Statistical Modeling

Observability is supposed to help us understand our systems but for many teams it has quietly become one of the most expensive and least flexible parts of the stack. Plenty of organizations take polished SaaS platforms like Datadog to get real value quickly early on, only to hit the same wall later: runaway costs, pricing tied to architectural decisions, and vendor lock-in so strong it makes Rogers and Bell both blush. In this talk, I’ll walk through a real-world case study of a JVM-based production system that migrated away from a Datadog-centric observability setup to an open-source, OpenTelemetry-based platform. We’ll dig into the why behind the move, the architectural decisions that mattered, the mistakes along the way, and how the team ended up with pragmatic visibility into latency, errors, and resource usage at a fraction of the cost. The second half of the talk is practical and forward-looking. I’ll show how OpenTelemetry unlocks real choice by acting as a neutral data plane for your telemetry. From there, we’ll look at modern, off-the-shelf observability backends you can plug in within minutes without rewriting applications or installing new agents. Want to dual-write, swap vendors, or route data somewhere new? This is how you do it without a big-bang rewrite or another long-term commitment with a new vendor. This session is for engineers and CEOs who are feeling the observability cost squeeze, want leverage back from vendors, and are looking for realistic ways to modernize monitoring without lighting their entire stack on fire each time they decide to change their tools of choice. **About the venue** Free Times Cafe has bistro-style seating and a full food and drink menu. Please consider helping to support the venue by planning to have supper during the talk. **Speaker Bio** Alexei Zenin is a Platform Engineering Consultant based out of Toronto, Canada. Over the course of his career he has worked across the Healthcare, Marketing, Video Games, and Banking industries. He loves to tackle hard problems in the distributed systems space with a focus on scaling platforms both from a technical and process perspective. He is a strong advocate for highly maintainable and well tested code while at the same time pragmatically delivering value to the end user. He has contributed to the broader tech community, namely to Confluent’s blogs on Apache Kafka, spoken at Current 2022 in Austin, Texas, and spoken at XP Game Summit 2025 in Toronto, Canada. During his 5 years at Uken Games he contributed to several games like Who Wants to Be a Millionaire and Jeopardy. One title of note he saw from inception to completion was a game for Tim Hortons built right into the official app, Tim’s Word Challenge. Millions of Canadians have played it along with their morning coffee. He also got to work with Netflix on several unannounced games during his time at the studio. Currently, Alexei is working with various clients, both large and small to modernize and streamline their platforms with the most appropriate tools and practices. Outside of his professional life, he gives back to his community by volunteering at UofT. He also enjoys paddleboarding and attending live rock concerts to reset after long coding sessions.

**Attention attendees!** **To register, use** [Luma](https://luma.com/w9xt30te) Warning: The meetup is not a platform for RSVP registration; for this, you need to follow [thisLink ](https://www.eventbrite.com/e/founders-investors-pitch-night-in-toronto-tickets-1982873417770?aff=oddtdtcreator)to purchase a registration ticket. The meetup is one of the platforms through which we offer participation in our events. **Startup Valley — Toronto** A curated pitch night for startup founders, operators, angels and VC partners. We design these sessions to help founders sharpen their thinking through direct, candid feedback — and to give strong investors access to serious teams. **What happens:** • 4-8 startups pitch live and receive feedback from angels and VC partners • Feedback focuses on real decisions and next steps — not surface-level opinions • Investors stay in the room before and after pitches • The format leaves space for real conversations, not rushed networking • Attendance is limited to keep the room focused Designed for clear thinking, not noise. **Who you’ll meet:** * Startup founders * Angel investors and VC partners * Operators in marketing, sales, and tech * AI engineers * Local and international founders * AI Experts * Founders from Europe, Asia, and the United Kingdom **Practical details** **For investors:** We invite angel investors and VC partners to participate as judges and contributors. **To become a judge,** and get early access to our startups database, please fill out th[ the form](https://docs.google.com/forms/d/e/1FAIpQLSc8CVqvhQJu-AcclIF6PCuwjL4YpQt4w0FchGSoutRkt58v4g/viewform). Join the judge table, meet other investors, and see what teams are building early. Founders need your experienced view. **For pitching startups:** Startups selected to pitch will present live on stage and receive feedback from investors. **After purchasing a ticket:** Please[ submit your pitch deck](https://docs.google.com/forms/d/e/1FAIpQLSchcZr9gCNJh0RLiKBgbdbDBKEOc-92LNySkzHf8qGPHg5Wpg/viewform) and ensure it is open for viewers. **Agenda** **19:00 – 19:30** **Registration** Guests register, receive badges, and event programs. This is an opportunity for casual networking, making first connections, and preparing for the event. **19:30 – 20:30** **Event Kickoff & Interactive Networking** Official welcome from the organizers with a brief overview of the event goals and schedule. Interactive networking helps participants set their objectives and connect with key contacts. **20:40 – 21:20** **Startup Pitch Session** Startups present their projects to investors and experts. Each team has 5 minutes to pitch, covering the project's core idea, business model, and target market. **21:20 – 22:00** **Chill & Networking** Participants enjoy casual conversations with investors, discuss collaborations, and exchange ideas over refreshments.

