Sustainable Energy

**Web3 Devs Underground - December Meetup** **About the event:** **🎙 Brought to you by [Israel Web3 Developers Underground](http://web3devs.org/) × [Arbitrum](https://arbitrum.io/) x [Rapyd](https://www.rapyd.net/company/about-rapyd/) x [Ethereum Foundation](https://ethereum.foundation/) x [Backed.Fi](https://Backed.Fi)** Powered by [Masterkey VC](http://masterkey.vc/) **Date & Time** 📅 **Wednesday, Dec 24, 2026** **Time:** 17:00 - 20:00 **Location:** Location: Gornitzky GNY Law Firm, HaHarash St 20, Floor 26, Tel Aviv-Yafo, 6761310 [https://maps.app.goo.gl/pCqtSRPjyYCNcoGk9](https://maps.app.goo.gl/pCqtSRPjyYCNcoGk9) ## Speakers: * **[Steven Goldfelder](https://www.linkedin.com/in/sgoldfed/), Co-Founder & CEO of [Offchain Labs](https://www.offchainlabs.com/), the team behind [Arbitrum](https://arbitrum.io/)** * **[Arkady Karpman](https://www.linkedin.com/in/arkady-karpman-4904406/), CTO of [Rapyd](https://www.rapyd.net/company/about-rapyd/)** * [Adam Levi](https://www.linkedin.com/in/leviadam/) \- Co\-Founder @ [Backed.Fi](https://Backed.Fi) (Acquired by Kraken) * [Tom Teman](https://www.linkedin.com/in/tom-teman-83a49b8/) \- PM @ [Ethereum Foundation](https://ethereum.foundation/) * **Moderated by [Shauli Rejwan](https://www.linkedin.com/in/saul-shauli-rejwan/), Managing Partner @ [Masterkey VC](http://masterkey.vc)** ## Agenda: * **17:00-17:30** Gathering and Mingling * **17:30-17:40** Opening Remarks * **17:40-18:00** **1:1 Best Practices For The Technical Founder** By **[Arkady Karpman](https://www.linkedin.com/in/arkady-karpman-4904406/),** CTO @ **[Rapyd](https://www.rapyd.net/company/about-rapyd/).** * 18:00-18:15 Q&A with **[Arkady](https://www.linkedin.com/in/arkady-karpman-4904406/)** * 18:15-18:30 Break * 18:30-19:15 **Panel: The Future of DeFi RWA and Entrepreneurship** * [Stephen Goldfelder](https://www.linkedin.com/in/sgoldfed/), Co-Founder & CEO of [Offchain Labs](https://www.offchainlabs.com/) * [Adam Levi](https://www.linkedin.com/in/leviadam/) \- Co\-Founder @ [Backed.Fi](https://Backed.Fi) * [Tom Teman](https://www.linkedin.com/in/tom-teman-83a49b8/) \- PM @ Ethereum Foundation * Moderated by [Shauli Rejwan](https://www.linkedin.com/in/saul-shauli-rejwan/), Managing Partner @ [Masterkey VC](http://masterkey.vc) * 19:15-19:45 Q&A and open discussion **[Masterkey Venture Capital](http://masterkey.vc/)** is a global early-stage fund investing in top-tier innovative deep tech and Web3 infrastructure projects. With a strategic presence in key crypto hubs worldwide, we are uniquely positioned to drive technological advancements within global ecosystems. Backed by nearly 50 years of combined expertise in advanced infrastructure, novel cryptography, cybersecurity, and energy solutions, our team is dedicated to empowering the entrepreneurs shaping the future of blockchain technology. **About Our Host:** [GNY (Gornitzky)](https://www.gornitzky.com/) has pioneered quality legal services since before there was a State of Israel. Taking the lead in some of the most complex transactions and cases in the country, we have excelled at thought-leadership and originality, motivating a wide range of legal precedents that have changed the face of law and the economy in Israel. **Get Involved** **Interested in speaking, sponsoring, or taking an active part in the community?** We welcome passionate individuals and organizations to contribute to our community. If you're interested in speaking at future events, sponsoring our meetups, or becoming a part of our volunteers, don't hesitate to get in touch with Amit Shilo at @Amit_Shilo (Telegram) * Community Managers: Amit Shilo, Eden Luttenberg, Alon Kivity, and Alon Ben Lavy. * Founded by Shauli Rejwan and Roy Osherove. **RSVP Now!** Secure your spot for an evening of knowledge-sharing and networking. *Limited seats are available. Register early to ensure your participation!* **Stay Connected** Follow us on social media and join our community to stay updated on upcoming events and news: * **[Website](http://web3devs.org/)** * **[Linktree](https://linktr.ee/web3devsunderground)** * **[Telegram](https://t.me/+-sEflgfrqDoyYWVk)** Stay in the loop (socials): Twitter (X) – [https://x.com/Web3_Devs](https://x.com/Web3_Devs) YouTube – [https://www.youtube.com/@israelweb3devunderground](https://www.youtube.com/@israelweb3devunderground) (Watch our content) Calendar – [https://luma.com/web3devs_underground](https://luma.com/web3devs_underground) **See You There! (Also Online)**

