Streaming multi-gigabyte uploads through application servers wastes the most expensive capacity in the system on copying bytes, and ties up a request for minutes on a connection that may drop.
Backend and product engineers designing software behavior.
Your approach: Use diagrams, tables or prose for customer contracts, state transitions and data ownership; include APIs only to the depth the question requests.
Pre-Signed Direct Upload. Streaming multi-gigabyte uploads through application servers wastes the most expensive capacity in the system on copying bytes, and ties up a request for minutes on a connection that may drop. Work from the scoping questions below. State assumptions for any unspecified load, guarantee or target, then trace your design end to end. Explain one difficult case and a credible alternative; the worked example is a reference, not a required implementation.
Resolve the scoping questions for Pre-Signed Direct Upload. Separate stated behavior from assumptions, and identify what is outside your design.
Declare relevant volume, latency, freshness, quality or cost targets with units. Show calculations or an evaluation plan that can test them; unspecified targets are your assumptions, not hidden pass criteria.
Explain how your guarantees hold in a difficult case relevant to this subject. Address: What happens if an upload link leaks or is used more than once? How are incomplete uploads and rejected content removed?
Identify users, required behavior and exclusions. Answer: Who is allowed to upload which content and how much? How large are uploads and how unreliable are client connections?
Define the information owned by the system and the inputs, outputs and errors at its boundaries. Resolve: When does an upload become visible to other users? What happens if an upload link leaks or is used more than once?
Estimate the dominant workload and resource demand with units and explicit assumptions. For a learned system, also state how quality is measured and what data is available.
Draw or describe the responsibilities needed for Pre-Signed Direct Upload. Trace a representative request, event or job from its input to a visible result; identify durable state owners.
Walk through a difficult case step by step, including detection and recovery. Consider: How are incomplete uploads and rejected content removed?
Compare a credible alternative using your chosen workload and guarantees. Explain a remaining risk, a signal to watch and when you would change the design.