Browse categories
Explore
Fiverr Pro
English
$
USD
John K
@johnkwin
Full Stack, Systems and Software Engineering
United States
English
About me
I'm a full-stack developer and IT systems engineer with 15+ years of experience in software, hardware, networking, and business technology. I build production-ready web apps, backend systems, databases, automations, and integrations.
My skills include JavaScript, HTML, CSS, Node.js, Java, C/C++, PHP, Python, VB, MySQL, APIs, Linux, Windows Server, Active Directory, networking, and troubleshooting.
I understand the full stack from UI and backend to databases, servers, operating systems, networks, and business workflows. I build maintainable solutions for real business environments.
John K
Offline •
Average response time: 1 hour
See my services
API & Integrations
I will develop custom API integrations, gateways and or automations
Scripting
I will write scripts for web automation, scraping and data analysis
28 Reviews
| (28) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
1-5 out of 28 Reviews
Sort By
Most relevant
axrmarketing
Repeat Client
United States
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! 🙌
Helpful?
axrmarketing
Repeat Client
United States
Responsiveness is unparalleled. John worked with me step by step. Professional to the max!
Helpful?
axrmarketing
Repeat Client
United States
Super fast and professional. Really knows what he's doing. Will continue to work with him in the future!
Helpful?
axrmarketing
Repeat Client
United States
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!
Helpful?
harleycarterhkc
Repeat Client
United States
Thanks for the clarification and for reviewing everything.
Helpful?
