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I’m ready to start taking USD payments and need a developer who can integrate a fiat gateway that cleanly separates incoming funds for transparent accounting. The flow is simple—one-time purchases only—but it must run flawlessly on both my website and companion iOS/Android apps. You’ll select a reputable gateway, wire it into our existing stack through the provider’s REST/JavaScript SDKs, and make sure card data never touches our servers. Webhooks should post back purchase confirmations and settlement details so we can reconcile each sale automatically. Deliverables • Gateway selection rationale and account setup guidance • Fully implemented checkout on web (React) and mobile (Flutter) with secure tokenisation • Webhook scripts and database schema for segregated payout tracking • End-to-end test cases covering success, failure, and edge scenarios • Deployment walkthrough plus concise technical documentation If you’ve rolled out PCI-compliant USD gateways before, I’d love to see examples.
Project ID: 40173413
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I have strong experience integrating PCI-compliant USD payment gateways for web and mobile apps, focusing on clean accounting and secure tokenised flows. I recommend using Stripe or Adyen for reliability, global support, and strong webhook tooling. Approach: Select and configure a reputable gateway (Stripe preferred for speed and SDK maturity). Implement secure checkout on React (web) and Flutter (mobile) using hosted or tokenised payment components so card data never touches your servers. Build webhook handlers to confirm payments, record settlement status, and store transactions in a segregated payout table for transparent accounting. Add logic for one-time purchases only, with clear success/failure handling. Provide test coverage for edge cases (failed cards, duplicate webhooks, network retries). Deliverables: Gateway selection rationale + setup guide Web & mobile checkout integration Webhook scripts + database schema End-to-end test cases Deployment and maintenance documentation I’ve previously deployed USD payment systems with Stripe and similar gateways for SaaS and digital products, ensuring PCI compliance, accurate reconciliation, and smooth user experience.
$500 USD in 7 days
7.4
7.4
141 freelancers are bidding on average $516 USD for this job

Hello, I understand you need a PCI‑compliant USD gateway integrated across your website and iOS/Android apps that cleanly separates incoming funds for transparent accounting, with webhooks posting confirmations and settlements for automatic reconciliation. My approach is to pick a reputable gateway with REST/JS SDKs, implement tokenization so card data never touches your servers, and wire it into your existing stack with a unified checkout on React web and Flutter mobile. I’ll create webhook handlers and a database schema designed for segregated payout tracking, plus end‑to‑end tests covering success, failure, and edge cases. I will provide a deployment walkthrough and concise technical docs, and I can share PCI‑compliant USD gateway examples from prior work on request. Do you have a preferred gateway or a candidate list to evaluate? What is the expected monthly volume and settlement cadence? Do you require 3DS/SCA compliance and PCI-DSS scope assessment? Do you already have API credentials and a staging environment prepared? How should webhook security be implemented (signature verification, retry policy, data fields for settlements) and any custom reconciliation mappings? Best regards,
$500 USD in 23 days
9.4
9.4

Hi, Having a decade of experience in web and mobile development, I have encountered quite a diverse range of projects, including the integration of PCI-compliant USD gateways. This relevant experience would enable me to seamlessly manage your project on fiat payment gateway integration, ensuring integrations that are clean, secure and efficient. Additionally, I have proven expertise in working with web (React) and mobile (Flutter) platforms similar to what you require, enabling me to deliver a highly functional and intuitive checkout process. My familiarity with various payment gateway APIs will come in handy as I select the most reputable gateway for your requirements. As documentation is crucial for successful projects, you can expect concise technical documentation and an end-to-end test case approach that covers success, failure, and edge scenarios. Furthermore, my strong background in PHP, JavaScript and API integration adds up to provide you with comprehensive support throughout the project. Thanks, SBM
$500 USD in 10 days
9.1
9.1

