Big Data

The event will be held in English For English below \- \- \- \- \- "Денят на Предприемача" е ежемесечно събитие на живо, на което каним успешни предприемачи, за да разкажат какво стои зад резултатите им. Освен нашите въпроси, всеки от присъстващите може да зададе и свои и да се включи в разговора. През месец май очаквайте Matthias Zeitler, сериен предприемач Matthias Zeitler builds and operates long-term residential environments where people live and work — with a focus on making them economically and structurally viable over time, not just attractive in the short term. He has lived and worked internationally and is now based in Bulgaria, where he leads large-scale real estate and community projects. As chairman and operational lead of Coliving Semkovo, he is responsible for the redevelopment of a \~17,000 m² former hotel into a residential community with more than 200 units. His work centers on turning underused or mispositioned assets into functioning places — designing ownership structures, operational models, and governance that hold up under real conditions. He typically leads projects through uncertainty and then steps back once they are stable. Matthias was co-founder of Coworking Bansko, contributing to the town’s emergence as a global remote work hub, and founder of Bansko Nomad Fest, which he later exited. His earlier career includes senior product and technology leadership roles in international, enterprise-scale environments. His current and upcoming projects include Thracian Views, a residential redevelopment near Sofia, and Nomad Pioneers — an initiative exploring how new remote-work ecosystems form in emerging locations. His perspective is pragmatic: less about vision and positioning, more about what actually works over time — financially, operationally, and socially. Програма: 19:00 - 20:00 ч. : Регистрация\* и свободен нетуъркинг 20:00 - 21:00 ч. : Основна част с гост Matthias Zeitler, сериен предприемач ( на английски език! ) 21:00 - 21:30 ч. : Q&A 21:30 - 23:00 ч. : Свободен нетуъркинг \* Регистрацията ще бъде възможна през цялото събитие. Организатор и водещ: Ивайло Георгиев Кога: 18.05.2026 г. (понеделник), 19:00 - 23:00 ч. Къде: Gramophone Club, ул. Будапеща 6, София Вход\*: 15,34 € / 30 лв. \* Плащане на място в брой или с карта. Без нужда от предварителна регистрация. Ежемесечно организираме бизнес събития в Пловдив, София и страната. Последвайте нашата страница или уебсайт за актуална информация: https://www.facebook.com/EntrepreneursNightOut https://entrepreneursnightout.org Очакваме Ви! \- \- \- \- \- "Entrepreneur’s Day" is a monthly live event where we invite successful entrepreneurs to share what stands behind their results. In addition to our own questions, everyone attending can ask questions and join the conversation. This May, expect Matthias Zeitler, serial entrepreneur. Matthias Zeitler builds and operates long-term residential environments where people live and work — with a focus on making them economically and structurally viable over time, not just attractive in the short term. He has lived and worked internationally and is now based in Bulgaria, where he leads large-scale real estate and community projects. As chairman and operational lead of Coliving Semkovo, he is responsible for the redevelopment of a \~17,000 m² former hotel into a residential community with more than 200 units. His work centers on turning underused or mispositioned assets into functioning places — designing ownership structures, operational models, and governance that hold up under real conditions. He typically leads projects through uncertainty and then steps back once they are stable. Matthias was co-founder of Coworking Bansko, contributing to the town’s emergence as a global remote work hub, and founder of Bansko Nomad Fest, which he later exited. His earlier career includes senior product and technology leadership roles in international, enterprise-scale environments. His current and upcoming projects include Thracian Views, a residential redevelopment near Sofia, and Nomad Pioneers — an initiative exploring how new remote-work ecosystems form in emerging locations. His perspective is pragmatic: less about vision and positioning, more about what actually works over time — financially, operationally, and socially. Program: 19:00 – 20:00 \| Registration\* and open networking 20:00 – 21:00 \| Main session with guest Matthias Zeitler\, serial entrepreneur \(in English\!\) 21:00 – 21:30 \| Q&A 21:30 – 23:00 \| Open networking \*Registration will be available throughout the entire event. Organizer and host: Ivaylo Georgiev When: 18.05.2026 (Monday), 19:00 – 23:00 Where: Gramophone Club, 6 Budapest St., Sofia Entrance\*: €15.34 / 30 BGN Payment on-site by cash or card. No pre-registration required. We organize monthly business events in Plovdiv, Sofia, and other cities across Bulgaria. Follow our page or website for updates and upcoming events: https://www.facebook.com/EntrepreneursNightOut https://entrepreneursnightout.org We look forward to seeing you!