This is a ticketed event. Please register at [this link](https://luma.com/e69uao09). ​In his talk, Samuel Simko from ETH Zurich will present his recent work on adversarial defenses for LLMs, developed with the Jinesis Lab (University of Toronto). The talk will cover a series of approaches, ranging from triplet-based contrastive learning defenses to honeypot-style defenses designed to avoid worst-case behavior. He will also discuss patterns observed in contest-winning manual jailbreaking prompts, ideas for tamper-resistant safeguards, and the current limits of attacks, defenses, and evaluation methodologies. ​**Event Schedule** 6:00 to 6:30 - Food and introductions 6:30 to 7:30 - Presentation and Q&A 7:30 to 9:00 - Open Discussions ​​​If you can't attend in person, join our live stream starting at 6:30 pm via [this link](https://www.youtube.com/@Trajectory-Labs/live).

**Attention attendees!** **To register, use** [Luma](https://luma.com/w9xt30te) Warning: The meetup is not a platform for RSVP registration; for this, you need to follow [thisLink ](https://www.eventbrite.com/e/tech-business-networking-toronto-tickets-1291770433139?aff=oddtdtcreator)to purchase a registration ticket. The meetup is one of the platforms through which we offer participation in our events. **Startup Valley — Toronto** A curated pitch night for startup founders, operators, angels and VC partners. We design these sessions to help founders sharpen their thinking through direct, candid feedback — and to give strong investors access to serious teams. **What happens:** • 4-8 startups pitch live and receive feedback from angels and VC partners • Feedback focuses on real decisions and next steps — not surface-level opinions • Investors stay in the room before and after pitches • The format leaves space for real conversations, not rushed networking • Attendance is limited to keep the room focused Designed for clear thinking, not noise. **Who you’ll meet:** * Startup founders * Angel investors and VC partners * Operators in marketing, sales, and tech * AI engineers * Local and international founders * AI Experts * Founders from Europe, Asia, and the United Kingdom **Practical details** **For investors:** We invite angel investors and VC partners to participate as judges and contributors. **To become a judge,** and get early access to our startups database, please fill out th[ the form](https://docs.google.com/forms/d/e/1FAIpQLSc8CVqvhQJu-AcclIF6PCuwjL4YpQt4w0FchGSoutRkt58v4g/viewform). Join the judge table, meet other investors, and see what teams are building early. Founders need your experienced view. **For pitching startups:** Startups selected to pitch will present live on stage and receive feedback from investors. **After purchasing a ticket:** Please[ submit your pitch deck](https://docs.google.com/forms/d/e/1FAIpQLSchcZr9gCNJh0RLiKBgbdbDBKEOc-92LNySkzHf8qGPHg5Wpg/viewform) and ensure it is open for viewers. **Agenda** **19:00 – 19:30** **Registration** Guests register, receive badges, and event programs. This is an opportunity for casual networking, making first connections, and preparing for the event. **19:30 – 20:30** **Event Kickoff & Interactive Networking** Official welcome from the organizers with a brief overview of the event goals and schedule. Interactive networking helps participants set their objectives and connect with key contacts. **20:40 – 21:20** **Startup Pitch Session** Startups present their projects to investors and experts. Each team has 5 minutes to pitch, covering the project's core idea, business model, and target market. **21:20 – 22:00** **Chill & Networking** Participants enjoy casual conversations with investors, discuss collaborations, and exchange ideas over refreshments.

