"Guido is a thought leader in community building and developer relations. Any company serious about building an ecosystem should talk to him."
I build community functions for tech products.
For 21+ years I've helped tech teams turn developer & customer intelligence into product strategy, grounded in cognitive psychology and a habit of testing my assumptions. I help build communities, and the teams that run them.
- Bluesky Post 6d ago
If you want to keep your community inclusive, you need to keep the uninclusive out
Open this Bluesky post in a new tab - Bluesky Post 4d ago
My Mac Mini (M2 Pro, 16 GB) kept choking when running many parallel LLM sessions + local test suites. Needed way more memory ➡️ swap overflowed ➡️ trashed the CPU ➡️ many forced tea breaks for me 😅 Meanwhile my game PC has 48 GB RAM + RTX 5070 and was doing.... nothing. 👀 Time to make same changes 🧵👇
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- Bluesky Post 5d ago
Idea for @atmosphereconf.org: everyone is required to bring someone they like but it's someone that doesn't have an atproto account yet...
Open this Bluesky post in a new tab - Bluesky Post 3d ago
I don't really get the use of LLM /loops mostly. Seems like a huge waste of tokens to use it for everything under the sun? Why not use hooks/triggers when something happens? Write a script to check something and only when it does, then you can wake you agent and have it do something?
Open this Bluesky post in a new tab - Bluesky Post 1d ago
Moin
Open this Bluesky post in a new tab - Bluesky Post 12h ago
@benmarks.bsky.social good luck today... #php
Open this Bluesky post in a new tab - Bluesky Post 4d ago
@loth.eurosky.social Theo!
Open this Bluesky post in a new tab - GitHub Pushed code 17h agoGitHub
- Open this Popfeed review in a new tabPopfeed 27d agoSiloTv show · Apple TV10/10
- Smoke Signal Going 28d agoAtmosphereConf 2027Apr 29, 2027Open this Smoke Signal event in a new tab
- Tangled Pushed code 28d agoReads lag behind the web UI right after a writeOpen this Tangled code in a new tab
- Tangled Pushed code 28d agoLook up issues/PRs by their #number, not just record-keyOpen this Tangled code in a new tab
- Tangled Pushed code 29d agotest(ci): probe pull_request trigger (do not merge)Open this Tangled code in a new tab
- Smoke Signal Going 1mo agoOff Protocol LIVE — with Atmosphere Conf '27 organizersSep 23, 2026Open this Smoke Signal event in a new tab
- Tangled Pushed code 1mo ago2048.socialSimple atproto game, 2048 tiles with the avatars of your friendsOpen this Tangled code in a new tab
- Open this Bookhive review in a new tabBookhive 2mo agoWhy None Of My Books Are Available On Audible: And why Amazon owes me $3,218.55
- Open this Popfeed review in a new tabPopfeed 2mo agoFuturamaTv show · FOX8/10
- Open this Popfeed review in a new tabPopfeed 3mo agoGodzillaFilm · Roland Emmerich8/10
- Open this Popfeed review in a new tabPopfeed 3mo agoSugarTv show · Apple TV9/10
- Open this Popfeed review in a new tabPopfeed 3mo agoFinal SpaceTv show · Adult Swim10/10
- Open this Popfeed review in a new tabPopfeed 3mo agoPantheonTv show · Netflix10/10
- Open this Popfeed review in a new tabPopfeed 3mo agoSexistentialAlbum · Robyn8/10
- Open this Popfeed review in a new tabPopfeed 3mo agoDe vloek van PolyfemosBook · Evert Hartman9/10
- Tangled Pushed code 3mo agoFix sifa id logomark: replace Singi Labs mark with Sifa'sOpen this Tangled code in a new tab
- Open this Popfeed review in a new tabPopfeed 4mo agoLEAN STARTUP metodikaBook · Eric Ries7/10
- Open this Popfeed review in a new tabPopfeed 4mo agoThe Man from EarthFilm · Richard Schenkman10/10
- Open this Popfeed review in a new tabPopfeed 4mo agoThe Last of UsTv show · HBO9/10
- Tangled Pushed code 4mo agobsky-avatarDynamic avatar rotationOpen this Tangled code in a new tab
- Smoke Signal Going 5mo agoatproto.local federation formation working sessionMay 21, 2026Open this Smoke Signal event in a new tab
- Tangled Pushed code 6mo agoatproto-plc-counterAT Protocol PLC directory counterOpen this Tangled code in a new tab
- Tangled Pushed code 7mo agosifa-lexiconsAT Protocol lexicon schemas for Sifa professional profiles (id.sifa.*)Open this Tangled code in a new tab
- Tangled Pushed code 8mo agobarazo-workspacepnpm workspace root for Barazo forum development — shared configuration, tooling, and cross-package dependency managementOpen this Tangled code in a new tab
- Tangled Pushed code 8mo agobarazo-deployBarazo Docker Compose templates for self-hostingOpen this Tangled code in a new tab
- Tangled Pushed code 8mo agobarazo-lexiconsBarazo lexicon schemas and TypeScript typesOpen this Tangled code in a new tab
- Smoke Signal Going 8mo agoATmosphereConf 2026Mar 26, 2026Open this Smoke Signal event in a new tab
- Grain Photo Oct 2026Guus in his hut
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- Grain Photo Sep 2026For those who though I was joking about wearing clogs at @atmosphereconf.org: here's pict…
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- Grain Photo Sep 2026Amsterdam by night
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- Grain Photo Sep 2026It's @thealexlichter.com starting his Vite+ talk at the @vitest.dev x @npmx.dev meetups i…
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- Grain Photo Sep 2026lunchtime!
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- Grain Gallery · 2 photos Sep 2026Helsinki 🇫🇮
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- Grain Gallery · 10 photos Sep 2026Helsinki 🇫🇮
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- Grain Gallery · 5 photos Sep 2026Helsinki 🇫🇮
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Brands I've worked with
From retail to telecom to financial services, I've helped teams across industries build stronger communities.
Writing
Talks & speaking
that's me Why this approach works
I lean on two things that don't always sit together: a cognitive-psychology read on how developers and customers actually behave, and an experimentation habit (those 500+ A/B tests at Randstad & JDE) to check what works instead of guessing. I'm still learning, mostly in the open.
Guido has a rare ability to translate community insights into tangible business intelligence, and to bring the business closer to the community.
Projects
Portable professional identity on AT Protocol. A track record built from real community contributions.
Open-source community forums where members own their data. Log in with Bluesky; reputation follows you.
200+ conversations on growth, experimentation & optimization. One of the longest-running CRO podcasts.
What my colleagues say
Recommendation excerpts written by colleagues on LinkedIn
"From the start I got a lot of responsibilities and freedom, which made it a valuable time learning about growth hacking, UX and conversion optimization."
"At Spryker, Guido became one of the key figures driving our community's success. [...] his events not only highlighted Spryker's architectural strengths but also created an atmosphere of energy, fun, and inspiration."
"Guido is an excellent public speaker who gives his audience practical tips on how to create a company culture that embraces evidence-based decision making."
Work with me
A handful of engagements each year. Pick the format that fits what you're trying to achieve.
Retainer
Community strategy, DevRel leadership or running an event or conference, as an advisor or hands-on for 1–2 days a week. Typically 6–9 months.
Talk about a retainerEvent speaker
Keynotes and workshops at your conference, company event or developer meetup. 28 countries, 207 talks so far.
Invite me to speakor just send me a note · follow on Sifa ID