Roman Litvinenko is a backend developer with 12 years of experience in commercial development, specializing in PHP and the server side of web projects. He works with frameworks such as Laravel, Symfony, Yii2, and CodeIgniter, as well as content management systems like 1C-Bitrix, WordPress, and OpenCart. He has experience in designing and optimizing MySQL and MariaDB databases, configuring infrastructure on Linux, Nginx, Docker, and automating processes through GitHub Actions.

Roman frequently engages in integrations with REST APIs, OData 1C, CRM systems, payment gateways, and Telegram bots. His strong suit lies in working with existing projects, analyzing complex architectures, and debugging code even in the absence of documentation. He offers assistance in enhancing functionality, developing APIs, optimizing performance, and providing technical support for projects. While he primarily works remotely, he is available for in-person meetings if necessary.

Reviews

Roman Litvinenko is generally a professional performer who quickly and efficiently completes web development tasks (OpenCart, Bitrix, WordPress), often exceeding expectations: work is done promptly, in accordance with specifications, and accompanied by additional recommendations and consultations. Many clients highlight his competence, politeness, availability, and willingness to collaborate again.

However, there are negative reviews indicating serious issues:
- Several clients (including LLC "ZSK," Vasily Teplov, and Stanislav Kuksenok) report **failure to complete work after prepayment**, **disappearance of the contractor**, **refusal to communicate**, and **fraudulent behavior**.
- One review points out **incomplete fulfillment of specifications**: design elements were missed, errors on mobile devices were not fixed, and the contractor demanded additional payment for unfinished work.
- There are also mentions of **unfriendly attitudes towards clients**, including accusations of "deception" despite having clear specifications.

**Conclusion:** Despite numerous positive reviews, there are **confirmed cases of unscrupulous behavior**, including **disappearance after prepayment** and **incompletion of work**. It is recommended to conduct transactions only through secure methods (for example, using a payment guarantee system).

Portfolio projects

Skills and Technologies: PHP 8.5, Composer, cURL, JavaScript, Laravel 13, Docker, AJAX, jQuery UI, WordPress, OpenCart.

Projects and Achievements: The candidate developed a universal HTTP client in PHP that can be used across various projects, facilitating the sending of HTTP requests via cURL and allowing for client configuration. He also created a shortcode for WordPress that displays the current euro exchange rate from the Central Bank of Russia's website. Additionally, the candidate developed a bank deposit yield calculator using PHP and JavaScript, as well as a notification system on Laravel 13 that supports multiple channels and asynchronous processing. Furthermore, he implemented a custom fields filter for WordPress and a module for OpenCart that enables the display of a product review carousel.

Achievements and Recognition: All projects are actively developed and regularly updated, demonstrating a commitment to continuous improvement of functionality and architecture. The candidate showcases the ability to create useful tools and modules that simplify user tasks and enhance the functionality of web applications.

* It is created by a neural network based on a portfolio, information provided by the user about himself and reviews from other users.

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