Decentralized Systems & Applications

**Agenda:** * Introduction * Onsite/remote talk & Campfire * Lightning Talks / Fuck ups Open door @ 19:00 Prague time, start 19:30 Once a month on the last Tuesday, we bring together Web3 builders - tech. founders / smart contract programmers / auditors. Whether you are a Web2 developer interested to learn more or a senior in the Web3 sphere, our meetup is for you! Enjoy a nice cold lager and get ready to blow your mind on what’s possible in blockchain. Our upcoming meetup will be again hosted at Decada - a crypto-friendly cafe bar with an inviting atmosphere and friendly staff. Decada's commitment to innovation makes it the perfect venue for gathering like-minded people. They are happy to invite us to join them for an evening of fresh perspectives, vibrant discussions, and good company at Decada. Have something to share like a project or protocol in Web3? You get the floor for 5 minutes. Please signup here: [https://docs.google.com/document/d/1Dm3De2kWn00STS44Y0vyXtZsFd1A5TUU7sVH0aydr0s/edit](https://docs.google.com/document/d/1Dm3De2kWn00STS44Y0vyXtZsFd1A5TUU7sVH0aydr0s/edit) The meetup is focused on project conceptual design and smart contract development. Not frontends and JS Frameworks - there are other meetups for those. Example topics are inheritance approaches, comparison of proxies, their gas, size, ect. Other talks will be about cross chain / layer calls, blind signing, security, clever hacks, and more. Regarding contracts level - any smart contracts, i.e. not limited to EVM based. Have questions or want to share something cool with us? Join our community group on Telegram to get updates or to share knowledge: [https://t.me/+eA4eMYlEo-k2ZGVk](https://t.me/+eA4eMYlEo-k2ZGVk) We look forward to seeing you all!

The perfect code doesn't exi... by Martin Hořeňovský Perfect code doesn't exist, right? There are always tradeoffs, complications and hidden complexities in the way. At least until now. I wrote the perfect C++ function, and I'll show it to you. What's more, I'll prove it to you, using all the different automated tools and approaches we commonly rely on during development: compiler warnings, static analysis, code coverage and others. In practical terms, I will showcase various tools we use during development; what issues they can catch, what issues they do catch, and why they protect us from Murphy, but not Machiavelli. Timetable: 18:00 Get together, setup, socialize 18:30 talk starts ??:?? talk ends, more socializing For those who want to join online here is the **[ZOOM LINK](https://us06web.zoom.us/j/87626916146?pwd=tE0xBia9Mnd8t2IGshtNpwyekQ9Zle.1)** While you wait why not join our **[DISCORD SERVER](https://discord.gg/EPMXNGuHXG)**

**Anotace přednášky:** AI nástroje píšu kód rýchlejšie ako kedykoľvek predtým. No rýchlosť bez kontroly kvality je len technický dlh vo väčšom meradle. V tejto prednáške sa pozrieme na to, ako LLM skutočne fungujú, ako inteligentne pracovať s kontextom a ako z AI dostať konzistentný, kvalitný výstup. Ukážeme si, ako používať AI na písanie testov, a prečo je verifikácia kódu kľúčová pre tímy, ktoré sa na AI pri vývoji výrazne spoliehajú. **Čo si odnesieš:** * Pochopíš, ako LLM a AI agenti skutočne fungujú pod kapotou * Naučíš sa pracovať s kontextom tak, aby si z AI dostával lepšie výsledky * Zistíš, ako písať čisté testy pomocou AI * Pochopíš, prečo je verifikácia nevyhnutná, keď AI píše väčšinu kódu **O řečníkovi:** Filip Hric začal svoju kariéru tým, že zdieľal to, čo sa naučil o testovaní. A nejako sa to rozbehlo. Jeho blog prekročil 2 milióny prečítaní, jeho kurzy absolvovali tisíce vývojárov a testerov a stal sa jedným z mien, na ktoré sa ľudia v oblasti testingu a quality engineeringu odvolávajú. Dnes spolupracuje s vývojovými tímami na tom, ako zabudovať kvalitu priamo do ich procesu, vystupuje na konferenciách po celom svete a snaží sa, aby éra AI nebola strašiakom pre tých, ktorým záleží na softvéri, ktorý naozaj funguje. Žije na Slovensku so svojou ženou a štyrmi deťmi. Beháva a hrá na gitare. Těšíme se - organizátoři [Pro:]Test! **POZOR**! Meetup probíhá na adrese: **Lihovarská 1060/12, 190 00 Praha 9-Balabenka**, NE v sídle Accentura na Holešovicích. **Setkání probíhá osobně na místě bez streamování. Pořizovat budeme záznam, který následně zveřejníme na našem [YouTube](https://www.youtube.com/@profesionalni_testeri).**

