Fintech Open Banking Payment Integration

@AwaisChaudhry

Hello, I’ve read your Fintech Open Banking project and I can build a production-ready payment microservice that talks directly to bank APIs, with proper consent flows, receipts, and robust operations. My approach will be to implement a Node.js or Python-based service that connects to Open Banking endpoints, handles OAuth2 consent securely, and supports both inbound payments and outbound payouts. I’ll structure clear REST/JSON endpoints for the front-end, include audit logs, idempotency keys, and strong customer authentication, and wire up webhook-like status notifications for real-time updates. I’ll also generate digital receipts when a transaction settles and expose a PostgreSQL-backed data store with clean migrations. Finally, I’ll provide Postman/Swagger collections, a concise deployment guide with environment templates, and a short demo video showing a payment, a payout, and the receipt. Understanding and approach: You want a bespoke gateway with direct bank API integration, avoiding third-party payment rails. I will design a lean, secure microservice that supports consent, payments, payouts, receipts, and status callbacks, with clear API surfaces for your frontend and strong observability for audits. The stack will be kept flexible (Node.js or Python, PostgreSQL, AWS/GCP), selecting the optimal runtime for speed and reliability, and following best practices for testing and deployment. Technical questions I should ask you: How do you want to handle bank API sandbox vs

@ZohaibRoy

⭐⭐⭐⭐⭐ Build a Custom Payment Gateway with Open Banking Standards ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project requirements and see you're looking for a developer to create a payment-processing flow for your fintech app. Look no further; Zohaib is here to help you! My team has successfully completed over 50 similar projects in payment processing. I will connect to Open Banking endpoints, handle OAuth2 consent, and securely initiate payments while generating digital receipts automatically. ➡️ Why Me? I can easily build your payment processing flow as I have 5 years of experience in payment systems, specializing in Open Banking standards, REST APIs, and secure transactions. My expertise includes working with Node.js, Python, PostgreSQL, and cloud deployment. I also have a strong grip on implementing audit logs, idempotency keys, and customer authentication. ➡️ Let's have a quick chat to discuss your project in detail. I can showcase samples of my previous work and explain how I can add value to your project. Looking forward to discussing this with you in chat. ➡️ Skills & Experience: ✅ Open Banking Standards ✅ Payment Processing ✅ REST API Development ✅ OAuth2 Implementation ✅ Node.js ✅ Python ✅ PostgreSQL ✅ AWS or GCP ✅ Digital Receipt Generation ✅ Secure Transactions ✅ Audit Logging ✅ Webhook Notifications Waiting for your response! Best Regards, Zohaib

@diektech

Hi, This is Elias from Miami. I checked your project description and understand you're looking to integrate a full payment solution that complies with PSD2/Open Banking standards. This is a crucial step towards enhancing user trust and security in fintech applications. I have successfully built similar payment integration systems before, ensuring compliance and seamless user experiences. For your project, I would recommend a microservices architecture using Node.js for the backend, PostgreSQL for data storage, and AWS for hosting. This combination will allow for secure API interactions while providing scalability and performance. I’d be happy to go over the details and refine the best approach for your use case. Q1 – What specific payment gateways are you considering for this integration? Q2 – Are there any particular security features you want included in the implementation? Q3 – What is your timeline for completing this integration? Looking forward to hearing from you.

@divumanocha

Hello Greetings, After reviewing your project description, I feel confident and excited to work on this project for you. But I have some crucial things and queries to clear out. Please leave a message on chat so we can discuss this, and I can share my recent work similar to your requirements. Thanks for your time! I look forward to hearing from you soon. Best Regards.

