Jonas Beck.
I design and run the parts of the product nobody screenshots — APIs, queues, data pipelines and the on-call rotations that keep them honest. If it has a p99, I care about it.
systemctl list-units
# what I doGET /projects
# click a routeCompany-wide event bus replacing a decade of cron jobs and CSV drops. Schema registry, dead-letter strategy, replay tooling. 40k messages/second at peak, with consumer lag alerts that actually mean something.
Append-only double-entry ledger powering balances for 2M accounts. Strict serializability where it matters, eventual everywhere else. Survived an audit and a Black Friday in the same quarter.
Golden-path deploy platform: one YAML file, canaries, automatic rollback on SLO burn. Took median deploy time from 40 minutes of ritual to 6 minutes of boredom.
CDC out of the OLTP fleet into a lakehouse, with contract tests between producers and the warehouse. Analysts stopped asking "is this number right?" — the dashboards say when they aren't.
git log --oneline career
# experienceStaff Engineer · Relay Systems
- Own architecture for the payments core (ledgerd, atlas-bus)
- Cut infra spend 31% while doubling traffic — mostly by deleting things
- Run the architecture guild; write the RFCs people actually read
- Removed: 14 services that should never have been services
Senior Backend Engineer · Hafen Logistics
- Built tracking ingestion for 60k vehicles (MQTT → Kafka → Postgres)
- Led the monolith strangler project — finished, which is the rare part
- Introduced SLOs; pages went down 70%, sleep went up accordingly
Backend Engineer · Kassenwerk
- POS sync engine for 3k stores with offline-first conflict resolution
- First on-call rotation; learned the difference between alerts and noise
Junior Developer · Agentur Nord
- PHP, MySQL, FTP deploys at 17:55 on a Friday — once
- Deprecated: the habit of deploying at 17:55 on a Friday