Yarn

**Python is often celebrated as the universal glue that can do anything, but what happens when your project scales, a trace breaks, or a lack of architecture becomes your biggest bottleneck?** Join us on **Tuesday, April 21,** for an evening focused on the realities of operating Python at scale. We're bringing together developers and engineering leads from Applifting, ROUVY, and DX Heroes to share hard-won lessons on everything from clean architecture to distributed systems Let's meet in the **Applifting meetup space**, both in person and online. **We’ll start at 18:00.** 👉 [Register here](https://applifting.io/events/python-crew-talk-it-scales-until-it-doesnt) 👈 **if you want to attend in person. Spaces are limited and our event planner Anetka would be sad if we had to turn you away at the door!** **Who’s speaking?** We will kick off with two lightning talks. First, **[Ondřej Doskočil](https://www.linkedin.com/in/ondrejdoskocil/)**, Python tech lead at Applifting, will challenge the mindset that clean architecture is "too Java" for Python and show how AI tools can help you adopt proper structure as your projects scale. **[Stanislav Gurník](https://www.linkedin.com/in/stanleygurnik/)**, backend chapter lead at ROUVY, will follow up with hard-won lessons from the trenches of distributed systems, exploring what it takes to move event-driven Python services from "it works" to "it scales". Then, they will be joined for the panel discussion by **[Jiří Maňák](https://www.linkedin.com/in/manakjiri/)**, software engineering team lead at DX Heroes, and **Martin Jiřík**, senior DevOps engineer at ROUVY. **We look forward to meeting you!** **Schedule:** **17:30 – Doors open** * Get your ticket ready, say hello to others, and have a drink with us. 🥂 **18:00 – Introduction by Filip Kirschner** * Our co-founder Filip will give you a short welcome and introduce our speakers. **18:15 – Architecture in Python: Breaking the 'too Java' taboo with Ondřej Doskočil** * *Why a lack of structure becomes the real problem as projects scale, and how to successfully adopt clean architecture in Python.* **18:35 – Lessons learned from operating Python services in event-driven architecture with Stanislav Gurník** * *Distilling hard-won lessons on the architectural pivots that move event-driven Python services from "it works" to "it scales."* **18:50 – Short break** * *Time to stretch, refill drinks, and chat a bit.* **19:00 – Panel discussion with Ondřej Doskočil, Stanislav Gurník, Jiří Maňák, and Martin Jiřík** * *An open discussion on scaling Python and adopting clean architecture, exploring the realities of distributed systems, operations, and team collaboration.* **20:00** — **Q&A session** * *Your turn. We’re open to any questions or comments you have.* **20:30 – Networking, food & drinks 🍻** * Snacks and drinks, including draft beer, will be available for you all evening. Get ready to network with Applifters! **22:00 – Time to say goodbye!** * Some of us may move on to a pub, but the doors of Applifting are closing, and we'll look forward to seeing you next time! For capacity reasons, **please let us know if you will** [attend in person](https://applifting.io/events/python-crew-talk-it-scales-until-it-doesnt) or participate online. The presentations will be streamed, but we would love to see you there. We look forward to meeting you!

