.NET

HunBAN Startup Arena is a monthly event series by the Hungarian Business Angel Network (HunBAN), created to connect early-stage founders with angel investors and the wider startup ecosystem. TICKETS AVAILABLE: https://startuparena202602.ticketninja.io/

Indítsd 2026-ot argentin tangóval! Nincs szükséged semmilyen előzetes tánctudásra, és egyedül vagy párban is jelentkezhetsz! Várunk szeretettel minden tangózni vágyót! Oktató: Szeghalmi Endre Kezdés: 2026. jan. 12., hétfő 20:00 – 21:00. Az órák minden hétfőn ugyanebben az időpontban folytatódnak. Helyszín: Roxy Stúdió, Tátra u. 4. Jelentkezés és további infók: A [www.tangolibre.hu/tango-tanfolyam/](http://www.tangolibre.hu/tango-tanfolyam/?fbclid=IwZXh0bgNhZW0CMTAAYnJpZBExbDFsUmtNd2dIQVpmSHY3TXNydGMGYXBwX2lkEDIyMjAzOTE3ODgyMDA4OTIAAR50fTXksGSsXPYTo3IYigrZIXxtxdytBSer6v-jm9Y7HrcgPGLXn9R-dfaPCg_aem_0misiL79POQIY53C46m1Mw) oldalon találsz minden részletet, és itt tudsz regisztrálni. ✦ ✦ ✦ ✦ ✦ ✦ ✦ ✦ Start 2026 with Argentine tango! No prior dance experience is required, and you can sign up either alone or with a partner. We warmly welcome everyone who would like to dance tango! Instructor: Endre Szeghalmi Start: Monday, January 12, 2026, 8:00–9:00 PM Classes will continue every Monday at the same time. Venue: Roxy Studio, Tátra u. 4. Registration and more information: [www.tangolibre.hu/en/tango-classes-for-totally-beginners/](http://www.tangolibre.hu/en/tango-classes-for-totally-beginners/?fbclid=IwZXh0bgNhZW0CMTAAYnJpZBExbDFsUmtNd2dIQVpmSHY3TXNydGMGYXBwX2lkEDIyMjAzOTE3ODgyMDA4OTIAAR50fTXksGSsXPYTo3IYigrZIXxtxdytBSer6v-jm9Y7HrcgPGLXn9R-dfaPCg_aem_0misiL79POQIY53C46m1Mw)

Enjoy your time learning and practicing public speaking with Budapest Toastmasters! There is no need to speak or any previous experience in Public Speaking. --- 👉Keycode: 12, 3rd Floor. Please arrive by 6:20 PM, the meeting starts at 6:30 PM👉No registration or dress code is needed, the event is FREE.👉NOTE: We will have signs in the place so you can locate easily the Toastmasters Meeting room. --- Toastmasters International is a world leader in communication and leadership development. Our membership is 313,000 strong. Members improve their speaking and leadership skills by attending one of the 14,650 clubs in 126 countries that make up our global network of meeting locations. The world needs leaders. Leaders head families, coach teams, run businesses, and mentor others. These leaders must not only accomplish but must also communicate. By regularly giving speeches, gaining feedback, leading teams, and guiding others to achieve their goals in a supportive atmosphere, leaders emerge from the Toastmasters program. Every Toastmaster's journey begins with a single speech. During their journey, they learn to tell their stories. They listen and answer. They plan and lead. They give feedback—and accept it. Through our community of learners, they find their path to leadership.

Come and play boardgames with others in English! This event is hosted by the [Játszóház projekt](https://www.facebook.com/jatszohazprojekt). This group organizes game nights, they provide the games and explain the rules if you need it. They have a huge collection of board games, check it out [here](https://boardgamegeek.com/collection/user/jatszohazprojekt?own=1&subtype=boardgame&ff=1). If you wish to play with a specific game, they will ask what games to bring, usually on the day of the event in a facebook post. Check out the [event on facebook](https://www.facebook.com/events/1395929674975536) for more information. We usually split up into smaller groups based on games, and switch as the night goes on, so you can arrive late. You can bring your own game or choose one from the pile! ***Important*** **This event is not free!** You will have to buy a wristband at the entrace for 1000 HUF (500 HUF for students). You can pay with cash or you can buy your ticket [here](https://www.tixa.hu/jhz260223). You can buy drinks and food at the bar, please don't bring your own — — — After you bought your ticket head upstairs where the bistro is, we will probably be at the biggest table, near the bar. Let me know if you have any questions, you can contact me or ask in the comment section. We also have a WhatsApp group chat, feel free to join [here](https://chat.whatsapp.com/JThEZv724MJ3hvnwBpfJA7)

El objetivo de este encuentro es romper el hielo, hablar de las historias que nos gusta escribir, de por qué escribimos, de los libros que nos gusta leer, de qué dificultades encontramos al enfrentarnos al folio en blanco y de qué esperamos del grupo. En definitiva, se trata de conocernos como personas para entendernos como escritores. No importa si has escrito diez novelas, cuatro cuentos o el precioso título de un poema sin versos. Aquí todo aspirante a juntaletras es bienvenido.

