tempo
PublicDistributed cron with exactly-once delivery, per-tenant rate limits and a Raft-backed schedule log.
Open to staff / principal roles · Kyoto, JP (UTC+9)
Kaito Ishida — Senior Software Engineer
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
interface Engineer { name: string role: string stack: string[] } const kaito: Engineer = { name: "Kaito Ishida", role: "Senior Software Engineer", based: "Kyoto, Japan", stack: ["TypeScript", "Go", "Rust", "Postgres"], focus: ["distributed systems", "developer tooling"], years: 11, } // I build reliable back-ends and the tools that ship them
main
0 problems
TypeScriptUTF-8LFLn 16, Col 58
11Years in production
6Open-source projects
20k+GitHub stars earned
99.98%Median service uptime
Signal
Contribution activity
Public commits, reviews and issues across every repository over the last year. Quiet weeks are real too — sustainable pace beats heroics.
1,300 contributions in the last year
kaito-ishida · updated Jul 4, 2026MonWedFri
Current streak—
Longest streak—
Busiest day—
Less More
Selected work
Things I built and still maintain
A slice of the open-source work — infrastructure I reach for on real systems, shipped with docs, tests and a changelog.
ferrite
PublicEmbeddable LSM key-value store with a crash-safe write-ahead log — 1.2M writes/sec on a laptop.
cascade
PublicVirtualized React data-grid that renders a million rows at a steady 60fps with keyboard-first navigation.
lumen
PublicStructured logging and tracing SDK with zero-allocation hot paths and drop-in OpenTelemetry export.
driftwood
PublicMigration linter that blocks unsafe DDL before it reaches production — catches locks, rewrites and drops in CI.
postplan
PublicInteractive EXPLAIN ANALYZE visualizer for untangling Postgres query plans, node by node, in the browser.
Toolchain
What I reach for
Opinionated but not dogmatic. Boring where it counts, sharp where it pays off.
Languages
day to dayTypeScriptGoRustPythonSQLBash
Backend & APIs
the coregRPCGraphQLNode.jsPostgreSQLRedisKafka
Infra & Cloud
where it runsAWSKubernetesTerraformNomadDocker
Observability
keeping it upOpenTelemetryPrometheusGrafanaSentry
Frontend
when neededReactNext.jsViteWebGLTailwind
Practice
how I workDDDEvent sourcingCI/CDChaos testingDORA
About
Eleven years on the load-bearing parts
I'm a software engineer who has spent most of his career on the unglamorous parts of software — schedulers, storage engines, and the pipelines that stay up while everything around them changes.
I care about correctness under load, honest failure modes, and tooling that makes a team measurably faster. These days I lead a small platform group in Kyoto and write open source in the evenings. I read the papers, I take the pager, and I still enjoy deleting more code than I add.
$ git log --author="kaito" --oneline | wc -l → 21,480
2022 — Present
Principal Engineer · Meridian Systems
Lead the data-platform group. Designed a multi-region event bus moving 12B events/day at four-nines availability.
2018 — 2022
Senior Software Engineer · Kestrel Labs
Rebuilt the billing pipeline end to end; cut reconciliation errors 98% and halved month-end close time.
2015 — 2018
Software Engineer · Aozora Cloud
Owned storage and queueing for a platform serving 4M daily users across the region.
2013 — 2015
Software Engineer · Hoshino Interactive
First role. Shipped the public API that became the company's core product.
2013
B.Eng, Computer Science · Kyoto University
Graduated top of cohort; thesis on consensus under partial failure.
Contact
Let's talk about hard systems
Best for staff and principal roles, fractional platform leadership, or a second opinion on an architecture you're not sure about.
kaito@kyoto:~$ cat contact.txt
Status available — open to staff / principal roles
Timezone JST (UTC+9) · async-friendly, remote-first
Reply within one business day
PGP 4096R / 0xA1F3 9C22 7E10 DD84
kaito@kyoto:~$ ./say-hello