A complete project-management front end: full CRUD for plans, requirements and defects, reusable templates, a Gantt view and a dashboard of derived metrics, in about 1,900 lines of vanilla JavaScript with no build step, verified by an 80-plus-check Playwright suite. You can operate it live on this site.

Authenticated dashboards, maps, charts, filters, and CSV export over a PostgreSQL schema that joins LA crime data with California retail sales records. Graded 99/100.

End-to-end distributed search platform with a custom crawler, indexer, PageRank, replicated key-value store, multithreaded web server, and an RDD-style compute layer named Flame.

C implementation of Unix-like OS features: a shell with job control and I/O redirection, a SIGALRM-driven priority scheduler over spthread, full process lifecycle with signals and zombies, and the PennFAT on-disk filesystem — all wired up to a sandboxed live terminal on this site.

Full-stack onboarding tool with structured questionnaires, input validation, standardized submissions, and backend APIs for client intake.

Fixed Apple Watch sync issues, refactored REST APIs, optimized AWS RDS queries, and wrote developer documentation that reduced onboarding time for new contributors.