Hire the Best PayPal Integration Specialists
in Bangladesh

Built backend automation platforms processing 1M+ webhook events per month and integrating services such as Shopify, Google Sheets, Mailchimp, Twilio, and custom APIs. I help startups and SaaS companies automate workflows, synchronize data between platforms, and build scalable backend systems using Laravel, Node.js, PostgreSQL, Redis, and modern cloud infrastructure. With 10+ years of software development experience, I specialize in API integrations, webhook processing, queue-based architectures, and business automation systems that operate reliably at scale. 𝐖𝐇𝐀𝐓 𝐈 𝐃𝐎 𝐒𝐚𝐚𝐒 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 & 𝐀𝐏𝐈 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 ● Laravel, Node.js (NestJS, Express) backend architecture ● Scalable REST APIs & secure backend systems ● Queue systems, retries, idempotency, and fault-tolerant processing ● Multi-tenant SaaS backend infrastructure ● Event-driven systems and webhook processing 𝐀𝐏𝐈 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 & 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 ● Stripe, Twilio, Google APIs, Meta APIs ● OAuth2 authentication & secure integrations ● Workflow automation and business process automation ● Multi-service data synchronization and API orchestration ● CRM and operational automation systems 𝐀𝐈-𝐏𝐨𝐰𝐞𝐫𝐞𝐝 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐖𝐨𝐫𝐤𝐟𝐥𝐨𝐰𝐬 ● AI-assisted workflow automation ● OpenAI integrations and AI-powered backend features ● OCR / image-to-text processing pipelines ● AI summarization and intelligent data processing ● Automation systems integrating AI models with business workflows 𝐂𝐨𝐦𝐩𝐥𝐞𝐱 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 ● Fintech workflows and transactional systems ● ERP and OTA (booking platform) backend systems ● Custom eCommerce backend architecture ● Scalable webhook-driven event systems ● High-volume asynchronous processing systems 𝐑𝐄𝐀𝐋 𝐏𝐑𝐎𝐉𝐄𝐂𝐓 𝐄𝐗𝐏𝐄𝐑𝐈𝐄𝐍𝐂𝐄 ● Built webhook orchestration systems processing 1M+ events/month ● Developed scalable API integration platforms with dynamic credentials ● Built queue-based systems with retries and reliable event processing ● Developed automation workflows reducing manual operations ● Built backend systems for SaaS, fintech, eCommerce, and workflow platforms 𝐒𝐄𝐋𝐄𝐂𝐓𝐄𝐃 𝐏𝐑𝐎𝐉𝐄𝐂𝐓 𝐓𝐘𝐏𝐄𝐒 ● Shopify Workflow Automation Platforms ● AI-Powered Automation Systems ● CRM & Lead Pipeline Automation ● Fintech Rewards & Cashback Platforms ● API Integration & Webhook Infrastructure ● SaaS Backend Platforms ● Custom Business Automation Tools 𝐇𝐎𝐖 𝐈 𝐖𝐎𝐑𝐊 I approach projects as systems, not isolated features. ● Analyze system flows, bottlenecks, and scalability requirements ● Design clean backend architecture for long-term maintainability ● Build reliable APIs, automations, and event-driven workflows ● Focus on stability, performance, and operational reliability ● Deliver solutions that scale with business growth 𝐂𝐎𝐑𝐄 𝐓𝐄𝐂𝐇𝐍𝐎𝐋𝐎𝐆𝐈𝐄𝐒 Backend: Laravel, Node.js, NestJS, Express.js, PHP, TypeScript, JavaScript Databases & Infrastructure: PostgreSQL, MySQL, Redis, MongoDB, Supabase Automation & AI: OpenAI, LangChain, n8n, AI workflows, OCR pipelines Integrations: Stripe, Twilio, Webhooks, OAuth2 APIs, Third-Party Services Cloud & DevOps: AWS, Docker, CI/CD, Git, Microservices Frontend (when needed): React.js, Next.js If you're building a SaaS platform, automation system, API-heavy product, or AI-integrated workflow, I can help you architect and build a reliable backend foundation that scales properly as your business grows. Laravel Developer | PHP Developer | API Integration | REST API | Webhook Development | OAuth2 | Backend Development | SaaS Development | Workflow Automation | Node.js Developer | Express.js | NestJS | PostgreSQL | MySQL | Redis | Queue Systems | Twilio API | Stripe API | OpenAI Integration | CRM Integration | Event-Driven Systems | Docker | AWS

