API Integration Engineer (Banking Integrations) - 22/06/2026 06:20 EDT

@kuldeepak05

Hi, I have strong experience in API integration and financial workflows, including secure REST/SOAP API implementations, payment processing, collections, payouts, reconciliation, webhooks, OAuth 2.0, JWT, and banking-grade security standards. I have worked on complex banking and fintech integrations involving transaction processing, account validation, virtual accounts, payment gateways, and automated financial workflows. My focus is on delivering reliable, secure, and well-documented integrations while coordinating seamlessly with stakeholders and third-party technical teams. I would be happy to discuss your banking integration requirements in detail and share relevant project experience that aligns with your needs. I am available to contribute on a part-time basis and can start immediately. Looking forward to connecting. Best Regards Kuldeepak T.

@ambientinfotech

Hi sir, I can manage share task in job summery with quality features and functions. I am expert self-motivated and hardworking Python developer and we can ensure complete customer satisfaction and 100% quality work. Let’s chat Thanks

@vipworks

As a seasoned API Integration Engineer with 4-5 years of experience, I have successfully integrated APIs with ICICI, Axis, and Citi Bank. My expertise in secure API connectivity and payment processing ensures compliant and seamless implementations. I'm ready to start RIGHT AWAY to meet your needs. Regards, Pooja

@zyeloncomputech

Hi sir, Thank you for giving opportunity for biding... we have gone through your requirements and we can do your API Integration Engineer (Banking Integrations) according to your exact requirements. Why You Need To Go With Us? And What Special you get with us. • Your vision = Our mission • Your idea + Our expertise = Winner on Web • Cutting edge web technology & design • Innovative, Cost effective & Customized service • Pragmatic Approach • Constant communication with clients • Consistent performance • On-time delivery • Maintenance of global quality standards • Your online business + Our experience = Your success Python, Data Analytics, Data Science Portfolio IoT Data Analysis for Dairy Refrigerator Temperature Monitoring Real-time Object Detection using OpenCV and YOLO Supply Chain Management System Enterprise Data Warehouse Implementation Cloud Data Lake Migration Web Application Development for Wind Turbine Performance Prediction Data Analytics Platform for Supply Chain Optimization AI Bill System AI Try Dress

@vishal1145

Your banking integration will fail compliance audits if you don't implement proper idempotency handling and transaction rollback mechanisms. ICICI and Axis both enforce strict retry policies that can cause duplicate debits if webhooks aren't designed correctly. Before architecting this, I need clarity on two things: What's your current transaction volume per day, and are you handling corporate banking APIs (cash management/treasury) or retail payment flows (UPI/NEFT)? The architecture differs significantly. Here's the technical approach: - ICICI/AXIS/CITI API INTEGRATION: Build OAuth 2.0 flows with token refresh logic, implement webhook signature verification to prevent spoofing, and design idempotency layers using Redis to handle network retries without duplicate transactions. - PAYMENT PROCESSING: Integrate virtual account creation, NEFT/RTGS/IMPS payout APIs with status polling mechanisms, and build reconciliation pipelines that match bank statements against internal ledgers within 15-minute windows. - PYTHON + REST API: Develop async request handlers using FastAPI to process 500+ concurrent payment requests, implement circuit breakers for bank API downtime, and log all API calls with correlation IDs for audit trails. - SECURITY COMPLIANCE: Enforce TLS 1.2+, rotate JWT tokens every 15 minutes, encrypt sensitive fields using AES-256 before transmission, and implement IP whitelisting as required by bank security teams. I've integrated banking APIs for 3 fintech platforms handling $2M+ daily transaction volume. Let's schedule a 20-minute call to discuss edge cases like partial payment failures and bank-side timeout handling before you commit to a build.

@Ranuka

Hello, I’m Ranuka, a Senior Integration Developer with 12+ years of experience in API development, banking integrations, and financial systems. Strong expertise in: Banking API integrations and payment workflows REST, SOAP, JSON, XML, Web Services OAuth 2.0, JWT, SSL/TLS, API security Collections, payouts, reconciliation, and account validation .NET, Node.js, PHP, and Python Postman, Swagger/OpenAPI, and API troubleshooting I have extensive experience integrating financial platforms, payment gateways, and secure transaction systems, working closely with third-party providers and enterprise APIs. Available to start immediately. Ranuka

@ixorawebmob

Hello, I’ve gone through your project details and this is something I can definitely help you with. I have 10+ years of experience in mobile and web app development, working with Flutter, Android, iOS, React, Node.js, and APIs. I focus on clean architecture, scalable code, and clear communication to ensure the project runs smoothly from start to finish. I will first review your requirements, suggest the best technical approach, and then proceed with development while keeping you updated at every stage. Here is my portfolio: https://www.freelancer.in/u/ixorawebmob I’m interested in your project and would love to understand more details to ensure the best approach. Could you clarify: 1. Do you need this for mobile, web, or both? 2. Do you already have UI/UX designs or should we create them? 3. Will there be any third-party API or payment gateway integration? 4. What is your expected timeline for completion? 5. Are there any reference apps or websites you like? Can you share the specific banking integrations you have prioritized for this project? Let’s discuss over chat! Regards, Arpit Jaiswal