\~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/

Čekání je u konce - jedeme dál! Po povedeném návratu se Research Tuesday vrací podruhé. Navazujeme přesně tam, kde jsme minule skončili: u sdílení zkušeností, otevřených diskusí a upřímného pohledu na naši práci bez příkras. **💡 Atmosféra: Bez kamer, jen diskuse** Jestli jsi tu poprvé, připomínáme naši „tajnou ingredienci“: meetupy nenahráváme ani nestreamujeme. Dává nám to svobodu mluvit otevřeně o tom, co fungovalo – i co ne. **🗺️ Téma měsíce: Když UX opustí obrazovku** Co když zákaznická cesta nezačíná ani nekončí v jednom rozhraní, ale vede přes digitální touchpointy do fyzického prostředí, a pak zase zpátky? Co když uživatel neřeší aplikaci, ale snaží se ve stresu a pod časovým tlakem najít správné dveře v nemocnici? **Michaela Holubec Birtusová** UX výzkumnice, facilitátorka a service designérka, která se pohybuje na pomezí digitálních a fyzických služeb. Dlouhodobě působí v organizaci Czechdesign, kde se věnuje především projektům ve veřejném sektoru, od municipalit po zdravotnictví. Kromě toho pracuje na volné noze pro další klienty, kterým pomáhá s výzkumem, facilitací a nastavováním služeb tak, aby odpovídaly reálným potřebám lidí. V posledních letech se intenzivně zaměřuje na výzkum orientace (wayfindingu) ve zdravotnických zařízeních. V rámci výzkumného projektu podpořeného TAČR se podílí na výzkumu, který kombinuje kvalitativní metody, testování v terénu, eye-tracking i VR, s cílem navrhovat navigační systémy, které skutečně fungují. Michaela nasdílí své zkušenosti z výzkumu orientace (wayfindingu) ve zdravotnických zařízeních. Otevře témata, která se v digitálu často neřeší – práci s fragmentovanou pozorností, kontextem, stresem nebo chybou. Probereme i to, jak důležitá je v tomto kontextu přístupnost a jak ji do výzkumu zahrnout co nejvíce. Michaela ukáže case study jako otevřený vhled do procesu: co fungovalo, kde si tým nebyl jistý a kde narážel. **Nové místo & káva:** Tentokrát se potkáme v útulném prostředí **kavárny Ruelto na Andělu**. Abychom podpořili majitele, kteří nám vyšli vstříc, nebudeme tentokrát zajišťovat externí catering. Na místě si ale můžete koupit jejich skvělou výběrovou kávu a lahodné koláčky. **🕒 Agenda:** * **09:00 AM** – Otevření dveří & ranní networking * **9:30 AM** – Úvodní blok: Když UX opustí obrazovku: Jak zkoumat orientaci ve fyzickém světě * **10:30 AM** – Otevřená diskuze * **11:30 PM** – Závěr & networking * **🧸 Hlídání dětí na vyžádání:** Research Tuesday stavíme na tom, že profesní rozvoj má být přístupný všem. Chceme podpořit i rodiče malých dětí, aby mohli zůstat v kontaktu s oborem a potkávat se bez zbytečných překážek. **Máte zájem o hlídání?** Rádi ho na místě zajistíme, ale potřebujeme vědět, jestli o něj bude zájem. Dejte nám vědět v komentářích nejpozději do pondělí do 8:00, jestli službu využijete a pro kolik dětí. Podle toho rozhodneme, jestli ji zajistíme. **🎟️ Důležité informace:** **Vstupenky:** Vstupné na Research Tuesday je dobrovolné. Kapacita je omezena na **35 míst**, abychom udrželi osobní a otevřenou atmosféru. **Rezervace:** Zarezervuj si místo včas. Pokud se ti plány změní, prosíme, uvolni místo ostatním. **Těšíme se na známé tváře i nové účastníky!** Ivana, Lucie, Martin

~~Because nothing says “midweek crisis” like screaming pop ballads with strangers~~ So you’ve survived Monday... congrats! Celebrate by joining us **every Tuesday** for the most *questionable life choices* you’ll never regret — Karaoke Night! **FREE ENTRY** – because we know you blew your paycheck on brunch last weekend. 🧍‍♀️👨‍🦯For the socially allergic (aka shy or introverted), we’ve got **ice-breaking games** that are only mildly awkward. You might actually meet someone who *also* sings off-key. Soulmates? Maybe. 🍸 Cocktails for **135 Kč** – dangerously tasty. 🍺 Beer for **49 Kč** – cheaper than therapy. 📍 **WHERE THE MAGIC HAPPENS** **TEQUILA TALES BAR & MUSIC CLUB** Újezd 409/19, Prague 1 (Tram stop: Hellichova or Újezd – don’t pretend you don’t use Google Maps) 📲 Stalk us or message your future karaoke group here: [https://www.instagram.com/tequilatales_prg/](https://www.instagram.com/tequilatales_prg/)

We will discuss our reactions and interpretations of Flannery O'Connor's story about the post-segregationist South, readable online [here](https://jerrywbrown.com/wp-content/uploads/2020/02/Everything-that-rises-must-converge-OConner-Flannery.pdf). This is an unofficial continuation of our discussion of O'Connor's story we read last time, but if you weren't there you're still welcome to attend this one as there will be plenty to discuss regardless. I look forward to speaking about it with you!