Please join us on May 20th for an amazing co-hosted practical meetup with the Data Science Society! ## What can you expect? ​This hands-on workshop explores how modern AI tools are changing everyday software engineering. Participants will see practical, real-world examples of how developers use tools like Kiro, Claude Code, Windsurf, and Cursor to write, debug, refactor, and understand code more efficiently. ​The session focuses on concrete use cases - speeding up feature development, improving code quality, navigating large codebases, and integrating AI into existing development cycles. It will give attendees a clear view of what “AI-augmented development” looks like in practice. ## ​Who will present? ​We have 4 speakers : * ​Rosen Krumov * ​Borislava Bagaliyska * ​Petar Ivanov * ​Viktor Botev ​Soon we will announce a bit more about the concrete expertize and focus of each of them! # ​Official partner ​For this meet-up our official partner is [iris.ai](https://iris.ai/?utm_source=luma). ​[Iris.ai](https://iris.ai/?utm_source=luma) is the AI Development and Operation Platform for building secure, high-performance Agentic RAG systems. ​Event is free but registration is mandatory: https://luma.com/bz9lg7aq

4 години споделяме знание! Създаваме сигурност. Празнуваме заедно! Настъпи момент да отпразнуваме заедно **4-тата** **ГОДИШНИНА на Cyber Security Talks Bulgaria**. Този път без домакин и по много по-различен начин. Заповядайте на нашето парти в Art Bar 158 на **20.05**. Вече 4 години създаваме общност, споделяме опит, мнение и научени уроци, защото така вярваме, че ще постигнем по-сигурно Киберпространство за всички нас. Стъпвайки отново фраза от добре познатия ни сериал „Бар Наздраве“ : „Where everybody knows your name“, бихме казали, че Cyber Security Talks Bulgaria се утвърди като място, където всеки е добре дошъл. На 20 май това място е „Art Bar 158” (ул. „Княз Борис I“ 158). Подготвили сме една по-различна от обичайното програма, но ще я разкриваме постепенно. Както казваше един знаменит българин „Часът и мястото на срещата са известни“ – Часът е обичайният, дата - нестандартна, мястото – различни от всяко до момента. **Всеки гост на нашето парти ще получи подарък. Първото питие е от нас.** Ела на едно по-различно събитие с quiz, жива музика и приятни моменти. Бъди част от общността! Следете страниците в социалните мрежи и канала ни в Discord, за да научавате повече: · LinkedIn: [https://www.linkedin.com/company/cyber-security-talks-bulgaria](https://www.linkedin.com/company/cyber-security-talks-bulgaria) · Facebook: [https://www.facebook.com/profile.php?id=61588273361718](https://www.facebook.com/profile.php?id=61588273361718) · Meetup: [https://www.meetup.com/Cyber-Security-Talks-Bulgaria-Meetup-Group/](https://www.meetup.com/Cyber-Security-Talks-Bulgaria-Meetup-Group/) · Discord: [https://discord.gg/MPMAgmCbWs](https://discord.gg/MPMAgmCbWs) (#cybersec-talks) · Website : [https://www.cybersecuritytalks.bg/](https://www.cybersecuritytalks.bg/)