Hello, As the founder of Our Software, a multinational web service provider company, I have spent years devoting my efforts to providing high-quality payments solutions globally. Our team of experts have an exceptional understanding of integrating payment gateways flawlessly into websites and mobile apps. We help businesses like yours streamline and simplify the transaction process, ensuring that card data is never vulnerable anywhere in your system. Our immense skill set includes expertise in working with REST/JavaScript SDKs on iOS, Android as well as webapps, as specified in your project. With us, you will get not only a clean and segregated database for transparent accounting but also meticulously designed scripts for your desired webhook purposes. In addition to the technical proficiency needed for this task, we understand the importance of secure tokenisation and can elegantly structure complex systems like yours while keeping PCI-compliance on top priority. Thus, let our past accomplishments serve as examples of what we are capable of and how we can exceed your expectations. Partner with us - turn your project into a reality that sets new benchmarks for smooth operations and customer-focused approach. Thanks!
$499 USD in 3 days
8.6
8.6

Hi. As Flutter Expert, I am very interested in your project. I am very familiar with Flutter and Payment. I have mobile and backend skills with 8+ years. I wish to work for you. Thanks for attention.
$500 USD in 5 days
7.8
7.8

Hi, I can integrate a secure USD payment gateway for your web (React) and mobile (Flutter) apps, ensuring one-time purchases run flawlessly and funds are tracked separately for clear accounting. I’ll handle gateway selection, setup, tokenized payments, webhook scripts, and database schema for transparent settlement. Full end-to-end tests will cover success, failure, and edge cases, and I’ll provide a deployment walkthrough with concise documentation. I’ve implemented PCI-compliant gateways in similar setups before and can get your system live quickly.
$500 USD in 8 days
8.1
8.1

Hi Muhammad, I will carefully select a reputable fiat gateway and integrate it into your website and companion iOS/Android apps using the provider's REST/JavaScript SDKs. Card data will never touch your servers, and webhooks will ensure seamless purchase confirmations and settlement details. Let's discuss further to ensure flawless implementation. Regards, Sai Bhaskar
$500 USD in 10 days
7.7
7.7

Want a Stunning online course fiat payment gateway integration Website? Let’s Bring Your Vision to Life! ✅ Get a FREE Live Demo — Just reply to this message and see your future website in action! ✅ Multiple Design Options — Choose from a variety of modern, eye-catching layouts. ✅ 100% Satisfaction Guaranteed — Or your money back — no questions asked! ✅ 12+ Years of Experience — Proven track record in web development. Portfolio available on request. ✅ See My Work: Check out recent projects here ➡️ https://www.freelancer.com/u/qasaryome ✅ Unlimited Revisions — Until you're completely happy! ✅ 1 Month Free Support — Post-launch support to keep everything running smoothly. ✅ FREE SEO Setup — Includes Google Search Console + Google Analytics integration. ✅ Premium WordPress Website — Mobile-friendly, SEO-optimized & easy to customize. Have Questions? Let’s Chat! Reply now to get started with your FREE demo.b
$500 USD in 2 days
7.6
7.6

Hello I have thoroughly reviewed your project description and am confident in my ability to assist you in completing it successfully. I believe it would be highly beneficial to delve deeper into the specifics of the job to determine the most effective way forward. I am open to scheduling an interview at your convenience, and I genuinely appreciate the chance to collaborate with you on this project. Your response is eagerly anticipated, and I'm excited about the prospect of working together. Thank you for considering my proposal. Looking forward to your prompt reply! Best regards Rekha!!!
$500 USD in 7 days
7.9
7.9

As a senior developer with 7 years of experience in WordPress, Shopify, React, Laravel, HTML, CSS, Bootstrap, JavaScript, jQuery, Ajax, PHP, SEO and graphic design, I'm excited to help bring your project to life. Let's begin with a conversation. I have read through your requirements, and I'm confident that I’m the perfect fit for this task. My goal is to deliver work that exceeds your expectations. We can finalize the price after our discussion to ensure it aligns with your needs. Let's get started!
$500 USD in 1 day
7.2
7.2