**Bouldering & Rope Climbing \| Small Groups \| Friendly Atmosphere** Want to try climbing or get more confident on the wall? Join our **beginner-friendly climbing sessions** for adults and kids (9+). No prior experience needed — just curiosity and willingness to move 💪 **Languages:** English / Hungarian / Russian *** ### 🔹 Monday — Bouldering (Low Wall) Perfect for beginners: low wall, soft mats, focus on strength, technique and movement. 🕔 **17:00–18:40** 📍 Mountex, 1134 Budapest, Váci út 19 📌 **Pre-registration required** **Training:** 4000 HUF / person **Gym entry (paid separately):** * Adults: 3500 HUF * Children under 14: 2290 HUF Equipment rental available on site. *** ### 🔹 Thursday — Rope Climbing (15 m Wall) Learn rope climbing and belaying on a **full-height wall** with an instructor. 🕔 **17:00–19:00** 📍 BigWall, 1047 Budapest, Károlyi István u. 10 📌 **Pre-registration required** **Training:** 5000 HUF / person **Gym entry (paid separately):** * Adults: 3990 HUF * Students (under 26): 2990 HUF * Children under 14: 1990 HUF All necessary equipment can be rented at the gym. *** ### ⭐ Why join? * Beginner-friendly, supportive coaching * Small groups and personal attention * Adults & kids train together * Safe environment and clear instruction * Great way to get stronger and meet active people * In the warm season, we **occasionally move from the gym to real rock outdoors** *** ### 💳 Regular climbers If you attend **both days regularly**, you can buy a pass: **29,000 HUF — 8 consecutive sessions** *** 👉 **Sign up in advance — spots are limited.** Feel free to message me if you have questions!

💜 Csak nőknek szóló PyLadies esemény! 💜 Gondoltál már arra, hogy miért kellene újra és újra leírnod ugyanazt a kódot, ha egy feladatot többször is el akarsz végezni? A Python függvények pont ebban segítenek: egyszer megírod a kódot, elnevezed, és utána annyiszor használod, ahányszor csak szeretnéd. Ezen az előadáson közérthető nyelven, lépésről lépésre fedezzük fel a függvények alapjait, kezdőknek és újrakezdőknek is ideális módon: • Mi az a függvény? Egy „miniprogram”, ami egy meghatározott feladatot végez el – megnézzük, miért ez a Python egyik legfontosabb építőköve. • Hogyan hozhatsz létre egyet? A def kulcsszó használata, beszédes függvénynevek, és az első saját függvények megírása. • Paraméterek csínja-bínja: Megismerjük a pozíciós és kulcsszavas argumentumokat, az iterálható objektumok csomagolását (unpacking), valamint azt is, hogyan használhatjuk okosan a \*args és \*\*kwargs lehetőségeit. Szó lesz az alapértelmezett paraméterekről és arról is, mire érdemes figyelni velük kapcsolatban. • Változók láthatósága: Amikor a Python egy változó értékét keresi, először a lokális névtérben vizsgálódik. Ha ott nem találja, továbbmegy a befoglaló függvény névterébe, majd a globális névtérbe, végül pedig a beépített névtérbe. Ezt a folyamatot a függvények működésén keresztül is részletesen áttekintjük, sok gyakorlati példával. • Egy kis „szuperképesség” a végére: Rövid betekintést adunk a dekorátorok világába is. Bár haladóbb téma, megmutatjuk, hogyan tehetik még okosabbá és testreszabhatóbbá a függvényeinket anélkül, hogy bonyolítanánk a kódot. Ha szeretnéd jobban megérteni, hogyan szervezd tisztábban és hatékonyabban a Python kódodat, ez az alkalom neked szól. Várunk minden érdeklődőt – akár most ismerkedsz a Pythonnal, akár már használod, de szeretnéd mélyebben megérteni a működését. 🐍✨ 👨‍💻 Előadó: Péter Fülöp 🗓️ Programterv • 17:30 – 18:00 Megérkezés, setup • 18:00 – 19:00 Előadás I. • 19:00 – 19:20 Szendvicsek & frissítők • 19:20 – 20:10 Előadás II. • 20:10 – 21:00 Networking (A programterv változásának jogát fenntartjuk.) 💻 Mivel készülj? Workshop jellegű alkalom lesz, így hasznos, ha hozol magaddal egy programozásra alkalmas számítógépet. Jó, ha előre megismerkedsz egy Python Notebookkal, például a Google Colab-bal (ehhez egy Google-fiók szükséges). Ha kell bármi segítség, gyere kicsit hamarabb és segítünk! 💜 Kit várunk? Olyan **lányokat/nőket**, akik most ismerkednek a Python nyelvvel, vagy szeretnék meglévő tudásukat bővíteni vagy felfrissíteni. 📍 Helyszín Balance Irodaház – 7. emelet Dél (Lifttől balra) Cím: 1139 Budapest, Váci út 99 ‼️ Következő alkalmunk nem a megszokott helyszínen lesz, hanem a főépületben, és kisebb térben, így a létszám limitált. Megközelítés a Váci út felől. 🌍 Nyelv Az esemény nyelve: magyar (és Python) 🤝 Szponzor HCL Technologies Starschema Kft. Ha bármi kérdésed van, csatlakoznál szervezői csapatunkhoz, vagy akár te is szívesen előadnál valamilyen témában, írj nekünk bátran! Nagyon várjuk, hogy újra találkozhassunk! Üdvözlettel, a PyLadies Budapest szervezői 👩‍💻

