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[ System Design ]

Architecture breakdowns of large-scale distributed systems. Written as I study — raw, honest, and in my own words.

4 notes·growing over time
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Designing an Image Upload Service (like Instagram)
A deep dive into presigned URLs, separation of concerns, privacy, and image optimization — how large-scale systems handle image uploads without ever touching the image bytes themselves.
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Designing a Distributed Load Balancer: CoreDNS, Prometheus, and the Art of Failure
A deep dive into building a reactive, scalable load balancing architecture using private DNS, CDC, and telemetry-driven orchestration.
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WhatsApp System Design
How WhatsApp handles 100B+ messages/day with end-to-end encryption, minimal servers, and global delivery.
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Discord System Design
How Discord serves 19 million concurrent users with real-time voice, video, and text — and why they moved from Golang to Rust.
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topics

system-designbackenddistributed-systemsDistributed SystemsLoad BalancerCoreDNSPrometheusSystem Designmessagingwebsocketsencryptioncassandraelixirrustreal-time