• Production-grade HTTP/1.1 server framework written from scratch on raw TCP sockets with zero runtime dependencies; a byte-level incremental parser reassembles requests across packets and stays strict against request smuggling — rejecting conflicting Transfer-Encoding / Content-Length, obsolete line folding, and oversized headers.
• Radix-trie router with path params and wildcards over an onion-model async middleware engine; keep-alive, pipelining, chunked transfer, range requests, ETags / 304s, gzip / brotli / deflate, WebSockets (RFC 6455) and SSE; JWT with algorithm pinning and constant-time verify, CORS, sliding-window rate limiting, Prometheus metrics, graceful shutdown — ~10k req/s at p99 ≈ 8 ms.

TypeScript · raw TCP sockets · HTTP/1.1 · WebSockets · TLS · zero deps

• One-time secret-sharing service over HTTPS: secrets are encrypted client-side with AES-256-GCM under an HKDF-derived key that lives only in the URL fragment, so the key never reaches the server — it stores ciphertext it cannot read.
• One-time retrieval via atomic Redis GETDEL (no read-then-delete race), TTL-based auto-expiry, and authenticated encryption that hard-fails on any tampering. Zero server-side key storage.

TypeScript · AES-256-GCM · HKDF · Redis · zero server-side key storage

• Three-node distributed key-value store implementing the Raft consensus algorithm in pure C over raw POSIX sockets with zero dependencies — leader election, log replication, and crash recovery; an acknowledged write survives any single-node failure, including a hard SIGKILL, and a rejoining node replays its log to catch up.
• Four-thread node over a single mutex-protected state machine; log appended with O_DSYNC for WAL-grade durability; hand-rolled binary wire protocol framed through recv_all. Validated by a chaos suite — random kills, iptables partitions, failover — clean under TSan / ASan / UBSan.

C · Raft consensus · POSIX sockets · O_DSYNC durability · pthreads

• Maintained the relational cargo-logging database for Oil Jetty No. 8 (liquid-bulk tanker discharge) — wrote SQL and PL/SQL to record and reconcile consignment and vessel data, enforcing validation and integrity across high-volume daily entries.
• Built a structured logging and audit trail of cargo events through discharge and produced tracking reports, giving operations real-time visibility into throughput and surfacing discrepancies early.