Java EE

Hi everyone! I’m happy to announce our next monthly meetup will take place at **MaMa** (Preradovićeva 18) on **Tuesday, March 24th**, starting at **6 PM.** We’ve got two great talks lined up, and afterward, we’ll head over to **"Old Pharmacy Pub"** (Andrije Hebranga 11) for some casual networking, so as always, be sure to stick around! \*\*\* **Test-driving frontend: A real-world example** by Marko Bjelac Test-driven development is a little explored topic, especially when it comes to frontend code. During the talk I will explain (shortly) what test-driven development is, what are the challenges when applying it to frontend development and how to overcome them - all the while showing how my team test-drives an Angular frontend with Jest, Angular Testbed & Storybook. **Oxlint & oxfmt, linting and formatting from the future** by Matija Marohnić I prefer faster linting and formatting than what ESLint and Prettier can provide. Biome was promising at first, a single tool that can perform both jobs, but its priorities clashed with mine, so I started to look elsewhere — enter VoidZero's oxlint & oxfmt. See you there! Marcela

​Get ready for the first official Cursor Hackathon in Croatia! ​Bring your laptop with Cursor, an open mind, and spend a Saturday with us building something Zagreb wants. ​Schedule ​9:30 - Check-in ​10:00 - Opening ​10:45 - Start of the hackathon ​16:45 - Submissions close ​17:00 - Networking ​17:30 - Presentations ​18:30 - Q&A with Cursor Engineer ​19:00 - Award ceremony & Closing GDG Zagreb Special Award — Best Google Integration ​Prize: €200 in cash plus swag, awarded to the winning team (split among members) Judging: GDG Zagreb judge Winning criteria: Alongside the main hackathon prizes, GDG Zagreb is awarding a special prize to the team that best integrates Google technology into their project. To be eligible, your project must use at least one Google Cloud product or API in a meaningful, functional way. The integration must be working and demonstrable during your presentation. Google technologies that count toward eligibility include Gemini API, Firebase Authentication, Firestore, Google Maps API, Places API, Cloud Vision API, Cloud Translation API, and more. If you're using a Google product not on this list, it likely still counts — when in doubt, ask. Projects that incorporate Gemini in a meaningful way receive bonus consideration. ​What's the theme of the hackathon? ​The theme of the hackathon is "Build Something Zagreb Wants". ​You'll get more info at the event! ​Will there be something to eat? ​Yes! There will be pizza and drinks available throughout the event. Please contact us if you have dietary restrictions and we'll try to accommodate you! Will there be a prize? ​Each member gets $20 in Cursor credits for attending. Additionally, the winning teams each get additional Cursor credits ($200+). ​Additional prizes may be announced soon, so keep an eye on this page 👀! Can I come with a team? ​You're free to come alone or with a team. To keep it balanced for everyone, the maximum team size is 5 members. ​Please make sure that every team member registers through this page! What are the rules? ​Your project must be built using Cursor. ​Your project must be built during the hackathon. You may bring a boilerplate template to make setup easier (eg. create-next-app). ​Your project must fit the theme. ​Your project must be software (web app, mobile app, AI agent, etc.). Do I need to be a developer? ​Absolutely not! As long as you have an open mind and enjoy building with Cursor, please come! Do I need to be from Croatia? ​Not necessarily. ​Due to high demand and Cursor hosting many events like this throughout Europe and the world, we prefer local participants who are based in or near Croatia. If you're outside that region, check out other Cursor events in the community calendar! Do I have to bring anything? ​Your laptop, charger and your Cursor account! ​Please note that in order for you to receive Cursor credits, you must use a personal Cursor account. It's not possible to redeem credits for Team and Enterprise plans. Agenda --- Hosted By Marko Filipović, Organizer Mario Vegh, Organizer Petra Brčić, Data Scientist An experienced applied mathematician who has transitioned into IT, still thinking about PhD. Worked as a data scientist in big corp, applying strong mathematical background to extract valuable insights from complex datasets, enabling informed decision-making. Now living freely, leading a startup and building an AI product to improve the lives of 1 in 10 women worldwide, hopefully more. Antonio Hadrović, Organizer Front-end, Figma and Future Ivan Štajcer, Flutter developer Sandro Lovnički, Flutterer Flutterer at SciPly | Organizer at GDG Zagreb and Flutter Croatia | Creator of Beamer package | Co-host of Flutter dArtists | Consultant, speaker and open source contributor Complete your event RSVP here: https://gdg.community.dev/events/details/google-gdg-zagreb-presents-cursor-hackathon-zagreb/.

