In what order should I build the modules?
Sequence by dependencies. Auth first (you need users), profile next, then feed, swipe, match, chat, payments. Each module builds on the previous ones.
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More FAQs in Project Planning Roadmap: From Idea to Code
Write the goal, list features, group into modules, prioritize, pick the stack, decide architecture, sketch the schema, write HLD and LLD, sequence by dependencies, estimate, set up the repo, build a health check, then build module by module.
It anchors every other decision. If you cannot say what the app does in one sentence, you do not understand it. Vague goals lead to scope creep and unfocused builds.
Set up the repo and build a health check (GET /health). The health check confirms the server runs and the port is open. It is the first shippable thing.
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