**Why are so many of us exhausted** — not from hardship, but from **the relentless pressure to do more, be more, optimize more?** Korean-German philosopher Byung-Chul Han has a diagnosis, and it might make you look at your own daily life differently. The Burnout Society is a short, sharp book that asks **why burnout, depression, and anxiety have become the characteristic experiences of our time — and whether the problem runs deeper than stress management or work-life balance.** Byung-Chul Han is a Korean-German philosopher based in Berlin who writes short, dense books diagnosing what’s gone wrong in contemporary life. He writes short, dense books — often under 100 pages — that draw on continental philosophy, cultural theory, and East Asian thought to diagnose something gone wrong in contemporary life. The Burnout Society, first published in German in 2010, was one of his early breakthroughs and one of his most widely read works. Join us for a close reading and open discussion. No prior knowledge of Han or continental philosophy is required. Participants are encouraged to read the text in advance and come prepared with a passage, a question, or a point of resistance. (I didn’t realize that the internet archive option is unavailable. If you can’t easily find a copy, please drop me a message here and I’ll help you out)

\~FREE EVENT\~ Meet Locals & internationals People Every Tuesday & Make New Friends🙂 For introverts and shy people (we all are sometimes), we have ice-breaking games and more... so feel free to come by. Everyone is invited to enjoy amazing Cocktails in 135kc only🍸 Beer in 49 kc 🥂🍻 It is organized after our Biggest Event in Central Europe with 234 people in a single event. 🙂 📍LOCATION TEQUILA TALES BAR & MUSIC CLUB Újezd 409/19, 118 00 Malá Strana, 118 00 Prague, Czech Republic (Nearest tram stop- Hellichova & Ujezd) ❓Questions❓ Follow & write to https://www.instagram.com/tequilatales_prg/ *** \~AKCE ZDARMA\~ Každé úterý se seznamte s místními a mezinárodními lidmi a najděte si nové přátele🙂 Pro introverty a stydlivé lidi (všichni jsme někdy) máme hry na lámání ledu a další... tak neváhejte a přijďte. Všichni jsou zváni k vychutnání úžasných koktejlů jen za 135 kč🍸 Pivo za 49 kč 🥂🍻 Je pořádána po naší největší akci ve střední Evropě s 234 lidmi na jediné akci. 🙂 📍 POLOHA TEQUILA TALES BAR & MUSIC CLUB Újezd 409/19, 118 00 Malá Strana, 118 00 Praha, Česká republika (nejbližší tramvajová zastávka- Hellichova & Újezd) ❓Otázky❓ Sledujte a pište https://www.instagram.com/tequilatales_prg/

Anyone up for having an after work pint? :) Join me at Becketts Irish pub at 7pm! Try to come on time, the booking is on my name. :) PS. A symbolic fee of 40 CZK will be collected in order to cover the Meetup membership subscription, thank you for understanding and hope to see you all there! Maya

