Software Engineering

Defenses 🚨 ​🎙️ Hosted by: Web3 Developers Underground × Hacken ⚡ Powered by: Masterkey VC ​AI is entering DeFi, and so are completely new attack vectors. Are your smart contracts secure, or are you just waiting to get rekt? 💥 ​Join us for an exclusive, no-holds-barred look into the trenches of Web3 security. We are bringing in the heavy hitters from Hacken to break down exactly how modern exploits happen and how to build un-hackable protocols. ​📅 The Details ​Date: Wednesday, April 29th ​Time: 10:00 EDT | 16:00 CET | 17:00 Israel Time ​Where: Streaming Live on X (Twitter), YouTube, and LinkedIn. ​🎤 Meet the Experts ​Dyma Budorin | Executive Chairman & Founder @ Hacken (Catch him on X right here) ​Stephen Ajayi | DApp Technical Lead @ Hacken ​👾 The Workshop: Prompt Injection Meets DeFi ​Led by Stephen Ajayi As AI agents increasingly interact with DeFi protocols on-chain, a terrifying new class of vulnerabilities is waking up. This workshop goes hands-on into how prompt injection attacks can compromise agent toolchains—and exactly how to build defenses that hold up under adversarial conditions. ​🔍 What Else We’re Tearing Down: ​The Audit Process: The methodology, scope, tooling, and what professional auditors actually hunt for in your code. ​💥 Exploit Anatomy: Real-world breakdowns of high-profile hacks (reentrancy, oracle manipulation, access control, and logic bugs). ​🧠 The Attacker Mindset: How threat actors spot your vulnerabilities before your defenders catch them. ​🛡️ Defensive Architecture: The exact coding patterns and practices that separate secure protocols from compromised ones. ​🏗️ The Security Stack: Where Web3 security infrastructure stands today—and the critical gaps you need to watch out for. ​💡 Backed by Masterkey Venture Capital ​A massive shoutout to our sponsor, Masterkey VC—a global early-stage fund focused on deep tech and Web3 infrastructure. With over five decades of combined experience in cryptography, infrastructure, and cybersecurity, Masterkey backs the visionary founders building the decentralized technologies of tomorrow. ​🌐 Stay Connected with the Underground ​Don't miss a beat. Join the community and check out our other events! ​📅 Full Event [Calendar](https://luma.com/web3devs_underground) 🔗 Our [Linktree](https://linktr.ee/web3devsunderground?utm_source=linktree_profile_share&ltsid=fd35c05f-aad4-4497-8a9e-c089f3b7c029)

***\*\*To register for the meetup, please register via Luma using the link below\*\**** Register via Luma -> [https://luma.com/sszyn5y0](https://luma.com/sszyn5y0) # ​**18:00 - Mingling 🎉, pizza 🍕, and beers 🍻18:30 - lectures**20:00 - Go Home!------------------------------------------------------------ ​ **Gal Lerman \| Tech Lead \| Papaya** **One Process to Rule Them All: How We Killed Our Microservices — for Testing, Dev Envs, and Local Development** ​Microservices are great in production. Everywhere else, they're expensive, slow, and painful. We'll show how we collapsed our entire service fleet into a single process — first to replace our mock-heavy tests with fast, real E2E tests that boot every service in-process; then to slash Kubernetes dev environment costs by replacing a pod-per-service with a single pod; and finally to enable fully local development with instant feedback, zero deploy cycles, and real debugging. Same architecture, three wins. ​ **Stav Levinger \| Senior Full Stack Engineer \| Riskified** ​Unblocking the Node.js Event Loop: Real-World Troubleshooting In a NodeJS Consumer ​What happens when a perfectly healthy and robust Node.js service suddenly stops responding, fails its health checks and gets killed by Kubernetes? ​In this talk, I’ll share a real production incident from a high-throughput, Kafka-driven system, where a single consumer began collapsing under unusually large datasets. ​What initially looked like a routine performance issue quickly turned into a deeper investigation: growing lag, stalled processing, misleading signals, and a bottleneck hiding far from where we first looked. ​We’ll walk through the debugging journey step by step, examine practical profiling techniques to narrow down the search, and ultimately uncover the real root cause. ​**Or Kaplan \| Director of Engineering \| Remitly Israel** ​Implementing Distributed locking algorithms in Node.js ​Description ​Protecting shared sensitive shared resources from race conditions is hard enough when running in a single process. Let's make it harder: how do you do it in a distributed system? Scale it up and run it in a production system that serves millions of transactions. See where we’re going here? ​In this talk, I will take you along our journey of implementing distributed locks in Node.js, how they broke, and how we evolved our algorithm over time to support thousands of requests per second in a mission-critical financial system. We will discuss different ways to implement distributed locking, using different tools and approaches. Learn how to improve performance to support more than 10,000 transactions per second which are all trying to access the same resource while running workflows on multiple data centers and how to verify it doesn’t break. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- ​​ 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.**