@himanshu0818

Hello there, I can definitely help with your banking API integrations. I have 15+ years of experience in development and have worked on multiple financial and payment integrations. I’ve handled secure API connections, payment flows (collections, payouts, virtual accounts), and banking workflows using REST/SOAP, OAuth, and JWT. I also use AI in my workflow, which helps me deliver high-quality, secure integrations faster and more efficiently. I’m comfortable working with banking systems and can manage integration, troubleshooting, and coordination smoothly. Let’s chat, Himanshu

@vedaantTech

Hi, I am from Aligarh, Surendra Nagar but working in Indore and I am having 8+ years of experience. I’m interested in your API Integration Engineer requirement. I have hands-on experience building secure API integrations for financial platforms, including payment processing, account validation, collections, payouts, and reconciliation workflows. My experience includes working with REST and SOAP APIs, OAuth 2.0, JWT authentication, webhooks, SSL/TLS security, and API testing using Postman and Swagger. I’m comfortable troubleshooting transaction issues, coordinating with banking technical teams, and delivering reliable integrations with proper documentation. Looking forward to connecting. Pavan

@mahads31

Building successful and secure API integrations is my specialty. With a solid 4-5 years of experience in API Development, including integrating with ICICI Bank, Axis Bank, and Citi Bank, I am well-versed in both the technical requirements and the banking factors that come into play for seamless connections. I walkthroug

@modesorehari6

Hi, Have you already finalized the API specifications for ICICI Bank, Axis Bank, and Citi Bank, or are there additional banking partners that will be included? I have hands-on experience integrating banking APIs, secure payment workflows, REST/SOAP services, OAuth, JWT, webhooks, and transaction processing, including successful implementations with ICICI Bank, Axis Bank, and Citi Bank. Your project requires a reliable engineer to build and maintain secure banking integrations while supporting payment processing, reconciliation, and compliance with banking standards. My background includes developing scalable API integrations using Node.js, Python, and REST-based architectures, working with payment systems, authentication, API gateways, Postman, Swagger, and resolving complex integration issues in production. I can deliver clean, well-documented integrations, coordinate with bank technical teams when needed, and ensure the implementation is secure, maintainable, and thoroughly tested from development through deployment. I'd be happy to discuss your banking workflows, integration scope, and implementation timeline in more detail via chat. Looking forward to hearing from you!

@NEHABHAT92

As an experienced API Integration Engineer, I have successfully integrated APIs with various banks including Citi Bank, Axis Bank and ICICI Bank - the primary ones you are looking for in this role. With over 4 – 5 years of experience in API development and integration, I am a seasoned pro when it comes to using REST APIs, JSON, XML, SOAP and Web Services; all essential skills you require. My exposure to payment gateways, banking platforms and financial APIs is extensive - I have a profound understanding of the banking industry and will ensure uncompromising compliance with security standards and best practices. What makes me an excellent fit for this role is not only the variety of major bank integrations that I have accomplished but also my ability to troubleshoot any issues that arise during the process. My proficiency in languages such as Java, .NET., Node.js, Python and others will further streamline this integration process for you. Additionally, I am adept at using tools like Postman Swagger/OpenAPI, API Gateway and monitoring tools that will immensely contribute to successful API connectivity throughout various stages of your project. Lastly, I offer a range of additional benefits that significantly add more value to my candidacy like effective cost management of projects, cross-browser compatibility through responsive design approaches, free 3 months support for existing developments post-delivery along with cheap yet well-managed hosting and domain offe

@iimtpradeepdash

I’ve integrated with all three: ICICI, Axis, and Citi Bank APIs—handled corporate payouts, virtual accounts, reconciliation, and webhook flows. I ran production launches for multi-bank integration using Node.js (sometimes Python), always covering OAuth2/JWT, secure IP whitelisting, and full banking compliance. Most recently: I built payment collection and payout flows for a payroll SaaS, with IMPS/NEFT/RTGS, transaction status sync, and exception handling via webhook callbacks. This included handling bank-side API changes and coordinating with their technical teams for go-live. My work is production-ready—documented API specs, Postman collections, custom connectors, and direct integration troubleshooting with bank support if needed. Which modules do you need first—payouts, collections, or virtual accounts? I can start this week if the role fits. Pradeep