@mrresearcher99

Hi, This is a very interesting and technically solid requirement. I have 5+ years of experience in full-stack development (PHP, MERN) and have built secure, scalable backend systems with REST APIs, payment flows, and third-party integrations. For your fintech app, I can design a robust payment microservice handling OAuth2-based consent, secure bank API integrations, and both payment initiation and payout flows. I’ll ensure clean REST endpoints, proper idempotency handling, audit logs, and webhook-based status updates. Strong focus will be on security, performance, and compliance-ready architecture. I’m comfortable working with Node.js or PHP-based services along with PostgreSQL, and deploying on AWS/GCP. Deliverables like Swagger/Postman docs, deployment guide, and demo walkthrough will be covered. I understand the importance of accuracy in financial transactions and will ensure receipts and transaction states are fully aligned with bank confirmations. Happy to discuss timelines, architecture approach, and milestones. Looking forward to connecting. Best, Bhargav

@corpmember29

HELLO, I HAVE CAREFULLY REVIEWED YOUR REQUIREMENTS FOR A FINTECH OPEN BANKING PAYMENT INTEGRATION. With 10+ years of experience in Python, Node.js, and fintech API integrations, I can build a secure, production-ready microservice that connects directly to Open Banking endpoints following PSD2 standards. CORE DELIVERABLES → • Implement OAuth2 consent flows and securely initiate both incoming and outgoing payments • Generate digital receipts automatically and expose clean REST/JSON endpoints • Include audit logs, idempotency keys, strong authentication, and webhook notifications • Ensure deployment-ready solution on AWS/GCP with full documentation and environment setup I WILL PROVIDE 2 YEARS FREE ONGOING SUPPORT AND COMPLETE SOURCE CODE, FOLLOWING AGILE METHODOLOGY, AND WILL GUIDE YOU FROM ZERO TO FULL PRODUCTION DEPLOYMENT. I am confident in delivering a robust, scalable payment microservice with clean endpoints and full auditability. I eagerly await your positive response. Thanks

@hireageek

Hi there, I understand the intricate requirements of building a robust payment-processing flow in your fintech app that adheres to PSD2/Open Banking standards. Having extensive experience in payment gateway integrations, I am confident in my ability to connect to the required Open Banking endpoints and ensure secure payment initiations without intermediary layers like Stripe or PayPal. My proficiency in Node.js, PostgreSQL, and cloud deployment, particularly with AWS and GCP, positions me well to deliver a custom-built gateway that meets your needs effectively. I am excited to collaborate on developing a solution that not only handles consent and transaction logic but also ensures production readiness with strong security protocols. Let's discuss timelines and milestones that work for you so we can set this project in motion. What specific banks do you plan to integrate with for the Open Banking standards? Best regards,

@devendrathakur12

Hello, Can we discuss about your PSD2 payment flow project cause I have built a direct bank API integration handling OAuth2 consent and secure transaction flows without third-party gateways. I’ll set up clean REST APIs, SCA, idempotency, webhooks, and receipts using Node.js and PostgreSQL. Which banks or aggregators are you targeting first? How will you handle SCA fallback cases? Do you need sandbox to production switching built in? One heads-up: bank API inconsistencies can affect settlement confirmations. Best regards, Devendra S.

@iosifpeterfi

Hello, your goal to wire payments directly between customer bank accounts via PSD2/Open Banking, with auditable receipts and real-time status updates, is exactly what I deliver. This is my speciality: building bank-grade payment flows that talk directly to banks' APIs while keeping your front end clean and fast. I'm Iosif Peterfi, 15+ years helping fintechs ship secure, reliable software. Portfolio: https://www.freelancer.com/u/iosifpeterfi Approach: I'll create a payment microservice that handles consent (OAuth2), initiates and reconciles both incoming and outgoing transfers, and auto-generates receipts when settlements occur. You'll have clear REST/JSON endpoints for your UI, robust audit logs, idempotency, strong customer authentication, and webhook-like status notifications. This reduces risk, accelerates time to market, and gives you a scalable, compliant flow. Similar project story: Last month I helped a European fintech migrate their payments to Open Banking. The challenge was cross-bank consent and reconciliation; onboarding time dropped from 4 days to 6 hours and reconciliation errors were eliminated in the first month. Let's chat - I can walk you through my approach in 15 minutes.

@Julian29

Hello, I have carefully reviewed your Fintech Open Banking Payment Integration requirements and understand the full scope. With 10+ years of experience in Node.js/Python, PostgreSQL, and secure payment integrations, I can deliver a robust, production-ready solution for your fintech app. I focus on delivering secure, scalable, and maintainable code suitable for a live fintech environment. I eagerly await your positive response. Thanks.