We’re excited about the upcoming meetup at Taboola's office! ### Schedule **17:30 - 18:00** – Mingling time! **18:15** – Spark Acceleration: To Spark and Beyond by Michael Taranov (Software Engineer @ Taboola) **18:45** – Distributed computing unpacked: by Meni Shmuali (Co-founder and CEO @ DataFlint) ### ⚠️ Important Taboola requires your **full name** for office entry. Please provide your LinkedIn profile when RSVP'ing for security reasons. Looking forward to seeing you there!

Join the Maakaf open-source community for an exciting evening of deep dives into open-source contributions, distributed storage, and career growth, hosted at the Red Hat offices! **📍 Location:** Red Hat Offices 8 HaPnina Street, Ra'anana, IL ***Free parking starts at 18:00.*** **🗓️ Date & Time:** Wednesday, December 24, 2025 18:00 - 20:45 (Israel Time) \-\-\- **📝 Agenda** 18:00 - 18:30 - **Gathering & Networking** \| Grab a snack\, meet your fellow community members\, and mingle\! \| 18:30 - 19:00 - Talk 1: **The Death of Traditional Maintainers? AI Is Rewriting Open Source** \| Speaker: **Yuval Kashtan**, Ecosystem Engineering. \- AI doesn’t sleep\, but it does open pull requests—lots of them\. This talk breaks down how maintainers can keep their projects sane in a world where bots may be your most active contributors\. Expect practical advice\, real examples\, and a few laughs about the chaos AI brings to open source\. 19:10 - 19:40 - Talk 2: **Ceph and Google Summer of Code \(GSoC\): Open Source Contribution Opportunities \|** Speaker: **Yuval Lifshitz,** Senior Technical Staff Member at IBM. \- Are you looking for the perfect way to integrate significant open\-source projects with career development? This talk will focus on the leading open-source distributed storage system, **Ceph**, a Red Hat's project! As a developer involved with Ceph, I will share the advantages and disadvantages of contributing to this complex project, whether independently or as part of the Google Summer of Code (GSoC) program. GSoC allows students and developers to participate in meaningful open-source projects, receive mentorship from experienced developers, and even get paid for their work! 19:50 - 20:20 - Talk 3: **Technical Career Insights** \| Speaker: **Omer, Recruiter at Red Hat**. \- Omer\, a recruiter from Red Hat\, will share valuable insights and tips on navigating the tech career landscape\, specializing in what open\-source companies look for in candidates\. 20:20 \- 20:45 \-Mingling & Wrap\-Up \| A final chance to chat with the speakers and community before heading home\. \|