As a representative of Web Solution Application, let me assure you that our team's experience and proficiency in JavaScript and PHP make us the perfect choice for integrating your fiat payment gateway. We have extensive experience in customizing websites and PHP Development and have successfully integrated several payment gateways for e-commerce solutions. Additionally, our speciality includes Performance Optimization and Security Hardening, something that is crucial to ensure reliable processing of sensitive card data without compromising on user safety. We understand the significance of accurate accounting while processing transactions. Therefore, we will meticulously select a secure and renowned gateway provider that aligns with your business requirements. Our focus on clean code will ensure that card data never gets stored on your servers. We'll also devise efficient webhook scripts for real-time updates to make settlement details tracking a breeze. Moreover, if you choose us for this project, we promise to provide not only the fully deployed solution but also concise technical documentation that will assist you or any future developer in seamless management and any future optimization tasks. So, without further ado, let's get started in facilitating smooth, secure and segregated fiat transactions for your website and apps!
$499 USD in 4 days
7.1
7.1

Hi, I can help you set up USD payments smoothly on your website and mobile apps. I’ve worked with payment gateways before and understand how important secure payments and clean accounting are. What I’ll do: -Help you choose a reliable USD payment gateway -Integrate secure checkout on your React website and Flutter apps -Make sure card details never touch your servers- -Set up webhooks to confirm payments and track settlements automatically -Test everything so payments work correctly in all cases You’ll get clean code, clear documentation, and an easy handover. Happy to share examples of similar payment work I’ve done. Let’s discuss your setup and get started. Thanks Sagar
$500 USD in 7 days
7.1
7.1

Hello, ? Are you looking for a seamless fiat payment gateway integration to start accepting USD payments smoothly? As a seasoned Full-Stack Developer with expertise in API integration, Payment Gateway Integration, and Mobile App Development, I can assure you of a flawless integration process. I have successfully integrated PCI-compliant USD gateways before and can select a reputable gateway that aligns with your requirements. With a focus on transparent accounting, I will wire the gateway into your website (React) and companion apps (Flutter) using the provider's REST/JavaScript SDKs to ensure secure transactions. The checkout process will involve secure tokenization, eliminating the need for card data to touch your servers. Additionally, I will set up webhook scripts for automatic purchase confirmations and settlement tracking, enabling seamless reconciliation of each sale. My deliverables will include a detailed rationale for gateway selection, fully implemented secure checkout, webhook scripts for segregated payouts, comprehensive end-to-end testing, and clear technical documentation for easy deployment. Let's discuss the next steps and how we can proceed with this integration. How soon would you like to start the development process for the fiat gateway integration?
$565 USD in 29 days
7.0
7.0

Hello Ready to integrate your fiat payment gateway for seamless USD payments. I specialize in secure, efficient integrations, ensuring you can accept payments quickly. Let's connect to define your needs and implement the ideal solution right away. I'm prepared to start immediately. Giáp Văn Hưng
$499 USD in 7 days
6.8
6.8

I'm experienced in integrating fiat payment gateways securely, ensuring seamless transactions on web and mobile platforms. With a focus on selecting reputable gateways, I will wire them into your existing stack using REST/JavaScript SDKs, while prioritizing data security and automated reconciliation. My expertise includes creating segregated payout tracking systems and detailed technical documentation for future reference. Let's discuss your requirements further for a successful integration.
$500 USD in 7 days
6.7
6.7

Hi, I'm excited about the opportunity to integrate a fiat payment gateway for your project. With extensive experience in implementing PCI-compliant USD gateways, I understand the importance of seamless transactions and transparent accounting. I have successfully integrated payment solutions in both web and mobile platforms, ensuring card data is never housed on your servers. I will first evaluate reputable payment gateways, providing you with clear rationale for the selection while setting up the necessary accounts. I will then wire the gateway into your existing stack, developing a flawless checkout process on your website (using React) and your companion apps (using Flutter). Additionally, I'll create secure webhook scripts for automatic confirmation of purchases and settlement details, along with a database schema for payout tracking. The project will be completed within 10 days, allowing for thorough testing of all scenarios. I'm looking forward to your thoughts on this approach. Best regards,
$500 USD in 10 days
6.6
6.6

