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I’m ready to standardise and streamline payments across several e-commerce shops and marketplace portals we manage. To do that, I need a single orchestrator layer that can sit between each site and the individual gateways—PayPal, Stripe, and Square—so our developers can call one clean API instead of three different SDKs. Scope • Set up a robust, modular service (language and framework are flexible) that exposes REST or GraphQL endpoints for authorise, capture, refund, and subscription-style operations. • Implement gateway adapters for PayPal, Stripe, and Square, switching dynamically according to rules I’ll provide (e.g., best fee, currency availability, fallback logic). • Handle multi-currency flows natively in USD, EUR, and GBP, with correct rounding, FX display and gateway-specific quirks accounted for. • Provide straightforward authentication (JWT or similar), webhooks for status updates, and idempotency so front-end teams can safely retry. • Supply concise documentation and a Postman collection so my engineers can plug in quickly, plus unit and integration tests that run in CI. Acceptance criteria 1. A dockerised build spins up the orchestrator, connects to sandbox keys for all three gateways, and completes a full payment flow in each currency. 2. API responses follow the schema we agree on; any deviation blocks sign-off. 3. Codebase is clean, commented, and handed over in a private repo alongside the technical docs. If this sounds like your wheelhouse, let’s talk timeline and hand-off details so I can put this into production without stalling our release calendar.
ID Projek: 40332620
130 cadangan
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Aktif 18 hari yang lalu
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130 pekerja bebas membida secara purata $746 USD untuk pekerjaan ini

Drawing from my vast experience spearheading web and app development projects for over 18 years, my team at CnELIndia is ideally positioned to deliver exceptional results on your Multi-Site Payment Orchestrator Development endeavor. We understand the critical nature of payment management in e-commerce, particularly in the context of multiple sites and marketplaces. Our commitment to developing robust, modular systems that streamline processes aligns perfectly with the goal of your project. We are no stranger to integration - our comprehensive understanding and proficiency in integrating third-party services like PayPal, Stripe, and Square into different platforms give us an edge in delivering precisely what you're seeking. Additionally, our skills in Docker, JavaScript, and Software Architecture equip us to create scalable and adaptable solutions that will fit with your particular needs. In conclusion, with my deep knowledge of API development, proficient grasp of Docker and JavaScript – as well as our expert command over PHP – we are fully prepared to not only create a clean orchestration layer that meets your requirements but also provide concise documentation and assistance for your team's smooth upscaling process. Any successful project is built on solid foundations; consider me the constructor who can guarantee a masterpiece with your Multi-Site Payment Orchestrator project.
$700 USD dalam 15 hari
9.0
9.0

Hello, As the proud leader of one of Pakistan's foremost web service provider companies, my team at Our Software brings years of experience and a reputation for delivering quality, smartly-engineered solutions to complex payment challenges. Our skill sets in JavaScript, Mobile App Development, and PHP align perfectly with the needs of your project. To bring your multi-site payment orchestrator to life, we will build for you a robust, modular service that speaks REST or GraphQL fluently. This exceptional system will incorporate gateway adapters for PayPal, Stripe, and Square that switch intelligently based on rules you give us. We'll handle all multi-currency flows seamlessly in USD, EUR, and GBP ensuring correct rounding and taking care of gateway-specific peculiarities. User-centric as always, we'll deliver straightforward authentication processes (using JWT) and convenient webhooks for instantaneous status updates. I am eager to ensure that your front-end teams can work effortlessly with the orchestrated system we're building for you. By providing comprehensive documentation and a Postman collection along with unit and integration tests that run in CI, we grant your engineers easy entry into our solution so that you can quickly continue with your release calendar from the get-go. Trust me to keep you consistently informed on progress and remember that your satisfaction drives everything we do at Our Software! Thanks!
$699 USD dalam 6 hari
8.6
8.6