Hello Rubyists! This month, we're turning our attention to AI and the many ways it's already changing how we work and build with Ruby and Rails. Our meetup will have 3 shorter talks so we can get more perspectives how different developers and companies use AI. A big thank you to [RubyCentral](https://rubycentral.org), in partnership with [GitHub](https://github.com), for making this event possible and for graciously covering the cost of the venue. Their support helps us keep events like this going. After the talks, we'll keep the evening going with the unofficial part of the meetup at the nearby cafe, so stick around for a drink and continue the conversation. See you at BIZkoshnica! \*\*\* **Keeping AI Agents in a Sandbox** by [Marko Avlijaš](https://www.linkedin.com/in/marko-avlijas/) This talk is about building a safer environment for AI agents. Since an LLM agent cannot be fully trusted, the goal is to limit what it can access and what damage it can do. The agent runs inside a Firecracker microVM and a Podman container, with access only to approved data and services. The talk will also give a simple overview of isolation in containers and virtual machines. It will cover the basic ideas behind namespaces and cgroups, touch on past escape vulnerabilities, and explain how auditing can help detect suspicious behavior. **To vibe, or not to vibe, is that the question?!** by [Iskren Nemet](https://www.linkedin.com/in/izkreny/) As it is almost impossible to hide from the AI tsunami, what can you do if you actually want to learn fundamental and advanced programming techniques, and not just be another AI agent shepherd? Let's pair up with Socrates and examine together what options are on the table and how we can use them inside our Ruby and Rails world via VS Code, the most standard and popular code editor today, and its AI fellow: GitHub Copilot. **Wanna upgrade your agent flow?** by [Fran Zekan](https://www.linkedin.com/in/zekan/) We all probably tried some form of Copilot AI autocomplete, most of us probably at least tried agents. But what about those mythical "10/20/50x speed improvements"? How do you "spend $1000+ in token in a month"?. "How is this actually helping you"? The goal of this talk is to show a couple of tricks / hacks for how to use agents to work *smarter.*