The event will be held in English For English below \- \- \- \- \- "Денят на Предприемача" е ежемесечно събитие на живо, на което каним успешни предприемачи, за да разкажат какво стои зад резултатите им. Освен нашите въпроси, всеки от присъстващите може да зададе и свои и да се включи в разговора. През месец май очаквайте Matthias Zeitler, сериен предприемач Matthias Zeitler builds and operates long-term residential environments where people live and work — with a focus on making them economically and structurally viable over time, not just attractive in the short term. He has lived and worked internationally and is now based in Bulgaria, where he leads large-scale real estate and community projects. As chairman and operational lead of Coliving Semkovo, he is responsible for the redevelopment of a \~17,000 m² former hotel into a residential community with more than 200 units. His work centers on turning underused or mispositioned assets into functioning places — designing ownership structures, operational models, and governance that hold up under real conditions. He typically leads projects through uncertainty and then steps back once they are stable. Matthias was co-founder of Coworking Bansko, contributing to the town’s emergence as a global remote work hub, and founder of Bansko Nomad Fest, which he later exited. His earlier career includes senior product and technology leadership roles in international, enterprise-scale environments. His current and upcoming projects include Thracian Views, a residential redevelopment near Sofia, and Nomad Pioneers — an initiative exploring how new remote-work ecosystems form in emerging locations. His perspective is pragmatic: less about vision and positioning, more about what actually works over time — financially, operationally, and socially. Програма: 19:00 - 20:00 ч. : Регистрация\* и свободен нетуъркинг 20:00 - 21:00 ч. : Основна част с гост Matthias Zeitler, сериен предприемач ( на английски език! ) 21:00 - 21:30 ч. : Q&A 21:30 - 23:00 ч. : Свободен нетуъркинг \* Регистрацията ще бъде възможна през цялото събитие. Организатор и водещ: Ивайло Георгиев Кога: 18.05.2026 г. (понеделник), 19:00 - 23:00 ч. Къде: Gramophone Club, ул. Будапеща 6, София Вход\*: 15,34 € / 30 лв. \* Плащане на място в брой или с карта. Без нужда от предварителна регистрация. Ежемесечно организираме бизнес събития в Пловдив, София и страната. Последвайте нашата страница или уебсайт за актуална информация: https://www.facebook.com/EntrepreneursNightOut https://entrepreneursnightout.org Очакваме Ви! \- \- \- \- \- "Entrepreneur’s Day" is a monthly live event where we invite successful entrepreneurs to share what stands behind their results. In addition to our own questions, everyone attending can ask questions and join the conversation. This May, expect Matthias Zeitler, serial entrepreneur. Matthias Zeitler builds and operates long-term residential environments where people live and work — with a focus on making them economically and structurally viable over time, not just attractive in the short term. He has lived and worked internationally and is now based in Bulgaria, where he leads large-scale real estate and community projects. As chairman and operational lead of Coliving Semkovo, he is responsible for the redevelopment of a \~17,000 m² former hotel into a residential community with more than 200 units. His work centers on turning underused or mispositioned assets into functioning places — designing ownership structures, operational models, and governance that hold up under real conditions. He typically leads projects through uncertainty and then steps back once they are stable. Matthias was co-founder of Coworking Bansko, contributing to the town’s emergence as a global remote work hub, and founder of Bansko Nomad Fest, which he later exited. His earlier career includes senior product and technology leadership roles in international, enterprise-scale environments. His current and upcoming projects include Thracian Views, a residential redevelopment near Sofia, and Nomad Pioneers — an initiative exploring how new remote-work ecosystems form in emerging locations. His perspective is pragmatic: less about vision and positioning, more about what actually works over time — financially, operationally, and socially. Program: 19:00 – 20:00 \| Registration\* and open networking 20:00 – 21:00 \| Main session with guest Matthias Zeitler\, serial entrepreneur \(in English\!\) 21:00 – 21:30 \| Q&A 21:30 – 23:00 \| Open networking \*Registration will be available throughout the entire event. Organizer and host: Ivaylo Georgiev When: 18.05.2026 (Monday), 19:00 – 23:00 Where: Gramophone Club, 6 Budapest St., Sofia Entrance\*: €15.34 / 30 BGN Payment on-site by cash or card. No pre-registration required. We organize monthly business events in Plovdiv, Sofia, and other cities across Bulgaria. Follow our page or website for updates and upcoming events: https://www.facebook.com/EntrepreneursNightOut https://entrepreneursnightout.org We look forward to seeing you!

