On the programming side, adopting a microservices architecture allows for modular development and scaling of specific functionalities independently with programming. Pay attention to database scalability by choosing distributed databases and implementing caching mechanisms to optimize data retrieval.

Remember, scalability is an ongoing process, so monitoring and adjusting your infrastructure based on usage patterns is key. Engaging with the sysadmin and programming communities for insights and best practices can also be beneficial. Good luck with your web application project!