Hi, This is Elias from Miami. I checked your project description and understand you’re looking to standardize and streamline payments across multiple e-commerce shops and marketplace platforms. This sounds like a great initiative to enhance the user experience and operational efficiency! I’ve worked on several payment integration projects and understand the key technical challenges involved, especially when dealing with multiple platforms. I propose to use a modular approach to ensure scalability and flexibility, leveraging REST APIs for seamless integration with various payment gateways. I have a few questions to get a better understanding: Q1 – What specific payment gateways are you looking to integrate? Q2 – Will there be different user roles managing payments across the shops? Q3 – Are there any existing systems we need to consider when designing this orchestrator? I’d be happy to go through the details and suggest the best technical approach. Looking forward to hearing from you.
$700 USD dalam 11 hari
8.6
8.6

Hi there, Asad- I sense your goal is to eliminate the friction of juggling three payment SDKs while giving your developers a single, reliable API they can trust across shops and marketplaces. I’ve built and scaled modular payment orchestrators before, with robust gateway adapters for PayPal, Stripe, and Square, plus multi-currency flows, idempotency keys, and solid observability. What I’ll deliver: - A dockerised, language-flexible orchestrator exposing REST or GraphQL for authorize, capture, refund, and subscription-like actions. - Dynamic gateway adapters with rules for best-fee, currency availability, and smart fallbacks; currencies: USD, EUR, GBP with proper rounding and FX handling. - Secure auth (JWT), webhooks, and full idempotency guarantees so retries never cause duplicate charges. - Clear docs and a Postman collection; unit and integration tests designed for CI, with a simple on-boarding process for your engineers. - A private repo hand-off with clean, commented code and a concise tech doc set. Initial plan and timeline: I’ve shared an initial estimate based on your description, and once we go over a few technical details, I’ll confirm the exact cost and delivery schedule. I’ll target a dockerised sandbox setup that can run end-to-end flows in USD, EUR, and GBP, with sandbox keys for PayPal, Stripe, and Square to validate the full payment lifecycle. Next steps: confirm acceptance criteria, preferred stack and hosting venue, and any non-functional requirements (au
$699 USD dalam 10 hari
8.2
8.2

Hi, this looks like the execution-side companion to the transaction analysis/risk layer you’re building, so I would approach it as part of the same architecture: one module standardizes payment execution across gateways, while the other can later consume the normalized transaction flow for scoring, routing intelligence, and anomaly analysis. For this module, the real value is not just wrapping SDKs. It is creating a clean orchestration layer that exposes a stable API for authorize, capture, refund, and subscription-style operations, while handling the difficult parts centrally: idempotency, webhook reconciliation, dynamic gateway routing, multi-currency normalization, and a response contract your teams can trust. Stripe, PayPal, and Square all support the core payment lifecycle, but each one behaves differently around payment states, webhooks, subscriptions, and currency handling, so the abstraction has to be designed carefully rather than treated as a thin proxy. My recommendation would be a modular, containerized service with gateway adapters, routing rules, persistent idempotency/webhook handling, CI-ready tests, and concise technical docs/Postman so your developers can integrate quickly. The goal is to reduce payment complexity across all your shops without creating a brittle abstraction layer that becomes hard to maintain later. Nico – widuIT - Top Freelancer LATAM
$2,100 USD dalam 40 hari
8.4
8.4

Hi there, I can build a clean, scalable payment orchestrator layer that sits between your platforms and PayPal, Stripe, and Square. It will expose a unified API (REST or GraphQL) for authorize, capture, refund, and subscriptions, with dynamic gateway switching based on your rules (fees, currency, fallback). I’ll ensure proper multi-currency handling (USD, EUR, GBP), idempotency, secure JWT auth, and webhook support for real-time updates. The solution will be dockerized, fully tested, and production-ready, with clear documentation and a Postman collection so your team can integrate quickly. I’ll deliver clean, maintainable code with CI-ready tests and support a smooth handover in your private repo. Kindly send me a message to discuss more. Thanks!
$700 USD dalam 8 hari
8.2
8.2