This is a ticketed event. Please register at [this link](https://luma.com/lpikw708). ​Ryan Faulkner explores various papers that address cooperation and safety in multi-agent LLM simulations. Some of the core topics will include: * ​Moral behaviour of agents in high-stakes, zero-sum, and morally charged social dilemmas * ​Governance and sanctioning dynamics and the ways that LLM agents often fail to cooperate and free-ride in common-pool resource game * ​Mechanism design interventions like mediation, contracts, and elected leadership are explored to steer agents toward safer outcomes. ​This research also reveals that LLMs adapt their behavior based on awareness of their conversational partner's identity. ​​​**Event Schedule** 6:00 to 6:30 - Food and introductions 6:30 to 7:30 - Presentation and Q&A 7:30 to 9:00 - Open Discussions ​​​​​​If you can't make it in person, feel free to join the live stream starting at 6:30 pm, via [this link](https://www.youtube.com/@Trajectory-Labs/live).

Eventbrite Link: **[https://www.eventbrite.ca/e/448735799857?aff=oddtdtcreator](https://www.eventbrite.ca/e/448735799857?aff=oddtdtcreator)** **Indulge in Wednesday wonders! Toronto's comedy sensation unfolds at 8 PM. Unwind with laughter in the heart of the week.** Step into a world of Wednesday wonders at 8 PM! Backroom Comedy Club invites you to a midweek escape filled with uproarious laughter and top-tier stand-up comedy. Join Toronto's finest comedians for an unforgettable evening of entertainment. Reserve your seat now and make your Wednesday delightful with humor, wit, and the best of the city's comedy scene!

Join us on March 26th for an exciting **AWS User Group Toronto meetup** focused on **AI-driven development with Kiro**! The evening kicks off with a presentation and live demoes showcasing how Kiro transforms the development workflow, followed by AWS experts sharing the best practices and approaches to get most out of AI-driven development. We'll wrap up with a hands-on workshop and Q&A session — Kiro credits will be provided for participants who want to explore at their own pace. As a bonus, enjoy pizza on us and take home some exclusive Kiro-themed swag! To make the most of the workshop, please come with Kiro pre-installed on your own computer and/or AWS account ready to go. **Agenda:** 6:00-6:15: Welcome Introductions, and community update 6:15-7:00: AI-driven development with Kiro - Presentation and Demo 7:00-7:30: Lessons from field - Best practices and accelerators 7:30-8:00: Workshop set and Q&A **Details:** Address: **18 York St., 7th Floor, Toronto, ON, M5J 2T8** Date: **March 26, 2026** Time: **6:00 pm to 8:00 pm EST** **Speaker:** * **Simran Singh** \- Sr\. Solutions Architect @ AWS * **Divya Jadav** \- Solutions Architect @ AWS * **Abhijith Ramesh Chandra** \- Solutions Architect @ AWS Please plan to arrive between 05:30 PM and 06:00 PM to ensure time to check-in, before the event begins at 06:00 PM. Visitors will need to present a government-issued photo ID to verify their identity and will have their picture taken to receive a visitor badge. Please wear your badge and remember to return all visitor badges to reception at the end of the visit. Parking is available onsite. There is a parking garage located beneath the building. You can pull an access ticket at the garage entrance off 120 Bremner Boulevard or Lower Simcoe Street. If you are arriving via the Union station, the building is conveniently located next to the Union station. Please enter through the main entrance on Bremner Boulevard or via the PATH Network and proceed to the elevators.

**SUBSCRIBE TO [THE MAILING LIST](https://torontorationality.beehiiv.com/). EVENTS ARE NO LONGER POSTED HERE.** ​Arguing about important things doesn’t usually lead to people changing their mind. Double Crux is a technique for making discussions more productive and understanding the actual reasoning of those who disagree with us. Sometimes it even helps to better understand the foundations of your own beliefs. Together, we'll learn about [Double Crux](https://www.lesswrong.com/posts/ya59PtGeYnCG25eWn/double-crux-in-a-box), and then break into pairs with someone we disagree with to practice finding out why our views are different and what might change our minds. ## Location Enter the Mars Atrium via University Avenue entrance. We'll meet at the food court in the basement. I'll be wearing a bright neon yellow jacket. ## Detailed Directions to the Food Court Enter from University Avenue and walk east until you see escalators. Take the escalators down. The food court is to the east of the escalators. If you are lost/confused, ask a security guard to direct you to the food court. [This event is cross-posted from LessWrong.](https://www.lesswrong.com/events/wuMwSJJEKZHfccoRs/toronto-acx-meetups-everywhere-spring-2025)

***Tickets must be purchased in advance!*** 🔗: [https://www.eventbrite.ca/e/toronto-hottest-content-creators-influencers-models-ugc-social-night-tickets-1984718070175?aff=ebdsoporgprofile](https://www.eventbrite.ca/e/toronto-hottest-content-creators-influencers-models-ugc-social-night-tickets-1984718070175?aff=ebdsoporgprofile) A fun social night for Toronto influencers & content creators—good vibes, great people, and endless content and create collaborations!

