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Building a Web Application sound exciting until you face These Unexpected Challenges: Create a web application is more than just writing code. Here are some often over looked issues and terms run into, broken down key areas: 1) UI and UX Design Translating business needs initiatives interface is harder than it seems, Poor user experience is often rooted in a lack of user research of initiative testing. A beautiful design that user can not navigate easily will always fall short. 2) Architecting and Scalability Early architectural design can create bottlenecks letter. Ignoring scalability from the start may force major rewrites when traffic or data grows unexpectedly. 3) Backend Integration Web apps often rely on multiple services and APIs. Handling inconsistent data formats, latency and security between systems can derail timelines. 4) Frontend Performance Large bundles, unoptimized images, or excessive third party scripts often degrade performance. Speed is a failure and users will leave if load time are slow. 5) Security Many apps skips proper authentication flow or data encryption in early stages. These oversight can become costly or reputation damaging. 6) Testing and QA Without robust testing, small bugs become critical failure in production. Manual testing alone does not scale and automation needs to be built in from the beginning. 7) Deployment and CI/CD Setting up reliable deployment pipeline is crucial. Downtime or broken builds during release can erode trust with users and stakeholders. 8) Team Collaboration Misalignments between designers, developers and stakeholders often lead to rework. Clear communication and shared documents go a long way. 9) User feedback loops Releasing without a feedback system limit growth, regular insights from real users help prioritize what truly matters. Creating a web app is as much about problem-solving and collaboration as it is about code. Every challenge is an opportunity to build smarter and better. What challenges have you run into while building web apps and how did you overcome them.