HELLO, WE HAVE WORKED ON SIMILAR PAYMENT ORCHESTRATION SYSTEMS AND CAN PROVIDE EXAMPLES. WE CLEARLY UNDERSTAND YOUR REQUIREMENT FOR A UNIFIED PAYMENT ORCHESTRATOR LAYER CONNECTING PAYPAL, STRIPE, AND SQUARE WITH A CLEAN API AND DYNAMIC ROUTING LOGIC. WITH 10+ YEARS OF EXPERIENCE IN BACKEND DEVELOPMENT, API DESIGN, AND PAYMENT INTEGRATIONS, I CAN BUILD A MODULAR, SCALABLE SERVICE USING NODE.JS OR PYTHON WITH REST/GRAPHQL SUPPORT, SECURE JWT AUTH, WEBHOOK HANDLING, AND IDEMPOTENT REQUEST FLOWS. WORKING FLOW → REQUIREMENT FINALIZATION → DEFINE API SCHEMA & ROUTING RULES ARCHITECTURE SETUP → DOCKERIZED MICROSERVICE WITH ADAPTER PATTERN GATEWAY INTEGRATION → PAYPAL, STRIPE, SQUARE WITH SANDBOX TESTING MULTI-CURRENCY HANDLING → USD, EUR, GBP WITH FX LOGIC TESTING & DELIVERY → CI TESTS, POSTMAN COLLECTION, DOCUMENTATION I WILL PROVIDE 2 YEAR FREE ONGOING SUPPORT AND COMPLETE SOURCE CODE. WE WILL WORK WITH AGILE METHODOLOGY AND WILL GIVE YOU ASSISTANCE FROM ZERO TO DEPLOYMENT. I ENSURE CLEAN, MAINTAINABLE CODE WITH FULL HANDOVER AND SMOOTH PRODUCTION READINESS. I EAGERLY AWAIT YOUR POSITIVE RESPONSE. THANKS
$700 USD dalam 7 hari
8.4
8.4

Hi, I will develop a robust, modular service with REST or GraphQL endpoints for payment operations, implement gateway adapters for PayPal, Stripe, and Square, handle multi-currency flows, provide authentication, webhooks, idempotency, documentation, Postman collection, and tests. Let's discuss further details in the chat. Regards, Sai Bhaskar
$699 USD dalam 20 hari
7.8
7.8

Hi, We’ve built similar payment orchestration systems that connect multiple gateways with a single API, allowing developers to focus on business logic instead of integrating multiple SDKs. We’ve worked with Stripe, PayPal, and Razorpay, and we understand the nuances of payment processing, including currency conversion and handling refunds. For your project, we can create a robust, modular solution that supports multiple languages and frameworks. We’ll also ensure that the system is secure and compliant with PCI standards. Let’s schedule a 10-minute introductory call to discuss your project in more detail and see if I’m the right fit for your needs. I’m eager to learn more about your exciting project. Best regards, Adil
$700 USD dalam 7 hari
7.4
7.4

Hi, This is very much in our wheelhouse. We’ve built payment, wallet, and transaction orchestration systems where the key goal is exactly this: one clean API layer instead of multiple gateway-specific implementations. We can deliver: • Modular orchestrator service (REST or GraphQL) • Gateway adapters for PayPal, Stripe, and Square • Auth / capture / refund / subscription-ready flows • Dynamic routing rules (fee, currency, fallback, availability) • Multi-currency support (USD / EUR / GBP) with proper rounding and gateway-specific handling • JWT auth, idempotency, signed webhooks, CI-ready tests • Dockerized setup, Postman collection, and technical docs Suggested stack: Backend: Laravel or Node.js DB: PostgreSQL Infra: Docker + AWS/GCP-ready deployment We’d design this with an adapter pattern + centralized payment core, so adding new gateways later is straightforward without rewriting the API contract. We also understand the hard parts: retry safety, webhook consistency, subscription edge cases, FX display, and unified error handling across providers. We can move quickly and hand over clean, documented code in a private repo, ready for production rollout. Happy to discuss timeline and the routing rules you already have in mind. Best regards
$700 USD dalam 7 hari
7.6
7.6

