝗿 & 𝗪𝗣) . I have successfully served more than 1,000 businesses through various freelancing platforms like Upwork and Fiverr. I absolutely love making software that helps businesses work better and smarter. It's like giving them a superpower! 𝗠𝗬 𝗦𝗘𝗥𝗩𝗜𝗖𝗘𝗦: ✔️Web based Enterprise Resource Planning (ERP) Software ✔️Web based Content Management Systems (CMS) ✔️Web based Inventory Management Systems ✔️Web based Accounting Management Systems ✔️Web Data Analytics Dashboards ✔️API Development ✔️Web Scraping ✔️Wordpress Website development ✔️Ecommerce/WooCommerece ✔️Web Security ✔️Payment integration (Paypal, Stripe, Visa, Master) ✔️Mobile App development ✔️Graphic Designing ✔️AI Automation 𝗠𝗬 𝗦𝗞𝗜𝗟𝗟𝗦 : Core PHP | MVC | CodeIgniter | Laravel | JavaScript | Wordpress | HTML5 | CSS 3 | jQuery | AJAX | MySQL | MySQLi | React JS | Node JS | Firebase | Cronjob | Cake PHP | FireStore | MongoDB | Cpanel | Web Security | Elementor | Divi | GPT | Chatbots | SSL | Metabase | CSV | Project Management | Ui/Ux | Figma | iOS and Android App Development | Flutter | React Native | GUI | Pulumi | Gruntworks | WIX 𝗣𝗢𝗥𝗧𝗙𝗢𝗟𝗜𝗢 ⭐⭐⭐⭐⭐ ERP System: https://demopump.munshei.pk Gaming & Gifts: https://bonustienda.com/app WooCommerace: https://sandalirasoterra.it/ Dropshipping: https://petsplanetcare.com/ Shopify:https://trustedpetproducts.com/ WooCommerace: https://joypack.com.mx/product-category/experiencias/ Customize Cart Plugin: https://noblendy.com/cart-2/ Wordpress Website for Movers: https://brightprofessionalmovers.com/ Traverls & Tours: https://pericoripiaotours.com/home-new/ Health & Care: https://atriohomecare.org/ Thank you Regards, Aftab Ahmad Full Stack Developer less -
Hire smitk9999
With 8+ years of experience as a Senior Software Engineer, I help businesses build scalable, secure, and modern digital products across web, mobile, desktop, cloud, AI, FinTech, blockchain, and automation platforms. My background covers full-stack development, software architecture, backend systems, databases, cloud...With 8+ years of experience as a Senior Software Engineer, I help businesses build scalable, secure, and modern digital products across web, mobile, desktop, cloud, AI, FinTech, blockchain, and automation platforms. My background covers full-stack development, software architecture, backend systems, databases, cloud infrastructure, API integrations, DevOps, security, UI/UX, automation, and AI-powered solutions. I’ve worked with startups, agencies, and growing companies to deliver production-ready systems that are reliable, maintainable, and built for long-term growth. My core expertise includes: • JavaScript, TypeScript, HTML5, CSS, AJAX, React, Next.js, Angular, Vue • C#, .NET / .NET Core, ASP.NET, MVC, PHP, Python, Django, Java, C/C++ • MySQL, PostgreSQL, SQL Server, MongoDB, SQLite, SQL • REST APIs, API Development, API Integration, GraphQL, Microservices • AWS, Azure, Linux, Windows Server, VPS, Docker, Terraform, CI/CD, Git • WordPress, Shopify, Magento, Web Design, UI/UX, SEO • React Native, Flutter, Android, iOS, Desktop App Development • OpenAI, ChatGPT, Azure OpenAI, LLMs, AI Agents, MCP, Machine Learning • n8n, Make.com, Chatbots, AI Integration, AI App Development • Blockchain, Ethereum, Solidity, Smart Contracts, DApps, Web3.js, MetaMask • FinTech, Payment Gateway Integration, Payment Processing, Financial Software • MetaTrader 4/5, MQL5, TradingView, Trading Bots, Algorithmic Trading • Unreal Engine, Roblox, Lua, Game Development and Game Optimization • Web Security, Cloud Security, Cryptography, Data Processing and Automation I also have strong experience leading projects and collaborating with teams — from requirements analysis and architecture planning to Agile development, code reviews, documentation, deployment, security, and mentoring developers. Recently, I’ve been working extensively with AI agents, LLM integrations, MCP-based workflows, automation systems, FinTech solutions, blockchain applications, and trading platforms that connect AI and software with real-world APIs, databases, payment systems, and business tools. I focus on writing clean, maintainable code and building solutions that solve real business problems — whether it’s a SaaS platform, AI application, eCommerce platform, automation system, FinTech product, blockchain app, trading system, mobile app, desktop application, game, dashboard, or enterprise backend. I value clear communication, dependable delivery, and long-term professional relationships. Let’s build something great together. less -
Hire MinaMaroufIt