With over 14 years of experience, I specialize in transforming complex business requirements into scalable web applications that drive real revenue growth. My expertise spans full stack development, AI integration, and payment solutions, ensuring that every project I undertake is both innovative and robust. Core Expertise & Skills Backend Development 1. PHP: Developing robust applications since 2007 2. Laravel: Building enterprise-grade applications since 2012 3. Livewire: Real-time interfaces for modern web apps 5. API Development: RESTful services handling millions of requests 6. Database Design: MySQL optimization for high-traffic systems AI & Code Auditing 1. AI-driven code verification for enhanced accuracy 2. Comprehensive code reviews to ensure quality and security 3. Migrating legacy systems to AI-driven platforms for modern business needs Payment Solutions 1. Stripe / Stripe Connect: Certified expert with 50+ marketplace integrations since 2014 2. Payment Orchestration: Designing and implementing complex payment systems 3. E-commerce: Complete online store development and optimization Frontend & UI/UX 1. WordPress: Crafting dynamic websites since 2010 2. Modern CSS: Tailwind CSS, Bootstrap responsive design 3. Figma: Mastery in creating intuitive UI/UX designs 4. JavaScript: Dynamic interfaces and real-time functionality 6. Performance: Sub-3-second load times on complex applications MCP Experience 1. Figma, WordPress, Laravel: Mastery in creating and managing complex projects Additional Technologies 1. React.js, Python, Vue.js: Proficient in understanding and coding with AI assistance Data Analysis & Visualization 1. Analytical insights for data-driven decision making 3. Creating visualizations to simplify complex data sets Enterprise Integration 1. CRM Systems: Zoho CRM, custom business workflows 2. Marketing Automation: Email sequences, customer lifecycle management 3. Third-party APIs: Google services, social authentication, AI chatbots Cloud & DevOps 1. AWS & Digital Ocean: Scalable infrastructure deployment 2. Laravel Forge: Automated deployment and server management 3. Git/GitHub: Version control and collaborative development Professional Experience 1. Built 100+ web applications across various industries 3. Specialized in SaaS platforms and e-commerce solutions 4. Led development teams and mentored junior developers 4. Consulted for Fortune 500 companies and funded startups Key Achievements 1. Generated $50M+ in client revenue through platforms I've built 2. Maintained 99.99% uptime across all production applications 3. Improved client conversion rates by 30-50% consistently 4. Recognized by Stripe as integration methodology contributor 5. My Development Approach I focus on building solutions that scale with your business growth. Every project includes: 1. Future-proof architecture designed for expansion 2. Security best practices with PCI compliance when needed 3. Performance optimization for exceptional user experience 4. Comprehensive documentation for long-term maintainability Ideal Project Types 1. SaaS application development and migration 2. E-commerce platforms with complex requirements 3. Payment system integration and optimization 4. Custom web applications for growing businesses 5. API development and third-party integrations I work best with ambitious businesses ready to invest in quality solutions that drive measurable results. Ready to discuss your project? Let's build something exceptional together.

