Technical scope & engineering decisions
Web & delivery
React and TypeScript interfaces backed by application APIs, with Docker and CI/CD for repeatable releases. Attention extends from loading and error states to data compatibility, recovery, and checks of complete user interactions.
React · TypeScript · Docker · CI/CD
Technical scope
Interfaces under real request conditions
Retained user context is part of recovery, alongside the error message.
Handle loading, empty results, expired permissions, old data, and failed requests. Validate API responses at runtime as well as describing them with TypeScript. Keep filters and user input intact during refreshes, and prevent a slow response from overwriting newer results. Support these interactions with keyboard access and clear feedback on small screens.
Release boundaries and persistent state
A replaceable application container does not make stored state disposable.
Build deployable artifacts through CI/CD, keeping configuration and persistent data separate from the container image. Check API and data compatibility while old and new versions run together. Use health probes to control traffic during startup, and prepare recovery steps for both application changes and data migrations.
Evidence after deployment
Build success, process readiness, and a completed interaction are different claims.
Check layout, keyboard use, and failure recovery in the browser; test API responses and recovery paths separately. Keep timestamps on monitoring readings so old data remains recognizable. Measure slow requests and rendering work under representative conditions, including animation and user input.
Design priorities
When to use each option, what it costs, and what to test.
Refresh without discarding intent
- Selection
- Background updates overlap with filters, navigation, or unsaved user input.
- Trade-off
- Keeping user input means handling out-of-order responses, old data, and changed permissions.
- Verification
- Exercise slow and out-of-order responses, failure recovery, and keyboard focus after updates.
Gate traffic with readiness
- Selection
- A process can start before it is ready to handle its intended requests.
- Trade-off
- Readiness protects traffic routing but cannot establish workflow correctness, backups, or failover.
- Verification
- Verify startup, unavailable dependencies, persistent-volume handling, and compatibility across a release.
Measure the actual experience
- Selection
- A page is slow to display or respond during a normal visit.
- Trade-off
- Lab tests are repeatable, but real devices and networks vary. Field data is needed for real-user percentiles.
- Verification
- Include default animation, representative interactions, reduced motion, and variation across repeated runs.
Public implementation notes cover read-only reporting, application and storage boundaries, and diagnostic failure handling. These personal lab projects show implementation details, not client work or production-scale results.