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wren@hollowpine — /home/wren/portfolio — zsh — 96×44 tty004 load 0.31
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Wren Kasabian · Systems & Interface Engineer · Lisbon, UTC+1

I build the unglamorous layer — schedulers, sync engines, and the dense operator consoles that sit on top of them. Fourteen years of making machines legible to the people who run them.

Type help at the prompt below, or just keep reading. Everything on this page is output from a command that already ran.

wren@hollowpine:~/portfolio$

— profile —

Currently principal engineer at Hollowpine Systems, where I own the replication core behind a fleet-management product used by 41,000 field technicians. Before that: six years on payments infrastructure, two on an open-source terminal multiplexer nobody asked for and 30,000 people now use daily.

My work tends to look like a table. I am fine with that. The best interface for a person who already knows their domain is a dense, honest one — no carousels, no progressive disclosure of things they need every single day.

Shipped years
14since 2011
Uptime owned
99.98%rolling 12mo
P99 latency
42mssync fanout
OSS installs
1.2Mall packages
wren@hollowpine:~/portfolio$

total 6 · 218M

modeprojectsummarystackscale
drwxr-xr-xdriftwood/Conflict-free replication engine for offline-first field apps. Survives three-week disconnects.rust · crdt41k users
drwxr-xr-xsablecrest/Operator console for a 900-node ingest fleet. One screen, forty signals, zero modals.ts · svelte900 nodes
drwxr-xr-xferrule/Terminal multiplexer with session teleport. My longest-running open-source habit.go · ncurses30k dau
drwxr--r--tinbox/Deterministic job scheduler; replays any incident from the write-ahead log.rust · wal6M jobs/d
-rw-r--r--gravel.mdField notes on designing for people who read logs for a living. 62 essays.writing62 posts
drwx------quietfern/Unreleased. A profiler that explains itself in plain sentences. Ask me about it.privatewip
wren@hollowpine:~/portfolio$

weighted by commits, not by confidence

  • rust94
  • typescript88
  • postgres79
  • go71
  • css/layout66
  • terraform48
  • patience31
wren@hollowpine:~/portfolio$

branch: main · 6 commits shown

  • a91f4c2Principal Engineer, Hollowpine Systems 2022 — present · replication core, operator tooling, hiring
  • 7c0e88dStaff Engineer, Marrowbank Payments 2018 — 2022 · ledger reconciliation, 6M txn/day
  • 3de1a07Released ferrule 1.0 to the public 2017 · 4 years of nights, one weekend of documentation
  • b52aa9eSenior Engineer, Northgale Labs 2014 — 2018 · scheduling, first taste of ops UI
  • 0f7d31bBackend Engineer, Studio Pallas 2011 — 2014 · CMS work, learned to hate modals
  • initialFirst commit: a BASIC program that printed my name forever 1998 · still the best feedback loop I have had
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4 lines, 312 bytes

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open to: consulting · fractional staff work · one good full-time thing