Join us with Pohoda at their benefit concert to help set up and clean up, whilst enjoying a cold beer and great music! Pohoda is a charity that supports quality of life for mental disabilities in adults, including providing health and social services. Their benefit concerts engage their community and provide fundraising for their mission. If you have any questions, contact Julia +420 737 890 656

**3x3 Basketball** practice in **Gymnázium Na Pražačce** indoor basketball court. **Start at 19h00**. Everybody is welcome, no age, gender nor any restriction of any type to join. We got a full field, rotating with 3x3 matches on each side. Cost: **90 crowns**. Please send the money using the **QR Code** stored here: https://imgur.com/a/thtAJd0 In case of any Opt-out within 24h of the session, or no show, the payment will be due (you still can ask someone to come instead of you, as your spot will be booked)

We’re meeting again for our fourth knitting and crocheting gathering in Prague! With each meetup, our little community becomes more warm, welcoming, and inspiring—and we’d love for you to be part of it. Join us for a few cozy hours of crafting, chatting, and exchanging tips and ideas. Bring your knitting or crochet project (or just your curiosity), and enjoy a friendly, no-pressure atmosphere. New faces are always welcome, and beginners are encouraged to join!

Learning Czech can be hard and demotivating, especially when studying alone. **This meetup is a shared study session where we come together to stay focused, motivated, and make progress — each in our own way.** This is a co-learning / co-studying session, not a class. There is no teacher, no lesson, and no study material provided. Everyone comes with their own resources and studies independently, in a shared environment. 🧠 **How it works** • We all bring our own material: • textbooks • homework from a Czech course • Duolingo or other apps • reading practice • vocabulary review, etc. • We mainly work individually • We are free to: • ask questions • help each other • share tips and resources • No teacher, no formal structure, no pressure 👥 **Who is it for?** • Czech learners of all levels • Non-Czech speakers (expats, internationals) • Czech native speakers are welcome if they want to help, but this is not a language exchange ⏱ **Practical info** • Location: Cafedu 12, Škrétova 490, 120 00 Praha 2 (Metro A and C, Muzeum station) • Duration: 2 hours, or less or more, as you want • Group size: small group for now • Free event — please support the café by ordering a drink ☕ If you’re learning Czech and lack motivation when studying alone, come join us — let’s find it together 🙂

**Hosted by Sky Czech Republic.** Doors are open from 5:30 pm, talks will start at 6:00 pm. **1\. Marek Svitok \(Sky\) \- Elegance and Safety in Goroutine Management** Concurrent programming is a core strength of Go, but managing multiple goroutines while handling errors and synchronization can quickly become complex and error-prone. The golang.org/x/sync/errgroup package provides a simple and effective abstraction for running multiple goroutines concurrently, propagating the first error encountered, and ensuring all routines complete before proceeding. In this article, we explore why errgroup is a valuable tool, how to use it effectively, and what design patterns emerge from its usage. We also examine how one might implement similar functionality manually, highlighting the pitfalls and edge cases that make a manual approach cumbersome. By comparing manual implementations with the idiomatic errgroup usage, we aim to demonstrate why adopting this package leads to safer, cleaner, and more maintainable concurrent code in Go. **2\. Vilibald Wanca \- Nail the Basics \- S01E03** Go does not use `try/catch` for normal error handling. Instead, it treats errors as explicit return values, while `panic` is reserved for truly exceptional or unrecoverable situations. A panic stops normal execution, runs deferred calls, and can only be intercepted with `recover` inside a deferred function. This makes `panic/recover` closer to an emergency escape hatch than a general exception system. The result is a model that favors clarity and explicit control over hidden flow. By attending the event I agree that photographs and video recordings from this event may be used by Sky Czech Republic for employer branding and promotional purposes across company websites, career pages, social media, third-party profiles, and other communication materials.