Zagreb language and culture exchange meetup. Chat in many languages, meet new people and plan adventures together. Hey everyone! 👋 As spring arrives in Zagreb and the city wakes up again, we’re keeping Thursdays social with **Small Friday International Zagreb** ([SFIZ.FUN](https://sites.google.com/view/smallfridayinternationalzagreb/)) a relaxed international meetup where locals, expats, Erasmus students and travellers gather to chat, exchange languages, share stories and plan the next adventure. Think of it as Zagreb’s global living room with lively conversations, and that moment when a random Thursday evening decides to surprise you. ✨ Whether you’ve just arrived in Zagreb, been here a while, or live around the corner, you’re very welcome. 📍 **When & Where** 📍 **The Beertija** Pavla Hatza 16, Zagreb 🕗 **Every other Thursday from 8PM** ✨ Free to join: simply grab a drink and support our host bar 🍺🎸 ✨ Open to everyone: all ages, backgrounds and language levels 💬 **What Happens at [SFIZ.FUN](https://sites.google.com/view/smallfridayinternationalzagreb/)**? Expect a relaxed, social atmosphere where conversations flow naturally. 🗣️ La**nguage Exchange** English, Croatian, Spanish, French, German, Italian, Ukrainian, Russian… and often more. 🌍 **Cultural Exchange** Locals, expats, travellers and Erasmus students sharing stories, experiences and perspectives. 🤝 **New Connections** Real conversations, genuine laughs, and the occasional new friend. 📅 **Weekend Planning** People often end up planning hikes, concerts, trips, festivals or nights out together. No formal structure, no pressure, just people meeting people. 🌸 **Why Join in Spring?** Spring is when Zagreb truly comes alive. Magnolia trees bloom across the city, café terraces fill with conversation, and longer sunny days invite people outdoors. Locals stroll through parks, cycle along the Sava, run around Jarun and Bundek lakes, or escape to the nearby Medvednica mountain for hikes and views above the city. At the same time, Zagreb’s cultural calendar blossoms with exhibitions, concerts, festivals and theatre performances, while markets like Dolac overflow with seasonal produce: asparagus, wild garlic, strawberries and fresh flavours of the season. It’s the perfect time to meet people and explore the city together. And many of those plans begin right here, at [SFIZ.FUN](https://sites.google.com/view/smallfridayinternationalzagreb/). 🌍 🍺 **Why The Beertija?** Because it’s more than a bar, it’s our headquarters. Expect: 🌿 leafy terrace vibes 🎸 rock-inspired atmosphere 🍺 excellent beers 🛋️ relaxed living-room energy 🚭 non-smoking indoor space It’s the kind of place where you pop in for one drink and suddenly realise the evening flew by. 💡 **First-Timer Tip** If it’s your first time: 👋 arrive early 🙂 smile and say hello 💬 jump into a conversation Everyone was new once and that’s how all starts. 🌍 **Join the Crew** [SFIZ.FUN](https://sites.google.com/view/smallfridayinternationalzagreb/) is a community built by the people who show up. So if your Thursday evening could use a little more conversation, laughter and international energy, come by and join us. Bring a friend if you like, or come solo and meet new ones. ✨Ditch the screen, grab a drink, meet the world🌍 See you on Small Friday! 🍻 **SFIZ Crew** P.S. Spread the word https://sites.google.com/view/smallfridayinternationalzagreb 🔎 **How to Spot Us** New here? Best trick is to swing by right at the start, that’s when it’s easiest to find the crew and jump straight in, or ask the bar staff about the event ✨ Need quick updates or can’t see us straight away? No worries, our [WhatsApp group](https://sites.google.com/view/smallfridayinternationalzagreb/faq/sfiz-whatsapp-guide-keeping-it-fun-and-respectful) is where you can ask quick questions. 💖 #ZagrebGlobalMingle 💖

Carissimi, proseguiamo il nostro viaggio per parlare di **#AWS** ! Ci troviamo in **#presenza giovedì 26 marzo alle ore 19:00**. L'incontro si terrà presso il[ Coworking Mestre](https://www.google.com/maps/search/?api=1&query=45.480717%2C%2012.250518), in via Torino 135, di fronte al NH Laguna Palace Hotel. E per chi non potesse raggiungerci, si terrà anche in **#streaming** su YouTube. La scaletta prevede due speech seguiti da discussione ciascuno. 🗣 [Federico Parezzan](https://www.linkedin.com/in/federico-parezzan/), ci parlerà di come sia semplice fare app in **#Flutter**, con un approccio **#CodeFirst**, sfruttando **#AWSAmplify** e **#CloudSandbox** per uno sviluppo **#Fullstack** in tempi record ! A seguire 🗣 [Salvatore Caputi](https://www.linkedin.com/in/salvatorecaputi/), ci racconterà di come gestire processi lunghi con **#AWSBatch** nel mondo del **#CloudComputing** ! 👥 Poi ci sposteremo per \( 🍸 \| 🍺 \) & \( 🍕 \| 🍔 \) e **#networking** ! E come sempre, proponete[vi per] argomenti e/o location con il [Form Google](https://forms.gle/1JdE6YWPbo6phuLe8) o direttamente nel canale Telegram !

