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 512 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 512 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, 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 vasundhara19
We help startups and growing businesses build AI-powered SaaS platforms, mobile apps, and web applications, from MVP to scale, with a focus on speed, performance, and real business outcomes. With 13+ years of experience and 500+ successful projects delivered, we don’t just develop software, we build products that are...We help startups and growing businesses build AI-powered SaaS platforms, mobile apps, and web applications, from MVP to scale, with a focus on speed, performance, and real business outcomes. With 13+ years of experience and 500+ successful projects delivered, we don’t just develop software, we build products that are designed to grow, handle scale, and deliver measurable impact. 🔹 Proven Results ➜ 500+ applications delivered globally ➜ MVPs launched in 30–45 days ➜ Apps scaled to 100K+ users ➜ AI solutions reducing manual work by up to 40% ➜ 4.9★ rating across 170+ client reviews 🔹 What We Do Best SaaS & MVP Development ➜ MVP development (idea → launch) ➜ Multi-tenant SaaS platforms ➜ Subscription & billing systems ➜ Admin dashboards & analytics ➜ Scalable backend architecture Mobile & Web App Development ➜ Flutter apps (iOS & Android) ➜ React Native cross-platform apps ➜ High-performance web applications ➜ App deployment & optimization AI-Powered Solutions ➜ AI-integrated web & mobile apps ➜ Chatbots & AI assistants ➜ LLM-based solutions (RAG, automation) ➜ Intelligent workflows & automation 🔹 Tech Stack ➜ Frontend: React.js, Next.js, Angular, Vue.js ➜ Backend: Node.js, Python (Django), Laravel ➜ Mobile: Flutter, React Native, Swift, Kotlin ➜ Databases: PostgreSQL, MySQL, MongoDB ➜ Cloud: AWS, Docker, DigitalOcean ➜ AI: LLMs, RAG pipelines, automation tools 🔹 Why Clients Work With Us ➜ MVPs delivered in 30-60 days ➜ Built for scale from day one (no rebuild later) ➜ Focus on business outcomes, not just code ➜ Clean, maintainable, production-ready systems ➜ Clear communication & daily updates ➜ Long-term support & product growth 🔹 Industries We Serve ➜ SaaS & Startups ➜ FinTech & Healthcare ➜ E-commerce & Marketplaces ➜ Logistics & Transportation ➜ Education & Fitness ➜ AI-driven platforms 🔹 We Are a Great Fit If You: ➜ Want to launch your MVP quickly and correctly ➜ Need to scale an existing product ➜ Want to integrate AI into your business ➜ Care about long-term product quality 🔹 Not the Right Fit If: ➜ You are looking for the cheapest option ➜ You need quick, low-quality solutions ➜ Budget is your only decision factor 🔹 What You Can Expect ➜ Transparent communication & daily updates ➜ Strong ownership of your project ➜ On-time delivery with proper QA ➜ Scalable, future-ready architecture ➜ Ongoing support after launch 🔹 Let’s Build Something That Scales If you're looking to build: ➜ AI-powered SaaS platform ➜ Mobile app (Flutter / React Native) ➜ Web application ➜ Startup MVP Send us a message or invite us to your project. Let’s turn your idea into a scalable, successful product. less -
Hire vladang
I’m a Senior Software Engineer with 10+ years of experience building secure, scalable, and high-performance web, mobile, and AI-powered applications that solve real business problems and drive measurable results. I specialize in end-to-end development — from planning and architecture to deployment, optimization, and...I’m a Senior Software Engineer with 10+ years of experience building secure, scalable, and high-performance web, mobile, and AI-powered applications that solve real business problems and drive measurable results. I specialize in end-to-end development — from planning and architecture to deployment, optimization, and long-term support. Whether you need a modern website, SaaS platform, mobile app, AI-powered solution, eCommerce store, custom CMS, API integration, automation workflow, or enterprise application, I deliver reliable, scalable, and future-ready solutions tailored to your goals. My expertise includes: • Frontend: React.js, Next.js, Vue.js, Nuxt.js, Angular, TypeScript, JavaScript, Tailwind CSS, shadcn/ui, responsive UI/UX, performance optimization. • Backend: Node.js (Express, NestJS), Python (Django, Flask, FastAPI), PHP (Laravel), C# (.NET), REST APIs, GraphQL, microservices, authentication, real-time systems. • Mobile: React Native, Flutter, Native Android (Java/Kotlin). • WordPress & CMS: WordPress, WooCommerce, Elementor, Gutenberg, ACF, custom themes/plugins, Sanity, Strapi, Contentful, Payload