Are you struggling to Scale your SaaS, Make it more Secure, Nail Complex Payments, or Turn an MVP Into a Product that can actually Scale? Over the last 12+ years, I've been helping startups and growing businesses build SaaS platforms, Stripe-powered products, Marketplaces, Healthcare systems, CRM, Logistics software, and AI-powered applications. Most of my work for the last 5 years revolves around SaaS Architecture, Stripe billing systems, Marketplaces, AI Integrations, Database Performance, Reporting Systems, and Multipurpose applications. On the payment side, I have worked extensively with Stripe Checkout, Payment Intents & Subscriptions, Stripe Charges, Payment Elements, ACH payments, Hold-Amount for security, Card-Authorization/Save Customer's Card for future charge, Round up for charity in checkout, EMI (equal monthly installment), Stripe Connect, Recurring billing, trials, coupons, invoicing, usage-based billing, webhooks, subscription lifecycle management, and complex revenue workflows. On the SaaS side, my core stack includes React.js, Next.js, TypeScript, Node.js, Express, MongoDB, Supabase, PHP, CodeIgniter, MySQL, Redis, AWS, Azure, and Vercel. More importantly, I understand how these technologies fit together to create products that can continue growing without becoming difficult or expensive to maintain. 𝐈 𝐜𝐚𝐧 𝐡𝐞𝐥𝐩 𝐰𝐢𝐭𝐡 ✔ SaaS architecture & Product development ✔ Stripe Integrations & Subscription Billing ✔ Stripe EMI (Equal Monthly Installment) to charge a big amount by multiple installments. ✔ Stripe Connect Marketplaces ✔ Complete online store development and optimization ✔ MVP Development & Product Scaling ✔ AI-Powered SaaS Applications ✔ Database Design, Performance Enhancement and Optimization ✔ Reporting & Analytics Platforms ✔ AI Agent Integrations Whether you're building from Scratch or improving an existing platform, implementing Stripe, Optimizing performance or preparing a product for growth, I'm here to help. Send me a message and tell me what you're building. I respond within 1 hour during US overlap.

I help startups and growing businesses build reliable 𝐒𝐚𝐚𝐬 𝐩𝐫𝐨𝐝𝐮𝐜𝐭𝐬, 𝐏𝐚𝐲𝐦𝐞𝐧𝐭 𝐬𝐲𝐬𝐭𝐞𝐦𝐬, and 𝐀𝐈-𝐩𝐨𝐰𝐞𝐫𝐞𝐝 𝐰𝐨𝐫𝐤𝐟𝐥𝐨𝐰𝐬 that are production-ready. 𝐈’𝐦 𝐚 𝐒𝐞𝐧𝐢𝐨𝐫 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫(𝒲ℯ𝒷&ℳℴ𝒷𝒾𝓁ℯ) 𝐚𝐧𝐝 𝐒𝐭𝐫𝐢𝐩𝐞/𝐏𝐚𝐲𝐦𝐞𝐧𝐭𝐬 𝐒𝐩𝐞𝐜𝐢𝐚𝐥𝐢𝐬𝐭 𝐰𝐢𝐭𝐡 $𝟏𝟓𝟎𝐤+ 𝐞𝐚𝐫𝐧𝐞𝐝 𝐨𝐧 𝐔𝐩𝐰𝐨𝐫𝐤 𝐚𝐧𝐝 𝟏𝟓𝟎+ 𝐬𝐮𝐜𝐜𝐞𝐬𝐬𝐟𝐮𝐥𝐥𝐲 𝐝𝐞𝐥𝐢𝐯𝐞𝐫𝐞𝐝 𝐩𝐫𝐨𝐣𝐞𝐜𝐭𝐬, 𝐢𝐧𝐜𝐥𝐮𝐝𝐢𝐧𝐠 𝐩𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬 𝐩𝐫𝐨𝐜𝐞𝐬𝐬𝐢𝐧𝐠 𝐦𝐢𝐥𝐥𝐢𝐨𝐧𝐬 𝐢𝐧 𝐚𝐧𝐧𝐮𝐚𝐥 𝐫𝐞𝐯𝐞𝐧𝐮𝐞. ❇️ I focus on outcomes that matter: 🔹Higher checkout conversion 🔹Fewer payment failures 🔹Faster product launches 🔹Secure, scalable architecture ❇️Why clients hire me: 🔹Clean, reliable implementation 🔹Clear communication and on-time delivery 🔹Strong ownership from planning to production 𝐑𝐞𝐜𝐞𝐧𝐭 𝐜𝐥𝐢𝐞𝐧𝐭 𝐟𝐞𝐞𝐝𝐛𝐚𝐜𝐤 (𝟓 star): “Saidur is an excellent developer who goes above and beyond to get the job done. I recommend Saidur for any work you need done. 5 Stars