Netko je jednom rekao - jedini pravi programeri su matematičari i fizičari - pa nas programere veseli ugostiti Antoniju Capan profesoricu savjetnicu matematike, Zrinku Tomašković, profesoricu matematike i Josipa Karasa, profesora fizike. **STEM obrazovanje** sve je važnije za razvoj vještina potrebnih u svijetu koji se brzo mijenja. No kako ono izgleda u praksi – *u učionicama, projektima i radu s učenicima*? Od Antonije Capan ćemo iz prve ruke naučiti o aktivnostima karlovačkih nastavnika koji koriste integrirani pristup učenju kroz praktične projekte, učenju rješavanjem stvarnih problema i kreativnom radu s učenicima, kakvi se STEM projekti provode u karlovačkim školama, koje se digitalne i edukacijske alate koristi u nastavi i koje dobre prakse potiču kritičko razmišljanje i samostalno istraživanje učenika. Antonija je s kolegicama i kolegama pokrenula i *StemKA konferenciju*, koja u Karlovac dovodi izvrsne predavače i primjere inovativnog rada u obrazovanju. Govorit ćemo i o iskustvu organiziranja takvog događaja te o tome kako se oko STEM-a gradi lokalna zajednica. U predavanju će se također osvrnuti na aktualna istraživanja o stanju STEM obrazovanja, izazove poput nedostatka nastavnika te inicijative koje kroz rad udruga pokušavaju unaprijediti sustav. Razgovarat ćemo i o novom nastavnom kurikulumu povezanim s *umjetnom inteligencijom*, u čijoj izradi Antonija sudjeluje. Ako vas zanima kako izgleda **STEM obrazovanje iz prve ruke** – i kako možemo potaknuti nove generacije na *znanost, tehnologiju i kreativno razmišljanje* – **pridružite nam se**. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- Zrinka i Josip pozvat će nas u **“Kozmos na karlovački način”** i pokazati kako približiti *svemir* u učeničke klupe, te kako u praksi objašnjavaju *odnose planeta u Sunčevom sustavu*. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- **Antonija Capan** Magistra edukacije matematike, učitelj savjetnik u Osnovnoj školi Grabrik te predsjednica udruge stemKA - udruge za popularizaciju znanosti. Sudjeluje u radnoj skupini za izradu nacionalnih ispita te u izradi kurikuluma vezanih uz primjenu umjetne inteligencije u školama. Idejna je začetnica i organizatorica natjecanja nauMATiKA, međunarodne STEM konferencije stemKA i projekta „Sat za znanost“. **Zrinka Tomašković** Profesorica matematike zaposlena u Gimnaziji Karlovac od 2008., gdje je ponovno uvela nastavu nacrtne geometrije. Aktivno sudjeluje u organizaciji brojnih matematičkih natjecanja i događanja za učenike. Suorganizatorica je regionalnog natjecanja nauMATiKA, STEM konferencije stemKA i projekta „Sat za znanost“. Bavi se popularizacijom matematike, objavljuje stručne materijale te od 2024. ima zvanje profesor mentor. **Josip Karas** Magistar edukacije fizike koji od 2022. radi kao učitelj fizike u više osnovnih škola i srednjih škola u Karlovačkoj županiji. Sudjeluje u organizaciji STEM konferencije stemKA i projekta „Sat za znanost“ te vodi radionice za popularizaciju znanosti među učenicima. Aktivno je uključen i u sportske i planinarske aktivnosti kroz rad u atletskom i planinarskom društvu.

