I will integrate rest API, python API, stripe API, twilio SMS, webhook, ai automation

J
john_hallen68
J
john_hallen68
John hellen
5.0
5.0
integrate rest API, python API, stripe API, twilio SMS, webhook, ai automation
Full Screen
integrate rest API, python API, stripe API, twilio SMS, webhook, ai automation
Full Screen
integrate rest API, python API, stripe API, twilio SMS, webhook, ai automationintegrate rest API, python API, stripe API, twilio SMS, webhook, ai automation

What people loved about this freelancer

mlehrer
US

United States

5
5

Excellent experience working with this freelancer. The project involved building a fairly nuanced SMS-based accountability and reminder system using Node.js,...

ashersadventure
CA

Canada

5
5

John Hellen is one of the best developers I’ve worked with. He handled my API integration flawlessly secure authentication, clean implementation, and everything...

ashersadventure
CA

Canada

5
5

John Hellen exceeded my expectations. Fast and reliable API integration with secure setup and full testing. Everything worked perfectly. Highly recommended for REST API, Stripe, Twilio, and backend automation.

joan_render
US

United States

5
5

John Hellen delivered a fast and fully working API integration. Great communication, secure implementation, and smooth results. Perfect for urgent backend, webhook, and automation projects.

About this gig

Are you struggling to connect APIs, automate workflows, or integrate payment and SMS into your app or website?


I help businesses integrate APIs, automate systems, and build reliable backend solutions that save time and scale your product.


Whether you need REST API integration, Python API development, Stripe payments, Twilio SMS API, or webhook automation, I can implement secure and scalable solutions for your project.


Services Offered

  • REST API integration
  • Python API development
  • Stripe payment integration
  • Twilio SMS API integration
  • Webhook automation
  • Third-party API connection
  • Backend development for web or mobile apps


Tech Stack

Python, FastAPI, Django, Flask, REST API, Webhooks, Stripe API, Twilio SMS API, JSON, OAuth, Node.js.


Why Choose Me

  • Clean and scalable backend code
  • Secure API integrations
  • Fast communication and support
  • Solutions built around your business needs


If you need API integration, Stripe payment setup, Twilio SMS automation, or custom backend development, feel free to contact me before placing an order so we can discuss your project.

  • Expertise

    • Algorithms & Data structures
    • Debugging
    • Performance
    • Design
    • Testing procedures

  • Programming language

    • Python

  • Frontend framework

    • Backbone.js
    • Ember.js
    • Flutter
    • Next.js
    • React.js

  • Backend framework

    • Django
    • CakePHP
    • Express.js
    • Next.js
    • Node.js

Get to know John hellen

John hellen

Professional Software Developer, API Integration and Automation

5.0(7)
  • FromNigeria
  • Member sinceMar 2026
  • Avg. response time1 hour
  • Last delivery6 days

  • Languages

    English
Struggling with API integration, Stripe errors, or payment issues? Need an API developer to connect apps, fix bugs, or automate workflows? I solve backend problems fast. I specialize in REST API development, Stripe API integration, Shopify API, Twilio SMS, OAuth2, and custom API solutions tailored to your business needs. I’m John, an experienced API developer skilled in PHP, Laravel, Python, Node.js, MySQL, webhooks, Zapier automation, and AI integrations. Let’s build scalable, secure systems that grow your business. Contact me for free conversation flow!

My Portfolio

Reviews

7 reviews for this Gig
5.0

(7)
(0)
(0)
(0)
(0)
Rating Breakdown
  • Seller communication level
    5
  • Quality of delivery
    5
  • Value of delivery
    5
Sort By
Most relevant
  • M
    image-docs

    mlehrer

    Repeat Client

    US

    United States

    5

    Excellent experience working with this freelancer. The project involved building a fairly nuanced SMS-based accountability and reminder system using Node.js, Twilio, MongoDB, scheduling logic, inbound/outbound SMS handling, and a web-based configuration/dashboard flow. What stood out most was the freelancer’s...

    $400-$600

    Price

    13 days

    Duration

    Helpful?
    Yes
    No
  • A

    ashersadventure

    Repeat Client

    CA

    Canada

    5

    John Hellen is one of the best developers I’ve worked with. He handled my API integration flawlessly secure authentication, clean implementation, and everything fully tested and working. Communication was fast and professional, and he delivered exactly what was needed without issues. If you need reliable...

    Up to $50

    Price

    4 days

    Duration

    Helpful?
    Yes
    No
  • A

    ashersadventure

    Repeat Client

    CA

    Canada

    5

    John Hellen exceeded my expectations. Fast and reliable API integration with secure setup and full testing. Everything worked perfectly. Highly recommended for REST API, Stripe, Twilio, and backend automation.

    Up to $50

    Price

    4 days

    Duration

    Helpful?
    Yes
    No
  • J
    image-docs

    joan_render

    Repeat Client

    US

    United States

    5

    John Hellen delivered a fast and fully working API integration. Great communication, secure implementation, and smooth results. Perfect for urgent backend, webhook, and automation projects.

    Up to $50

    Price

    2 days

    Duration

    Helpful?
    Yes
    No
  • J
    image-docs

    joan_render

    Repeat Client

    US

    United States

    5

    Great seller! Would recommend him to anyone

    Up to $50

    Price

    2 days

    Duration

    Helpful?
    Yes
    No
Reviews

7 reviews for this Gig
5.0

(7)
(0)
(0)
(0)
(0)
Rating Breakdown
  • Seller communication level
    5
  • Quality of delivery
    5
  • Value of delivery
    5
Sort By
Most relevant
  • M
    image-docs

    mlehrer

    Repeat Client

    US

    United States

    5

    Excellent experience working with this freelancer. The project involved building a fairly nuanced SMS-based accountability and reminder system using Node.js, Twilio, MongoDB, scheduling logic, inbound/outbound SMS handling, and a web-based configuration/dashboard flow. What stood out most was the freelancer’s...

    $400-$600

    Price

    13 days

    Duration

    Helpful?
    Yes
    No
  • A

    ashersadventure

    Repeat Client

    CA

    Canada

    5

    John Hellen is one of the best developers I’ve worked with. He handled my API integration flawlessly secure authentication, clean implementation, and everything fully tested and working. Communication was fast and professional, and he delivered exactly what was needed without issues. If you need reliable...

    Up to $50

    Price

    4 days

    Duration

    Helpful?
    Yes
    No
  • A

    ashersadventure

    Repeat Client

    CA

    Canada

    5

    John Hellen exceeded my expectations. Fast and reliable API integration with secure setup and full testing. Everything worked perfectly. Highly recommended for REST API, Stripe, Twilio, and backend automation.

    Up to $50

    Price

    4 days

    Duration

    Helpful?
    Yes
    No
  • J
    image-docs

    joan_render

    Repeat Client

    US

    United States

    5

    John Hellen delivered a fast and fully working API integration. Great communication, secure implementation, and smooth results. Perfect for urgent backend, webhook, and automation projects.

    Up to $50

    Price

    2 days

    Duration

    Helpful?
    Yes
    No
  • J
    image-docs

    joan_render

    Repeat Client

    US

    United States

    5

    Great seller! Would recommend him to anyone

    Up to $50

    Price

    2 days

    Duration

    Helpful?
    Yes
    No

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