Signing up is via [LUMA](https://luma.com/93cxbnjf). https://luma.com/jtpiaz48

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: 240 ש"ח למבוגר/ת. לתושבי יהוד-מונוסון: 190 ש"ח למבוגר/ת. 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)

במהלך המפגש כל אחת ואחד מהחברים והאורחים מציגים את עצמם , לפני אחרי מתקיים מינגלינג להכרות ובסיום ארוחת בוקר בכל מפגש יש הרצאה של 10 דקות בתחום מקצועי אחר המפגש מתקיים בבית קפה צבעים בפארק בכבר סבא עלות 60 ש"ח אפשר לפנות אלי יורם במייל yoramze@gmail.com 0547333081 בקבוצה 23 חברים קבעים שמגיעים לכל מפגש מתחומים שונים: עורכי דין, תחום הבניה והעיצוב , ייעוץ עסקי, שירותים לבית,ראיית חשבון , ביטוחת משכנאות , שייוק ומכירות , משרד חקירות , סון עריכת פטנטים , ארגון טוילוים לחו"ל ,נדל"ן ,מחשבים לרשמת חברי הקבוצה https://bni.co.il/%D7%A9%D7%A8%D7%95%D7%9F-%D7%A8%D7%95%D7%9D-%D7%94%D7%A9%D7%A8%D7%95%D7%9F/iw/memberlist

The TLV PUG is back! Join us for an afternoon of talks, food, drinks, and good company at Microsoft Reactor Tel Aviv on Level 50 with those incredible skyline views. This time we've got two great talks lined up. Oh, and there will be swag. You're welcome. **Talks:** **From Zero to AI Agent: Building with Microsoft Foundry Agent Service** *[Engin Diri](https://www.linkedin.com/in/engin-diri/) \- Senior Solutions Architect\, Pulumi* AI Agents are everywhere right now, but how do you actually build and deploy one without losing your mind? In this talk, Engin will walk through how to use Microsoft Foundry Agent Service together with the Microsoft Agent Framework and Pulumi to spin up, configure, and manage AI agents, all as code. We'll go from an empty project to a working agent, covering the gotchas and the good parts along the way. **OpenClaw Bots Done Right: No Security Nightmares Included** [Dor Serero](https://www.linkedin.com/in/dorser/) \- Principal Architect\, Microsoft So you want to run an OpenClaw bot, or any agent for that matter. Cool. But have you thought about what happens when things go sideways security-wise? In this session, Dor will share real-world lessons on running OpenClaw bots without the kind of setup that keeps you up at 3 AM wondering if something just went horribly wrong. We'll cover common pitfalls, hardening tips, and practical patterns to keep your bot humming without opening the door to trouble. **Schedule:** * 5:00 PM — Doors open, food, drinks & networking * 5:30 PM — From Zero to AI Agent: Building with Microsoft Foundry Agent Service (Engin Diri) * 5:55 PM — OpenClaw Bots Done Right: No Security Nightmares Included (Dor Serero) * 6:20 PM — Networking, food & drinks * 7:30 PM — See you at the next one! **Where:** Microsoft Reactor Tel Aviv Menakhem Begin Rd 144, Level 50 Tel Aviv-Yafo After the official wrap-up, we'll continue any interesting discussions at a nearby bar for those who want to keep the conversation going. Spots are limited, so grab yours early. See you there!

**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)

קורס ארדואינו, ESP ורובוטיקה חכמה; מחברים רעיונות לעולם ה- IoT. קורס מעשי בן 10 מפגשים שבו רעיונות הופכים למערכות חכמות שפועלות בעולם האמיתי. נלמד לעבוד עם חשמל ואלקטרוניקה, נרכוש יסודות ב- C++, נשלב סנסורים, חיישנים (אור, חום, קול, מגע, מרחק) ונפעיל רכיבים כמו מנועים, רמקולים ולדים, עד לבניית רובוט מתנייע ונשלט. נחבר חומרה לאינטרנט באמצעות ESP32, לשליטה ובקרה מרחוק בזמן אמת ואפילו נלמד לשלב בינה מלאכותית לתוך הפרויקטים שלנו!. למבוגרים ונוער (16+). עלות: ₪2900 הנחה לתושבי יהוד שימו לב: לא מספיק להרשם במיטאפ יש להרשם גם בקישור הבא https://www.makelab.org.il/registration/arduino-course

