Update Opencart to the latest version

**Job Description:**

We are seeking a skilled OpenCart Developer with expertise in upgrading e-commerce platforms, specifically from OpenCart version 3.0.2.0 to the latest version, OpenCart 4.0. The ideal candidate will also have experience working with the Pavillion theme and possess a deep understanding of custom modules, particularly the search module integrated into the frontend.

**Responsibilities:**

1. **Upgrade OpenCart Version:**
- Plan and execute the seamless upgrade of OpenCart from version 3.0.2.0 to the latest version 4.0.
- Ensure all existing functionalities, data, and customizations are preserved during the upgrade process.

2. **Theme Migration:**
- Assess the compatibility of the current Pavillion theme with OpenCart 4.0.
- Modify or update theme components to align with the new version's requirements.
- Preserve the existing design elements and user experience while implementing necessary updates.

3. **Custom Search Module:**
- Analyze the current custom search module integrated into the frontend.
- Ensure the compatibility of the search module with OpenCart 4.0.
- Make necessary adjustments to the custom search module code to maintain functionality.

4. **Testing:**
- Conduct thorough testing of the upgraded OpenCart version to identify and resolve any issues.
- Test the Pavillion theme and custom search module for compatibility and functionality.
- Collaborate with the quality assurance team to ensure a bug-free and reliable upgrade.

5. **Documentation:**
- Document the entire upgrade process, including steps taken, changes made, and any potential issues encountered.
- Provide clear and comprehensive documentation for future reference and troubleshooting.

**Qualifications:**

1. Proven experience as an OpenCart Developer with a focus on version upgrades.
2. Strong proficiency in PHP, MySQL, and web development technologies.
3. Experience working with the Pavillion theme for OpenCart.
4. In-depth knowledge of e-commerce platforms and best practices.
5. Previous experience with custom module development and modification.
6. Detail-oriented with excellent problem-solving skills.
7. Effective communication skills to collaborate with cross-functional teams.