Senior Drupal Developer Job at Harvey's Consultancy Services

• Learn and understand the architecture and operation of the existing Drupal-based CMS.
• Take over the technical ownership of a system developed by an external development partner.
• Develop and enhance custom Drupal modules.
• Modify existing functionality, fix bugs, and refactor code.
• Maintain and extend custom core and contributed patches using Composer Patches.
• Identify technical debt and development risks.
• Support Drupal and PHP version upgrades.
• Develop and maintain integrations and APIs.
• Create and maintain unit tests.
• Participate in code reviews and merge request evaluations.
• Use and modify GitLab CI/CD pipelines when required.
• Investigate application issues in containerized and Kubernetes environments.
• Create and maintain up-to-date technical documentation.
• Collaborate closely with operations, QA/testing, and business teams. 

Requirements

• Several years of hands-on Drupal development experience (Drupal 9/10/11).
• Strong proficiency in PHP 8.x and object-oriented programming (OOP) principles.
• Experience developing custom Drupal modules.
• Solid understanding of Drupal's Service, Plugin, and Hook systems, as well as Event Dispatching and Configuration Management.
• Proficiency with Composer and Drush.
• Good knowledge of key Symfony components used by Drupal.
• Experience with relational databases such as PostgreSQL, MySQL, or MariaDB.
• Experience with caching technologies (e.g., Redis), Solr-based search (Search API), and related Drupal configurations.
• Experience with Drupal theme development using Twig, SCSS/Gulp, and frontend JavaScript.
• Ability to independently understand, maintain, and extend large, complex codebases.
• Strong Git skills.
• Experience with code reviews and team-based branching strategies.
• Experience working in Docker-based development or runtime environments.
• Practical knowledge of Kubernetes and troubleshooting containerized applications.
• Familiarity with CI/CD processes and hands-on experience with GitLab CI/CD pipelines.
• Ability to work independently while collaborating effectively with cross-functional teams.
• Willingness to use modern AI-powered development tools (e.g., ChatGPT, Claude, GitHub Copilot, Codex) on a daily basis, or proven experience using them for development, debugging, documentation, and problem-solving. 

Preferred Qualifications

• Experience with the technical handover of systems developed by external vendors.
• Experience developing large-scale, high-traffic, or multisite Drupal applications.
• Knowledge of Varnish or other reverse proxy and HTTP caching technologies.
• Deep understanding of Drupal's caching system and cache invalidation mechanisms.
• Experience with permission and access management solutions (e.g., Group/Subgroup).
• Experience with content migration using Drupal Migrate API.
• Experience with REST APIs, JSON:API, or other system integrations.
• Experience using PHP Unit, PHP Stan, PH Code Sniffer, or other code quality tools.
• Knowledge of Helm Charts and Helmfile.
• Experience with Redis, Solr, Elasticsearch, or similar technologies.
• Experience with monitoring and logging tools such as Open Telemetry and Matomo.