Preparing your experience
Topic collection
Plain-language explanations of the systems, tools and decisions behind modern digital products.
15 guides
Deliver appropriate image dimensions and formats for different screens without sacrificing meaningful quality. Measure transfer size and visual quality on representative pages and devices.
Learn how one system notifies another about an event and how to handle retries, signatures and duplicates. Test successful, delayed, duplicate and invalid events before relying on an integration.
Use a realistic testing environment without exposing private data or letting preview pages enter search results. Include forms, jobs, integrations and rollback in release testing, not only visible pages.
Understand how recorded code changes support review, collaboration, releases and recovery. A clean repository and release history make maintenance and handover more dependable.
Plan consistent copies, retention, encryption and tested restoration for valuable application data. Record recovery time and revise the plan after major database or application changes.
Separate proving identity from deciding which actions that identity may perform. Model permissions around business actions and test them with accounts from every role.
Compare browser storage and server session patterns for preferences, authentication and application state. Document every storage item, purpose, owner and expiry as part of privacy and security review.
Understand where responses are stored, how freshness is controlled and why private data needs special care. A written cache policy prevents both stale launches and unnecessary server work.
Recognize successful, redirected, missing and failed requests when diagnosing a website. Include the exact status, URL and time in a useful technical support request.
