You will get secure API integration for Stripe, AI, Google APIs and other

Let a pro handle the details

Buy Web Application Programming services from Alejandro, priced and ready to go.

Let a pro handle the details

Buy Web Application Programming services from Alejandro, priced and ready to go.

Project details

Need to connect your application with a third-party API but not sure how to do it safely and correctly?
Integrating APIs can be tricky. Authentification, data mapping, error handling, webhooks and unexpected responses can quickly turn into frustating problems if not handled properly.
That's where I can help.

I'm a full-stack developer with 8+ years of experience working with Angular, JavaScript, TypeScript, PHP and Python, building and maintaining real production applications. I've integrated payment systems, AI services, Google APIs and custom third-party solutions into web applications of all sizes.

I can help you integrate APIs such as:
 • Stripe/PayPal
 • Google APIs
 • AI APIs
 • CRM sysetms
 • REST APIs
 • Webhooks
 • Athentication systems (OAuth, JWT, API Keys)

My goal is to make your systems work together smoothly, securely and reliably.
I work carefully, communicate clearly and make sure your integration is stable and easy to maintain.
If you're not sure what you need yet, send me a mesage and we can review it together.
Programming Languages
PHP, JavaScript, TypeScript
Coding Expertise
Cross Browser & Device Compatibility, Performance Optimization, Security
What's included
Service Tiers Starter
$40
Standard
$120
Advanced
$258
Delivery Time 2 days 4 days 6 days
Number of Revisions
123
Design Customization
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Content Upload
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Responsive Design
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Source Code
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Optional add-ons You can add these on the next page.
Fast Delivery
+$20 - $100
Additional Revision
+$20

Frequently asked questions

Alejandro O.Status: Offline

About Alejandro

Alejandro O.Status: Offline
Software Engineer | Angular
Barcelona, Spain - 4:36 am local time
I'm Alejandro, a Full Stack Developer with 8+ years of experience building web apps for companies like Accenture and Atos — including critical infrastructure for Red Eléctrica de España.
I specialize in Angular, Vue, TypeScript, Node.js / NestJS and PHP backends. Clean code, scalable architecture, fast delivery.
What I can help you with:

Angular / Vue frontends
Node.js / NestJS or PHP REST APIs
Bug fixing & refactoring
Full stack apps from scratch

Steps for completing your project

After purchasing the project, send requirements so Alejandro can start the project.

Delivery time starts when Alejandro receives requirements from you.

Alejandro works on your project following the steps below.

Revisions may occur after the delivery date.

Requirement Analysis

I review your API documentation and understand your integration needs.

Architecture Planning

I design how the API will connect with your frontend and backend.

Review the work, release payment, and leave feedback to Alejandro.