2025 — Present
AI Factory
Frontend Engineer
For public-sector web services, I improved operational information accuracy, visibility into long-running tasks, responsiveness on data-heavy screens, and release reliability.
Improving dashboard accuracy and transfer efficiency
I corrected missing values, incorrect usage ratios, and omitted time series so operators could rely on the PC status shown in the dashboard. I aligned metric names and labels with actual responses, corrected usage-ratio calculations, and separated time series that shared the same label.
I changed queries to fetch only values after the previous request time, reducing data transferred over 10 minutes from 96.5 MB to 41 KB. I compared the deployed dashboard with actual responses to verify the displayed values.
Verified in productionNext.js, Prometheus, Recharts
Improving wait experience and status accuracy for 5–10 minute document generation
Users can see the current stage and elapsed time during 5–10 minute document generation and decide whether to leave or cancel with the relevant status in view. If they continue, status tracking remains active so they can keep following progress.
The client confirms server status after SSE events, so the UI reflects actual processing even when events arrive during a request or the connection fails. Status checks stayed at 10 or fewer per task, compared with an estimated 100–200 checks at three-second intervals. After deployment, I verified that the server-side generation and cancellation states matched the displayed progress.
For 5–10 minute tasksReact, SSE, Next.js
Eliminating 3–4 second UI freezes and keeping real-time charts continuous
I restored interaction on run-history and detail screens that froze for 3–4 seconds while processing API responses of about 5 MB. I applied a shared approach that moved API requests and transformation into a SharedWorker, then verified after deployment that the freezes were resolved.
I merged historical values loaded after refresh with new streamed values on the same time basis, keeping the chart continuous without duplicates. I recombined split JSON fragments with the next chunk so real-time updates could continue.
Response size and format retainedSharedWorker, REST, Streaming
Validating 70+ key flows with consistent authentication recovery
I made more than 70 key authenticated-user flows repeatably testable before release. This coverage surfaced a mismatch between credentials retained in the browser and an expired server session.
I applied one recovery behavior both before entering protected screens and when authentication failed during use, giving users a consistent response. I handled root-cause analysis and deployment of the shared recovery behavior to the QA environment.
Pre-deployment verificationPlaywright, Authentication, QA