Filozofování o životě a o všem ostatním pro všechny, bez vstupného a bez přihlášky: Co si přejete, s čím si lámete hlavu, co Vás nenechá spát, o čem dumáte, o čem sníte, co Vám vrtá hlavou, čeho se bojíte, na co vzpomínáte, o čem přemýšlíte? Nenechte tyto věci jen pro sebe, zkuste rozhovor s jinými lidmi. U nás nejde jen o to, si popovídat, o to taky, ale to máte i jinde. U našeho stolu se pokusíme, spolu *filozofovat*. Nejdříve se dohodneme, jaké téma budeme diskutovat, a pak se do toho pustíme, budeme přemýšlet, rozmýšlet, promýšlet a zamýšlet se, až se nám z toho bude točit hlava, přitom nám budou podporou filozofové všech věků, abychom jí neztratili, tu hlavu. Ani byste nevěřili, jak filozofie může být osvěžující…

Hello, we are starting SU&W at Scouts Institute this Sunday! Please find us at a table across from the cafe. The event starts at 12, and the writing starts at 12:15! We will have 45 minutes of writing, followed by a 15 minute break. Then another 45 minutes of writing. Please purchase something to support the cafe and the space ☺️ Follow us on Whatsapp! https://chat.whatsapp.com/HeZDsZNFD8BKn8JohRlbkI

📚 Improve your Spanish through guided reading, vocabulary in context, and discussion-based speaking practice. In these lessons, we use books and stories to improve your Spanish in a natural, structured way. We read a level-appropriate text and focus on vocabulary, comprehension, pronunciation, and speaking. The goal is not to finish a lot of pages. The goal is to understand the text, notice useful grammar in context, and use it in speaking to build confidence. Level: A2–B1 📚 What to expect: – Small group learning – Friendly and interactive atmosphere – Guided language practice – Specialty coffee served during the event Fee: 300 CZK If you’re interested in joining or would like more information, send me a message. I look forward to reading and learning together! \- 60\-minute lesson 10 min: warm-up and review 5 min: vocabulary preview 20 min: guided reading 15 min: comprehension questions 10 min: discussion and recap

**Talk 1 – ArgoTs: TypeScript-Powered GitOps with ArgoCD** By: Jiří Soukal - Senior Cloud Engineer, from PriceFX Kubernetes is the de facto standard for cloud-native infrastructure, but managing it often means drowning in YAML. Tools like Kustomize, Helm, and ArgoCD overlays ease the pain, yet feel like patchwork rather than a fix. TypeScript-native solutions such as Pulumi or Terraform exist, but they rely on external state to diff and apply changes—adding complexity for GitOps teams. This talk introduces a new approach: using TypeScript as the source of truth for Kubernetes infrastructure without external state. By extending ArgoCD to understand TypeScript, we can dynamically generate all resources, from workloads to ArgoCD Applications and even cloud provider resources via ConfigConnector or Crossplane. **Talk 2 –** **Securing AI Deployments: From Prompts to AIBOM** By: Marek Sottl, CEO of Hackihub Are you interested in the security of AI application deployments? This packed session will focus on protecting language models and the obstacles that can arise during their deployment from a security perspective. We will explore deployment strategies in AWS and Azure environments, input validation using NLP, prompt tracing, and above all, we will emphasize the importance of AIBOM and MLBOM. **Talk 3 - GitOps, IaTS, OpenRouter and OpenClaw come to a bar** By Martin Pohl GitOps, IaTS, OpenRouter and OpenClaw come to a bar. The bartender says, “Great… who actually has production access?” GitOps says, “Not me, I only sync what’s in git.” IaTS says, “I just generate the infrastructure.” OpenRouter says, “I only route the requests.” OpenClaw says, “Relax, I already decided for everyone.” The bartender slowly reaches for the incident button: “So… which one of you started the outage?” All four reply: “According to the logs, it was a collaborative effort.” Today’s infrastructure tooling is incredibly powerful platforms like ArgoCD, TypeScript-based GitOps, and modern cloud-native stacks allow us to build and manage systems with unprecedented flexibility. But at the same time, we are introducing entirely new layers of complexity and attack surface. This talk explores the intersection of GitOps, TypeScript-driven infrastructure, and emerging AI tooling such as OpenRouter and autonomous agent-style setups like OpenClaw. As infrastructure evolves from static, declarative definitions into dynamic, runtime-generated systems, we are no longer just managing code we are operating systems that can interpret inputs, generate logic, and in some cases act autonomously. With this shift comes a new set of security challenges: prompt injection, tool misuse, model supply chain risks, and limited observability into AI-driven decision-making. The session connects these emerging risks with concepts like AIBOM and modern AI deployment security practices. Ultimately, this talk asks a critical question: are we building the future of platform engineering or creating systems we no longer fully control? **More about Talk 1:** Combining GitOps with the expressiveness of TypeScript creates infrastructure that is both declarative and dynamic, reducing toil while enabling richer abstractions, safer collaboration, and more maintainable platform engineering practices across the CNCF ekosystem. Benefits to the ecosystem \- Clarity & Maintainability: Reduces YAML complexity and templating hacks by introducing a strongly typed\, programmatic way to define infrastructure\. \- GitOps Alignment: Preserves ArgoCD’s declarative\, state\-free model while unlocking the flexibility of TypeScript\. \- Scalability: Makes it easier to manage multi\-cluster and multi\-environment setups with reusable\, composable infrastructure definitions\. \- Innovation in Platform Engineering: Demonstrates how the Kubernetes ecosystem can evolve beyond YAML\-first thinking\, inspiring new tools and workflows that balance developer experience with operational reliability\. \- Community Value: Provides a concrete path for teams frustrated with YAML sprawl to adopt a more maintainable\, type\-safe\, and future\-proof approach—without abandoning the CNCF ecosystem’s GitOps best practices\.

