Learn capacity planning fundamentals: how to predict resource needs, avoid over-provisioning, and scale systems efficiently. Essential guide for engineers and operations teams.

Software scalability fundamentals: how systems handle increased load, why scalability matters, and when to scale horizontally vs vertically.

Privacy and compliance fundamentals: protect user data, meet legal requirements, and build systems defensible in an audit.

End-to-end software performance fundamentals: latency, throughput, percentiles, bottlenecks, and measuring user-perceived speed without breaking reliability.

Software quality assurance fundamentals, why QA exists, how it differs from testing, and how teams build quality into how they work.

Retry storm: when retries multiply load and turn partial failures into outages. Learn how they happen, how to detect them, and how to prevent them.

Thundering herd: when many clients do the same work at once and overload a dependency. Understand why it happens, what it looks like, and how to reduce risk.

Backpressure: a system’s way of saying “slow down” before overload turns into timeouts and retries. Understand why it matters and what signals it uses.

Load shedding rejects work during overload so systems stay usable. Learn why it matters, what it looks like, and how it prevents retry storms.

Networking fundamentals for developers: packets, IP addressing, routing, TCP and UDP, DNS, TLS, and a practical troubleshooting mental model.