[Summary] This meetup is for those who are interested in code, web development, design, cloud, or AI. All levels are welcome, so feel free to bring your laptop and discuss what you are working on or what you are learning. You can share your projects and ideas with other participants freely. There are outlets and WiFi, drinks are about $5 for tea, they take card only. [Price] Attendance is FREE. But you need to buy something from the venue. [Policies] \- We do not tolerate harassment of our members \- We remind users that that this meetup is intended for networking and hobby development\, and any attempts at using this meetup event as a dating platform will not be not be tolerated Further information: https://torontostack.exchange/

Our coffee shop meetup now takes place every other Saturday. Come out to meet and chat with your fellow members of the Toronto Social Anxiety Support group in a supportive environment. **IMPORTANT: This group is intended to provide a safe space for people with social anxiety who may feel inhibited in louder, more extroverted environments. Please respect the nature of this group and do not attend if you are not in this category. There are many other groups available on Meetup.** **When**: 5pm - 7pm **Where to meet**: We're meeting at Alternity cafe. They are available as confirmed by the events coordinator Rezo. **Reminder**: Like all our events, the group's code of conduct applies. Pls make this a successful outing by being courteous and respectful in language and behaviour, and supportive towards other members, especially those with higher anxiety. **Covid/flu safety**: If you are sick or have recently been exposed to someone who is sick, pls use your judgement about attending this event. You can always come to the next event when you feel better.

Let’s do some coding together at a cafe! No more working alone in the weekend. Here, we write code together. And I mean together together. Not occupying-the-same-space-but-separate together. Here’s how it works: Jennifer brings her mobile app project, tells everyone that it is like Pinterest for recipes and she’d like to work on the nav bar. Paul and Chloe think Jennifer's project is fascinating, and they join the group. They gather around Jennifer’s laptop and work on the nav bar for 2 hours. Jennifer is the one typing out the code while Paul and Chloe research, brainstorm, and offer suggestions. If you’re feeling stuck on your own project or need a motivation boost, bring it to mob programming! Want to learn by watching how others code and solve problems? Join someone else’s project at this event! Oh and we love your half-done projects that you are a bit embarrassed to share. Absolutely bring those to the event! **Discord**: We use Discord to share screen & code snippets during the event. Also feel free to share your projects here before the event! https://discord.gg/yvAGbh4PpD **Event policy**: * We have 0 tolerance for harassment. * We don’t allow the projects that are not meant to be shared in public such as school assignments, interview tasks, or trade secrets. * The goal is to write code. We discourage you from pitching business ideas here, doing code reviews, or spending the whole event on planning what to do. * Please buy a drink, and tip the barista well.

Join your community of fellow Intuitives and MBTI nerds for a casual evening of engaging conversation. We get together every second Sunday – with a mix of regulars and new friends. There is no fee to attend, though we ask that you support the venue by ordering something to eat or drink. **Feel free to contact event host B. via Facebook/Meetup messenger, or text/call 416-712-8635 for directions**. About the venue: The Pint Public House Nearest Subway: Union Station Map / Directions: https://maps.app.goo.gl/G5GfXDSQXeifJ5ot5 We make an effort to find pubs that are quiet and introvert friendly, with a section to ourselves. We make no effort to muffle our extroverts, but should they get out of hand, our resident INTJ will use their death stare, to pull them back in line.

PLEASE NOTE: I HAVE CHANGED THE LOCATION TO SAFARI We are going to watch the Jays at Safari, which has a very cool vibe to it. Very trendy and upscale. There are pool tables and great food. A great way to make new friends and meet new people

**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

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!

**First meetup of the Columbus AI Engineering group.** We’ll kick things off with a practical, beginner-friendly discussion on: **How LLMs like ChatGPT actually work — and how to build real applications with them.** We’ll cover: * what’s actually happening under the hood (at a high level) * why LLMs behave the way they do (hallucinations, prompt sensitivity, etc.) * how people are building real systems with them today * where things break in practice This will be a **short, informal talk (\~15–20 min)** followed by open discussion and Q&A. Whether you’re an engineer, builder, or just curious about how modern AI systems work, you’re welcome to join. No slides, no fluff — just real conversation about real systems. We’ll hang out afterward and get to know each other.