I build custom software solutions for startups, growing businesses, and modern companies that need reliable, scalable, and results-driven technology. With 7+ years of experience, I help clients create and improve digital products across AI, SaaS, web, mobile, eCommerce, automation, and backend systems. I support...I build custom software solutions for startups, growing businesses, and modern companies that need reliable, scalable, and results-driven technology. With 7+ years of experience, I help clients create and improve digital products across AI, SaaS, web, mobile, eCommerce, automation, and backend systems. I support projects from planning and architecture to development, testing, deployment, and ongoing improvement. Here are my key skills: ✔️ AI & LLM Development | AI Applications | Prompt Engineering | Intelligent Automation | AI Workflows ✔️ SaaS Platform Development | Scalable Architecture | Multi-tenant Systems | Admin Panels | Subscription Systems ✔️ Full-Stack Development | Web Applications | Frontend & Backend | REST APIs | Responsive Systems ✔️ Backend Engineering & System Design | API Development | Microservices | Database Design | System Architecture ✔️ Automation & Workflow Optimization | Business Automation | Process Optimization | API Integrations ✔️ eCommerce Solutions | Shopify | WooCommerce | WordPress | Custom Integrations ✔️ Performance Optimization | Debugging | Bottleneck Fixing | Code Refactoring | System Stability ✔️ Cloud & Deployment | AWS | Scalable Hosting | Deployment Pipelines ✔️ Third-Party Integrations | Payment Gateways | CRMs | External APIs | Webhooks ✔️ Dashboards & Admin Systems | Reporting Tools | Analytics Dashboards | Internal Systems ✔️ Product Development Lifecycle | MVP Development | Testing | Deployment | Scaling ✔️ Code Quality & Maintainability | Clean Code | Documentation | Long-Term Scalability I help clients launch faster, automate workflows, and build dependable products that scale. I believe strong products come from clear communication, practical engineering, and consistent execution. My goal is to deliver solutions that are not only functional but dependable, maintainable, and ready for real business growth. less -
Hire abhishek2323
Certified WordPress & Shopify Developer | Themes, Plugins, SEO & Content I’m a certified WordPress and Shopify developer with 10+ years of experience building secure, scalable, responsive, and high-performing websites. I have delivered 100+ WordPress websites, developed 50+ custom WordPress plugins, and created 50+...Certified WordPress & Shopify Developer | Themes, Plugins, SEO & Content I’m a certified WordPress and Shopify developer with 10+ years of experience building secure, scalable, responsive, and high-performing websites. I have delivered 100+ WordPress websites, developed 50+ custom WordPress plugins, and created 50+ Shopify stores. I provide complete website solutions, including development, customization, SEO, content writing, performance optimization, migration, maintenance, and integrations. 🔹 WordPress Development I can handle almost every type of WordPress project, including: ✔ Custom WordPress website development ✔ Custom theme and child theme development ✔ Custom plugin development and modification ✔ Plugin bug fixing and feature enhancement ✔ WooCommerce development and customization ✔ Custom post types, taxonomies, and fields ✔ REST API and third-party integrations ✔ Payment gateway and CRM integrations ✔ Membership, LMS, booking, directory, and marketplace websites ✔ Website migration, maintenance, security, and upgrades ✔ Elementor, Gutenberg, and WPBakery ✔ Figma, PSD, and HTML to WordPress conversion I work with PHP, JavaScript, HTML5, CSS3, MySQL, AJAX, JSON, and REST APIs. I write clean, secure, and scalable code. 🔹 Shopify Development I have developed and customized 50+ Shopify websites. My services include: ✔ Complete Shopify store development ✔ Shopify theme development and customization ✔ Custom sections, pages, and templates ✔ Product and collection setup ✔ App, payment, and shipping integrations ✔ Store redesign and migration ✔ Speed and mobile optimization ✔ Conversion-focused landing pages ✔ Shopify SEO and maintenance 🔹 SEO & Backlink Services I provide Hosting services, Fix hosting System. ✔ Keyword research ✔ On-page and technical SEO ✔ Meta titles and descriptions ✔ Content, heading, image, and internal-link optimization ✔ Off-page SEO and backlink building ✔ Guest posting and directory submissions ✔ Competitor backlink analysis ✔ Local SEO and citation building I follow safe SEO practices and avoid spammy backlinks. 🔹 Content & Blog Writing I create original, engaging, and SEO-friendly content, including: ✔ Blog posts and articles ✔ Website and service-page content ✔ Product descriptions ✔ Landing-page and business content ✔ Technical content ✔ Content rewriting and proofreading ✔ Keyword-focused SEO content 🔹 Why Work With Me? ✅ 10+ years of professional experience ✅ 100+ WordPress websites delivered ✅ 50+ custom plugins developed ✅ 50+ Shopify stores completed ✅ WordPress, Shopify, SEO, backlinks, and content in one place ✅ Clean, secure, and scalable work ✅ Clear communication and on-time delivery ✅ Short-term and long-term availability Let’s Build Something Great 🚀 Whether you need a WordPress website, Shopify store, custom theme, plugin, WooCommerce solution, SEO campaign, backlinks, or professional content, I’m ready to help. Send me a message to discuss your project. less
