"Guido is a thought leader in community building and developer relations. Any company serious about building an ecosystem should talk to him."
Hi, I'm Guido 👋
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.
21+
years building communities
500+
experiments run
188
events spoken at
27
countries presented in
Right now
via
Sifa ID
- Bluesky Post 2d ago
I like how one of the four "Instant Messaging" options you can add to LinkedIn is still "Skype" (especially since it's the same company behind it all). I do feel that this list could benefit from some additional options don't you think @germnetwork.com @signal.org?
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- Bluesky Post 2d ago
working on getting organization/company data into @sifa.id: combining open data from wikidata.org, peopledatalabs.com and @ror.org already results in a 5.8GB dataset just to be able to properly load "company name" on your career page 😱😅
Open this Bluesky post in a new tab - Bluesky Post 4d ago
Did anyone test if you can move your PDS from W Social to someplace else or if that is being blocked?
Open this Bluesky post in a new tab - Bluesky Post 3d ago
Hurricane "Let's Double-Click On That" is causing power outages everywhere
Open this Bluesky post in a new tab - Bluesky Post 1h ago
oh boy...
Open this Bluesky post in a new tab - Bluesky Post 2d ago
@byjp.me hey, just FYI: id.byjp.me returns a 522 error :)
Open this Bluesky post in a new tab - Bluesky Post 2d ago
@pavadeli.bsky.social op skunk.team/werken-bij/ geeft de link naar skunkteam.activehosted.com/f/5 aan dat jullie AC acount is expired 😅
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- Bluesky Post 2d ago
@tinpotray.bsky.social hey Ray 👋
Open this Bluesky post in a new tab - Bluesky Post 2d ago
@hauri.dev hey man 👋
Open this Bluesky post in a new tab - Bluesky Post 2d ago
@adwatson.bsky.social 👋
Open this Bluesky post in a new tab - Bluesky Post 2d ago
@mathiasverraes.bsky.social hey! 👋
Open this Bluesky post in a new tab - Bluesky Post 3d ago
@laurenshof.online hey, you Sifa profile is eerily empty still 😱
Open this Bluesky post in a new tab - Open this Popfeed review in a new tabPopfeed 10d agoSexistentialAlbum · Robyn8/10
- Open this Popfeed review in a new tabPopfeed 15d agoDe vloek van PolyfemosBook · Evert Hartman9/10
- Tangled Pushed code 16d 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 16d agoLEAN STARTUP metodikaBook · Eric Ries7/10
- Open this Popfeed review in a new tabPopfeed 17d agoThe Man from EarthFilm · Richard Schenkman10/10
- Open this Popfeed review in a new tabPopfeed 18d agoThe Last of UsTv show · HBO9/10
- Open this Popfeed review in a new tabPopfeed 18d agoBeat SaberVideo game9/10
- Open this Popfeed review in a new tabPopfeed 18d agoTowerMadness HDVideo game9/10
- Open this Popfeed review in a new tabPopfeed 18d agoKingdom Rush FrontiersVideo game9/10
- Open this Popfeed review in a new tabPopfeed 18d agoKingdom Rush OriginsVideo game9/10
- Open this Popfeed review in a new tabPopfeed 18d agoRogue TowerVideo game7/10
- Open this Popfeed review in a new tabPopfeed 18d agoMinecraftVideo game9/10
- Open this Popfeed review in a new tabPopfeed 18d agoLokiTv show · Disney+9/10
- Tangled Pushed code 24d agobsky-avatarDynamic avatar rotationOpen this Tangled code in a new tab
- Smoke Signal Going 1mo agoatproto.local federation formation working sessionMay 21, 2026Open this Smoke Signal event in a new tab
- Tangled Pushed code 3mo agoatproto-plc-counterAT Protocol PLC directory counterOpen this Tangled code in a new tab
- Smoke Signal Going 3mo agoCreating the ATmosphereMar 27, 2026Open this Smoke Signal event in a new tab
- Smoke Signal Going 3mo agoFounders & FundersMar 27, 2026Open this Smoke Signal event in a new tab
- Tangled Pushed code 3mo agosifa-lexiconsAT Protocol lexicon schemas for Sifa professional profiles (id.sifa.*)Open this Tangled code in a new tab
- Tangled Pushed code 4mo 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 4mo agobarazo-deployBarazo Docker Compose templates for self-hostingOpen this Tangled code in a new tab
- Tangled Pushed code 4mo agobarazo-lexiconsBarazo lexicon schemas and TypeScript typesOpen this Tangled code in a new tab
- Tangled Pushed code 4mo agobarazo-webBarazo default frontendOpen this Tangled code in a new tab
- Tangled Pushed code 4mo agobarazo-apiBarazo AppView backendOpen this Tangled code in a new tab
- Smoke Signal Going 4mo agoATmosphereConf 2026Mar 26, 2026Open this Smoke Signal event in a new tab
Brands I've worked with
From retail to telecom to financial services, I've helped teams across industries build stronger communities.