5:45-7:45 in Conference Room B, Library lower level. Bring your yarn projects, meet new friends. If you plan to attend, please RSVP yes. If you can’t attend, please change your RSVP to no. This helps anyone who is waitlisted and it allows me to have an accurate count of attendees as our space is quite limited. Plenty of parking in the lot, in the overflow lot across the street, and on the street. See you there!

5:45-7:45 in Conference Room B, Library lower level. Bring your yarn projects, meet new friends. If you plan to attend, please RSVP yes. If you can’t attend, please change your RSVP to no. This helps anyone who is waitlisted and it allows me to have an accurate count of attendees as our space is quite limited. Plenty of parking in the lot, in the overflow lot across the street, and on the street. See you there!

12:45-3:45 p.m. in Conference Room A, Library lower level. Bring your yarn projects, meet new friends. If you plan to attend, please RSVP yes. If you can’t attend, please change your RSVP to no. This helps anyone who is waitlisted and it allows me to have an accurate count of attendees as our space is quite limited. Plenty of parking in the lot, in the overflow lot across the street, and on the street. See you there!

12:45-3:45 p.m. in the Meeting Room, library lowest level, by the drinking fountain. Bring your yarn projects, meet new friends. If you plan to attend, please RSVP yes. If you can’t attend, please change your RSVP to no. This helps anyone who is waitlisted and it allows me to have an accurate count of attendees as our space is quite limited. Plenty of parking in the lot, in the overflow lot across the street, and on the street. See you there!

If you enjoy knitting, crocheting, working with yarn, this is the group for you. Meet new friends, bring your projects, learn from others.
We normally meet a few times a month during the week from 6-8pm. We will occasionally meet on weekends during daytime hours.

Join us for an hour of writing! We’ve discovered that it’s strikingly helpful to write with other writers. See if it’s true for you at 7:00pm on Wednesday, April 22 at Streetlight Guild. Be it a book, blog, script, essay, dissertation, resume, melody, poem or just plain work stuff, you are invited to write it with us. No one will see what you've written or give you unsolicited advice. Instead of just thinking about writing, come and get some real writing done. **SCHEDULE:** 6:45ish - Quick introductions 7:00 - Timer starts: write for 1 hour 8:00 - The End **OPTIONAL SOCIALIZING** happens before and after the writing hour. Writing is very solitary. Connecting (and sometimes even commiserating) with other writers is a cool thing. **BEING LATE IS OKAY:** just show up and get settled! If you were on time, please be willing to make room for the friendly latecomer. Happy writing & I look forward to seeing you at Streetlight Guild! **WHAT SHOULD I BRING?** Whatever you need to be able to write! You're welcome to bring earplugs/headphones if noise will bother you! **OTHER IMPORTANT DETAILS:** * **RSVP:** Please RSVP by 6:00pm the evening of the meeting. This helps me know how many to expect, and if we'll need additional space! * **COVID:** While masks are not required, please be mindful of the other writers around you and their comfort levels. * **WIFI/OUTLETS:** Outlets are limited, so please ensure your devices are charged when you come! But Streetlight Guild does have free WiFi! Yay! * **PARKING:** There is free public parking at Streetlight Guild.