**Founders Running Club** (FRC) brings founders, investors, tech, creative people and startup enthusiasts together for weekly easy runs and networking. We like to be comfortable when we run and finish with coffee and conversations. Choose your pace or follow a pacer—pets, friends, family, are welcome. 🗓️ Launched in San Francisco, July 16, 2022 🌍 Now in 35+ cities 📅 Running + Networking events + Community **Join the community** [http://foundersrc.com/chats](http://foundersrc.com/chats) **Stay updated**: Instagram [http://instagram.com/foundersrc/](http://instagram.com/foundersrc/) Podcast [http://podcast.foundersrc.com/](http://podcast.foundersrc.com/) LinkedIn [http://linkedin.com/company/foundersrc/](http://linkedin.com/company/foundersrc/) Strava [http://strava.com/clubs/foundersRC](http://strava.com/clubs/foundersRC) Website [http://foundersrc.com/](http://foundersrc.com/)

We’re getting together at McCarthy’s for a different kind of evening—one cantered on the journeys that brought us to Sofia and the local roots that keep us here. Whether you’re a local, looking for a social drink after work or you just landed yesterday from afar, come grab a drink and help us bridge the gap between the expat and local scenes.

How will AI impact the arts? What are the ethics of parasocial relationships? Who deserves to be cancelled? Where are the limits of language? At this event, we'll explore detailed scenarios where these ethical dilemmas play out. We’ll rotate in small groups between four different scenarios. Discuss, share, and hear how others think. This is for anyone who enjoys: * Thought-provoking conversations * Meeting new people in small groups * Practical philosophy 📅 Date: Tuesday, 19 May 🕖 Time: Event begins at 19:15 📍 Location: The Steps (upstairs) 🎟️ Price: Free NOTE: There is NO LIMIT on the number of participants. Even if you don't reserve a spot, you can still come along.

Customer identity resolution becomes increasingly complex as organizations scale across multiple systems, regions, and data formats. Traditional rule-based approaches often fail to keep up with data variability, require constant manual tuning, and struggle with real-time processing needs. This session presents a practical approach to building a scalable identity resolution pipeline using AWS services and modern AI techniques. The architecture combines data ingestion through Amazon S3 and AWS Glue, transformation pipelines using Spark on EMR, and machine learning models deployed via SageMaker for entity matching and standardization. Graph-based relationship modeling is implemented using Amazon Neptune to improve resolution accuracy by incorporating household and shared attribute context. We will walk through how machine learning models can be used for name and address normalization, how intelligent blocking strategies improve matching efficiency, and how feedback loops can be introduced to continuously improve accuracy. The session also highlights how serverless components such as AWS Lambda can be used for orchestration and real-time processing. **SPEAKER BIO** Mosaic Syed is a Senior Data Engineering and Cloud Solutions Architect with over 20 years of experience designing and delivering scalable, secure, and high-performance data solutions across global enterprise environments. https://www.linkedin.com/in/mosaic-basha-syed-92300856 **CALL FOR SPEAKERS** Learn more: [https://www.awscolumbus.com/get-involved/](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/](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

**Improving Office in Franklinton** Physical location: Improving Office 330 Rush Alley Suite #150 Columbus, OH 43215 Schedule: 6:00 p.m.: Socialize, eat, and drink. Improving will be providing pizza and beverages. 6:30 to 8:00 pm. Main meeting and presentation(s). Topic: This month John Lairson will share a notebook describing the Alpaca (Paper) Trading API and discuss different algorithms for evaluating stock trades. We meet on the last Monday of each Month. Presentations are given by members and friends of this group. If you would like to do a presentation (small or large) on a python topic, please contact Central OH Python at centralohpython@gmail.com

