"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 5d ago
Is it too cynical of me to think that this will just be used to train models to write less AI-slop sounding texts...?
Open this Bluesky post in a new tab - Bluesky Post 18h ago
I feel like it would make sense that if you use a custom domain as a handle that the apps would automatically add a link to that website? Often find myself typing handle domains into a browser just to get to their website? Meanwhile: maybe just add your domain into your description as a link?
Open this Bluesky post in a new tab - Bluesky Post 13h ago
live in: 🇳🇱 born in: 🇳🇱 parents: 🇳🇱🇳🇱 grandparents: 🇳🇱🇳🇱🇳🇱🇳🇱 great grandparents: 🇳🇱🇳🇱🇳🇱🇳🇱🇳🇱🇳🇱🇳🇱🇳🇱 been to: 🇳🇱🇨🇼🇩🇪🇵🇹🇺🇸🇨🇦🇧🇪🇱🇺🇫🇷🇦🇹🇨🇭🇬🇧🇮🇪🇬🇷🇵🇱🇨🇿🇸🇮🇷🇺🇧🇾🇦🇪🇳🇴🇩🇰🇸🇪🇪🇪🇷🇴🇭🇷🇮🇹🇭🇺🇪🇬🇧🇷🇦🇷🇮🇳🇮🇩🇻🇳🇨🇳🇱🇦🇭🇰🇸🇬 and currently on holiday in 🇪🇸 Clearly using the 6th one to try to make up for the extremely boring first 5 points 😂
Open this Bluesky post in a new tab - Bluesky Post 2d ago
Getting excited for next week! Still need to figure out how the telescope works in the eclipse-setting 😅 🌑 Total
Open this Bluesky post in a new tab - Bluesky Post 14h ago
@theriotnrrd.eurosky.social Hey Dominic 👋 you suggested @sifa.id to add Mastodon links, but... we already offer that? Go to Links > Add Link > Fediverse. And when you verify the link, your Mastodon posts will show up in your /activity timeline as well
Open this Bluesky post in a new tab
- Bluesky Post 1d ago
Whoah #Cap-de-Creus
Open this Bluesky post in a new tab
- Bluesky Post 6d ago
Concert-at-Sea, Spanish edition #bamboleo #sunset #beach
Open this Bluesky post in a new tab - Bluesky Post 4d ago
Anyone in my network going to www.rebuild.net #2 in Helsinki (Aug 30 – Sep 01) or #3 in Paris (Dec 15 – Dec 17)?
Open this Bluesky post in a new tab
- Bluesky Post 2d ago
@michielbdejong.com 👋
Open this Bluesky post in a new tab - Bluesky Post 3d ago
Euh IDK? How do I appear to you?
0 Open this Bluesky post in a new tab - GitHub Pushed code 17h agoGitHub
- Open this Bookhive review in a new tabBookhive 20h 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 12d agoFuturamaTv show · FOX8/10
- Open this Popfeed review in a new tabPopfeed 18d agoGodzillaFilm · Roland Emmerich8/10
- Open this Popfeed review in a new tabPopfeed 20d agoSugarTv show · Apple TV9/10
- Open this Popfeed review in a new tabPopfeed 25d agoFinal SpaceTv show · Adult Swim10/10
- Open this Popfeed review in a new tabPopfeed 26d agoPantheonTv show · Netflix10/10
- Open this Popfeed review in a new tabPopfeed 1mo agoSexistentialAlbum · Robyn8/10
- Open this Popfeed review in a new tabPopfeed 1mo agoDe vloek van PolyfemosBook · Evert Hartman9/10
- Tangled Pushed code 1mo 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 1mo agoLEAN STARTUP metodikaBook · Eric Ries7/10
- Open this Popfeed review in a new tabPopfeed 1mo agoThe Man from EarthFilm · Richard Schenkman10/10
- Open this Popfeed review in a new tabPopfeed 1mo agoThe Last of UsTv show · HBO9/10
- Open this Popfeed review in a new tabPopfeed 1mo agoBeat SaberVideo game9/10
- Tangled Pushed code 1mo agobsky-avatarDynamic avatar rotationOpen this Tangled code in a new tab
- Smoke Signal Going 2mo agoatproto.local federation formation working sessionMay 21, 2026Open this Smoke Signal event in a new tab
- Tangled Pushed code 4mo agoatproto-plc-counterAT Protocol PLC directory counterOpen this Tangled code in a new tab
- Smoke Signal Going 4mo agoCreating the ATmosphereMar 27, 2026Open this Smoke Signal event in a new tab
- Smoke Signal Going 4mo agoFounders & FundersMar 27, 2026Open this Smoke Signal event in a new tab
- Tangled Pushed code 4mo agosifa-lexiconsAT Protocol lexicon schemas for Sifa professional profiles (id.sifa.*)Open this Tangled code in a new tab
- Tangled Pushed code 5mo 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 5mo agobarazo-deployBarazo Docker Compose templates for self-hostingOpen this Tangled code in a new tab
- Tangled Pushed code 5mo agobarazo-lexiconsBarazo lexicon schemas and TypeScript typesOpen this Tangled code in a new tab
- Tangled Pushed code 5mo agobarazo-webBarazo default frontendOpen this Tangled code in a new tab
- Tangled Pushed code 5mo agobarazo-apiBarazo AppView backendOpen this Tangled code in a new tab
- Smoke Signal Going 5mo 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.
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.
Training
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
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)
What my colleagues say
Recommendation excerpts written by colleagues on LinkedIn
"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."
"While working in his team I was impressed by his skills to enable a culture of freedom, responsibility and learning from each other."
"He delivered results that mattered: developer feedback shaped our product roadmap, engineering teams connected directly with external developers, and our community became stronger after each challenge."
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