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Fiverr Pro
English
$
USD
I will provide expert c cpp and python payment system development
Subrat S
About this gig
With 14 years of enterprise experience in cards and payments, I engineer robust backend architectures that handle critical transactions flawlessly. Fintech leaves zero room for error. I ensure your platform is secure, fast, and reliable.
My Expertise:
- Backend: C, C++, Python, & Java for highly scalable processing.
- Protocols: ISO 8583 parsing, TCP/IP sockets, and switching.
- Frameworks: Enterprise jPOS framework building and setup.
- Cloud: Secure deployment, AWS SDK integration, and EC2 management.
- Architecture: Multi-threading optimizations for heavy transaction loads.
What I Deliver:
- Custom payment gateway integrations (Stripe, PayPal, standard APIs).
- Complex C/C++ or Python transaction routing and processing modules.
- Secure jPOS environment compilation and custom configuration.
- Robust backend APIs specifically tailored for modern fintech apps.
Why Choose Me? You get a senior developer who knows the full payment lifecycle. I write clean, documented code meeting strict financial standards.
Please message me before ordering to discuss your project!
Get to know Subrat S
Subrat S
Technical Lead
- FromIndia
- Member sinceJun 2026
Languages
English
I am a Software Developer with over 14 years of experience in designing and maintaining high-performance solutions in the Cards and Payments industry. I am proficient in C, C++, and Unix/Linux, with specific expertise in credit and debit card transaction processing, ISO 8583, and EMV standards. I specialize in transforming complex business requirements into scalable, reliable software solutions.
FAQ
What do you need from me to get started?
Please provide your detailed technical requirements, API documentation for any gateways involved, your target infrastructure setup, and any specific compliance needs. Send me a message, and we can discuss the exact architecture before you place an order.
Do you accept large, complex enterprise projects?
Yes, I do. For large-scale custom backend systems, we can utilize Fiverr's Milestone workflow. This allows us to break the project down into manageable phases (e.g., Architecture Design, Gateway Integration, Stress Testing) to ensure smooth delivery.
Can you deploy the solution to our cloud infrastructure?
Absolutely. I am highly experienced with cloud deployment, particularly on AWS. I can manage EC2 instances, integrate cloud SDKs, and ensure your payment infrastructure is securely configured for the cloud.
How do you handle high transaction volumes?
Performance is critical in the cards and payments domain. I architect solutions utilizing multithreading and concurrency optimizations to ensure your backend can process heavy transaction loads efficiently without bottlenecks.
Which programming languages do you use for backend development?
I specialize in low-level, high-performance systems programming using C, C++, and Python. I am also highly experienced with Java, particularly for enterprise payment frameworks, and can adapt to your specific tech stack.
Do you have experience with ISO 8583 messaging and the jPOS framework?
Yes, I have extensive experience building, configuring, and troubleshooting custom jPOS environments. I am highly proficient in parsing, packing, and routing ISO 8583 financial messages for secure payment switching.