Hallo liebe Java User Group Mitglieder! Diesmal haben wir Thomas Künneth mit seinem Talk zum Thema "**Climbing the Codeberg - Some Developer's Thoughts on Leaving GitHub**" zu Gast. Wir freuen uns euch zu sehen (virtuell oder vor Ort). * 17:45 Uhr: Einlass * 18:15 Uhr: Talk * ab 19:00: Ausklang des Abends Dank an [codecamp:n](https://www.codecamp-n.com/) für Location, Bier und Pizza! \-\-\- As developers increasingly prioritize privacy, digital sovereignty, and true open-source values, many are questioning their reliance on corporate-owned platforms like GitHub. Enter Codeberg—a community-driven, non-profit Git hosting platform funded by donations and powered by Forgejo. But is the grass really greener, and how difficult is the transition? In "Climbing the Codeberg," we’ll explore both the philosophical motivations and the practical realities of leaving GitHub. Walking through a firsthand developer's journey, this talk will guide you through the process of establishing your code’s new home and taking back control of your workflow. In this session, we will cover: * The "Why": Understanding the fundamental differences in philosophy and legal structure between a corporate-owned giant and a non-profit, community-led alternative like Codeberg. * Safe Migration Strategies: Step-by-step insights on migrating repositories (including metadata like issues and releases), proving your identity via Mastodon, and utilizing "tombstoning" techniques to avoid critical security risks like namespace hijacking on your old GitHub account. * Restoring Automation: Leaving GitHub doesn't mean leaving CI/CD behind. We'll dive into leveling up your new environment by setting up local Codeberg Actions runners, exploring both containerized (Docker) approaches and host-level (act_runner) configurations for architectures like Apple Silicon. Whether you are ready to make the full leap to a community-owned forge or simply want to explore what true digital sovereignty looks like, this session will equip you with the tools, commands, and insights needed to successfully summit the Codeberg. \-\-\- Dein Vortrag bei der Java Usergroup Nürnberg! Hast du dich in letzter Zeit in deinem Projekt oder privat mit einem interessanten Thema beschäftigt? Vermutlich ist das nicht nur für dich selbst interessant! Hast du Lust, selber einmal einen Vortrag bei der Java-Usergroup Nürnberg zu halten? Wir sind nicht nur auf Java-Themen fokussiert, sondern beschäftigen uns gern mit und um alles über Software Entwicklung und IT. Wir wollen bei der JUG nicht nur bekannten Speaker\*innen eine Plattform geben und die neuesten State-of-the-Art Technologien vorstellen. Wir freuen uns auch besonders, wenn wir Themen aus unserem technologischen (Arbeits-)alltag Raum geben zu können. Melde dich gerne bei uns, wenn du dazu Lust hast, wir geben wenn gewünscht gerne auch Hilfestellung bei der Vorbereitung!

Discover Kiro, AWS’s innovative development environment that adapts to your workflow. Whether you prefer specification-driven development or a more intuitive, vibe-based approach, Kiro empowers you to build applications your way. In this session, speakers will explore Kiro’s core functionality and its evolution through re:Invent 2025, along with demonstrations of prompts used to create APIs, hooks, and steering documents. In the latter part of the session, watch as we build a complete example from scratch, showcasing Kiro’s agentic AI workflow in action for spec-driven development and vibe coding. What You'll Learn - Core Kiro concepts and development philosophy Feature evolution: pre and post re:Invent 2025 Practical examples: API creation, hooks, and steering docs Live coding demonstration with real-time problem solving Who Should Attend - Developers, solutions architects, and technical leaders interested in modern AWS development tools and AI-assisted coding workflows. **Speakers Bio:** Matthew Jorat: Matthew Jorat is a Customer Solutions Manager at AWS with nearly three decades of expertise in AI, cloud transformation, migration, modernization, IT, technology, and business. His career spans infrastructure engineer, solutions architect, security auditor, customer success director, support and services director, and operations officer. He was an early adopter of AWS services as a customer, and his current role at AWS uniquely blends his technical and business skills as he partners with executive teams to translate strategic priorities into measurable business outcomes through cloud adoption, AI implementation, and operational excellence. Matt leads end-to-end AI initiatives for enterprise customers, identifying high-impact use cases and maintaining relentless focus on measurable ROI. He holds eight AWS certifications and serves as Adjunct Professor at Franklin University teaching cloud computing and AWS architecture. His expertise encompasses GenAI, agentic AI systems, migration, modernization, and optimization strategies that drive transformation at scale. [https://www.linkedin.com/in/mattjorat/](https://www.linkedin.com/in/mattjorat/) Girish Bhatia: Girish Bhatia is a seasoned technology delivery leader with deep expertise in cross-domain program management. He holds multiple AWS certifications, including AWS Certified Solutions Architect – Associate, AWS Certified Developer – Associate, and AWS Generative AI Practitioner, and is also an AWS Community Builder. Girish brings over two decades of experience in the information technology industry. Throughout his career, Girish has led major technology-driven business transformation from modernizing on-premises applications to driving large-scale cloud migrations. His work includes API-based integration platforms, data-center and mainframe modernization, and enterprise cloud adoption initiatives. Based in Columbus, Ohio, Girish works at a tech-forward fintech company. He is passionate about AWS serverless architectures, Generative AI and emerging cloud technologies. An avid learner and builder, he continues to explore and apply the latest innovations in AWS to help organizations accelerate their digital transformation. https://www.linkedin.com/in/girishbhatia/[https://www.linkedin.com/in/girishbhatia/](https://www.linkedin.com/in/girishbhatia/) **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