Hello --- I will develop a robust multi-site payment orchestrator to centralize and unify your payment processes. This solution will standardize and streamline transactions across all locations, significantly enhancing efficiency and reducing operational complexity. Let's build a seamless, future-proof payment system tailored to your needs. Ready to discuss. Giáp Văn Hưng
$699 USD dalam 7 hari
6.8
6.8

Hello, I understand you need a multi-site payment orchestrator that sits between your e-commerce shops and PayPal, Stripe, and Square, exposing a single clean API. I can develop a modular, dockerized service with REST/GraphQL endpoints for authorize, capture, refund, and subscription operations, including dynamic gateway switching based on your rules (fees, currency, fallback). The orchestrator will handle USD, EUR, and GBP natively, with correct rounding, FX display, idempotency, and webhook support. Deliverables include unit and integration tests for CI, full documentation, and a Postman collection for easy front-end integration. The codebase will be clean, commented, and delivered in a private repo for immediate deployment. Questions: Are there specific rules or priorities for gateway selection beyond fees and currency? Do you want subscription flows handled entirely within the orchestrator or passed through gateway-native recurring features? Thanks, Asif
$700 USD dalam 4 hari
6.8
6.8

Hi, As per my understanding: Multi-site payment orchestrator—unified REST/GraphQL API layer abstracting PayPal/Stripe/Square gateways with dynamic routing (fees/currency/fallbacks), multi-currency USD/EUR/GBP, JWT auth, webhooks, idempotency. Implementation approach: - Node.js/Express or FastAPI service with gateway adapters. - Dockerized, PostgreSQL for idempotency tracking, webhook handlers. Queries: Gateway priority rules? I'll share my portfolio on your first message—payment systems are my strength! Kindest Regards Regards
$1,250 USD dalam 35 hari
6.9
6.9

I'm Iosif Peterfi, 15+ years helping teams streamline payments and security with practical, business-focused leadership. This is my speciality: designing secure, centralized payment orchestration layers that connect multiple gateways, optimize costs, and protect revenue through reliable retries, clear rules, and compliance-ready processes. You're standardising payments across several shops and marketplaces with a single orchestrator between your sites and PayPal, Stripe, and Square. You want a modular service exposing REST or GraphQL endpoints for authorize, capture, refund, and subscription-style operations; gateway adapters that switch dynamically by rules; native multi-currency flows for USD, EUR, and GBP; straightforward authentication, webhooks, and idempotency; plus concise docs, a Postman collection, and solid unit/integration tests. My approach delivers a resilient, business-ready solution that reduces integration risk and accelerates time to production. In a similar engagement, I built a centralized payment layer for a multi-marketplace retailer, aligning three gateways, cutting failed transactions by a notable margin and speeding reconciliation. That experience informs a fast, risk-conscious rollout for your shops, with measurable improvements and clear governance. Let's chat - I can walk you through my approach in 15 minutes.
$4,200 USD dalam 21 hari
6.7
6.7

Hello There!!! ★★★★ (Build a unified multi-gateway payment orchestrator API layer) ★★★★ I understand you need a centralized payment orchestrator that connects multiple sites with PayPal, Stripe, and Square through one clean API, including routing logic, multi-currency handling, and secure scalable architecture. ⚜ REST/GraphQL API development ⚜ Gateway adapters (PayPal, Stripe, Square) ⚜ Smart routing & fallback logic ⚜ Multi-currency handling (USD, EUR, GBP) ⚜ JWT auth, webhooks & idempotency ⚜ Dockerized deployment setup ⚜ API docs, Postman & testing I have experince in building API systems and payment integrations, including multi-gateway logic and scalable backend architechture. I enjoy designing clean and reusable systems. I’ll use Node.js/PHP with modular design, implement adapters, and ensure reliable routing with full test coverage and CI support. Let’s discuss and get this into production smoothly. Warm Regards, Farhin B.
$700 USD dalam 7 hari
6.7
6.7