## Details 18:00 - Mingling 🎉, SWAG 🎁, pizza 🍕, and beers 🍻 18:30 - 19:45 Lecturers 19:45 - IntelliJ Licenses + Node.TLV 20025 ticket 🎉 (more details in [https://www.nodetlv.com/)](https://www.nodetlv.com/)) ## Full Agenda From: Tal Doron : [Hebrew] **Querying for Evil: Using BigQuery to Find Threats in the SMB realm** This session dives into our practical approach for transforming massive volumes of cloud productivity logs into actionable security intelligence. We'll demonstrate how we leverage Google BigQuery as a highly-scalable data warehouse to store, process, and analyze this data at speed. You'll see how we execute complex, high-performance queries that uncover subtle anomalies, hunt for advanced threats, and provide critical detections to secure our customers. From [Anatol Zakrividoroga](https://www.linkedin.com/in/anatol-zak/overlay/about-this-profile/): [English] **Full-Stack Type Safety Without the Boilerplate: Meet tRPC** Keeping your frontend and backend in sync is hard — especially when API contracts drift, types get out of date, and your IDE stops being helpful. tRPC solves that by letting your backend define procedures that your frontend can call directly, with full TypeScript inference from end to end. In this talk, we’ll explore how tRPC eliminates unnecessary schemas and code generation while still delivering robust, type-safe communication between client and server. You’ll see how to set up a fully type-safe full-stack workflow, catch breaking changes before they hit production, and dramatically reduce the overhead of maintaining APIs. From: [‫Sagi Carmel](https://www.linkedin.com/in/sagicarmel/overlay/about-this-profile/): [Hebrew] **Promise you will learn something new about promises** Most of the time we are using Promises without reeeally understanding it's practical use v.s. what it was before. We will learn in a very interactive lesson the pure basic. Register via Luma -> [https://luma.com/b5bga495](https://luma.com/b5bga495) Kindly be informed that attendance at the meetup is on a first-come, first-served basis until capacity is reached. Although a place has been reserved for you (after click on attend button), please note that it **does not guarantee your spot.**

A fun, relaxed night out in a great restaurant 🔥 Our events bring together single people in their 20s–30s who want to meet face-to-face. Each event includes 8 people in your age group (4 males & 4 females). Forget the apps, forget the endless texting - meet people for real. How it works 1️⃣ Make sure your Meetup profile includes a clear profile photo 2️⃣ Send the host a message with your age + a short intro about yourself so we can match you with the right group 3️⃣ 72 hours before the event, the host will share the exact location

🎄 Рождественский Иерусалим: прогулка в сочельник 🌟 📅 Когда: 24 декабря, 17:00 📍 Где: Иерусалим, Яффские ворота 🎁 Возьмите с собой тёплое настроение, фотоаппарат и место для чуда в душе (и не забудьте тёплую одежду). Запись на прогулку через WhatsApp: 058-6776-375 В сочельник Иерусалим наполняется особой магией. Узкие улочки Старого города сияют огнями, воздух пахнет корицей, ладаном и свежей выпечкой, а звуки рождественских песен доносятся из старинных храмов и двориков. Мы приглашаем вас на прогулку по праздничному Иерусалиму, где каждая улица — история, каждый огонёк — обещание чуда. Вы узнаете о рождественских традициях разных конфессий, заглянете в украшенные церкви и почувствуете атмосферу ожидания Рождества — тёплого, светлого, живого. Пусть этот вечер станет напоминанием о свете, который всегда рождается внутри нас. ✨

### ✮ CAPPELLA THURSDAY MAINSTREAM ✮ הרשמה חינם וכרטיסים: https://go-out.co/event/1765921590853?ref=a3fi92ff02 חמישי קפלה 🌃 לילה של מתנות במגדל 🎁 מיינסטרים ברחבה המרכזית & היפ הופ בחדר הסודי 🎅🏻 סילבסטר — מכירה נפתחה 💋 https://www.go-out.co/event/cappellanewyearseve?ref=a3fi92ff02 לערוץ השקט שלנו 👯‍♂️ https://shorturl.at/5yQtq להזמנת שולחנות / בר 🍸 https://tinyurl.com/krpwx45f 🎧Your playlist 🎧 **MAIN STAGE** DOR GAL BEN AZULAY (Mainstream) **Secret Room** DJ WIN SHABI (Hip Hop) \~\~\~\~\~\~\~\~\~ Cappella Haarbaa 28, Tel Aviv \~\~\~\~\~\~\~\~\~ דגשים חשובים מספר המקומות מוגבל הזמנת שולחנות החל מהשעה 20:30 אנחנו ממליצים בחום להגיע עד השעה 21:15 על מנת להימנע מהמתנה בכניסה יש לצרף קישור לחשבון אינסטגרם/פייסבוק זמין - ומספר טלפון לאדם. מזמין אשר יזין את .אותם פרטים יותר מפעם אחת אוטומטית לא יאושר בקאפלה יש אפס סבלנות להטרדות מינית, המרחב בטוח וחשוב לשמור על כך