@abhisyc70

Hello, Your requirement is a true Open Banking payment system (PSD2-compliant)—handling OAuth2 consent, direct bank integrations, payments, payouts, and audit-ready flows. This is not a simple API integration; it requires secure, reliable, and compliant backend architecture. My approach: • Build a Node.js microservice with clean modular architecture • Integrate Open Banking APIs with OAuth2 consent + Strong Customer Authentication (SCA) • Implement payment flows: – Incoming payments (account-to-account) – Outgoing payouts • Generate digital receipts aligned with bank confirmations • Add idempotency handling to prevent duplicate transactions • Full audit logs for compliance and traceability • Webhook system for real-time transaction status updates • PostgreSQL database for transactions, logs, and reconciliation API layer: • Clean REST/JSON endpoints for frontend integration • Swagger/Postman documentation for all endpoints Deployment: • Docker-ready setup with environment configs • Cloud deployment support (AWS/GCP) I have 10+ years of backend experience building production systems using Node.js, PostgreSQL, secure APIs, and payment integrations, including systems where data integrity and reliability are critical. I can handle this end-to-end—from architecture to demo walkthrough. Let’s schedule a discussion to align on the specific Open Banking provider and flow so I can design this securely from day one.

@Rekhathakur

Dear Client, My name is Rekha, and I have over a decade of experience in the software development space. Your fintech project gets me really excited! I have a substantial expertise in Java, Node.js, PostgreSQL and Python which aligns splendidly with your preferred tech stack. With specific emphasis on your requirement for an Open Banking endpoint integration, it's worth mentioning that I am well-acquainted with OpenAPI (Swagger) and have worked extensively with OAuth2 - an integral element of any effective open banking solution. In addition to this, my experience spans across numerous finance-related systems encompassing CRM, ERP, payment gateways and more. This has allowed me to dive deep into crucial security protocols such as strong customer authentication and idempotency keys. Moreover, I have mastered cloud deployment on AWS (or GCP) for scalable applications. Above all else, my clients have consistently acclaimed me for my ability to deliver clean, well-structured codes that other developers love to work with. Beyond providing the solutions your project requires, I will ensure thorough end-to-end documentation in the form of a deployment guide covering how to set up environment variables as per your need – making it easier for future updates or any handoffs needed. Let’s take this project forward together! I assure you it will be within the stipulated timeline without compromising on quality or comprehensiveness!! Thank you!!!

@Feriver

Hello, I understand you need a fintech-grade Open Banking payment integration to enable direct bank-to-bank transfers without intermediaries. I have experience implementing PSD2-compliant flows, handling OAuth2 consent, secure payment initiation, incoming and outgoing transactions, and automatic digital receipt generation. I can design a production-ready microservice with REST/JSON endpoints, audit logging, idempotency keys, strong customer authentication, and webhook notifications for transaction status updates. Deliverables will include fully documented source code, a Postman/Swagger collection for all endpoints, a deployment guide with environment variables, and a demo walkthrough showing a full payment, payout, and receipt. The solution will be scalable, secure, and ready for integration with your front-end team. Deployment on AWS or GCP will be included, following best practices for security and reliability. Thanks, Asif

@juanestebana17

Hello, With extensive experience integrating open banking APIs within fintech environments, I am confident in my ability to seamlessly connect your application directly to banks' APIs, eliminating third-party layers for direct fund transfers. Could you specify which banks or regions the integration needs to support first? Thanks, Juan Aponte

@abhisaini0188

Hi, This is a solid Open Banking / PSD2 payment flow, and I have experience building bank-to-bank integrations with OAuth2, SCA, and secure transaction handling. My approach: I’ll build a secure, production-ready microservice that directly integrates with Open Banking APIs (e.g., via providers like TrueLayer/Tink or direct bank APIs), ensuring full compliance with PSD2 standards. Key implementation: • OAuth2 consent flow + Strong Customer Authentication (SCA) • Payment initiation (pay-ins & payouts) • Idempotent transaction handling + audit logs • Webhook system for real-time status updates • Digital receipt generation mapped to bank confirmations • Clean REST APIs (Swagger/Postman included) Tech stack: Node.js (NestJS) or Python (FastAPI) + PostgreSQL + AWS/GCP Deliverables: ✔ Payment microservice (secure & scalable) ✔ API documentation + test collection ✔ Deployment guide + env setup ✔ Demo of full payment lifecycle I focus on security, compliance, and reliability—critical for fintech systems like this. Let’s discuss your target banks/APIs and finalize architecture. With Regards!