**IMPORTANT UPDATE! THE EVENT IS FULL, WE HAVE CLOSED THE REGISTRATION.** Free event, [registration](https://datapao.com/databricks-hungary-meetup/) is required. **SUMMARY** Join DATAPAO for the first **Databricks Hungary Meetup** in 2026\*\*.\*\* Join us and our exciting guests from Databricks for **talks,** **product updates** and news and of course, networking with fellow data professionals. This event is aimed data engineers, analysts, scientists and people passionate about data and AI. It gives you the perfect chance to catch up with the data community while enjoying some snacks and drinks in a trendy setting built for innovation. Don’t miss this opportunity to connect, learn, and be inspired! **LOCATION** Mastercard Office Budapest - Váci út 26., Budapest, 1132 **AGENDA (subject to change):** Please note that the timings below refer to CEST (Central European Summer Time). Date: February 26, 2026 Time: 17:30 - 18:00 Welcome and networking 18:00 - 19:00 Talks and discussion on the latest and greatest around Databricks 19:00 - 20:00 Networking **WHAT TO EXPECT?** * Soft drinks and snacks * Meaningful conversations with the data community * Insights from **Felix Mutzl** (Data & AI Strategist at Databricks) **and Gabor Ratky** (Engineering Manager at Databricks) * Networking opportunity **LANGUAGE** English/Hungarian **EVENT FEE** Free **REGISTRATION** To save your seat, please make sure to register for the event here: https://datapao.com/databricks-hungary-meetup/ **ABOUT [DATABRICKS COMMUNITY HUNGARY](https://www.meetup.com/databricks-community-hungary/?eventOrigin=onboarding)** This group is dedicated to bringing together data enthusiasts, analysts, and engineers interested in learning and sharing knowledge about Databricks and Apache Spark. Whether you are a beginner looking to delve into the world of data & AI or a seasoned professional looking to take your skills to the next level, our meetups offer a platform to connect, collaborate, and learn from each other. Join us for discussions, workshops, and networking events designed to promote growth and exploration in the field of data intelligence. Let’s ignite our passion for data together! **ABOUT [DATAPAO](https://datapao.com/)** We are a data engineering and data science consulting firm and a long-time Databricks partner. We cover the entire data journey including strategy, implementation, training and innovation. **Join us at the Mastercard Office in Budapest on the 26th of February**! Hope to meet you there. *The DATAPAO team*

