Guido X Jansen

@gui.do

2586 Followers 3881 Following

Bullish on atproto & the open web 🏗️ sifa.id | barazo.forum | singi.dev 🪿 * 20+ years community building (Joomla!, Magento, Spryker, CRO.CAFE) * Cognitive Psychologist turned DevRel * Open source & automation * Former competitive swimmer 🏊‍♂️ 🇪🇺 🇳🇱 👨‍👩‍👦‍👦 🏡 gui.do

Jerry followed me back
Not doing admin, house chores or finding a job. Working on Sifa instead...
Label-popup showing that the users account "has been placed n a city's local feed", but it doesn't show the location
Instant Messaging options on LinkedIn: Google Hangouts (which no longer exists), QQ, Skype (also dead) and WeChat.
July 1, 2013, celebration 150 years of liberation from slavery in Suriname
temperature graph of today with over 4 hours of 40+ temperatures
4 × 3 26 June 2026 166 points • No mistakes 🌟🟪🟪 🌟🟨🟨 🌟🟩🟩 🌟🟦🟦 https://hankgreen.com/fourbythree
Pckt going from whimsy to serious
Apps as views, not vaults
Cabinet view of your ATproto data, with different content types in the different cabinet areas, and the apps on the outside providing a view on specific content types.
4 × 3 11 June 2026 165 points • No mistakes 🌟🟪🟪 🌟🟩🟩 🌟🟦🟦 🌟🟨🟨 hankgreen.com/fourbythree
4 × 3 24 June 2026 136 points • No mistakes 🌟🟦🟦 🟨🟨🌟 🟩🌟🟩 🟪🌟🟪 hankgreen.com/fourbythree
4 × 3 22 June 2026 146 points • No mistakes 🟪🌟🟪 🟨🌟🟨 🟦🟦🌟 🟩🌟🟩 hankgreen.com/fourbythree
List of currently reading and recently read books
Couple laying in bed meme Her: He's probably thinking about other women Me: Is a like really a like if the AppView never indexed it?
Personal CV page, driven by Sifa ID profile data
first post on the first version of my personal website in 2001. Frank (who posted this) was a friend at school (I knew nothing about websites back then 😅)
Guido nodding
Crackers with cottage cheese, cucumber, and waaaaay too much crispy chilli. Or too little....? 😏
Article interaction count
Juttu comment section
a "righ now" box on the homepage of gui.do showing my recent activity
quote by Matt Mullenweg, CEO @ Automattic: "Bluesky proves that it is computationally possible to solve the problem of twitter-like social networking in a distributed fashion, with a clear user experience. That is really exciting to me"
Showing a random set of avatar variations
Cartoon Brain: hey are you sleeping Me: yes, shut up Brain: I have a new interop idea Me: fully awake again
Brittany's profile with many apps!
Table titled "Same event, both firehoses, which reaches us first? (measured from our EU server)." It compares two AT Protocol firehoses, Eurosky and Bluesky, across two event types: likes and posts. Events matched on both streams: 8,603 likes and 1,579 posts. Eurosky arrived first for 68.9% of likes and 63.7% of posts. Bluesky arrived first for 31.1% of likes and 36.3% of posts. Median time Eurosky was sooner: 43ms for likes, 42ms for posts. Footnote: measured on the global firehose, which skews US; Sifa's users are 46% on EU PDSes, so the real-world lead is larger.
Bar/table comparison of three AT Protocol Jetstream servers tested from a Hetzner Germany VPS. Eurosky (jetstream1.eurosky.network) and microcosm (jetstream2.fr.hose.cam) are both in Germany; Bluesky US (jetstream1.us-east.bsky.network) is in the US. Throughput is identical across all three at about 150 events per second. Real-time lag (how far behind live): Eurosky 2ms, microcosm 1ms, Bluesky US 47ms. WebSocket connect time: Eurosky 37ms, microcosm 25ms, Bluesky US 294ms. All three carry id.sifa records with matching counts. Takeaway: the two EU jetstreams are near-instant; the transatlantic US one is ~45ms laggier and ~10x slower to connect.
Missing Edit feature from the dropdown
Screenshot of Linkedin Post impression showing 277 impressions
bsky blocking feature
Overview of all 16 aproto relay nodes
Latency comparison table titled "AT Protocol infra latency, measured from Sifa production in Hetzner Germany," dated 10 June 2026, 8 samples per service. Columns: Service, Path, average ping round-trip time, median HTTPS request time, and TLS portion of that request. Rows: Eurosky relay (firehose) 3.7 ms ping, 66 ms HTTPS, 62 ms TLS. Bluesky relay bsky.network (firehose) 156.6 ms ping, 488 ms HTTPS, 328 ms TLS. Bluesky Jetstream us-east (firehose JSON) 92.8 ms ping, 292 ms HTTPS, 198 ms TLS. Eurosky PLC mirror (identity) 3.0 ms ping, 57 ms HTTPS, 52 ms TLS. Bluesky PLC directory (identity) ping blocked by ICMP filtering, 355 ms HTTPS, 239 ms TLS. Microcosm Slingshot (identity resolver) 91.1 ms ping, 385 ms HTTPS, 199 ms TLS. Lower is better in all columns; all values in milliseconds. The European-hosted Eurosky relay and PLC mirror respond in roughly 3 ms ping and 60 ms HTTPS because they sit in the same German datacenter region as the server, while Bluesky's US infrastructure is 25 to 50 times the network round-trip and 5 to 8 times the HTTPS time.
From the Anthropic press release: "included on Pro, Max, Team, and seat-based Enterprise plans at no extra cost."
screenshot of the Edit Career modal on Sifa.id
People not Platforms sticker
View across the IJ river near Amsterdam Central station
Slide "this talk contains dangerous ideas"
page 4 of the european.social folder
Photo of the stage
Panel session
https://european.social/ individual signee list, Guido is the first signee and shows up first in the list
Sinds profile from Roscoe, showing 13 different atproto apps
Computers were a mistake