\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* **RISING SHADOWS** Far to the west of the Sword Coast, the Moonshae Isle rise from the storm-wracked Sea of Swords. Cloaked in mists and draped in legend, the Moonshaes are more than mere rocks. For them courses the primal power of the Earthmother who maintains the precarious Balance between creation and destruction. But now that is all in danger. A new foe rises from the Shadowfell to threaten the Balance. Known only as the Slain, this mysterious adversary casts a deepening shadow of despair upon the Moonshaes. **CCC-BMG-MOON2-3 The Eye in the Mist (Level 1 - 4)** The events at Dynnegall revealed evidence that a new threat to fey and Ffolk may have emerged on Moray. The ties to prophecy are too strong to ignore. If true, every moment is critical. The Earthmother herself shudders as attention turns to the Eye in the Mist, a moonwell in the forest of Moray’s eastern coast. \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* **CAST IDENTIFY: WHAT IS ADVENTURERS LEAGUE?** Adventurers League (AL) is a D&D public play program - start the story at one table, and bring your character to the next part of the adventure at any AL table in the world! **New to D&D?** No problem! Our DMs will be happy to help you - just bring your imagination and the items below! \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* **ADVENTURING GEAR: WHAT TO BRING** Mandatory: ♦ 200 CZK (pay in cash or by QR code) Recommended: ♦ Snacks ♦ Pen or pencil ♦ Polyhedral dice (or borrow some of ours) ♦ A Lv 1 - 4 AL legal character \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* **STUCK IN A PIT TRAP: CANCELLATIONS** If you realize you cannot join us, please do change your RSVP to "No" as soon as possible - there may be other players waiting to join. See you there, Adventurer, and may your dice roll high! ♦ Discord: https://discord.gg/WXvRrksrT4 ♦ Facebook: facebook.com/ddalprague ♦ Contact: ddalprague@gmail.com ♦ Adventurer's League: https://www.dndbeyond.com/posts/1676-what-is-adventurers-league ♦ Current Player's Guide: [https://drive.google.com/file/d/1yaVW5QrBNCaXPJ1uOSCLaa7v4BCBnUBi/view?usp=sharing](https://drive.google.com/file/d/1yaVW5QrBNCaXPJ1uOSCLaa7v4BCBnUBi/view?usp=sharing)

**A vertical sandstone wall rising straight from the banks of the Elbe. Děčín Castle staring at you from across the river. 16 routes bolted into solid rock, ranging from first-timer-friendly to genuinely hard. And it's 90 minutes from Prague by train.** Pastýřská stěna — Shepherd's Wall — is the longest via ferrata in the Czech Republic and the only one located right in the middle of a city. You climb from the Elbe embankment to the top of a 150–170m sandstone cliff, with the river canyon and castle below you the entire way. It's the perfect introduction to via ferrata — or a great morning workout if you've done it before and want to push harder lines. What makes this place special is that you can do it multiple times in one day, on different routes. Beginners start on the easier B lines and get a feel for the gear. More experienced climbers go straight for the D routes and find they're harder than labelled. Everyone ends up at the same viewpoint on top, looking down at the same improbable view. **Who's this for?** Everyone. Literally. Kids from age 12, first-timers, experienced climbers — the wall has something for all of you. The only deal-breaker is a serious fear of heights. If you're on the fence about whether you can handle it: you can. Come and find out. *** **🗓️ The Day** 🚉 **08:00 — Meet at Praha hl.n. (main entrance)** We board the direct train to Děčín together. \~90 minutes, cheap ticket bookable on the **ČD app** (cd.cz). Hop on at any station along the Praha–Děčín line if that's easier. 🥾 **\~09:45 — Děčín hl.n. → Pastýřská stěna** 10-minute walk from the train station along the Elbe embankment to the base of the wall. You'll see it from the station — it's hard to miss. 🧗 **\~10:00 — Gear up & briefing** Rental at **Active Point Děčín** (\~150m from the wall, towards Tyršův most) — full set (harness, Y-lanyard, helmet, gloves) for **\~250 CZK/day**. No need to bring your own gear. We run a quick safety briefing for first-timers before anyone clips in. 🧗 **\~10:30 — Climbing** 16 routes, 150–170m each, grades B to E. We split into groups by experience and climb at our own pace. **Checkpoints at the top of each route** — we regroup, rest, and decide whether to go again or call it a day. ⚠️ **Important grade note:** The routes here are graded by the builder — and they run consistently harder than labelled. B feels like C, C feels like D. Come prepared for more than the grade suggests. 🍺 **\~13:00 — Lunch on the Elbe embankment** Cafés and restaurants right by the river. Sit in the sun, order something cold, and look up at what you just climbed. 🧗 **\~14:00 — Second round (optional)** Those who want more lines go back up. Those who are done explore the embankment or Děčín Castle nearby. 🚉 **\~16:00 — Firm meeting point at Děčín hl.n.** We catch the train back together. Back in Prague by \~17:30. *** **⛈️ Weather note** Climbing is strictly prohibited when it rains or the wall is wet — this is a safety rule, not a suggestion. We'll monitor the forecast in the WhatsApp group and confirm the day before. If conditions are bad, we reschedule. *** **🧗 Gear rental on-site** Everything you need is available at **Active Point Děčín**, \~150m from the wall: | Item | Cost | | ---- | ---- | | Full via ferrata set (harness, Y-lanyard, helmet) | \~250 CZK/day | | Gloves | Included or small extra | No need to bring your own kit. If you have your own gear, bring it — but it's not required. *** **🎒 What to bring** * Closed shoes with non-slip soles (trail runners are perfect, no sandals or hiking boots) * 1.5–2L water + snacks or cash for lunch * Light backpack you can climb with * Rain layer just in case * Cash for gear rental (card may not be accepted at the rental shop) **Dogs:** Not recommended on the wall itself · **Kids:** Suitable from age 12 with experience *** **💰 Cost (per person)** | Item | Cost | | ---- | ---- | | Train Praha ↔ Děčín (return) | \~150–200 CZK | | Gear rental | \~250 CZK | | Lunch | bring your own or \~200–300 CZK | | **Total** | **\~600–750 CZK (\~€25–30)** | This is completely **non-profit** — no fees, no markups. You only pay your own costs. *** **🚌 Option A — Train (recommended)** Praha hl.n. → Děčín hl.n., direct, \~90 min, hourly service. Cheapest and easiest — no parking, no driving, just get on the train. **🚗 Option B — Carpool** \~1.5h drive from Prague. Parking directly by the wall along the Elbe embankment (can get busy on summer weekends — arrive early). Coordinate in WhatsApp after RSVP. *** **RSVP here** and you'll be added to our WhatsApp group — that's where we share the exact train time, confirm the weather, and sort any last-minute details. See you at the wall. 🧗

