Mini-Postgres: WAL + MVCC
A relational store with a visible write-ahead log. Press CRASH mid-transaction; restart; committed txns survive, uncommitted ones don't.
SIGNAL Database engine internals.
Interactive demos of the systems-engineering problems behind production-grade software. Each one models a real algorithm or production system — naming the system it mirrors and the invariant it proves. Projects show I can build products; this section shows I can solve hard engineering problems for other engineers.
5-node Raft cluster — kill nodes, partition the network, watch leader election + log replication unfold. Same algorithm as etcd, CockroachDB, Consul.
SIGNAL Distributed-state mastery; safety properties under failure.
OpenSelf-referential — instruments this very portfolio's AI endpoints. Live P50/P95/P99 + per-request span anatomy (Gantt-style). Click a trace, see the request's actual journey.
SIGNAL SRE/DevOps mindset. Tracing, sampling, percentile aggregation.
OpenSame request stream fed into four algorithms — Token Bucket, Leaky Bucket, Sliding Window, GCRA. Watch how Spike vs Steady traffic forks their decisions.
SIGNAL Backend infrastructure depth past first-Google-result.
OpenReno, CUBIC, BBR running over identical lossy links. Drag LOSS up to 2% and Reno collapses while BBR holds.
SIGNAL Networking fundamentals — fits an ISP / fiber background.
OpenA relational store with a visible write-ahead log. Press CRASH mid-transaction; restart; committed txns survive, uncommitted ones don't.
SIGNAL Database engine internals.
Watch the false-positive rate trace the theoretical curve as you insert items. Slider for k shows the optimum.
SIGNAL Probabilistic data structures.
Two textareas synced across browser tabs via BroadcastChannel using a real RGA-style CRDT. Diverge offline, converge on reconnect.
SIGNAL Eventual consistency / collaboration architecture.
Add or remove a server — ~1/N of keys move (vs ~all on naive hash). Side-by-side with Rendezvous (HRW) hashing.
SIGNAL Sharding / cache routing — Cassandra, DynamoDB, every CDN.
JS vs WebGL vs WebGPU compute. Reads as graphics-flex more than systems-flex; deferred.
Compile a tiny DSL to bytecode + a stack VM with a mark-sweep GC. Enormous scope; overlaps with the existing polyglot sandbox.