WQC has weekly Thursday night social nights at the Westerville Java Central. Come and grab a coffee and connect with the community: low stakes, chill environment, and tasty drinks. No registration is required; come as you are.

**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 **Abstract** Web Forms gave .NET developers a powerful abstraction for building reusable UI controls long before design systems were a thing. Web Components finally bring that same idea to the browser natively. This session explores how the Web Forms mindset translates into Custom Elements, Shadow DOM, and HTML templates. We’ll examine how Web Components enable design systems that work across frameworks, how they differ from server‑driven controls, and why they’re becoming a foundational layer for modern UI. Whether you’re maintaining legacy apps or building greenfield projects, you’ll leave with a practical understanding of how to apply familiar patterns in a modern, standards‑based way. **YouTube Link** TBA

Come chat about Atlassian tools and best practices at the Nationwide Sunny Street Cafe and Breakfast is on Atlassian! Let's get the day started off with breakfast with your ACE Leaders! We're always excited to talk about Atlassian Products, share our knowledge and hand out swag! Come chat with us about new product news and anything you are working on within the Atlassian product stack. This is a great opportunity to come see what we are all about, hear new business news and share with other Atlassian users your questions and experiences. We'd love to see new and old friends come out to chat and learn about Atlassian! Agenda --- Moderators Kimberly Deal - Columbus Atlassian User Group Leader Kevin Stanley - Columbus Atlassian User Group Leader Hosted By Kimberly Deal, Atlassian User Group Leader Kevin Stanley, Chief Everything Greg Sprowls, Agility Lead --- Global Partner Atlassian (http://atlassian.com) Millions of users globally rely on Atlassian products every day for improving software development, project management, collaboration, and code quality. Partner Atlassian --- For over a decade, Atlassian customers have come together to network, share ideas, solve problems, and find new ways to use Atlassian products. Today, more than 15,000 people take part in Atlassian community events in more than 30 countries. --- Complete your event RSVP here: https://ace.atlassian.com/events/details/atlassian-columbus-presents-rise-and-shine-with-atlassian-downtownnationwide-22/.

Private Group. Closed to the Public Knowing ourselves and understanding our abilities is the first step toward wielding our gifts with control and accuracy. In subsequent classes we will verify and hone our talents with activities and discussion. These are hands-on workshops and participation is expected. The goal of our series will be to develop expertise in areas of particular interest such as mediumship, channeling, divination, healing and, etc.. Our ultimate directions will be determined by class members as we evolve. I look forward to sharing and discovering with you. - Cynthia

**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: Type Annotations with John Cassidy 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