Switch to English?
Yes
Переключитись на українську?
Так
Переключиться на русскую?
Да
Przełączyć się na polską?
Tak
Post your project for free and start receiving proposals from freelancers within minutes after publication!

PHP Adding functionality

Translated2171 USD

Applications 1

Application viewing is only available registered users.
  1. 1117    4  0
    15 days2171 USD

    ✨Hi there,

    I can help expand your invoicing system with all the required JPK, KSeF and ZUS functionalities. My experience includes building compliant financial integrations and multilingual interfaces in PHP frameworks. Let's implement these features cleanly while keeping your existing system stable.

    I'll be glad to discuss the technical approach.
    Tamara⭐

  2. 319  
    1 day2171 USD

    Good afternoon - we develop frameworks on Laravel and mobile applications on iOS and Android turnkey.
    Projects:
    1. Good afternoon, we are ready to fulfill your order turnkey.
    We develop websites on PHP and mobile applications on iOS and Android.
    We have experience in creating CRM/ERP systems.
    Ready to fulfill your order turnkey.
    Good afternoon, we develop websites on WordPress and mobile applications on iOS and Android. The total development experience is 7 years. Ready to fulfill your order turnkey.
    1. Projects
    https://berkanaplus.com.ua/ - This site was migrated and the server was configured.
    2. https://leondesign.kyiv.ua/
    PHP version updates and plugin updates.
    3. https://peg.com.ua/
    Development of a new module for the site for dynamic updating of product prices.
    https://uvali.com.ua/
    Configuration of a dedicated VPS server.

  3.    1  2   3
    8 days2171 USD

    Hello. I have experience working with PHP+CodeIgniter 4, integrating systems based on XML (JPK, KSeF, ZUS), and expanding the functionality of web applications to meet the requirements of tax authorities. I am familiar with MF specifications, capable of implementing document generation, sending, synchronization, and setting up multilingual support with currency support. I am ready to carefully review your technical specifications and execute everything as accurately and on time as possible.

  4. 122  
    35 days2306 USD

    I’ve reviewed the PDF and understand the required enhancements for your invoicing platform, including:

    Crucial Modules to Put in Place:
    Jednolity Plik Kontrolny (JPK File Support):

    XML generation for JPK_V7M/V7K, JPK_FA, JPK_MAG, and JPK_PKiR

    Calculation and manual editing options before generation

    PDF generation of JPK declarations

    Integration with KSeF (Krajowy System e-Faktur):

    Logging in via trusted profile or qualified e-signature

    Import/export XML with KSeF

    Read/convert KSeF XML into your format

    ZUS Declaration and Submission:

    Generate declarations from DB

    Submit to Tax Office (US)

    Extend/verify current implementation

    Multilingual and Currency Support:

    Invoice language selection (e.g., PL, EN, DE)

    Dual-language invoices (e.g., PL+EN)

    Multi-language UI with translation system

    Additional Requirements:

    Full XML compliance with Ministry of Finance standards

    Seamless integration into current UI and backend structure

  5. 463    6  0
    3 days2171 USD

    Good afternoon.
    I am interested in your project, I have extensive experience in development on CodeIgniter.
    Feel free to contact me, I hope for cooperation.

  6. 162  
    1 day2171 USD

    Hello.
    I can implement everything according to your requirements. I will do quality work, I have extensive experience.

  7. 1618    18  1   1
    10 days2171 USD

    Hello.

    I can implement the task. I have experience in similar projects. The deadlines and cost are approximate - need to discuss the details.
    Write, I will do everything quickly and efficiently.

  8. 1768    17  1
    24 days2171 USD

    Hello. I specialize in CRM, dashboards, databases, and web processing services, accounting, and analytics. Comfortable and modern design. Development is fully turnkey. Contact

  9. 826    10  1   1
    1 day2171 USD

    Hello!
    I am interested in your project. I offer my services for creating modern, scalable, and user-friendly web solutions (online stores, web applications).
    Ready to discuss how to best implement your idea. Write or call!

  10. 10671    591  6   10
    5 days2171 USD

    Ready to take on the work, write to me, I will do everything qualitatively. Work experience is already more than 14 years!

  11. 703    4  0
    5 days2171 USD

    Good morning. I am well familiar with CodeIgniter 4, I can make corrections.
    I also know the Polish language.
    May I see the code and find out exactly where changes need to be made, and ask a few questions regarding your specifications in a private message?
    I am also interested in whether the code is in a Git repository or if you have access via SSH?

    The exact deadline and cost I will be able to provide after reviewing the code and scope of work.
    I am not a middleman.

  12. 212    2  0
    1 day2171 USD

    Good afternoon. Ready to start your project. Write to me
    I have extensive experience in PHP
    _________________________________________

  13. Another 8 proposals concealed
  • Viktor K.
    10 May 2025, 15:56 |

    Вас цікавить виключно CodeIgniter 4?

  • Dmitro Porohnya
    10 May 2025, 16:04 |

    PHP+CI4 

    Cześć

    Czy to jest CodeIgniter 4?

  • Jakub Serok
    10 May 2025, 16:55 |

    Tak, CodeIgniter 4.6

Current freelance projects in the category PHP

Execution of work after SEO audit

334 USD

An experienced OpenCart developer is needed to perform SEO and technical improvements for the online store. Main tasks: Correction of the internal linking structure and menu. Adding links to the footer. Implementation of breadcrumbs with Schema.org microdata. Fixing the…

PHPWebsite Maintenance ∙ 2 days 12 hours back ∙ 59 proposals

Fix issues with Facebook API in the OpenCart module

In OpenCart, there is a module for integrating Facebook and Instagram via API, OAuth, and Webhook. After opening the module page in the browser, the number of API requests to Facebook starts to increase, and the number of errors gr:get:InvalidID also rises. It is necessary to…

PHPWeb Programming ∙ 2 days 13 hours back ∙ 39 proposals

Integration needed: KeyCRM → Cash Register Kashalot

It is necessary to set up integration between KeyCRM and the Cash Register Kahalot. When placing an order in KeyCRM, the data must be automatically transmitted to Kahalot: • order information • products, nomenclature • prices • quantity More details in private.

Content Management SystemsPHP ∙ 5 days 8 hours back ∙ 29 proposals

A WordPress site using the Kadence theme and Kadence Blocks.

223 USD

We need to create a website on WordPress using the Kadence theme and Kadence Blocks. There will be no online store (although it may be added in the future). We need a homepage and several internal pages. The graphics are already prepared, the layout structure is mostly defined,…

Content Management SystemsPHP ∙ 6 days 18 hours back ∙ 38 proposals

Development of 2 SEO-oriented websites for selling spare parts (ATVs and special equipment)

Development of Two Specialized Websites for Selling Spare PartsGeneral Information It is necessary to develop two specialized websites: Spare parts for ATVs, UTVs, SSVs, and other similar equipment. Spare parts for special equipment. Existing company website:…

PHPWeb Programming ∙ 7 days 15 hours back ∙ 77 proposals

Client
Jakub Serok
Poland Wrocław
Project published
1 year back
293 views
Tags
  • CodeIgniter​
  • PHP
  • fakturowanie