מתי מריאנסקי, אומן ויזם בתחום הבינה המלאכותית, מייסד קהילת “עליית המכונות”, ידבר על החיים לצד הבינה. נגלה איך טכנולוגיה משנה את כל מה שחשבנו על עבודה ויצירה, נחשוף את שלושת המגמות המפתיעות שמניעות את השינוי ונלמד איך להגיע מוכנים לעולם החדש שמעבר לפינה. למבוגרים (15+). **שימו לב:** לא מספיק להרשם במיטאפ יש להרשם גם בקישור הבא , שם תמצאו גם פרטים נוספים https://link.makelab.org.il/Living-with-ai

Join us in the search for the true, the good and the beautiful. We will be reading and discussing a fascinating philosophical text in English. Welcome anyone interested in understanding life more deeply, regardless of age or prior knowledge. The love of wisdom is enough. Please join our WhatsApp group: https://chat.whatsapp.com/CDjIJ8i1LZsJ2a7WJXFxhG?mode=wwt Sapere Aude! (Kant's Motto: Dare to Think!)

\*The meeting will be held in Hebrew. . . . **Winning the Room: A Masterclass on Pitching & Presentations** Your pitch is your most important tool as a founder. Whether you are standing in front of investors, partners, or your very first clients, the ability to control the room and deliver a sharp, persuasive message is what turns a vision into a reality. This masterclass provides you with the practical, high-stakes tools you need to master your performance. . . **Why You Should Join (and why does it worth you time & money)** As an entrepreneur, your time is your most valuable asset. This webinar moves past theoretical advice and focuses on the "how-to" of public speaking and persuasion. This session is designed to be highly practical, focusing on the "how-to" of successful pitching. We will dive deep into the following: * **Practical Pitching Tools:** How to craft a focused and compelling pitch that hits all the right marks. * **Effective Communication:** Techniques to ensure your message is not just heard, but understood and remembered. * **The Power of Body Language:** Learning how to project authority and leadership through your physical presence. * **Building a Personal Story:** How to weave your personal narrative into the business case to create a lasting emotional connection. . . **The Bonus:** In a special interactive segment, you will have the chance to present **your own pitch live** during the webinar and receive immediate, professional feedback to refine your delivery. This is a rare opportunity to get expert eyes on your work before your next big meeting. . . **Important notice ‼️** This is a focused investment in your professional growth, designed to ensure that the next time you stand in front of a decision-maker, you are fully prepared to win. For that reason, we ask for a symbolic participation fee of 44 ILS. . . . **About the Speaker** The masterclass will be led by **Elad Hollander**, a serial entrepreneur and a seasoned expert in the global startup ecosystem. Elad Hollander is the Accelerator Program Director at the Resilience & Health Innovation Hub, where he designs and delivers end-to-end curricula for high-impact entrepreneurial programs. With a decade of experience at the intersection of founding, fundraising, and mentoring, Elad has guided more than 200 startups through the journey from raw ideas to investor-ready ventures. As a serial entrepreneur, Elad served as the Co-Founder & CEO of New York-based Spoilme Inc and is a Founding Partner at the sports tech agency Partners for Sports. With years of experience guiding founders through high-pressure situations, he brings a unique blend of strategic insight and practical performance coaching. . . . **About Rescue** This masterclass is held as part of the development phase for **Rescue**, an app providing mental first aid for anxiety and stress. Founded during the events of October 7th, Rescue already serves over 10,000 users. Having successfully reached our initial funding goal, all contributions now go directly toward further technological development and expanding our reach to hospitals and medical centers. . . . **Registration & Important Information** Please note that clicking "Going" on Meetup does not secure your spot. Attendance is strictly managed through the project’s Headstart page. 1. **How to Register:** Visit the campaign link below and select the reward titled **"Pitch & Presentation Masterclass"** for 44 NIS. 2. **Deadline:** Registration will close on **April 30, 2026**. 3. **Contact Details:** You must provide a valid email address during the Headstart checkout process. 4. **Confirmation:** Only those who purchase the specific reward will receive an official confirmation email and a calendar invite with the webinar link. . . . **Link for Registration and Supporting Rescue:** [Click here to register on Headstart](https://headstart.co.il/project/89269?utm_source=meetup)

