CH 00 · SPECIMEN

Java · Spring Docker Angular Oracle MongoDB PostgreSQL Kafka Kubernetes Rust Node WebAssembly WebGPU TypeScript ClickHouse SQLite Supabase

Now airing — change the channel below.

Rafael
Calderón
Robles

LIVE

Rafael Calderón Robles

systems & performance engineer — rust · wasm · kilobytes

Libraries

Rust → WebAssembly, sized in single-digit kilobytes. Hover a figure — the plates pull apart.

FlashFuzzy

rust · wasm · ~3 kB · npm: flashfuzzy

Typo-tolerant fuzzy search in about three kilobytes of WebAssembly. Bloom-filter pre-filtering feeds a Bitap matcher — sub-millisecond queries across 100,000-record sets, zero dependencies.

docs → source ↗ npm ↗ architecture ↗

Albex

rust · wasm · webgpu · 13.5 kB

A complete document-search runtime in 13.5 kB of WebAssembly — streaming parsers, accent-insensitive matching, a WebGPU compute pre-filter sweeping 100,000 chunks on the GPU. Documents never leave the machine.

docs → source ↗

vectis-crdt

rust · wasm · rga/yata · vector clocks

A CRDT for ordered collections of mutable objects — concurrent edits converge without coordination. Replicated sequence, per-property LWW registers, binary wire format, delta sync. Powers SyncInk’s shared canvas.

docs → source ↗ live in syncink ↗

ClickType

rust · clickhouse

A ClickHouse client for Rust — bulk data ingestion, type-safe query construction, explicit memory control throughout.

source ↗

Experience

One trunk, two roots — work berries on the red side, the person on the cyan side. All copy is placeholder while the style settles. mock

  1. 2023 — now

    Role Title Goes Here

    ■■■■■■■■ · company, redacted mock

    Sample line one — the thing that got built. Sample line two — the number that got smaller.

    stack · goes · here

  2. side project

    Project Name Here

    project.example · what it is mock

    Sample line — the itch it scratches, in one sentence.

    tools · used · here

  3. 2021 — 2023

    Previous Role Here

    ■■■■■■ · company, redacted mock

    Sample line — what changed while you were in the chair.

    stack · goes · here

  4. open source

    Another Project Here

    github.example · repo mock

    Sample line — the thing strangers now depend on.

    tools · used · here

  5. 2019 — 2021

    First Role Here

    ■■■■■ · company, redacted mock

    Sample line — where the whole thing started.

    stack · goes · here

  6. you are here

    This Television

    hand-built html · css · honest noise

    The set you are watching. Channels, teletext, a test card, and one channel not in the listings.

    no frameworks were consulted

Stack

The toolbox, drawer by drawer — the same constellations that orbit CH 00, laid flat and labelled.

daily drivers — the personal band

  • Rust
  • WebAssembly
  • TypeScript
  • WebGPU
  • Node

the enterprise band

  • Java · Spring
  • Angular
  • Kafka
  • Docker
  • Kubernetes

data & storage

  • PostgreSQL
  • Oracle
  • MongoDB
  • Neo4j
  • ArangoDB
  • ClickHouse
  • SQLite
  • Supabase

practices

  • profiling & benchmarks
  • zero-copy & FFI
  • CRDTs & local-first
  • data-oriented design
  • kilobyte budgets

Certificates

Unlocks, not diplomas. Every badge below is placeholder copy while the style settles. mock

6 / 10 unlocked 240 G

  • Achievement Name Here

    One sample line — the deed that unlocked it.

    +30 Gcommon · 92%

  • Second Unlock Here

    Sample line — a slightly harder deed.

    +20 Gcommon · 74%

  • Third Unlock Here

    Sample line — nobody reads the manual first.

    +40 Guncommon · 31%

  • Rare Unlock Here

    Sample line — the one that takes a whole evening.

    +60 Grare · 6.2%

  • Fifth Unlock Here

    Sample line — a kindness, recorded forever.

    +15 Guncommon · 22%

  • Sixth Unlock Here

    Sample line — found by accident, kept on purpose.

    +50 Grare · 3.8%

  • ???

    Locked — keep watching.

    +?? Ghidden

  • ???

    Locked — keep watching.

    +?? Ghidden

  • ???

    Locked — some channels are not in the listings.

    +?? Gultra rare

  • ???

    Locked — keep watching.

    +?? Ghidden

Archive

Every article, taped off air and shelved — fifteen recordings and one blank cassette waiting for the first book.

16 Patterns for Crossing the WebAssembly Boundary wasm · ffiSP 0:16 How I Built a CRDT Engine for a Collaborative Whiteboard rust · crdtSP 0:14 Real Zero-Copy: A Technical Autopsy of Cap'n Proto serialization · rpcSP 0:12 Your Code Is Slow Because You Think in Objects, Not Data dod · cacheSP 0:11 Beyond FFI: Zero-Copy IPC with Lock-Free Ring-Buffers rust · ipcSP 0:13 How Cloudflare Replaced NGINX with Rust, Tokio and Pingora rust · networkingSP 0:10 From WAL to WASM: Local-First Sync with Postgres & SQLite postgres · sqliteSP 0:15 Rust as a Universal Accelerator rust · ffiSP 0:09 Observability for AI Systems with OpenTelemetry ai · otelSP 0:12 WASM Microservices: From Binaries to Composable Components wasm · architectureSP 0:13 The Hidden Cost of JSON in REST APIs json · cpuSP 0:08 The Ideological Battle for Memory Management gc vs ownershipSP 0:11 FlashFuzzy: Fuzzy Search Engine Architecture rust · searchSP 0:10 LavinHash: Engineering Similarity — A Dissection rust · hashingSP 0:12 The Idle Consciousness: Hegel in the Age of AI philosophy · aiSP 0:14 first book — still blank tape vol. 0 · somedaySP —:—
the originals air on dev.to/rafacalderon ↗

Portrait

CH 06 · silver on paper

Letters, commissions and bug reports are welcome. The fastest route is email; the public one is GitHub.

rafaelcalderonrobles@gmail.com linkedin.com/in/rafael-c github.com/RafaCalRob

Set in Bricolage Grotesque, Fraunces & JetBrains Mono · hand-built, no trackers · © 2026 Rafael Calderón Robles · bdovenbird.com