CMS, Directus, Storyblok, Builder.io, and headless CMS architectures. • Shopify & eCommerce: Shopify, Shopify Plus, Liquid, Hydrogen/Oxygen, custom apps, WooCommerce, Stripe, PayPal, subscriptions, and conversion-focused stores. • AI & Automation: OpenAI GPT, Claude, LangChain, Llama, RAG, AI chatbots, intelligent workflows, automation, and custom AI solutions. • Cloud & DevOps: PostgreSQL, MySQL, MongoDB, Firebase, Supabase, Docker, CI/CD, AWS, Azure, GCP, Vercel, and scalable cloud infrastructure. I focus on building clean, maintainable, and business-focused solutions with strong communication, reliable delivery, and attention to detail. From startups and MVPs to enterprise systems and long-term product development, I help turn ideas into scalable, high-quality products. If you’re looking for an experienced expert who can handle everything from modern web platforms and mobile apps to AI integrations, WordPress, Shopify, CMS development, and complex custom solutions — let’s build something exceptional. less -
Hire flapjakc
MapleStack builds fast, reliable web and mobile applications end to end - from architecture through launch. What sets us apart: Full-stack range - 8+ years across SaaS platforms, e-commerce, and AI-integrated web apps. Core stack: WordPress, WooCommerce, Shopify, PrestaShop, Laravel, Node.js, React, and Next.js,...MapleStack builds fast, reliable web and mobile applications end to end - from architecture through launch. What sets us apart: Full-stack range - 8+ years across SaaS platforms, e-commerce, and AI-integrated web apps. Core stack: WordPress, WooCommerce, Shopify, PrestaShop, Laravel, Node.js, React, and Next.js, plus REST API integrations, payment gateways, headless CMS, and custom CRMs. Business-first approach - With a Bachelor of Commerce (Marketing) and a BSc in Psychology, we understand user behavior and business strategy, not just code. Certified professional - Google Ads Search Certified, Google Analytics Qualified, and Microsoft 365 SMB Masters Sales Professional. Speed and quality - We deliver quickly and aim to exceed expectations on every build, with clean, maintainable code. If it's technically possible, we can build it - from your first idea to a live product. 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 anirudhat
I build clean, functional solutions fast across the full stack. Specializing in: - Web: React, Next.js, Node.js, Python, PHP, Ruby on Rails, Golang, Laravel, Django, WordPress, Vue.js - Mobile: React Native, Flutter, Android (Kotlin), iOS (Swift), Dart - AI & Machine Learning: LLM integrations (Claude, OpenAI,...I build clean, functional solutions fast across the full stack. Specializing in: - Web: React, Next.js, Node.js, Python, PHP, Ruby on Rails, Golang, Laravel, Django, WordPress, Vue.js - Mobile: React Native, Flutter, Android (Kotlin), iOS (Swift), Dart - AI & Machine Learning: LLM integrations (Claude, OpenAI, Gemini), RAG pipelines, LangChain, vector databases, prompt engineering, chatbots, NLP, OCR, generative AI - APIs & Integrations: REST, GraphQL, payment gateways (Stripe, PayPal, Razorpay), Twilio, SendGrid, third-party services - Cloud & DevOps: AWS, Azure, Docker, Kubernetes, Jenkins, CI/CD, Nginx, Linux server administration, Cloudflare - E-commerce & CRM: WooCommerce, OpenCart, Magento, Odoo, Prestashop, Point of Sale systems - Databases: MySQL, PostgreSQL, MongoDB, MariaDB, Elasticsearch, SQLite, Redis, Microsoft SQL Server - Trading & Finance: MetaTrader 4/5, MQL4/5, Pine Script, NinjaTrader, OpenClaw, backtesting, trading bots - Data & Automation: Excel/Google Sheets automation, dashboards, data analysis, workflow automation I focus on understanding your requirements clearly, delivering working code, and communicating progress throughout. 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 TechnoTweak
Techno Tweak is a full-service digital technology company helping businesses turn ideas into high-performing websites, applications, software, eCommerce platforms, and digital experiences. We don’t believe in overwhelming clients with endless technology names. We focus on understanding your goals, choosing the right...Techno Tweak is a full-service digital technology company helping businesses turn ideas into high-performing websites, applications, software, eCommerce platforms, and digital experiences. We don’t believe in overwhelming clients with endless technology names. We focus on understanding your goals, choosing the right technology, and delivering a solution that is fast, scalable, secure, and easy to use. 