Join the Columbus AI community for our quarterly gathering — a casual, community-focused evening where everyone has a chance to share, learn, and connect. These open mic–style events give anyone in the community up to **5 minutes** to present a project, share a tool, pose a question, or offer a perspective on the evolving AI space. No slides required — just a welcoming space to exchange ideas and keep the local AI conversation moving. If you’d like to take the stage, message \*\*Chris (the organizer)\*\*with a **title and short description** of what you’d like to share. Whether you’re deep in the field or just getting curious, come connect with others building and exploring AI in Columbus. Sponsored by [Transform Labs](https://www.linkedin.com/company/transformlabs/) Sign up also accessible via [Transform Labs Luma](https://luma.com/transformlabshq)

**Abstract:** This is a practical playbook for building a production-grade data lakehouse. It walks through foundational principles — naming conventions, least-privilege access, automated CI/CD testing — before diving into medallion architecture. Furthermore, metadata-driven design patterns show how configuration tables and dynamic notebook orchestration eliminates hard-coded pipelines. The deck covers star schema modeling, guidance on choosing between Spark, Pandas, and SQL, and data quality enforcement using DQX with YAML data contracts. Finally, we dive into security best practices and performance optimizations. **Host:** Justin Shea, Mehdi Jeddi, Erik Pak, and Sou-Cheng Choi **Talk Format:** This is a hybrid event. To attend online, join us on Zoom here at 6pm: https://iit-edu.zoom.us/j/89379230295?pwd=NdETyE5sdYuSrvsrBZXSBFkUESBVkg.1 Meeting ID: 893 7923 0295 Passcode: 5t5WYn **Sponsor:** Adyen, UIC College of Business, and PyData Chicago co-host this event. UIC will provide the meeting site. Adyen will sponsor pizza and soft drinks for the onsite participants. **Address:** University of Illinois - Chicago, Douglass Hall, Room 220, 705 S Morgan St, Chicago, IL 60607 **Logistics:** “UIC Douglass Hall” is recognized on Google Maps, which can guide you through campus. Once you arrive, proceed to the second floor, room number 220

**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

**Welcome to Drunken Philosophy** a casual, curious social discussion **Optional topic for this meetup: What's up with all the AI hate?** A recent survey found that 74% of Americans have a negative view of AI, and I want to know why. Come out and debate whether AI is good or bad. My hot take: a labor-saving tool that could potentially help cure cancer gets called dangerous because it might raise unemployment or cause a speculative investment bubble, that tells you a lot more about capitalism and the economic system we live under than it does about the tool itself. As a computer programmer, I think AI is a wonderful tool that has increased my productivity by at least an order of magnitude. I'd go so far as to say Claude Code is the best tool I have ever used. Debate me and name a better one. Is AI potentially dangerous? Yes, but so are a lot of tools. Chainsaws. Steam engines (early ones would occasionally explode and kill everyone in the room). Do you think cavemen sat around debating whether fire could be used as a weapon or for self-harm, and decided not to discover it? I have two friends who hate AI for opposite reasons: one thinks it's a fad and not useful, and the other thinks it's going to take over everything and cause human extinction. Come out tonight, have a friendly debate, and make some friends. No lectures. Friendly crowd. Drop in for one drink and stay if it's fun.

**Latest Dojo Location!** **Knotty Pine Brewing** 1765 W 3rd Ave, Columbus, OH 43212 We're going to try a new dojo location for a few weeks and see how it works Dojos are informal Python group study sessions where everyone interested in Python gathers to learn about Python, help others with Python, or just hang out. Everyone is welcome from Python beginners to experts. Bringing a laptop is encouraged (we'll have extension cords and power strips). If there's something you want to learn leave a comment on this invite so we can plan ahead. We're looking for speakers for our Monthly Meetups! Fill out the form if you are interested in presenting to the Python Community. https://forms.gle/ehSfUAC2WgR34Crq9