from Me.” “I’m bringing Saidur back for the Google Cloud setup because his work quality is consistently high... clean, secure implementations... confident in the outcome.” ❇️ Core expertise: 🔹Full-stack web and mobile development 🔹SaaS platforms (multi-tenant, RBAC, subscriptions, billing) 🔹Stripe integrations (Checkout, Subscriptions, Connect, Webhooks, Invoicing, Tax, Payouts, SCA/3DS, ACH, SEPA, Apple Pay, Google Pay) 🔹Payment migrations (between Stripe accounts or from other gateways) 🔹AI features (OpenAI/ChatGPT, RAG, function calling, agentic workflows, AI automation) 🔹API development and integrations (REST, webhook-driven systems) 🔹MVP development (rapid build to production-ready architecture) ❇️ AI/LLM capabilities: 🔹Prompt design and tool/function workflows 🔹RAG pipelines (embeddings, vector search, reranking) 🔹AI + rule-engine hybrid systems 🔹Deployment patterns (queues, workers, caching, monitoring) ❇️ Tech stack: 𝐁𝐚𝐜𝐤𝐞𝐧𝐝: Node.js, Python, Next.js, NestJS, Laravel, CodeIgniter, CakePHP, WordPress, Java, MySQL, MongoDB, Supabase 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝: React, Next.js, React Native, Vue, TypeScript, Tailwind CSS 𝐃𝐞𝐯𝐎𝐩𝐬/𝐂𝐥𝐨𝐮𝐝: Docker, Kubernetes, Nginx, AWS, GCP (Cloud Run, Cloud SQL), Terraform, Ansible, Jenkins, Grafana, CI/CD automation, infrastructure as code (IaC), load balancing, CDN, monitoring, logging, and observability. 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬: Stripe, PayPal, WorldPay, Plaid, Mollie, Scalapay, Zapier, Pabbly, QuickBooks, FreshBooks, Pipedrive, Mailchimp, Facebook Pixel, Google Analytics, and many more. If you need a developer who can build, fix, and scale your product with quality and speed, send me a message with your goals and timeline. I can start with a quick technical assessment and clear implementation plan. Thanks, Saidur Rohman

I am based in Dhaka, Bangladesh. I have over 20 years of experience in web development. I work on PHP, MySQL, JavaScript, HTML5, CSS3, WordPress, WooCommerce, Elementor, Responsive degisn, image editing with JavaScript, Paypal Standard and adaptive payment API, Stripe API, WorldPay, USPS, Fedex, UPS, and DHL shipping APIs, Google Map APIs, Web Service and RESTful application development, Apache, nginx, Named, IPTables and linux server administration.

✨𝗬𝗼𝘂𝗿 𝗶𝗱𝗲𝗮 𝗶𝘀 𝗻𝗼𝘁 𝗷𝘂𝘀𝘁 𝗮 𝗽𝗿𝗼𝗱𝘂𝗰𝘁, 𝗶𝘁'𝘀 𝘆𝗼𝘂𝗿 𝗗𝗥𝗘𝗔𝗠. ✨ 🎖️Being Top Rated and with 7 years of experience let's 𝗜𝗡𝗧𝗘𝗚𝗥𝗔𝗧𝗘 𝗣𝗔𝗬𝗠𝗘𝗡𝗧 𝗚𝗔𝗧𝗘𝗪𝗔𝗬 in your application ✅ Top Rated Freelancer ✅ 2+ Years of Payment Gateway Integration experience ✅ 7+ Years of experience in Web app & Mobile development 🚀 50+ React application design & developed till date. 🚀 10+ React native mobile application design & developed till date. 