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I will integrate apis payments webhooks third party into saas
Alice G
About this gig
Is your SaaS or web app missing an API integration, payment gateway, webhook, or third-party service?
I can integrate APIs and external services into your existing SaaS or web application and make sure the data flows correctly between your systems.
I can help with:
- REST API integration and custom API connections
- Stripe, PayPal and payment gateway integration
- Webhooks and event-driven workflows
- OAuth, API keys and authentication
- CRM, email and third-party platform integrations
- Database and backend integrations
- Next.js, Node.js, Supabase and PostgreSQL integrations
- Zapier, Make and n8n connections
- Custom API development and troubleshooting
- Fixing failed API requests, webhook errors and integration bugs
I can also troubleshoot an existing integration that is returning errors, failing to send data, creating duplicate records, or not communicating correctly with your SaaS.
Whether you are launching a new SaaS product or improving an existing application, I will focus on reliable integration, clean implementation and proper testing.
Please message me before ordering with your app details, API documentation and the integration you need.
Get to know Alice G
Alice G
SaaS Developer, Full Stack Web Apps, MVPs, AI and API Integrations
- FromTurkey
- Member sinceAug 2026
- Avg. response time1 hour
Languages
English, Spanish, French, German, Italian, Arabic, Hindi, Dutch
I’m a SaaS and full-stack developer focused on turning ideas into reliable web applications, MVPs, and scalable digital products. I build secure user authentication, dashboards, databases, APIs, subscriptions, payment systems, third-party integrations, AI features, and business workflows. I work with modern technologies including Next.js, React, Node.js, TypeScript, Supabase, PostgreSQL, Stripe, OpenAI and other tools. Whether you’re launching a new SaaS or improving an existing application, I can help turn your requirements into a working product.
Other Software Development Services I Offer
FAQ
Can you integrate a third-party API into my existing SaaS?
Yes. I can connect REST APIs and third-party services to your existing SaaS, web application or backend.
Can you integrate Stripe or PayPal?
Yes. I can integrate payment gateways including Stripe and PayPal for payments, subscriptions and related webhook events.
Can you fix an API that is not working?
Yes. I can troubleshoot API requests, authentication problems, incorrect responses, webhook failures and data synchronization issues.
Can you work with an existing Next.js or React application?
Yes. I can integrate APIs into existing Next.js, React and other web applications depending on the current architecture.
Do you work with webhooks?
Yes. I can configure webhook endpoints, receive events, process data and connect webhook events to your application's workflow.
Can you integrate CRM or other business platforms?
Yes. I can connect supported CRM, payment, communication, automation and other third-party platforms through their APIs.
What do you need before starting?
I need your application details, API documentation, required workflow, relevant credentials or test keys, and a clear description of what you want the integration to accomplish.
