Top Senior PHP Developer Jobs in Washington, DC

The PHP Developer will design and architect web applications using the LAMP stack, collaborate with teams, optimize performance, ensure security, mentor junior developers, and conduct code reviews.

The Senior Backend Engineer will maintain a PHP-based payment platform, migrate to Rust, troubleshoot production systems, and contribute to code quality and deployment cycles.

Lead architecture, development, and maintenance of scalable Moodle LMS platforms. Build custom plugins and themes, implement SCORM/xAPI/LTI integrations, optimize performance and security, manage CI/CD and cloud deployments, and mentor engineers while collaborating with designers and stakeholders.

Remote senior PHP developer role building fintech solutions. Work in a team using PHP 8 and Laravel 8 (or Symfony), integrate external services, design and optimize SQL databases, write unit/integration tests with PHPUnit, and use Linux/CLI. Emphasis on PSR, OOP, SOLID and common design patterns; Docker, GitLab CI, and composer experience are a plus.

Design, build, and maintain FeeNavigator features across backend and frontend. Optimize MySQL queries, write unit/integration/end-to-end tests, refactor complex code, document architecture, participate in code reviews, collaborate with Product and SRE, diagnose incidents and performance issues, and contribute to development process improvements.