🌐 Web & eCommerce We design and develop business websites, high-converting landing pages, eCommerce stores, SaaS platforms, marketplaces, portals, and custom web applications using WordPress, WooCommerce, Shopify, Webflow, Wix, Squarespace, PHP, Laravel, React, Next.js, Node.js, Vue.js, and more. 📱 Mobile & Software Development From customer-facing mobile apps to complete business systems, we build iOS, Android, cross-platform, and custom software solutions. Our expertise includes React Native, Flutter, Swift, Kotlin, Python, Django, APIs, databases, CRM, ERP, POS, LMS, booking, inventory, and management systems. 🎨 UI/UX & Creative Design We create modern, conversion-focused digital experiences through Figma, UI/UX design, wireframes, prototypes, branding, logos, illustrations, social media designs, brochures, banners, animations, motion graphics, and marketing creatives. 🎬 Creative, Video & Motion Design We create professional visual content that helps businesses communicate and stand out from video editing and production to motion graphics, After Effects, Adobe Premiere Pro, 2D/3D animation, logo animation, explainer videos, social media videos, and promotional content. 🤖 AI & Automation We help businesses use AI to save time and create better experiences through AI chatbots, AI agents, OpenAI integrations, generative AI, computer vision, intelligent automation, custom AI applications, n8n, Zapier, and API-based workflows. 🔗 Integrations & Business Automation Connect your tools and eliminate repetitive work. We integrate payment gateways, CRMs, ERPs, marketing platforms, communication tools, analytics, maps, cloud services, and third-party APIs including Stripe, PayPal, Twilio, Google APIs, HubSpot, Zoho, Odoo, Xero, Airtable, and more. ☁️ Cloud, Hosting & Performance We handle deployment, hosting, cloud infrastructure, databases, security, monitoring, and optimization using AWS, Azure, Google Cloud, Docker, Linux, Nginx, Cloudflare, MySQL, PostgreSQL, MongoDB, and other technologies. 🚀 SEO, Marketing & Growth A great website needs visibility and performance. We provide technical SEO, SEO audits, on-page optimization, local SEO, Google Ads, analytics, conversion optimization, content marketing, email marketing, social media marketing, and site speed. 🛡️ Testing & Ongoing Improvement We test and optimize websites, applications, APIs, and mobile products for performance, usability, accessibility, security, compatibility, and reliability. Have a project in mind? Send us your requirements, and let’s turn your idea into reality. less -
Hire smitk9999
With 8+ years of experience as a Senior Software Engineer, I help businesses build scalable, reliable, and modern digital products across web, mobile, desktop, cloud, and AI-driven platforms. My background covers full-stack development, backend architecture, cloud infrastructure, API integrations, automation, and...With 8+ years of experience as a Senior Software Engineer, I help businesses build scalable, reliable, and modern digital products across web, mobile, desktop, cloud, and AI-driven platforms. My background covers full-stack development, backend architecture, cloud infrastructure, API integrations, automation, and AI-powered solutions. I’ve worked with startups, agencies, and growing companies to develop production-ready systems that are fast, maintainable, and built for long-term growth. My core expertise includes: • C#, .NET / .NET Core, ASP.NET MVC, Web API • Angular, React.js, Next.js, Vue.js, TypeScript, JavaScript • SQL Server, PostgreSQL, MySQL, MongoDB, SQLite • AWS, Azure, Docker, CI/CD, Linux, Nginx, IIS • REST APIs, GraphQL, Microservices, Payment Integrations • WordPress, Magento, CMS Development • Mobile Development with React Native and Flutter • AI & Automation using OpenAI, ChatGPT, Gemini, MCP, n8n, Make.com • Blockchain & Web3 technologies including Solidity, Ethereum, Solana, Smart Contracts, DApps • Data Scraping, Automation, Dashboards, Power BI, Airtable, Google APIs I also have strong experience leading projects and collaborating with teams — from planning architecture and reviewing code to mentoring developers and delivering high-quality software on time. Recently, I’ve been working with AI agents, LLM integrations, and MCP-based workflows, helping businesses connect AI systems with real-world tools, APIs, databases, and business logic in practical and scalable ways. I focus on writing clean, maintainable code and building solutions that solve real business problems — whether it’s a SaaS platform, automation system, AI application, eCommerce platform, internal 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