The Humanist Monthly Program is our longest running event and still a community favorite. In the old days it used to be called "Going to HCCO" and we still like to think of it as our flagship event. We will be hearing from Becca Powell, Director of Advocacy and Outreach at Unchained At Last, an organization whose mission is dedication to ending forced and child marriage in the United States through direct services and systems change. Unchained At Last's mission clearly meshes and addresses several of our Humanist Ten Commitments. Becca will educate us about an issue many of us may not be familiar with--but should be. Food and drinks will be provided at the event. Feel free to show up a little bit early to hang out and talk. Going forward our meetings will be hybrid. You can meet us in-person or attend online Join Zoom Meeting [https://us02web.zoom.us/j/87836564953?pwd=4Mi57ElZkDIFlb1fnlNwOJ0NiOK4tP.1](https://us02web.zoom.us/j/87836564953?pwd=4Mi57ElZkDIFlb1fnlNwOJ0NiOK4tP.1) Meeting ID: 878 3656 4953 Passcode: 760812 One tap mobile +19292056099,,87836564953#,,,,\*760812# US (New York) +13017158592,,87836564953#,,,,\*760812# US (Washington DC) The formal presentation will start at noon

**New 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 topic suggestions and people interested in presenting at our monthly meetings. To this end we've set up a survey form at [https://docs.google.com/forms/d/15eBKF1nQQ2XS5gzD4rvhVRHMBEj7lJtHuA9wXupS3Uc](https://docs.google.com/forms/d/15eBKF1nQQ2XS5gzD4rvhVRHMBEj7lJtHuA9wXupS3Uc)

Jimmy V's Grill & Pub in Grandview Heights. You are responsible for your own meal/drinks. We usually don't have any agenda other than eat, drink and talk. :) If the weather is nice we will be on the back patio, otherwise we are in the cigar room. This group has been meeting every Tuesday evening for over a decade. Many attendees do not RSVP on meetup. Please don't let the small number here discourage you. Anyone/everyone is welcome to come. We'd love to have you join us. COTA bus #5 comes to W. 5th and Wyandotte Rd. And it's a minute walk to the restaurant. Did you know that there are atheists everywhere?!?! You may not know it, but we are! We're in your schools, diners, police force, military, government, and some are even still in your churches! So come and join us and meet other local atheists, along with agnostics, heathens, humanists, skeptics, and anyone else who's 'hell bound'! Vision: a Central Ohio that accepts atheism as a viable alternative in all areas of public and private life. Mission: grow, support, and provide community for atheists in Central Ohio. Social meetings held most Tuesdays at a local pub/restaurant at 7:00 PM (and often into the wee hours). Attendees call themselves agnostics, skeptics, humanists, non-theists, deists or even theists. All attendees are welcome but should support our vision. Atheists of Columbus (AoC) is part of Omnipresent Atheists (OA). AoC members are invited to join this OA meetup and/or OA Facebook group ( https://www.facebook.com/groups/omnipresentatheists/ ) but are free to continue conversations on the AoC Facebook group ( https://www.facebook.com/groups/columbusatheists/ ). AoC was founded in 2012 as a networking, social group for Central Ohio area humanists, skeptics, atheists, agnostics, nonbelievers, freethinkers, and the curious. It was a member of Columbus CoR and held weekly meetings, mostly on Fridays, for several years but then operated as an online only group for some time. In November 2018, Omnipresent Atheists (OA), a group that routinely meets on Tuesdays, invited AoC to merge. Omnipresent Atheists is a member of the Columbus Coalition of Reason (ColumbusCoR.org). Omnipresent Atheists is a member of the Columbus Coalition of Reason ( http://www.ColumbusCoR.org ). Omnipresent Atheists endorses the mission of the Secular Coalition for America ( http://secular.org ). This group has been meeting every Tuesday evening for over a decade. Many attendees do not RSVP on meetup. Please don't let the small number here discourage you. Anyone/everyone is welcome to come. We'd love to have you join us.

Central Ohio Radio Enthusiasts—CORE—is an informal community for anyone enthusiastic or curious about radio—whether you're new to radio and want to learn or you've been tinkering for years and want to share. Ham radio operators, GMRS users, Meshtastic fans, software-defined radio nerds, makers, and technical and non-technical folks are all welcome. No experience required or expected. This month we have **WiFi HaLow: Introduction and Practical Use** with **Alex Barbur**. Details are are [core.radio](https://core.radio).