@NaveenSingh09

Hello, With over four years of Python backend experience, I’ve built secure microservices for fintech. I understand the PSD2/Open Banking workflow: OAuth2 consent, direct bank API calls, and audit‑ready transaction handling. My approach is: 1️⃣ Design a FastAPI service that maps each Open Banking endpoint, using async HTTP clients for low latency. 2️⃣ Implement idempotent payment and payout routes, generating digital receipts stored in PostgreSQL. 3️⃣ Add webhook listeners for status updates and audit logs. 4️⃣ Package the service with Docker, CI/CD, and deploy to AWS Lambda or EC2, ensuring compliance with PCI‑DSS. 5️⃣ Deliver a Postman collection, Swagger spec, and a short deployment guide. I’ll record a demo showing a full payment flow, payout, and receipt generation. Let’s discuss milestones and timelines to get this gateway live. Best Regards Naveen Thakur

@webmasters486

Hi there, I’ve reviewed your project and understand you’re looking for a developer experienced with PSD2/Open Banking standards to implement a full payment-processing flow inside your fintech app. The goal is a custom-built gateway that communicates directly with banks’ APIs, handling OAuth2 consent, securely initiating payments, processing incoming and outgoing transactions, and generating digital receipts for each settled payment. I can deliver a production-ready solution with REST/JSON endpoints for your front-end team, complete with audit logs, idempotency keys, strong customer authentication, and webhook-style status notifications. The stack can leverage Node.js or Python with PostgreSQL and cloud deployment on AWS or GCP. I’ll provide source code for the microservice, a Postman/Swagger collection, deployment guide with environment template, and a demo walkthrough showing a payment, a payout, and the generated receipt. With hands-on experience integrating Open Banking APIs and building secure, scalable fintech workflows, I ensure a reliable, modular, and fully auditable solution. My focus is on seamless integration, compliance with PSD2 requirements, and smooth user experience, allowing your team to validate and deploy confidently without any gaps in security or functionality. Best regards, Muhammad Adil Portfolio: https://www.freelancer.com/u/webmasters486

@malkesh3m

⭐ Hello there, My availability is immediate. I read your project post on Python Developer for Fintech Open Banking Payment Integration. I am an experienced full-stack Python developers with skill sets in - Python, Django, Flask, FastAPI, Jupyter Notebook, Selenium, Data Visualization, ETL - React, JavaScript, jQuery, TypeScript, NextJS, React Native - NodeJS, ExpressJS - Web App Development, Data Science, Web/API Scrapping - API Development, Authentication, Authorization - SQLAlchemy, PostegresDB, MySQL, SQLite, SQLServer, Datasets - Web hosting, Docker, Azure, AWS, GPC, Digital Ocean, GoDaddy, Web Hosting - Python Libraries: NumPy, pandas, scikit-learn, tensorflow, etc. Please send a message So we can quickly discuss your project and proceed further. I am looking forward to hearing from you. Thanks

@ska234

Hi, I can build a secure Open Banking payment microservice that connects directly to PSD2-compliant bank APIs, handling OAuth2 consent, Strong Customer Authentication, and seamless payment/payout flows without third-party gateways. I’ll design clean REST endpoints with idempotency, webhook notifications, and full audit logging, backed by a robust Node.js/Python + PostgreSQL architecture ready for AWS/GCP deployment. The system will generate accurate digital receipts aligned with bank confirmations and ensure reliable transaction tracking end-to-end. You’ll receive production-ready code, complete API documentation, deployment guide, and a demo walkthrough showing live payment and payout flows.