I will develop custom API integrations, gateways and or automations

J
johnkwin
J
johnkwin
John K
5,0
5,0
Certaines informations sont présentées en anglais.

À propos de ce service

PLEASE CONTACT ME FIRST


Need a seasoned developer to seamlessly integrate APIs or fix broken scripts across any language or platform?


Im a full-stack developer with 15+ years of experience in software, systems, and networking. I specialize in backend API integrations and script corrections using Node.js, PHP, Python, and JavaScript and support nearly all major frameworks.


What I Offer:


API Integration Secure, scalable connections to:

Payment: Stripe, PayPal, Square

Marketplaces: Amazon, eBay

Social: Facebook, Instagram, TikTok

Mapping: Google Maps

Analytics: Google Analytics

Shipping: UPS, FedEx

VoIP: 3CX and more


Script Debugging & Optimization

Clean, correct, and optimize PHP/Python/JS scripts for speed, security, and reliability.


Cross-Platform Expertise

Whether Linux, Windows, shared hosting, or custom cloud Ive done it all.


Multi-language & Global Support

Translation APIs, multi-currency, internationalization no problem.


Languages & Tools:

Node.js · PHP · Python · MySQL


Why Choose Me?

I deliver working, production-ready integrations not just code snippets. Every project is handled with professionalism, clarity, and precision.

Découvrez John K

John K

Full Stack Developer, Complete Network and Computer Diagnostics

5,0(28)
  • DeÉtats-Unis
  • Membre depuisavr. 2015
  • Temps de réponse moy.14 jours
  • Dernière commande7 mois
  • Langues

    Anglais
Seasoned full-stack developer with over 15 years of experience in the dynamic realms of hardware, software, and complex business-level IT and networking. With a comprehensive skill set encompassing an array of programming languages including Javascript, HTML, CSS, Nodejs, Java, C/C++, PHP, MySQL Query, VB, and Python, at the forefront of technology innovation. Beyond coding prowess, John K boasts a deep understanding of hardware and software integration, coupled with extensive expertise in Linux distributions, all Windows operating systems, and Active Directory environments.

Autres services de Développement de logiciels I Offre

Avis

21 avis concernant ce service
5,0

(21)
(0)
(0)
(0)
(0)
Détails de la notation
  • Niveau de communication avec le freelance
    5
  • Qualité de la livraison
    5
  • Valeur de la livraison
    5
Trier par
Les plus pertinents
  • A

    axrmarketing

    Client récurrent

    US

    États-Unis

    5

    John K truly stands out in the Software Development field with his PROFESSIONALISM and CODE EXPERTISE. Exceptionally proactive in communication and remarkably polite, he effortlessly integrates into the team like a natural. BUG-FREE work and seamless cooperation make his service EXCEPTIONAL every time! 🙌

    50 $US-100 $US

    Prix

    6 jours

    Durée

    Utile?
    Oui
    Non
  • A

    axrmarketing

    Client récurrent

    US

    États-Unis

    5

    Responsiveness is unparalleled. John worked with me step by step. Professional to the max!

    Jusqu’à 50 $US

    Prix

    7 jours

    Durée

    Image d'échantillon de travail
    Utile?
    Oui
    Non
  • A

    axrmarketing

    Client récurrent

    US

    États-Unis

    5

    John is great, very responsive and insightful. Quick worker, and great at troubleshooting! He fixed an issue for me that two others were not able to get done and did so in a fraction of the time!

    50 $US-100 $US

    Prix

    4 jours

    Durée

    Utile?
    Oui
    Non
  • H

    harleycarterhkc

    Client récurrent

    US

    États-Unis

    5

    Thanks for the clarification and for reviewing everything.

    Jusqu’à 50 $US

    Prix

    1 jour

    Durée

    Utile?
    Oui
    Non
  • P

    plywr1

    Client récurrent

    US

    États-Unis

    5

    Continues to do great work. He anticipates the possible variables a user may experience and creates a straightforward UX. Always goes above and beyond.

    100 $US-200 $US

    Prix

    2 semaines

    Durée

    Utile?
    Oui
    Non
Avis

21 avis concernant ce service
5,0

(21)
(0)
(0)
(0)
(0)
Détails de la notation
  • Niveau de communication avec le freelance
    5
  • Qualité de la livraison
    5
  • Valeur de la livraison
    5
Trier par
Les plus pertinents
  • A

    axrmarketing

    Client récurrent

    US

    États-Unis

    5

    John K truly stands out in the Software Development field with his PROFESSIONALISM and CODE EXPERTISE. Exceptionally proactive in communication and remarkably polite, he effortlessly integrates into the team like a natural. BUG-FREE work and seamless cooperation make his service EXCEPTIONAL every time! 🙌

    50 $US-100 $US

    Prix

    6 jours

    Durée

    Utile?
    Oui
    Non
  • A

    axrmarketing

    Client récurrent

    US

    États-Unis

    5

    Responsiveness is unparalleled. John worked with me step by step. Professional to the max!

    Jusqu’à 50 $US

    Prix

    7 jours

    Durée

    Image d'échantillon de travail
    Utile?
    Oui
    Non
  • A

    axrmarketing

    Client récurrent

    US

    États-Unis

    5

    John is great, very responsive and insightful. Quick worker, and great at troubleshooting! He fixed an issue for me that two others were not able to get done and did so in a fraction of the time!

    50 $US-100 $US

    Prix

    4 jours

    Durée

    Utile?
    Oui
    Non
  • H

    harleycarterhkc

    Client récurrent

    US

    États-Unis

    5

    Thanks for the clarification and for reviewing everything.

    Jusqu’à 50 $US

    Prix

    1 jour

    Durée

    Utile?
    Oui
    Non
  • P

    plywr1

    Client récurrent

    US

    États-Unis

    5

    Continues to do great work. He anticipates the possible variables a user may experience and creates a straightforward UX. Always goes above and beyond.

    100 $US-200 $US

    Prix

    2 semaines

    Durée

    Utile?
    Oui
    Non