freshly published
All articles Writing
188 talks, 27 countries
All talks Talks & speaking
From optimisation to ecosystem thinking
Talk · ATmosphere Conf · Vancouver, CA
Communities that matter to the business
Keynote · Meet Magento NL · Amsterdam, NL
The psychology of contribution
Keynote · DevRelCon · London, UK
Anti-fragile communities
Workshop · Spryker Excite · Berlin, DE
7 hard-learned lessons for reliable AI workflows
Talk · ProductTank · Amsterdam, NL
Proving the monetary value of A/B testing
Keynote · Conversion Hotel · Texel, NL
that's me the psychology edge Svitlana Kulynych Head of Learning Experience, Spryker · worked with me at Spryker
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.
Cognitive psychology
Why developers and customers actually behave the way they do.
Business experimentation
500+ A/B tests at Randstad & JDE. Measure what matters, prove what works.
Community building
Helped grow the Joomla!, Magento, CRO.CAFE and Spryker communities.
(AI) automation
Reliable AI workflows and local-first tooling that earns its keep.
Guido has a rare ability to translate community insights into tangible business intelligence, and to bring the business closer to the community.
things I'm building
Projects
Sifa Building
Portable professional identity on AT Protocol. A track record built from real community contributions.
Barazo Building
Open-source community forums where members own their data. Log in with Bluesky; reputation follows you.
CRO.CAFE Hosting
200+ conversations on growth, experimentation & optimization. One of the longest-running CRO podcasts.
learn by building
All training Training
For engineering teams of 5–12 · Workshop · in-company or cohort
Agentic Engineering
co-led with ExecuroStop typing better prompts. Start delegating to AI agents that ship.
- Delegate to AI agents with clear specs, context and rules instead of better prompts
- Build a complete app together: frontend, backend and API, hands-on
- Walk away with reusable agentic workflows and AI coding rulesets you keep
Find out more
Beginner / intermediate · Workshop · half or full day Intro to Building on AT Protocol
Open social tech for developers
- What AT Protocol actually is, and why it matters for your product
- Set up a PDS, create records, wire a simple Bluesky client
- How communities on open networks are different (and why that's an advantage)
Find out more
kind words
What my colleagues say
Recommendation excerpts written by colleagues on LinkedIn
"His strategic thinking impressed me. Guido understood that communities need sustainable business value, not just engagement metrics. The hackathon projects directly influenced what we built next, including some AI features."
"He is a brilliant presenter, a natural connector, and a trusted advisor who understands both the human and business dimensions of digital commerce. His empathy, humor, and communication skills make him uniquely effective at engaging with people on every level, from developers to executives."
"Guido knows his area of expertise and wants to create long-term and meaningful optimization teams and culture in organizations."
let's make something
Work with me
A handful of engagements each year. Pick the format that fits what you're trying to achieve.
Retainer
Ongoing community strategy, DevRel leadership or fractional community-function work. Typically 1–2 days/week over 3–6 months.
Talk about a retainerTraining
Bespoke in-company workshops on Agentic Engineering or Building on AT Protocol. Public cohorts run a few times a year.
Book a trainingEvent speaker
Keynotes and workshops at your conference, company event or developer meetup. 27 countries, 188 talks so far.
Invite me to speakor just send me a note · follow on Sifa ID