Looking for an authentic way to experience Prague while meeting new people from around the world? Join us for a unique evening exploring **Czech beer culture** through some of Prague's most authentic pubs and breweries. This is not a pub crawl—it's a cultural experience where you'll discover local traditions, hear fascinating stories, taste great beer, and connect with fellow travelers, expats, and internationals. 🍺 Visit 5 authentic Czech pubs and breweries 📖 Learn Czech beer traditions and etiquette 🍻 Taste traditional and modern Czech beers 🥨 Czech beer snacks included 🏙️ Hear stories about Prague, brewing, and local culture 🌍 Meet international people and make new friends Whether you're new to Prague, visiting for the weekend, studying abroad, or have lived here for years, this experience offers a fun and relaxed way to discover one of the most important parts of Czech culture. 📅 Every Friday ⏰ 18:00 – 22:00 💰 890 CZK per person 👥 Maximum 10 participants for a more personal experience ⚠️ Minimum 4 participants required to run the tour What makes Czech beer culture so special? Come and find out while enjoying a memorable evening in great company. You can pay for the trip via: • Bank transfer: 7392420507/6363 • Revolut: @augustetqc 🍻 ***Real Beer. Real Stories. Real Prague.***

Join us for Symposium! 🌞🌻🌳 In antiquity, a symposium was a gathering of friends who came together to recline around a shared table, where wine and conversation flowed freely into the night. Together, they would choose a topic and take turns speaking, listening, and laughing—guided by the rhythms of drink and dialogue. Inspired by this tradition, our Symposium has no set theme. It's an invitation to come together with other curious minds, to offer up questions or ideas, and to vote together on where to begin. Whether you're hungry for connection or simply seeking space to speak and be heard, you're warmly welcomed to join the conversation. Symposium will meet in parks throughout Prague, embracing the sunshine and pleasant weather while we have it. Bring a blanket or something to sit on. There’s no cost to join, but please bring a snack or drink to share, if you're able. Most of all, bring a curious mind and a willingness to learn from the insight of others. Feel free to bring a friend or two--also, children and friendly dogs are welcome! \*\*\* If the weather doesn't cooperate, we'll try to find an alternate venue—so keep an eye on the event chat or your email for updates. Also, despite the origins of the Symposium, our goal is not necessarily to get drunk and the organizer would encourage you not to come with that sole purpose in mind. :) The first 45 minutes of the event will be dedicated to simply getting to know one another, and we highly encourage you to join for this part. We will then vote whether to continue free conversation, to join together in a single conversation, or to split up into multiple groups. Afterwards, you’re welcome to stay or follow onto any spontaneous activity that unfolds. A note on attendance: If you need to cancel, please do so at least a few days in advance and update your RSVP accordingly. This helps honor the host’s efforts and makes space for others who would like to attend. Repeated last-minute cancellations or no-shows may result in being placed on the waitlist for future events.

