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John hellen
@john_hallen68
Professional Software Developer, API Integration and Automation
Nigeria
Englisch
Über mich
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!
Kompetenzen
John hellen
offline •
Durchschnittliche Antwortzeit: 1 Stunde
Meine Dienstleistungen
API & Integrationen
I will integrate rest API, python API, stripe API, twilio SMS, webhook, ai automation
API & Integrationen
I will integrate third party API, rest API, webhook setup in python, nodejs, PHP, mysql
Portfolio
Arbeitserfahrung
API Developer | Stripe & Payment Integration Expert | REST API Specialist
Freelancer.com • Selbstständig
Apr 2026 - Present • 1 mo
Professional API Developer specializing in API integration, REST API development, and payment gateway integration. Built and integrated Stripe API, Shopify API, Twilio SMS API, and OAuth2 authentication systems. Experienced in fixing API errors, webhook setup, automation, and third-party API integration. Developed scalable backend systems using PHP, Laravel, Python, Node.js, and MySQL. Delivered solutions for payment processing, SaaS platforms, and workflow automation using Zapier and AI integrations. Skills (Add these) API Integration REST API Development Stripe API Payment Gateway Integration Webhooks OAuth2 PHP Laravel Python Node.js MySQL Zapier Automation Twilio API Shopify API Backend Development API Bug Fixing
7 Bewertungen
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mlehrer
Wiederkehrender Kunde
Vereinigte Staaten
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...
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ashersadventure
Wiederkehrender Kunde
Kanada
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...
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ashersadventure
Wiederkehrender Kunde
Kanada
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.
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joan_render
Wiederkehrender Kunde
Vereinigte Staaten
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.
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joan_render
Wiederkehrender Kunde
Vereinigte Staaten
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