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English
$
USD
I will integrate stripe payment gateways and custom apis
Hasanta
Level 2
5.0
5.0
Gig Summary
What people loved about this freelancer
jamesgorham509
United States
We’re extremely happy with the results! Our web designer did an excellent job bringing our ideas to life and creating a website that looks professional, polished,...
jamesgorham509
United States
I tried to find a web designer that could do a few functions and no one could until I reached out here. I got my project finished ahead of schedule, and better than I had hoped for. Thank you.
jamesgorham509
United States
I had an entire section in the website created and adjusted so it looks better than I had hoped. The functionality of it looks fantastic. Thanks so much.
About this gig
Are you looking for a secure payment gateway or API integration for your web app? I specialize in robust Stripe API and custom backend architectures that allow your business to process payments reliably and scale without limits.
What I Offer:
- Stripe Integration: Custom Checkout, Stripe Connect for marketplaces, Subscriptions, and Webhooks.
- Custom API Development: Secure REST API endpoints for complex web applications.
- Backend Integrations: Seamless Firebase backend setup and third-party API connections.
- Authentication & Security: Implementation of JWT, OAuth, and secure API keys.
Why Choose Me?
- Senior Software Engineer with over 8 years of end-to-end development experience.
- Focus on highly secure, scalable, and well-documented code.
- Complete sandbox testing environment provided before going live.
How It Works:
- Consultation: We discuss your specific web app requirements.
- Development: I build the solutions within a secure test environment.
- Delivery: You receive the fully tested integration, ready for deployment.
Let's build a high-performance backend for your application. Contact me today to get started!
Get to know Hasanta
Hasanta
End to End Web App Development, E commerce, and API Specialist
Level 2
- FromSri Lanka
- Member sinceSep 2016
- Avg. response time1 hour
- Last delivery6 days
Languages
Sinhala, English
I'm a Senior Software Engineer with 8+ years of experience building complex websites and web applications. I specialize in robust platforms like fundraising sites, multi-step interactive UIs, e-commerce, and secure payment flows via Stripe Connect. I also build cutting-edge AI-assisted tools, including LLM and Playwright agents.
I deliver end-to-end solutions—from planning database architectures to deploying scalable apps on modern cloud platforms. Send me a message or book a consultation, and let’s discuss how to achieve your goals!
My Portfolio
Other Software Development Services I Offer
FAQ
What do you need from me to start the project?
To get started, I will need a clear list of your payment flow requirements, access to your Stripe Dashboard (either as a team member or your API test keys), and access to your web app's codebase or hosting environment (like your Firebase console) to integrate the backend.
Can you handle multi-vendor marketplaces using Stripe Connect?
Absolutely. I specialize in complex architectures, including Stripe Connect Destination Charges and Separate Charges and Transfers. I can map out the flow so that your platform automatically routes payments to your vendors while securely deducting your platform fees.
Will my customers' credit card information be secure?
Yes. I follow strict security best practices. Card data is never stored directly on your database. Instead, I utilize Stripe's secure tokens and customized Stripe Checkout sessions, ensuring your web application remains fully PCI-compliant.
Do you test the integration before it goes live?
Yes! Every integration is built and thoroughly tested in Stripe’s Sandbox mode. I will provide you with test card details so you can personally verify the entire checkout, subscription, or marketplace flow before we switch your live API keys on.
What technologies and frameworks do you work with?
I build robust backend solutions using modern stacks, including Node.js, Next.js, React, TypeScript, PHP, and Laravel. I am also highly experienced in setting up and integrating Firebase as a backend database for your payment architecture.
My project scope doesn't perfectly fit your packages. What should I do?
Every web application is unique! If you need a specific number of custom API endpoints or a highly tailored payment flow, please send me a message with your requirements. I will provide a quick consultation and a custom quote tailored to your exact needs.
Reviews
24 reviews for this Gig
| (23) | ||
| (1) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
J jamesgorham509
United States
Ongoing collaborationWe’re extremely happy with the results! Our web designer did an excellent job bringing our ideas to life and creating a website that looks professional, polished, and exactly how we envisioned it. He was easy to work with, responsive to our requests, and patient with all the details and changes along...
$200-$400
Price
5 days
Duration
A 
Seller's Response
Helpful?J jamesgorham509
United States
Ongoing collaborationI tried to find a web designer that could do a few functions and no one could until I reached out here. I got my project finished ahead of schedule, and better than I had hoped for. Thank you.
$600-$800
Price
3 weeks
Duration
A Seller's Response
Helpful?J jamesgorham509
United States
Ongoing collaborationI had an entire section in the website created and adjusted so it looks better than I had hoped. The functionality of it looks fantastic. Thanks so much.
$100-$200
Price
3 weeks
Duration
A Seller's Response
Helpful?J jamesgorham509
United States
Ongoing collaborationFantastic results. Very professional, great quality with fast results.
$50
Price
2 days
Duration
A Seller's Response
Helpful?J jamesgorham509
United States
Ongoing collaborationI had a large section of website added on, with Manny moving parts and pages, and I couldn't be more pleased with the final results. Very efficient with amazing quality that is extremely professional looking.
$600-$800
Price
4 weeks
Duration
A Seller's Response
Helpful?
Reviews
24 reviews for this Gig
| (23) | ||
| (1) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
J jamesgorham509
United States
Ongoing collaborationWe’re extremely happy with the results! Our web designer did an excellent job bringing our ideas to life and creating a website that looks professional, polished, and exactly how we envisioned it. He was easy to work with, responsive to our requests, and patient with all the details and changes along...
$200-$400
Price
5 days
Duration
A Seller's Response
Helpful?J jamesgorham509
United States
Ongoing collaborationI tried to find a web designer that could do a few functions and no one could until I reached out here. I got my project finished ahead of schedule, and better than I had hoped for. Thank you.
$600-$800
Price
3 weeks
Duration
A Seller's Response
Helpful?J jamesgorham509
United States
Ongoing collaborationI had an entire section in the website created and adjusted so it looks better than I had hoped. The functionality of it looks fantastic. Thanks so much.
$100-$200
Price
3 weeks
Duration
A Seller's Response
Helpful?J jamesgorham509
United States
Ongoing collaborationFantastic results. Very professional, great quality with fast results.
$50
Price
2 days
Duration
A Seller's Response
Helpful?J jamesgorham509
United States
Ongoing collaborationI had a large section of website added on, with Manny moving parts and pages, and I couldn't be more pleased with the final results. Very efficient with amazing quality that is extremely professional looking.
$600-$800
Price
4 weeks
Duration
A Seller's Response
Helpful?
