System Design AI

Guided practice

Start with a template. Work through each step. Ask Coach when you need a second opinion.

Classic designs 1

Ordered by design number

Company tags are community-reported. Counts on cards show how many people reported that design.

Multipart uploadClear filters

68. Design Large File Uploads and Downloads
Files up to 50 GB up and down without a byte through the API: presigned URLs, resumable multipart, S3 events, scanning and CloudFront.
ClassicMedium
Object storage AWS CloudFront
+4
Large files Multipart upload Pre-signed URLs Amazon S3
Worked design
Practice

Self-paced by default. Your answers and canvas stay private. AI feedback runs only when you ask for it.