Hire the Best PayPal Integration Specialists
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I build complex WordPress and WooCommerce platforms that go far beyond basic theme setup. My focus is custom WordPress development, WooCommerce architecture, custom plugins, API integrations, Stripe payments, ERP integrations, booking systems, e-learning platforms, AI-powered features, and internal workflow automation. I can help you with: • Custom WooCommerce stores and large product catalogs • WooCommerce checkout, payment, delivery, and order logic • Stripe, Apple Pay, Google Pay, and custom payment flows • Custom WordPress plugin development • ACF-based WordPress architecture • REST API integrations with third-party services • ERP, delivery, marketplace, and CRM integrations • Custom admin panels and internal workflow automation • Booking systems, user dashboards, and client portals • E-learning platforms and subscription-based platforms • AI-powered search, translation, and automation features • REST APIs for mobile apps and external websites • Performance optimization and production fixes Recent WordPress projects I worked on include: • A WooCommerce store with 5,000+ SKUs, payment integrations, delivery APIs, ERP sync, B2B automation, marketplace synchronization, and AI-powered product search • A custom WordPress learning platform with user accounts, lesson scheduling, Stripe subscriptions, custom admin tools, AI translations, text-to-speech, pronunciation scoring, video lesson integrations, and mobile API • A custom booking platform with Stripe payments, flight tracking, holiday-based pricing logic, user dashboard, admin management tools, and external API for connecting other websites My core stack includes WordPress, WooCommerce, PHP, ACF, JavaScript, REST API, Stripe, PostgreSQL, MySQL, React, Next.js, Node.js, Cloudflare, Vercel, and Linux-based deployment environments. What makes me different is that I do not just install themes and plugins. I build custom business logic, integrations, admin workflows, and production-ready systems that are stable, maintainable, and designed for real operations. I can take ownership of the full development process: planning, architecture, backend logic, frontend implementation, API integrations, testing, deployment, and post-launch fixes. If you need a WordPress/WooCommerce developer who can handle complex functionality, custom integrations, and production-level development, I can help you build it properly.

With over 15 years of web development experience, I have strong expertise in the development of online marketplaces and E-Commerce applications. Aside of the fully custom implementations I have worked with the following multivendor platforms : • Sharetribe Go • Sharetribe Flex ( vetted partner of Sharetribe ) • WordPress + WooCommerce • CS-Cart Multivendor • Medusa js • Mailchimp Open Commerce ( formerly - Reaction Commerce ) Payment gateways experience : • Stripe • Paypal • Adyen • Mangopay • Paystack Programming languages and frameworks: • Ruby ( Ruby on Rails ) • JavaScript ( Node js, React js, Vue js ) • PHP ( WordPress ) Databases: • MySQL ( former employee of MySQL AB ) • PostgreSQL • Oracle I have the real life experience and necessary personal skills to succeed in a competitive environment and to sell high value solutions in a consultative manner. It allows me to propose our solutions: ✔️ Rapid MVP development from scratch in tight deadline and shoestring budget ✔️ Open source cost-efficient custom Marketplace tailored to your needs ✔️Project, Service, Booking or hybrid type marketplace development I know the pitfalls and difficulties awaiting and know how to avoid them to skyrocket your project, test the market, gain feedback and find investors (in case you are looking for them).

Payment bugs and failed webhooks cost you real revenue. I build and fix payment flows that reconcile to the cent: Stripe integrations, subscriptions and billing, invoicing, card processing, bank APIs. 10+ years of backend engineering (Node.js, TypeScript, PostgreSQL), currently a team lead at a fintech company processing millions of transactions. $100K+ earned on Upwork, 100% Job Success, including two 6-year contracts with the same clients Senior full-stack engineer with $100K+ earned on Upwork, 4,300+ hours, and a 100% Job Success Score. I ship and stabilize production web systems—from urgent Vue/Nuxt/React frontend work to Node.js APIs, PostgreSQL, payment flows, and AI integrations. I’m a strong fit when you need: • a production bug fixed without destabilizing an existing codebase • a responsive landing page or frontend implemented from Figma • a Node.js/TypeScript API or third-party integration • payment, transaction, invoicing, or fintech business logic • an n8n or OpenAI/Claude workflow engineered with retries, validation, and safe failure handling My Upwork history includes long-running full-stack products, complex frontend animation, and quick delivery on focused frontend tasks. Clients have specifically highlighted speed, reliability, and the ability to get difficult UI work right the first time. Core stack: Node.js, TypeScript, JavaScript, PostgreSQL, Vue.js, Nuxt, React, NestJS, REST APIs, Docker, payment integrations, n8n, and OpenAI/Claude APIs. Send me the current codebase, design, or production issue, and I’ll give you a direct assessment of the solution, risks, and realistic delivery time.

