What does a full stack PHP developer do?
A full stack PHP developer builds web applications by writing server-side logic in PHP and connecting it to databases for data storage and retrieval. This role bridges the gap between user-facing interfaces and backend systems, ensuring that HTTP requests trigger the correct business rules and data updates. The developer structures code to follow industry standards like PSR-4, which maps namespaces to file paths for automatic loading of classes. They also secure data interactions by using prepared statements to prevent SQL injection attacks during database queries.
- Implement server-side endpoints and business logic in PHP to handle HTTP requests from web browsers or mobile apps. This work involves defining routes that map specific URLs to controller actions, ensuring the application responds correctly to user inputs. The developer writes clean, maintainable code that separates concerns, making it easier for other engineers to understand and modify the system later. By following PSR-4 autoloading standards, they organize classes into logical directories so the application can find and load them without manual include statements.
- Design and manage database interactions using PDO prepared statements or an ORM like Doctrine to store and retrieve application data safely. The developer creates migration scripts to update the database schema as features evolve, ensuring that table structures match the needs of the code. They use parameterized queries with bound parameters to eliminate the risk of SQL injection, a common security vulnerability in web applications. This approach keeps data consistent and protected while allowing the application to scale as the volume of stored information grows.
- Build backend features that support web UI or API behavior by connecting controllers to data access layers and business rules. The developer tests these integrations to confirm that data flows correctly from the user interface through the PHP logic and into the database. They refactor existing code to improve performance and readability, removing redundant logic and optimizing slow database queries. This ongoing maintenance ensures the application remains stable and responsive as new requirements emerge from clients or end users.
How to hire a full stack PHP developer on Upwork
Step 1: Post a job
Define your backend and frontend requirements clearly to attract qualified candidates. Use the Job Post Generator powered by Umaโข, Upwork's Mindful AI to draft a precise description. Describe your needs in a few sentences, and Uma creates a tailored post for this role. You can write a new post, update a saved draft, or reuse an existing one.
- Specify that the developer must implement server-side endpoints using PHP and map HTTP routes to controller actions.
- Require experience with PSR-4 autoloading standards to organize classes and maintain a clean codebase structure.
- List database tasks such as creating migration scripts and writing parameterized queries to prevent SQL injection.
Step 2: Evaluate candidates
Look for portfolios that demonstrate full lifecycle development from database design to user interface integration. Uma can run instant video interviews and build shortlists with side-by-side comparisons to help you assess technical fit.
- Check for examples of backend features where the candidate built controllers and business logic for web applications.
- Verify their ability to model application data using an ORM like Doctrine or direct PDO prepared statements.
- Review code samples for proper namespace-to-filepath mapping and adherence to PHP coding standards.
Step 3: Interview your top choices
Discuss specific technical approaches to confirm their expertise in PHP ecosystems. Schedule and conduct interviews within Upwork Messages, which generates an immediate transcript and summary after each session.
- Ask how they structure database access layers and handle schema changes through migration commands.
- Request examples of how they secure queries against injection attacks using bound parameters.
- Explore their process for integrating backend APIs with frontend components to ensure seamless data flow.
Step 4: Agree on scope and begin work
Set clear milestones for deliverables such as completed modules or database updates. Use Upwork Messages and the contract workroom for communication and project management, while identity verification, payment protection, hourly tracking, and project funds secure the engagement.
- Define milestones for shipping specific backend features or refactoring legacy code sections.
- Agree on the delivery of migration scripts and tested API endpoints before releasing project funds.
- Establish a routine for code reviews to verify PSR-4 compliance and logical consistency in new commits.
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