# ✮JIMMY WHO-FRIDAY-MAINSTREAM✮ הרשמה חינם וכרטיסים: https://go-out.co/event/1765929604307?ref=a3fi92ff02 🎧מיינסטרים בשדרה🎧 🎄Christmas Edition🎄 ג׳ימי שלנו לובש חג ומרים לנו כריסטמס של השמחות ברוֹטְשִׁיְלד עשרים וארבע 🏢 יוצאים לדרך כבר ב22:30 עם מיינסטרים מדוקדק, שלל של מתנות ומלאי של אהבה אל תוך הלילה בקלאב 🪩 על המחטים החל מ 22:30 🕥 BARAK YAEL AVSHATS 📀 \~\~\~ מספר המקומות מוגבל הזמנת שולחנות החל מהשעה 22:30 אנחנו ממליצים בחום להגיע עד השעה 23:00 על מנת להימנע מהמתנה בכניסה יש לצרף קישור לחשבון אינסטגרם/פייסבוק זמין - ומספר טלפון לאדם. מזמין אשר יזין את .אותם פרטים יותר מפעם אחת אוטומטית לא יאושר בג'ימי הו יש אפס סבלנות להטרדות מינית, המרחב בטוח וחשוב לשמור על כך \~\~\~ סילבסטר שלנו — מכירה נפתחה 💋 https://www.go-out.co/event/cappellanewyearseve?ref=a3fi92ff02 \~\~\~ לערוץ השקט שלנו 👯‍♂️ https://shorturl.at/5yQtq \~\~\~ להזמנת שולחנות / בר 🍸 https://tinyurl.com/krpwx45f \~\~\~ נתראה בשדרה 🛹

לרגל חודש האזרח הוותיק מוזמנים/ות לסדנת היכרות עם ChatGPT ללמוד, לשחק, ליצור בסדנה נכיר את היסודות של העבודה עם ChatGPT: איך להעזר בו לשימושים יצירתיים ואיך לנסח פרומפטים מוצלחים. בהמשך, ניצור סרטון דמות מדברת מתמונה עם הכלים שלמדנו. מתנה - חוברת פרומפטים דיגיטלית ליצירת תמונות מדהימות הסדנה מיועדת לאזרחים/יות ותיקים/ות. עלות: 120 ש"ח (לתושבי יהוד-מונוסון: 100 ש"ח) שימו לב: לא מספיק להרשם במיטאפ יש להרשם גם בקישור הבא , שם תמצאו גם פרטים נוספים https://link.makelab.org.il/intro-2-chatgpt

מוזמנים/ות לסדנת נגרות - אדנית עץ מעוצבת במפגש אחד. במהלך הסדנה נתנסה במיומנויות נגרות בסיסיות: ניסור, שיוף, קדיחה והברגה ונתנסה בעבודה עם עץ, כל הדרך מחומר הגלם ועד לתוצר המוגמר. למבוגרים/ות (16+). עלות: 250 ש”ח למשתתף/ת מחיר לתושבי יהוד – 200 ש”ח למשתתף/ת שימו לב: לא מספיק להרשם במיטאפ יש להרשם גם בקישור הבא , שם תמצאו גם פרטים נוספים https://link.makelab.org.il/planter-carpentry

**TAMI Sonic (Music Night)** Join our bi-weekly informal meetups devoted to playing and experimenting with sound. ========== TAMI wiki: [https://telavivmakers.org](https://telavivmakers.org) TAMI main Telegram channel: [https://t.me/+0t5M0-jK9iIwZmM8](https://t.me/+0t5M0-jK9iIwZmM8)

בסדנה נכיר את העקרונות הבסיסיים של תחום הריתוך, נתנסה בעבודה עם כלי העבודה השונים, נחשף לסוגי הריתוך השונים ותצברו ידע שיסייע לכם להבין את התהליך ואת טכניקות העבודה הנדרשות. עלות: ₪190 הנחה לתושבי יהוד שימו לב: לא מספיק להרשם פה, יש להרשם גם בקישור הבא [https://www.makelab.org.il/registration/welding](https://www.makelab.org.il/registration/welding)

