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I will do api development rest api integration stripe integration website app php api
Harper
Level 1
About this gig
A powerful application depends on seamless API integration, secure data flow, and reliable backend performance. Poor integrations can cause errors, slow performance, and lost revenue. That's where I come in.
I'm Harper, a professional API developer specializing in REST API development, APl integration, and secure system connectivity. I build clean, scalable, and well structured APIs that connect your website or app to third party services with precision.
From p a yment gateways to AI and automation tools, every integration is optimized for speed, security, and long term reliability.
What I Offer:
- Custom APl development (REST API)
- APi integration for web & mobile apps
- Stripe & payment gateway integration
- ChatGPT & AI API integration
- PHP API, Node.js & backend solutions
- Secure authentication (JWT, OAuth)
- Webhooks, automation & real time data
- API debugging, testing & optimization
Why Choose Me:
- Clean, scalable & well documented code
- Strong backend & integration expertise
- Secure, reliable & high performance APIs
- Clear communication & fast delivery
Connect your systems and unlock powerful functionality. Message me now or place your order to get started.
Get to know Harper
Harper
Full Stack Developer Who Builds Smart Systems
Level 1
- FromUnited States
- Member sinceAug 2025
- Avg. response time1 hour
- Last delivery3 weeks
Languages
English, French, Spanish
Hi!
I’m Harper, a full stack developer who builds systems that help businesses run smoother. I create custom websites, AI chatbots, WhatsApp automation, and backend workflows that reduce manual work and improve results. My tech stack are: React, Node.js, PHP, HTML5, JavaScript, Nextjs, CSS, APIs, Airtable, and n8n. I've completed many complex functional websites and web applications. I can create modern and eye catching custom websites or web applications based on your needs and requirements. Let's make something different together.
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Other Software Development Services I Offer
FAQ
What types of APIs can you develop or integrate?
I work with REST APIs, third party APIs, p ay ment gateways (Stripe, PayPal), AI APIs (ChatGPT), CRM APIs, and custom APIs for web and mobile applications.
Do you build custom APIs from scratch?
Yes, I develop fully custom, scalable REST APIs tailored to your application’s functionality and business requirements.
Can you integrate APIs into my existing website or app?
Absolutely. I can seamlessly integrate APIs into your current system without disrupting functionality.
Do you integrate p a yment gateway like Stripe?
Yes, I specialize in secure p a yment gateway integrations including Stripe and other p a yment systems.
Can you integrate AI APIs like ChatGPT?
Yes, I can integrate AI APIs such as ChatGPT for automation, chatbots, content generation, and smart workflows.
What technologies do you use for API development?
I use PHP, Node.js, and other backend technologies, along with secure authentication methods like JWT and OAuth.
Will the API be secured?
Yes, I implement strong security practices including authentication, authorization, validation, and error handling to ensure safe data flow.
Can you fix or optimize an existing API?
Yes, I can debug, optimize performance, fix errors, and improve the efficiency of your existing API.
Do you provide API documentation?
Yes, I provide clear and well structured documentation to help you or your developers understand and use the API easily.
Do you support real time data and automation?
Yes, I implement webhooks, automation workflows, and real time data processing where required