You went on that retreat, read the book, committed to meditating daily. And here you are at 3 am, drunkenly staring down a Žižkov doner, wondering what happened. Come share your spiritual misadventures. You can bring a story, poem, insight, or simply come and hang out. This is a space for anyone interested in spirituality and meditation. All paths and experiences are welcome! We are meeting at Stromovka Park, near Stromovka Fountain. Bring something to sit on. Pets are always welcome! We’ll start with an opening circle, short group meditation, then move into sharing and discussion. If you arrive while we're meditating, feel free to join us quietly.

This group is for anyone who writes - for any reason. Have a thesis or article you need to write? Trying to finish a novel or an academic paper? This group is for you. We are currently meeting in-person at Locus Workspace. If you have any questions, contact Sonya Lano here or on Facebook or Messenger (https://www.facebook.com/sonya.lano). We start at 9:00, introduce ourselves, and share a few words about what we're working on and what we hope to accomplish during the session. At the end of the session, you can give us a brief recap of how it went. We'll break at noon. The afternoon session starts at 2:00 pm. You're welcome to join both sessions or just one. Please come as close to 9:00 as you can if you come for the morning session. If you come to the afternoon session, we are usually back by about a quarter to 2:00.

Welcome to the international Café Philo in Prague. We meet every first Saturday of the month in the cosy [Café Millème](https://store11473398.ecwid.com) in the center of Prague. We choose a participant randomly, by lottery, who then has the privilege to determine the topic of our discussion. We will reflect, ponder and exchange arguments until our brains are on fire. Philosophy isn't just something for universities, it is a way to open your mind to new thoughts and questions. No application is necessary, there is no entrance fee and there are no prerequisites for participating, except curiosity and respect for other people. We meet from 17:15 until 18:45 to follow together the white rabbit into the wonderland of philosophy... More information about me under this [link](https://sophonautik.ch/english/).

*Sorry for the 2 month break but I had to deal with some family member health issues, but we are now back!!* **LOCATION - THE DAILY GROWLER -** **2812 Fishinger Rd, Upper Arlington, OH 43221** Over the years, we’ve heard two requests constantly: 1. A place that was quieter and possibly private. 2. “I wish they accepted Bitcoin.” We’ve finally found a solution to these requests with The Daily Growler. We’ll have access to their private room, and you’ll be able to pay your tab with Bitcoin. Join us for a fun and relaxed social event! Enjoy delicious food and drinks as we chat about the latest news in the Bitcoin world. Everyone is welcome, whether you're looking for guidance, have questions, or just want to meet like-minded people. These social evenings are a great opportunity to make new friends and enhance your experience at the larger events throughout the year. We look forward to seeing you there! PSA: If the attendee RSVP seems low, keep in mind that most of our attendees come from X and not [meetup.com.](http://meetup.com./) You are welcome to come and become a part of our online community. Recordings of past guest speakers are available on our YouTube channel [https://www.youtube.com/@columbusbitcoin](https://www.youtube.com/@columbusbitcoin)

Want to be a speaker? submit your talk to our Call for Presenters!!! https://sessionize.com/azure-cbus-2026/

We have moved to guild.host. Look us up there. https://guild.host/events/buckeye-cocoaheads-rcavwd

In this local meeting, you will discover knowledge that you can use to get over the past. The key to improving your personal motivation, self-confidence, and happiness is to get over your painful memories. When you become free of your past, you will be free from stress, anger, anxiety and depression. Studies show that negative emotions can affect your health. By being free of negative emotions, believe it or not, you will most likely even look younger, feel more energetic, and become healthier! Be sure to click on the red "Attend" button below to come to this local event. We look forward to seeing you there. This group is brought to you by the Dianetics and Scientology life improvement center.

We're planning a hands-on technical session focused on building AI solutions in ServiceNow - think skills, agents, and real-world use cases. If you’re curious about AI on the platform, RSVP now and stay tuned for more details. Let's build together!

You can sleep in on the Sesquicentennial (observed), we’re shifting to the following Friday. But join the local UX community for a chat and some biscuits to catch up. If you were in CA for Figma Config, tell us all the lines and you can tell me how I can animate an SVG without coding it by hand, and why I’d even want to. Thanks to the team at Nationwide of supporting the group.