@gauravl3

With over 5 years in the industry, my team and I have a wealth of experience in API development and integration. We bring with us a successful track record of working with major banks, including ICICI Bank, Axis Bank, and Citi Bank, making us an ideal fit for your API Integration Engineer role. Our expertise does not end with bank APIs; we are highly proficient in REST, JSON, XML, SOAP, and have proven experience in denominating complex web services into simple yet cohesive solutions. Moreover, we have a strong understanding of banking security standards and best practices which is vital for this role. We consistently stay updated on the latest trends and protocols such as OAuth 2.0, SSL/TLS, JWT, API encryption etc., to provide secure and efficient API integration. In addition to technical proficiency, we are skilled in working within deadlines and ensuring seamless collaboration between different teams. Time management is one of our core strengths that enable us to deliver projects with precision ensuring fully functional solutions that meet all project requirements. Our mission is to design and implement clean scalable solutions that provide real business value while being proactive about challenges. This combination of technical competence plus efficient execution makes us confident that we are the best candidate for the job at hand

@shailender18

As a seasoned API Integration Engineer with over 4 years of hands-on experience, I believe I'm the perfect fit for your project. My career journey not only encapsulates building scalable web and mobile applications, but also includes constructing efficient workflows utilizing n8n and integrating AI solutions into systems. This amalgamation of skills aligns seamlessly with your project's requirement of secure API connectivity and payment process integration. One of the biggest assets I bring to the table is my extensive experience in developing and maintaining integrations with banking and financial institution APIs. Having successfully completed similar projects, including integrating APIs with ICICI Bank, Axis Bank, Citi Bank, and more in the past; I have a comprehensive understanding of the intricacies involved in banking API integration and their subsequent troubleshooting. Moreover, my ability to deliver production-ready systems with clean architecture and strong security greatly complements the high-security standards prevalent in the banking industry.

@alluankit01

Hi, I can support this part-time API Integration Engineer role for secure banking and financial API integrations, including ICICI Bank, Axis Bank, Citi Bank, and similar banking platforms. I have hands-on experience with banking API workflows such as collections, payouts, virtual accounts, account validation, reconciliation, payment status updates, webhooks, and transaction troubleshooting. I’m comfortable working with REST/SOAP APIs, JSON, XML, OAuth 2.0, JWT, SSL/TLS, API encryption, Postman, Swagger/OpenAPI, and secure production connectivity. The best solution is to first review each bank’s API kit, authentication method, certificates, callback/webhook requirements, sandbox credentials, and transaction flow. Then I’ll implement clean integration modules, validate request/response handling, add logging and error tracking, coordinate with bank technical teams, and prepare clear technical documentation for future maintenance. I’m comfortable with Python, Node.js, Java/.NET-style API workflows, payment processing, banking security standards, reconciliation logic, API gateways, and monitoring tools. Deliverables will include: * Banking API integration * Secure authentication setup * Payment/collection/payout workflows * Webhook handling * API testing and troubleshooting * Documentation and handover notes * Coordination with bank teams Best regards Ankit

@spodstechno

Hello, which language and runtime have you mainly used for these banking integrations, and did you personally handle the full cycle from auth (OAuth/JWT/SSL) through transaction reconciliation with at least ICICI, Axis, and Citi in production? I've got 12+ years across API-heavy systems and secure integrations, and I've worked on payment and workflow plumbing where reliability and auditability matter. If you share your exact target stack and the typical transaction types you need first (collections, payouts, virtual accounts, validation, reconciliation), I'll map the integration approach, error handling, and monitoring so bank teams can troubleshoot fast. Send your resume and any API specs you have, and we'll quickly line up a part-time plan.

@thinkbotictech

Hi, I have hands-on experience with banking API integrations, including payment collections, payouts, virtual accounts, reconciliation workflows, webhook handling, and secure API connectivity using REST/SOAP, OAuth, JWT, and SSL/TLS standards across fintech platforms. Questions: 1. Which specific banking APIs are in scope (Collections, Payouts, Virtual Accounts, Account Validation, FASTag, UPI, etc.) for ICICI, Axis, and Citi Bank? 2. Is this a new integration project, or do you need support and enhancement for existing banking integrations already in production? if looking for expert then lets connect (7 yrs experience in Fintech api integration)

@mubashir021

Hello, I see you're in need of an API Integration Engineer who can connect with ICICI Bank, Axis Bank, and Citi Bank. I am Mubashir, a Full-Stack Developer, Engineer, and UI/UX Specialist with 6+ years of experience integrating banking APIs and financial services platforms. - I will analyze existing banking APIs from ICICI Bank, Axis Bank, and Citi Bank to understand their requirements and documentation. - I will design and develop necessary API connections, implementing secure authentication protocols like OAuth 2.0 and SSL/TLS. - I will integrate payment solutions, ensuring compliance with banking security standards. - I will thoroughly test API integrations to troubleshoot any connectivity or transaction processing issues. - I will prepare comprehensive technical documentation and integration guides. My Portfolio: https://www.freelancer.com/u/mubashir021 Even if you're not ready to decide, I'll provide a FREE detailed quotation and project proposal with a suggested roadmap at no cost. Mubashir Ahmed