I will develop or fix complex PHP backend systems and API integrations


Level 1
About this gig
Is your PHP system not working as expected?
Do you need a reliable backend solution that actually works?
I help businesses build, fix and improve PHP systems from custom scripts to complex backend logic.
Im a backend developer focused on real-world problems: fixing broken code, completing unfinished projects, and building stable solutions inside existing systems.
When needed, I also use Python for automation, data processing and advanced logic.
I dont just write code, I make sure everything works correctly within your system.
What I can do for you:
- Build custom backend logic and features
- Fix buggy or broken PHP code
- Complete unfinished projects
- Automate processes and workflows
- Optimize MySQL queries and performance
- Review and improve existing code
My approach:
- analyze your system
- identify the real issue
- implement a clean solution
- test everything before delivery
Note: This Gig covers specific features or integrations not full platforms. For complex systems, contact me for a custom quote.
Send me a quick message about your needs and Ill provide the best strategy and a clear quote.
Get to know Sebastiano C
Custom WordPress Solution and PHP Developer Clean Code That Works
Level 1
- FromItaly
- Member sinceAug 2025
- Avg. response time1 hour
- Last delivery1 month
Languages
English, Italian
My Portfolio
Other Software Development Services I Offer
FAQ
Do you work on existing code?
Yes, most of my work involves fixing or improving existing systems.
Do you handle complex projects?
Yes, but large systems require a custom offer after analysis.
Do you work with PHP 8.x?
Yes, I develop and test on PHP 8.x and can maintain backward compatibility if needed.
Can you integrate with external APIs?
Absolutely – Stripe, PayPal, Mailchimp, HubSpot, Notion, Google APIs, and more. You’ll just need to provide your API key and documentation.
Can I see examples of your work?
I can share anonymized snippets and screenshots in chat.
Do you ensure code security?
Yes input validation, sanitization, prepared statements, and proper error/log handling.
What if the requirements change mid-project?
No problem , I’ll assess the impact and suggest a package upgrade or extra as needed.
Can you develop a complete backend system or admin panel?
This Gig is focused on individual features or integrations. For complex platforms, please send your documentation so I can evaluate and prepare a tailored offer.
Can you estimate before ordering?
Yes, but I need to review your requirements first.
2 reviews for this Gig
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
A allenatorenet
Repeat Client

Italy
Sebastiano did a fantastic job! He quickly identified and resolved the issues I was having with the PHP update. Highly recommended for his technical skills and efficiency. Great communication and very professional.
$200-$400
Price
10 days
Duration
Helpful?A allenatorenet
Repeat Client

Italy
Sebastiano is a true professional. He fixed some problems on my website with great precision and technical expertise. The communication was excellent, and the results were flawless. If you need someone competent to handle complex issues, he is the right person. Highly recommended!
$600-$800
Price
7 days
Duration
Helpful?
2 reviews for this Gig
| (2) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
A allenatorenet
Repeat Client

Italy
Sebastiano did a fantastic job! He quickly identified and resolved the issues I was having with the PHP update. Highly recommended for his technical skills and efficiency. Great communication and very professional.
$200-$400
Price
10 days
Duration
Helpful?A allenatorenet
Repeat Client

Italy
Sebastiano is a true professional. He fixed some problems on my website with great precision and technical expertise. The communication was excellent, and the results were flawless. If you need someone competent to handle complex issues, he is the right person. Highly recommended!
$600-$800
Price
7 days
Duration
Helpful?