With over 13 years of experience in developing robust web applications, APIs, and backend services, I have the requisite skills for your Multi-Site Payment Orchestrator project. My expertise in API development, payment gateway integration, and knowledge of languages such as PHP, Node.js and C++, make me an ideal fit for this complex project. I have extensive experience creating modular software systems like the one you need, allowing for easy integration with multiple sites and gateways to process payments seamlessly. Additionally, I can implement and handle multi-currency flows natively which are crucial to your project. Another important point to mention is my strong commitment to maintainable code and effective documentation. When working with me, you can trust that I will not only deliver a solution that meets all Acceptance Criteria but also provide you with complete post-production handover including clean commented codebase and technical docs for smooth collaborations going forward. By choosing me, you're guaranteeing successful implementation of your Multi-Site Payment Orchestrator. Not only do I have a track record of delivering quality projects, but my clients' reviews also speak volumes about my ability to deliver robust, scalable and maintainable systems. Let's talk timeline and hand-off details so we can put this into production without stalling your release calendar!
$700 USD dalam 25 hari
6.7
6.7

Hello! As a seasoned payment integration architect with over 9 years of experience, I specialize in building unified orchestration layers that simplify multi-gateway complexity. I see you need a single API to replace PayPal, Stripe, and Square SDKs across your e-commerce shops—clean, modular, and production-ready. Here's how I can help: - Build a dockerized orchestrator with REST endpoints for authorize, capture, refund, and subscriptions - Implement gateway adapters with dynamic switching based on fees, currency, or fallback rules - Handle multi-currency flows natively (USD, EUR, GBP) with correct rounding and gateway-specific quirks - Add JWT authentication, idempotency, and webhooks for reliable status updates - Deliver Postman collection, unit/integration tests, and clean documentation for your engineers I've built similar payment hubs with Node.js and Python. To confirm, do you have sandbox keys ready for all three gateways, and what's your preferred framework or language for the orchestrator?
$700 USD dalam 4 hari
6.0
6.0

hi! i have reviewed the details of your project and i can do this!!. we have handled similar projects successfully, and I am confident we can deliver high quality results for you. we prefer clear communication and regular updates so that the project progresses smoothly and meets your expectations. let's have a detailed discussion, as it will help me give you a complete plan, including a timeline and estimated budget. I will share my portfolio in the chat to show relevant examples of our past work. looking forward to your response. mughiraa
$700 USD dalam 7 hari
5.6
5.6

Hello, I’m ready to standardise and streamline payments across your e commerce shops. I’ve carefully reviewed your project and am excited about the opportunity to work with you. With 7 years of experience in API development and payment gateway integration, I specialize in delivering unified orchestrator layers that simplify complex multi gateway environments. I am confident I can solve your need for a single clean API that handles PayPal, Stripe and Square efficiently and effectively. Here’s my approach: Build a modular service exposing REST or GraphQL endpoints for authorise, capture, refund and subscription flows. Create dynamic adapters for all gateways with rule based switching for currency, fees and fallback logic. I am available to start immediately and aim to deliver a production ready orchestrator within 14 days. Additional instructions or notes optional: The service will support multi currency with accurate rounding and FX handling. I will prepare documentation, Postman collection and full test coverage with a dockerised build. Best regards, Jushua
$780 USD dalam 3 hari
5.4
5.4

Hello, I understand the need to simplify and optimize payment processes across multiple e-commerce platforms and marketplaces by implementing a centralized orchestrator layer. This layer will seamlessly integrate with PayPal, Stripe, and Square gateways, providing a unified API for all payment operations. My approach involves developing a modular service with REST or GraphQL endpoints for various payment functions, along with dynamic gateway adapters based on specified rules. Handling multi-currency transactions in USD, EUR, and GBP, ensuring accurate rounding and gateway-specific considerations, will be a key focus. I am prepared to start immediately and would welcome a discussion to delve deeper into the project scope, timeline, and expectations. By delivering concise documentation, a Postman collection, and robust testing mechanisms, I aim to facilitate a smooth transition for your engineering teams. Best regards, Justin
$700 USD dalam 7 hari
5.3
5.3

Singapore, Singapore
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