🚀 Worked with SAAS, Real Estate, Health care, IOT, E-commerce, Fintech, etc 🚀 MVP consultant ✨Project architect & consultant ❤️ Passion for web & mobile application development 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀 𝗜 𝗱𝗼: --------------------------- ✅ Billing & Invoicing • Recurring payments & billing automation • Auto-generated invoices & receipts • Manual invoices via mobile-friendly web forms • Metered/usage-based billing (e.g., API calls) • Flexible subscription schedules 💳 Checkout & Payment Flows • Stripe-hosted & custom subscription checkouts • Custom payment flows (PCI DSS compliant) • Native Stripe Checkout with chargeback protection • Beautifully designed secure payment forms 👥 Customer Management • Customer portal for managing subscriptions • Store customer info securely (PCI compliant) 🔁 Webhooks & Automation • Stripe webhooks for emails & custom invoices • Setup static & dynamic Stripe products ⚡𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝘆 𝗦𝘁𝗮𝗰𝗸: React, Next.js, React Native, Node.js, Express, NestJS, MongoDB 🏆 𝗥𝗲𝘃𝗶𝗲𝘄𝘀 𝗮𝗻𝗱 𝗳𝗲𝗲𝗱𝗯𝗮𝗰𝗸 𝗳𝗿𝗼𝗺 𝗵𝗶𝗴𝗵-𝗽𝗿𝗼𝗳𝗶𝗹𝗲 𝗰𝗹𝗶𝗲𝗻𝘁𝘀 🏆 ⭐️⭐️⭐️⭐️⭐️ "Highly recommend Ajmin. If anyone needs a reference, connect with me. He's multitasking and really engages in the project" - 𝗠𝗶𝗺𝘀 𝗧𝗮𝗹𝘀𝗶, 𝗟𝗼𝗻𝗱𝗼𝗻, 𝗨𝗞 ⭐️⭐️⭐️⭐️⭐️ "Ajmin was great to work with. He is not only a talented developer, but also a friendly person who truly wants to see his clients and their projects succeed" - 𝗧𝘂𝗻𝗮, 𝗕𝗼𝘀𝘁𝗼𝗻, 𝗨𝗦𝗔 ⭐️⭐️⭐️⭐️⭐️ "Knowledgeable and easy to work with. I do recommend to other works. His technical expertise is impressive" - 𝗔𝗻𝗰𝘆 𝗟𝗮𝘂𝗿𝗲𝗻𝘁, 𝗝𝗮𝗽𝗮𝗻 ⭐️⭐️⭐️⭐️⭐️ "It was a pleasure to work with Ajmin. His communication about his progress and approaches were very clear and to the point" - 𝗣𝗿𝗮𝗸𝗵𝗮𝗿, 𝗜𝗻𝗱𝗶𝗮 ⭐️⭐️⭐️⭐️⭐️ "Seller went above and beyond what was required. Already discussing a new project. His expertise in modern web technologies is exceptional" - 𝗦𝗮𝘆𝗲𝗱 𝗕𝗮𝗵𝗮𝗿𝘂𝗻 🌟𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 𝗦𝗸𝗶𝗹𝗹𝘀: ------------------------------- - Performance Improvements (SQL + Code) - Database Design (SQL, MySQL, Postgres) - JWT Authentication - API Documentation - Middleware - Agile Methodologies (Scrum) - Project Management: JIRA ---------------------------------------------------- 𝗟𝗲𝘁'𝘀 𝗱𝗼 𝗮 𝗿𝗼𝗰𝗸 𝘀𝗼𝗹𝗶𝗱 𝗽𝗮𝘆𝗺𝗲𝗻𝘁 𝗶𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻, 𝗧𝗢𝗚𝗘𝗧𝗛𝗘𝗥 ⚡️ ============================================================================= 𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀 𝘁𝗼 𝗙𝗶𝗻𝗱 𝗺𝗲 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸: Stripe Integration Expert, Stripe Connect Developer, Stripe Subscriptions Developer, Stripe Checkout Implementation, Stripe Webhooks Developer, Payment Gateway Integration Specialist, Plaid Integration Developer, PayPal Developer, PayPal REST API Expert, PayPal Subscriptions Integration, Revolut Pay Integration, Online Payment Expert, Fintech Payment Integration, Secure Payment Flow Developer, E-commerce Payment Gateway Specialist, SaaS Billing & Payments Developer, Multi-vendor Payments with Stripe Connect, Payout Automation Developer, Subscription Billing System Developer, Payment API Integration