I help businesses fix, optimize, secure, and extend WordPress & WooCommerce websites — especially when standard themes and plugins are not enough. My strongest experience is with WooCommerce stores, custom plugins, checkout/payment issues, API integrations, performance optimization, security hardening, and server-level troubleshooting. With 10+ years of experience, I work with business owners, agencies, and growing eCommerce companies that need reliable technical solutions, not temporary fixes. 🔧 What I can help with: • Custom WordPress & WooCommerce development • Custom plugins, PHP, hooks, filters, ACF, CPT • WooCommerce checkout, cart, payment, shipping, and order workflows • Stripe, PayPal, Authorize.Net, Square, and payment gateway troubleshooting • API integrations, REST APIs, webhooks, Telegram bots, and business automation • Product imports, CSV/XML/API synchronization, and WP All Import • B2B pricing, approval systems, and custom WooCommerce logic • WooCommerce POS, large catalog, and performance optimization • Core Web Vitals, caching, Redis, database, and speed optimization • WordPress security hardening, malware cleanup, and REST API protection • VPS, Docker, Ubuntu, Nginx, MariaDB, Redis, Cloudflare, and SSL setup • Website migrations, staging setup, plugin conflicts, and production troubleshooting 💼 Recent project experience: • Maintained and optimized a large WooCommerce store with 20,000+ products • Built custom WooCommerce plugins and business workflows • Optimized WooCommerce POS performance for a large product catalog • Built a custom SMS/MMS CRM with Telegram and VoIP.ms integration • Configured B2B pricing and approval workflows with WooCommerce/B2BKing • Implemented secure checkout/compliance logic for WooCommerce orders • Fixed payment, checkout, API, email, SMTP, and plugin conflict issues • Deployed WordPress on Docker-based VPS infrastructure with Nginx, Redis, MariaDB, SSL, and Cloudflare ⚡ My approach: I focus on finding the real cause of technical problems, building clean solutions, and making sure the website remains stable, fast, secure, and easy to maintain. Whether you need WooCommerce development, custom WordPress functionality, API integrations, performance optimization, security fixes, server setup, or long-term technical support — I can help you build a reliable solution.

Experts in API Integration and Integration Architecture for complex business systems. When business systems must exchange data reliably, simple API connections are rarely enough. We design and build production-grade API integrations connecting ERP, CRM, e-commerce platforms, and internal systems - focusing on reliability, observability, and long-term maintainability. Our work centers on custom integrations that support real business operations, not fragile scripts or quick automation hacks. 🧩 What We Do 🔹 API Integration & System Connectivity Design and implementation of reliable API integrations between ERP, CRM, e-commerce, marketing, and internal systems using REST APIs, webhooks, and secure authentication. 🔹 Integration Architecture Design of robust integration architectures including data synchronization strategies, retry logic, monitoring, error handling, and long-term maintainability. 🔹 On-premise Integration Platforms Custom API integration hubs deployed on your infrastructure (Laravel / PHP), including scheduling, logging, monitoring, and full operational control. 🔹 API Development & Consulting End-to-end API development: REST API design, OAuth authentication, webhook processing, multi-system integration strategies, system audits, and integration consulting. 🔹 Data Synchronization Reliable data pipelines between ERP, CRM, analytics, and internal systems with validation, monitoring, and recovery mechanisms. ⚙️ Our Strengths ✅ Strong focus on API integration for complex business workflows (finance, e-commerce, logistics, marketing operations) ✅ Production reliability by default - logging, retries, monitoring, and alerts included ✅ Security-first architecture suitable for on-premise and private cloud deployments ✅ End-to-end ownership - from architecture and API development to deployment and long-term support 🧠 Tech Stack Languages & Frameworks: Laravel / PHP / Node.js / Python Integration Technologies: REST APIs, Webhooks, OAuth, event-driven integrations Platforms & APIs: HubSpot, QuickBooks Online, Xero, Shopify, Acumatica, BigCommerce, Airtable, Slack, Notion, Google Workspace Infrastructure: AWS, DigitalOcean, Docker, Linux 🌟 Why Clients Choose QPMSoft 💼 $400K+ earned on Upwork | 100% Job Success | 10+ years building integration systems 🤝 Clear communication, fast response times, and realistic expectations 🚀 Flexible engagement models - from focused API integrations to long-term integration platforms Whether you need API Integration, custom API Development, or reliable system integrations between ERP, CRM, and e-commerce platforms, we focus on building systems that are stable, maintainable, and production-ready.

I help businesses build, fix, and scale WordPress & WooCommerce websites — from custom themes to complex API & payment integrations. ✔ Custom WordPress themes (Figma → Pixel-perfect) ✔ WooCommerce & payment gateway integrations (PayDo, API, webhooks) ✔ Malware removal & security hardening ✔ Performance optimization & bug fixing I worked as a Tech Lead at PayDo, building real payment systems and production-level plugins