Join us in the search for the true, the good and the beautiful. Each meet is in one of two formats: a shared reading and open discussion of philosophical texts, or a continuing series of lectures based on the reading of a fascinating book of philosophy. Both formats are in Hebrew, with some reading of English texts, assisted whenever needed. We meet weekly Friday on 80 Rokach Boulevard, Tel Aviv, at the gardens of the Council for a Beautiful Israel. Welcome anyone interested in understanding life more deeply, regardless of age or prior knowledge. The love of wisdom is enough. Please join our WhatsApp group: https://chat.whatsapp.com/JeAa2uRNTlF0rdrVTLzUC0?mode=wwt Note: there's always enough sitting room, but some of it is on the grass or a mat on the floor. If you want to guarantee yourself a chair, please bring one with you. Sapere Aude! (Kant's Motto: Dare to Think!)

Columbus Code & Coffee is an inclusive, informal co-working session. People of all skill levels attend, and we love it that way. Many people (optionally) bring projects to work on, and many other people (optionally) socialize the entire time. It's entirely up to you! **What to Expect at the Intro Circle** \~\~\~\~\~\~\~\~\~\~\~\~\~ Near the beginning of the event (1:30 pm), we do a standup: * Organizer announcements, updates, and logistics Round 1 - (7 secs max): * Your name * What you're working on * What you can help others with Round 2: * Community events you wanna plug. If none, that's cool too. Round 3: * Job opportunities you're hiring for OR announce that you are looking for one. If none, that's cool. After the introduction circle, everything is self-organized! Feel free to work alone, pair up, attend one of our workshops/presentations, or mingle!

Join us for **Ben Frain**'s talk ... Ben's book "Responsive Web Design With HTML5 and CSS" caught my attention (and should interest you as well). Find it here: [https://rwd.education/](https://rwd.education/) ***Bring your laptop and expect to write some (non-AI generated) code!*** Food and drinks will be available. **LOCATION:** 6515 Longshore Loop, Suite 300, Dublin, OH 43017 **FREE PARKING:** 6725 Longshore Street, Dublin, OH 43017

Topic to be announced. **CALL FOR SPEAKERS** Learn more: https://www.awscolumbus.com/get-involved/ **THANK YOU** *VEEAM* for hosting our meetup! To learn more about *Veeam*, please visit their website: https://www.veeam.com/ **DIRECTIONS** 8800 Lyra Dr #450 · Columbus, OH go to 4th floor. **Want to sponsor the pizza and/or bar tab?** Please contact me if you would like to sponsor this meetup's pizza and/or bar tab: angelo@mandato.com

**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** TBD **YouTube Link** TBD

Christians in Tech is a community at the intersection of faith and technology. Our meetups are designed to spark meaningful conversations, promote knowledge sharing, and encourage growth—both in your career and your spiritual walk with God. Whether you're an experienced professional or just starting your tech journey, CIT welcomes you. Our Website [https://linktr.ee/citcbus](https://linktr.ee/citcbus) Sponsors and Partners * Improving (Venue Sponsor) * Bethel World Prayer Center (Fiscal Sponsor) * Fruits & Roots (Coffee Partner)

Topic to be announced. **THANK YOU** *Franklin University* for hosting our meetup! To learn more about *Franklin University*, please visit their website: https://www.franklin.edu/ **DIRECTIONS** Franklin University Fisher Hall 300 E. Main St, Columbus, OH 43215 Map: https://maps.app.goo.gl/jxjBA2hUmS5qrvhq8 Parking is FREE! Please park in Lot C in front of Fisher Hall. See attached map. NOTE: Map the address only. When mapping with Google Maps it may use the Fisher Hall at OSU, which is NOT correct. **Want to sponsor the pizza and/or bar tab?** Please contact me if you would like to sponsor this meetup's pizza and/or bar tab: angelo@mandato.com

Columbus Code & Coffee is an inclusive, informal co-working session. People of all skill levels attend, and we love it that way. Many people (optionally) bring projects to work on, and many other people (optionally) socialize the entire time. It's entirely up to you! **What to Expect at the Intro Circle** \~\~\~\~\~\~\~\~\~\~\~\~\~ Near the beginning of the event (1:30 pm), we do a standup: * Organizer announcements, updates, and logistics Round 1 - (7 secs max): * Your name * What you're working on * What you can help others with Round 2: * Community events you wanna plug. If none, that's cool too. Round 3: * Job opportunities you're hiring for OR announce that you are looking for one. If none, that's cool. After the introduction circle, everything is self-organized! Feel free to work alone, pair up, attend one of our workshops/presentations, or mingle!