Wild Ones: Annual Native Seed Swap January 10, 2026 @ 10:00 am - 11:00 am Join Wild Ones Columbus for their annual native seeds swap. If you have native seeds to share, please label them with the Latin name and common name. The seeds don’t need to be removed from the seed head if you aren’t sure how to do it, but remove as much stem as possible. Bringing seeds is not required. Bring bags or envelopes to store seeds. Inniswood Metro Gardens 940 S. Hempstead Rd. Westerville, OH 43081 Phone (614)895-6216 This event will be held in the Greenhouse/Multipurpose Building located near the east end of the parking lot. Click here to see the Inniswood map. If you have native seeds to share, label each species with this information: * Botanical Name * Common Name Species we will accept: * Species native to our ecoregion (8.2.4) - Best * Species native to Ohio and surrounding states - Good * Straight species only - no cultivars. The seeds don’t need to be removed from the seed head if you aren’t sure how to do it, but don’t leave much stem on the seed heads. Please email the list of species to Mary May so we can prepare information for attendees. You can bring the seeds on the day of the swap, or we can arrange to have them picked up beforehand - just let her know in the email. If you don’t have any seeds to bring, no worries. If you are new to native plants or didn't have time to collect seeds, there are ALWAYS plenty from those that do bring them! We love to see "newbies" at our seed exchange! Also, remember to bring something to put seeds in such as envelopes, paper bags or containers.

# Save the date! FUTURE MEETINGS! [](https://www.meetup.com/funandfood/events/299189211//attendees/) [Hosted By](https://www.meetup.com/funandfood/events/299189211//attendees/) [Dara T.](https://www.meetup.com/funandfood/events/299189211//attendees/) This listing is information only. Each event will be scheduled individually. ## DO NOT TRY TO SIGN UP ON THIS LIST! January 12 , 2025 - Greek epiphany: Blessing of the Waters, Mad Greek Restaurant February 9, 2025 - Valentine's Day in Germany, Hillgarten Beer Garden, Hilliard March 15, 2025, Indian Holi Festival, Aab India Restaurant April 6, 2025 - Chinese: Hanchi / Qingming Festival May 4, 2025 - Japanese Golden Week, Akai Hana Japanese Restaurant June 8, 2025- Hawaiian King Kamehameha Day, Ohana Grill Hawaiian Restaurant July 5, 2025, 60's Nostalgia: Dance to the Moonbats, JT's Restaurant (Fabulous pub food and great beer, as well as dancing music). They play British Invasion music. Dining Out Fun Times Make New Friends ## Photos (1) [See all](https://www.meetup.com/funandfood/photos/34336422) Add photos

Join Sacred Sound Alchemy Columbus for a transformative Sound Bath experience that will take you on a journey of self-discovery and healing. Immerse yourself in the powerful vibrations of various sound instruments like crystal singing bowls and rain drums, carefully orchestrated to balance your chakras and uplift your spirit. The soothing sounds will help you release negative energy, reduce stress, and promote deep relaxation. This event is perfect for those seeking a moment of tranquility and a chance to connect with their inner selves. Whether you are new to sound healing or a seasoned practitioner, you will benefit from the harmonious frequencies that will resonate with your body and soul. Come and allow yourself to be enveloped in a wave of healing energy, leaving you refreshed, rejuvenated, and ready for life's next chapter. Please bring something comfortable to lay on like a yoga mat. Being a pillow for your head or for under your knees and a blanket to cover over yourou. The library can get cold. Bring some water to help flush your body for after the session.

Join Sacred Sound Alchemy Columbus for a transformative Sound Bath experience that will take you on a journey of self-discovery and healing. Immerse yourself in the powerful vibrations of various sound instruments like crystal singing bowls and rain drums, carefully orchestrated to balance your chakras and uplift your spirit. The soothing sounds will help you release negative energy, reduce stress, and promote deep relaxation. This event is perfect for those seeking a moment of tranquility and a chance to connect with their inner selves. Whether you are new to sound healing or a seasoned practitioner, you will benefit from the harmonious frequencies that will resonate with your body and soul. Come and allow yourself to be enveloped in a wave of healing energy, leaving you refreshed, rejuvenated, and ready for life's next chapter.y

First Sundays are free admission at Franklin Park Conservatory. Sunday, January 4th, is also the last day The Palm House will be open before renovations begin. Let’s meet, enjoy a respite from January weather, and wander the gardens. Free neanthe bella palms are available to guests, beginning at 10am, while supplies last. Afterwards, we can visit the nearby East Market (212 Kelton Avenue).