I'm

Jonas Keller

Backend engineer in Berlin. Mostly Go and Postgres, mostly making things smaller. Everything I have shipped, written or spoken about is here — this page is the CV.

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Backend engineer

Projects & contributions

6
litestreamPinnedStreaming replication for SQLite. Still the cleverest thing I have read this year.riverPostgres-backed job queue for Go. No Redis, no second story to tell.sqlcGenerates type-safe Go from SQL, rather than SQL from Go.gooseMigrations that are just files, in order, with no framework attached.pgrollZero-downtime schema changes, with a rollback that actually rolls back.

Stack

6
GoBoring on purpose. That is the feature.PostgreSQLThe answer to more questions than people expect.NATSFor the messages that genuinely cannot be a table.CaddyTLS that I have never once had to think about.DockerDev environments that survive a laptop swap.GrafanaThe dashboards on-call actually opens.

On every machine

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ripgrepThe grep every other tool now shells out to.fzfFuzzy finder that ends up wired into everything.deltaGit diffs you can read without squinting.lazygitStaging and rebasing without the incantations.justmake without the historical baggage.miseOne version manager for every runtime in a project.tmuxSessions that survive a dropped SSH connection.HTTPiecurl for humans, with readable output by default.zoxidecd that learns the directories you actually use.

Talks & writing

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Why we moved off KafkaPinnedWe had 400 messages a second and a lot of YAML.Postgres is enoughQueue, cache, search, cron. One thing to operate.Talk: Deleting code for a livingFOSDEM 2026, 22 minutes.Talk: Postgres as a queue, two years inGopherCon EU. SKIP LOCKED and the four things that bit us.Choose boring technologyNot mine, but I hand it out often enough that it lives here.

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