Hello, Thank you for sharing this opportunity, it sounds like a great fit, and I’d be glad to be involved. I’ve worked on similar projects and am confident I can contribute meaningful value to your team. I focus on delivering high-quality, reliable solutions while ensuring the process is smooth and efficient for my clients. My goal is always to build solutions that are both technically solid and easy to maintain. You’re welcome to review my profile to see examples of my previous work. If it aligns with what you’re looking for, I’d be happy to discuss your project in more detail and outline how I can support your goals. I’m available to start immediately and can dedicate my full attention from day one. Let’s connect and explore how we can make this project a success together. Looking forward to your response. With Regards! Abhishek Saini
$500 USD in 7 days
6.7
6.7

Hello, I understand you’re looking for a developer to integrate a reliable USD fiat payment gateway that supports clean fund separation and works seamlessly across web and mobile. I have solid experience delivering PCI-compliant payment gateway integrations using REST and JavaScript SDKs, ensuring secure one-time card payments with full tokenisation so sensitive card data never touches application servers. My focus is always on stability, security, and accounting transparency. I will evaluate and select a reputable USD gateway suitable for React web checkout and Flutter-based iOS/Android apps, and clearly document the selection rationale and account setup process. The integration will include secure client-side tokenisation, a robust PHP backend for payment intent handling, and validated webhooks that post purchase confirmations and settlement details back to your database. This allows every transaction to be tracked and reconciled automatically with segregated payout records. The final delivery will include fully implemented checkout flows on web and mobile, webhook scripts, database schema for payout tracking, and comprehensive test cases covering success, failure, and edge scenarios. I will also provide a clear deployment walkthrough and concise technical documentation so your team can confidently deploy and maintain the solution in production with minimal friction. Thanks Asif.
$750 USD in 5 days
6.4
6.4

When it comes to your Fiat Payment Gateway Integration project, my team and I at Prajapati Technologies have the technical prowess and extensive experience to deliver exactly what you need. We've successfully implemented PCI-compliant USD gateways before for several high-profile clients and have a deep understanding of REST/JavaScript SDKs that will be crucial in this project. As a top-rated Shopify and Wordpress developer, I am no stranger to working with different stacks and platforms simultaneously. I can guarantee a clean integration of your selected gateway into your website as well as your companion iOS/Android apps with secure tokenization, ensuring card data never touches our servers. Additionally, Webhooks for purchase confirmations and settlement details will be fully setup along with segregated payout tracking in an efficient database schema. Our service doesn't stop at deployment. We take pride in providing comprehensive end-to-end support and that includes concise technical documentation, end-to-end test cases covering various scenarios, and even a detailed deployment walkthrough. With Prajapati Technologies on board, not only will you get impeccably functional software, but you'll have my commitment to making sure it runs flawlessly for our mutual success and satisfaction.
$500 USD in 7 days
6.3
6.3

Hello, client I'm Denis Redzepovic, an experienced developer skilled in API Integration, Mobile App Development, JavaScript, REST API, Android, Flutter, Payment Gateway Integration and PHP. I specialize in building high-performance, scalable, and visually appealing applications that deliver smooth functionality and a seamless user experience. Whether you need full app development, UI/UX improvements, API integrations, or performance optimizations, I can provide a tailored solution that fits your needs. I focus on clean, maintainable code with responsive UI, smooth animations, robust state management, and seamless API integration. My approach ensures scalable architecture and pixel-perfect design, delivering consistent performance across Android and iOS platforms. With cross-platform efficiency and attention to detail, I’m confident I can add strong value to your project. I’d love to discuss your requirements and find the best approach to bring your vision to life. Thanks, Denis
$499 USD in 5 days
5.9
5.9

Hey there, I'm confident in integrating a fiat payment gateway for your USD transactions seamlessly. With expertise in integrating gateways, I'll select a reputable one, connect it via the provider's REST/JavaScript SDKs, and ensure secure transactions without storing card data. I'll set up webhooks for automatic sale reconciliation and provide end-to-end testing for reliability. Let's discuss further details for a tailored solution. Looking forward to your response!
$499 USD in 7 days
5.8
5.8

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