Középhaladó argentin tangó óra heti rendszerességgel januártól! Várunk szeretettel! **Időpont**: Szerda, 19.00 - 20.15 (első alkalom 2026-ban: **január 6.)** **Helyszín**: Shift Stúdió, Andrássy út 35., 2. em., 12-es kapucsengő **Oktatók** Serbán Andrea és Szeghalmi Endre [További részletek és órarend](www.tangolibre.hu) ✦✦✦ Intermediate Argentine tango class held on a **weekly basis**. **🕒 Time** Wednesday, 7:00–8:15 PM **📍 Location** Shift Studio, Andrássy út 35., 2nd floor **Teachers** Andrea Serban & Endre Szeghalmi Prices: [https://tangolibre.hu/en/prices/](https://tangolibre.hu/en/prices/)

Csatlakozz a KEZDŐ 2 kurzusunkhoz! **Időpont:** Keddenként 20:00–21:00 (első alkalom 2026-ban: **január 6.)** **Helyszín**: Roxy Táncstúdió Tátra utca 4., 1136 Budapest [Teljes órarendünk](https://tangolibre.hu/orarend/) **Tanárok**: Szeghalmi Endre és Serbán Andrea ✦✦✦ Join our **Beginner 2 Argentine Tango course**! This class is for dancers who already know the basics and would like to continue developing their technique, connection, and enjoyment of tango. **🕒 Time** Tuesdays 8:00–9:00 PM First class in 2026: **January 6** **📍 Location** Roxy Dance Studio Tátra utca 4., 1136 Budapest **Teachers** Endre Szeghalmi & Andrea Serbán **Prices:**[ https://tangolibre.hu/en/prices/](https://tangolibre.hu/en/prices/)

Google Research published a paper at NeurIPS '25 : ["Nested Learning: The Illusion of Deep Learning Architectures"](https://abehrouz.github.io/files/NL.pdf) It is a new approach to look at machine learning problems: architecture & optimization algorithms together In NL, training models is not treated as one opaque, atomic process. But as **a** **system of interconnected, multi-level learning problems** that are **optimized in parallel**. The goal is to solve one of the core challenges of modern LLMs: **continual learning** (the ability for a model to acquire new skills over time without forgetting old ones.) Authors argue: the model's **architecture and the optimization algorithm are fundamentally the same concepts;** they are just different "levels" of optimization, each with its own internal flow of information and update rate We'll walk through: \- how the paper unifies model architecture and optimizers \- architectural decomposition of a classical learning problem solved in the framework of Nested Learning \- how optimizer algorithms fit into the NL framework \(backrpop as associative memory\) \- the concept of continuum\, multi\-timescale memory \- Hope \- an architectural backbone of NL === ENTRY DETAILS === \- QR code with entry information will beavailable soon\, in the "Photos" section of this event page\. \- Gate closes at 18:15 \- no late entries\.

Csatlakozz a Kezdő 1 kurzusunkhoz! Ez a kurzus a **2025 szeptemberében indult Teljesen kezdő csoportunk folytatása**, de új érdeklődők is csatlakozhatnak, ha már van minimális tapasztalatuk argentin tangóban. **Időpont:** Keddenként 19:00–20:00 (első alkalom 2026-ban: január 6.) **Helyszín:** Roxy Táncstúdió, Tátra utca 4., 1136 Budapest **Tanárok:** Szeghalmi Endre és Serbán Andrea Teljes órarendünk: [https://tangolibre.hu/orarend/](https://tangolibre.hu/orarend/?fbclid=IwZXh0bgNhZW0CMTAAYnJpZBEwaDNKZFpsQVh2dUpJMklKd3NydGMGYXBwX2lkEDIyMjAzOTE3ODgyMDA4OTIAAR7-aVO75w-5o1MEitQYD_hyAji9mGat21L3FYSxxPdYQTAUrjN9qopadYwkuw_aem_cRLCRnGqUCcsUeCJj_XpyA) Árak: [https://tangolibre.hu/arak/](https://tangolibre.hu/arak/) \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- **Beginner 1 Argentine Tango Course – continuation** This course is the continuation of our Total Beginner group started in September 2025. New participants are also welcome if you already have some basic experience in Argentine tango. **Time:** Tuesdays 7:00–8:00 PM (First class in 2026: **January 6)** **📍 Location:** Roxy Dance Studio, Tátra utca 4., 1136 Budapest **Teachers:** Endre Szeghalmi & Andrea Serbán Prices: [https://tangolibre.hu/en/prices/](https://tangolibre.hu/en/prices/) ***

