> doju labs

— measured, not asserted.

Self-hosted infrastructure, tested with instruments. Time sync, monitoring, edge AI and CI on real hardware — every claim comes with a chart, and the raw data is published so you can argue with it.

New measurements weekly on YouTube. Each video has a full write-up here, with every command and the raw logs.

write-ups

2026-09 · video 01coming soon Chasing 10 milliseconds: time sync done properly on a Raspberry Pi 5
How wrong is a fresh Pi's clock? Measuring with chrony's own logs, finding your genuinely closest NTP servers with hand-built SNTP packets, pinning them at boot — and what WiFi quietly does to a discipline loop.

the rules

Every number on screen comes from an instrument, not a datasheet.
Raw data, configs and tools are published with every video.
Honest verdicts — including when the boring default wins.
Real hardware, real workloads, no lab-conditions theatre.

about

Doju Labs is the engineering lab of DoJu Systems, an independent UK consultancy for DevOps, SRE and SecOps. The lab is where ideas get shipped, broken and measured; the firm is where that engineering goes to work for your business — delivery pipelines, measurable reliability, and security evidence for Cyber Essentials and ISO 27001.

The specialist end of the bench: electronic trading. The lab is run by a Corvil Certified Expert — packet-level latency analytics, market-data quality and MiFID II RTS 25 clock sync for trading systems. When your microseconds are worth money, that discipline is for hire; here, it gets pointed at Raspberry Pis for fun.