Top PHP Developer Jobs in St. Louis, MO

The Senior Software Engineer will design and develop scalable applications, enhance DevOps practices, and drive continuous improvement within infrastructure and systems.

Develop and maintain web applications using Angular and NestJS/PHP. Manage MySQL databases and contribute to API design. Engage in client interactions and project planning while ensuring code quality and adhering to best practices.

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.

Build and maintain backend systems for a large-scale community platform: design APIs, improve performance and scalability, ship well-tested features, triage production issues, mentor engineers, and help define AI-assisted development practices and architecture.

Lead backend development and architecture in Laravel/PHP while embedding AI as a core system layer. Build AI agents, prompt pipelines, vector search, and automated workflows integrating third-party services. Optimize APIs, databases, and scalable, secure systems. Mentor engineers and collaborate with product and data teams to deliver reliable AI-powered features.

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 PHP developer role to build and maintain backend services using modern PHP frameworks (Laravel or Symfony). Responsibilities include designing complex SQL queries, developing REST APIs, integrating external services, using Docker and CI/CD, writing tests and code coverage, working with non-relational databases, performing system administration tasks, collaborating with the team, and providing GitHub code samples.

Remote PHP developer role for a fintech company building turnkey solutions. Develop backend features using PHP8 and Laravel 8, integrate external services, write medium-complexity SQL, and create unit/integration tests with PHPUnit. Work on Linux command line and follow OOP/design principles. Collaboration, code quality, and sharing knowledge are expected.

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.

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.

Develop frontend features for mobile/web: quest storefront, user and creator dashboards, admin tools, marketing/sales features, and third-party integrations. Work in one-week Scrum sprints, contribute to architecture, use git/GitLab and AI-assisted coding tools, and collaborate on product development.

The Software Engineer will design, develop, and install software solutions, focusing on web applications using PHP and ensuring coding standards and technical design compliance.