Haladó argentin tangó óra heti rendszerességgel januártól! Várunk szeretettel! **Időpont**: Szerda, 20:15 - 21:30 (első alkalom 2026-ban: **január 6.)** **Helyszín**: Shift Stúdió, Andrássy út 35., 2. em., 12-es kapucsengő **Oktatók** Serbán Andrea és Szeghalmi Endre Órarend: [https://tangolibre.hu/orarend/](https://tangolibre.hu/orarend/) ✦✦✦ Advanced Argentine tango class held on a **weekly basis**. **🕒 Time** Wednesday, 8:15–9:30 PM **📍 Location** Shift Studio, Andrássy út 35., 2nd floor **Teachers** Andrea Serban & Endre Szeghalmi Prices: [https://tangolibre.hu/en/prices/](https://tangolibre.hu/en/prices/)

**Important time note:** Please plan on arriving between 5:30 and 6:00 as the elevators lock after 6 and you'll need to message us and we'll need to come get you. The building address is 4450 Bridge Park The entrance is 6620 Mooney St, Suite 400 You will need to scan your ID at the door to get a visitor badge. **Abstract** *Spec-Driven Development with GitHub Spec-Kit: From Intent to Implementation* Spec-driven development flips the traditional workflow on its head: instead of code being the source of truth, the specification becomes the backbone of design, collaboration, and delivery. In this session, we’ll explore how GitHub Spec-Kit enables teams to treat specifications as first-class artifacts—living documents that drive architecture, implementation, and verification. You’ll learn how Spec-Kit helps teams clearly express intent using structured, version-controlled specs that live alongside code. We’ll walk through a practical workflow that starts with defining system behavior and constraints, then progressively refines those specs into testable, automatable outcomes. Along the way, we’ll show how specs can reduce ambiguity, improve cross-functional collaboration, and make design decisions explicit before a single line of production code is written. This talk will cover: --What spec-driven development is (and what it isn’t) --How GitHub Spec-Kit fits into modern developer workflows --Using specs to align product, engineering, and AI-assisted development --Real-world examples of turning specs into implementations with confidence Whether you’re building greenfield systems, integrating AI into your stack, or trying to reduce costly rework, spec-driven development offers a scalable way to move faster without sacrificing clarity. Attendees will leave with concrete patterns and a clear mental model for adopting GitHub Spec-Kit in their own projects. **YouTube Link** TBA

* Who Can Attend \* The Central Ohio .Net Developers Group meetings are free and open to the public! All developers; professional, student, and hobbyist are welcome and encouraged to attend. * When we meet \* The Central Ohio .Net Developers Group meets on the 4th Thursday of every month. * Where we meet \* Please check our Meetup group link below for the latest location details! * Join our Meetup Group \* https://www.meetup.com/Central-Ohio-NET-Developers-Group-CONDG/

Bring your work or your hobby, hang out, and code with us. Follow @buckeyecocoa for more information.

**Presenter:** Auri Rahimzadeh, Principal Software Architect, Momentum3 **Time:** Pizza at 6:00, Presentation Starts at 6:30pm Eastern **Location:** Theoris, 9000 Keystone Crossing, Suite 230, Indianapolis .NET 10 is here alongside a practically rewritten Visual Studio 2026. Learn about the new C# 14 features, VS2026 niceties, and more! Looking forward to seeing you there!

Come out to Improving for our monthly iOS and Mac meetings. This Month's Presentation: Nothing yet. (You should volunteer). What is Cocoaheads (http://cocoaheads.org/)? CocoaHeads is a group devoted to discussion of Apple Computer's Cocoa Framework for programming on MacOS X and iOS (including the iPhone, iPad and Apple Watch). During monthly meetings, members present on their projects and offer tutorials on various programming topics. What is BuckeyeCocoa (http://buckeyecocoa.org/)? BuckeyeCocoa is a group of Objective-C/Swift developers/enthusiasts. We host monthly Cocoaheads and near-weekly NSCoder meetings in Columbus, Ohio. The meetings are free to attend. Presentations! Presenters welcome! We are always in need of people willing to present material. Any Swift and/or Objective-C related topic is welcome. Times can be 5 minutes (i.e. lightning talks) to a maximum of 2 hours. Interested? Contact info is on the BuckeyeCocoa website. To volunteer for a presentation contact us at @BuckeyeCocoa on Twitter. Follow us on Twitter! @BuckeyeCocoa (https://twitter.com/#!/Buckeyecocoa/) For more information: http://buckeyecocoa.org/

Meeting @ Improving's office in Downtown Columbus, near Cosi. Parking is paid, food & drink are free! This time we're hanging out after the long winter break. We are going to look at a group-member's project used to help learn the fundamentals of Go, and if time allows, we can take a look at how we like to build Go projects using AI.