MongoDB

Argentine Tango Beginner Class The best place to start your Tango dance journey. Suitable for pure beginners. No partner required. Mingle with the largest beginner community. We believe the community is an important factor to new dancers. **Class is confirmed 👍🏻** Fee : $20

We had a badminton session at **Braddell Heights Community Club, behind NEX Shopping Mall,** on Tuesday night **19th May 2026**. Welcome all High Beginner and Low Intermediate players to join us for some badminton work out. * 7:30pm - 9:30pm * High Beginner and Low Intermediate Players. * Court 2 * 2 hours per session * S$10 per session * Shuttles provided (RSL Supreme) * Location: 50 Serangoon Avenue 2, #01-01, Singapore 556129 * Do join us if you are available.

**Come along to a friendly game of 5 a Side Football @ Civil service club rooftop 60 Tessemsohn Road 1-hour game** The game is 15SGD per pax for 1 hour, 15SGD is non-refundable if you don't play for any reason. Please RSVP in to book your playing slot now. After you RSVP one of the organisers will reach out to you to confirm your attendance and collect payment. If you do not reply you will be removed from the list so please check your meetup messages

Hello Gophers! Our **Ultimate Practical AI** workshop will be held on **21 May 2026**, before our GopherCon Singapore 2026 conference. You can buy tickets for the conference and this workshop at our [GopherCon Singapore 2026 website](https://2026.gophercon.sg). Workshop description follows: This is a hands-on, full-day workshop where you'll build a complete AI-powered application in Go — from first prompt to production-ready system. You'll start by connecting your Go application to a language model and grounding its responses in real data using Retrieval-Augmented Generation (RAG). Then you'll give it the ability to act on the world through Tool Calling, Function Execution, and the Model Context Protocol (MCP). With the core system working, you'll learn the advanced optimization techniques that separate prototypes from production — speculative decoding, semantic caching, and intelligent model routing. Finally, you'll harden everything against the security threats unique to LLM-powered systems, from prompt injection to data exfiltration. Each part builds on the last. By the end of the day, you won't just understand these concepts — you'll have built, optimized, and secured a working system that retrieves, reasons, and acts. ### Full Curriculum #### What a Student Is Expected to Learn By the end of this workshop, you'll leave with working code, a production-ready mindset for AI-powered Go applications, and hands-on experience across the full stack: retrieval, action, performance, and security. 🚀 ##### Part 1: Ground It — Retrieval-Augmented Generation (RAG) in Go * **Understanding RAG Concepts** – Improve responses by dynamically retrieving relevant context rather than relying solely on static training data. * **Ingesting and Processing Documents** – Build pipelines to index and retrieve documents from client systems. * **Interacting with AI-Compatible APIs** – Learn how Go applications can connect to local inference engines, OpenAI-compatible servers, or cloud AI services. * **Optimizing Performance & Latency** – Implement caching, batching, and parallel processing to enhance efficiency. * **Using Vector Databases** – Store and search embeddings with tools such as Chroma, Pinecone, Weaviate, Milvus or pgvector in PostgreSQL. ##### Part 2: Make It Act — Tool Calling, Function Execution & MCP in Go * **How AI Uses Tool Calling** – Enable external system control by allowing AI to invoke predefined functions in Go. * **Building Function Calls with OpenAI-Compatible Systems** – Define structured function inputs and outputs for AI-driven interactions. * **Connecting to External APIs & Databases** – Trigger real-world actions, query databases, and automate workflows. * **Handling Responses & Errors** – Ensure safe and reliable execution of AI-invoked functions. * **Introduction to the Model Context Protocol (MCP)** – Understand how MCP standardizes the way models discover and invoke tools. Build a simple MCP server in Go that exposes tools to any MCP-compatible client, showing how it compares to direct function calling. ##### Part 3: Make It Fast — Advanced Optimizations * **Speculative Decoding** – Use a smaller draft model alongside a larger verification model to get near-large-model quality at small-model speeds. Applicable to both local inference libraries and serving engines that support it natively. * **Automatic Prefix Caching & KV Cache Reuse** – Structure multi-turn conversations so shared prefixes (system prompts, conversation history) are cached and reused across requests, avoiding redundant computation. Manage message arrays carefully to keep prefixes stable across turns. * **Semantic Caching** – Embed user queries and check vector similarity against cached query-response pairs, returning cached answers for semantically equivalent questions without running inference — implementable in Go with any embedding model or API. * **Adaptive Retrieval** – Use a lightweight classifier or a small local model to decide whether RAG context is needed at all, avoiding irrelevant context injection that can degrade response quality. * **Cascading Model Routing** – Route queries to different models based on complexity: a fast small model for simple questions, escalating to a larger model only when confidence is low, implemented as Go middleware. ##### Part 4: Lock It Down — Securing LLM-Powered Go Applications * **Prompt Injection Defenses** – Understand direct and indirect prompt injection attacks, and implement role separation, input sanitization, and detection strategies. Demonstrate how injected instructions in user input or retrieved documents can hijack model behavior. * **Securing Tool Calls** – Apply least-privilege principles to exposed functions, prevent command injection from model output, and enforce authorization checks before execution. * **RAG Pipeline Security** – Guard against data poisoning and indirect injection via ingested documents. Show how a malicious document in the vector DB can manipulate retrieval results and model responses, and defend with access controls, relevance thresholds, and content isolation. * **Output Sanitization & Exfiltration Prevention** – Sanitize model-generated content before rendering in web UIs to prevent XSS. Defend against data exfiltration where the model encodes sensitive retrieved data into tool call arguments targeting attacker-controlled endpoints, using domain allowlists and egress filtering. * **Chain-of-Call Escalation** – Show how a model can chain multiple tool calls in a single turn to escalate privileges. Implement call budgets, supervision layers, and human-in-the-loop checkpoints in Go.

**GopherCon Singapore 2026** **ANNOUNCEMENT – Tickets via [website](https://2026.gophercon.sg/) only.** The international Go programming language conference for Singapore and Southeast Asia is back. GopherCon Singapore 2026 will be held on **20 to 22 May 2026**. We are very excited to once again meet like-minded Go developers from Singapore, other parts of South-East Asia, and the rest of the world. Keep a lookout on the website for our speakers and agenda update. You can still sign up for the conference or a conference + workshop. Sales are happening fast. *The end time at 10pm takes into account the After-party Event which will take place after the conference at a venue which will be made known soon. Attendees will need to show their conference passes for the After-Party event.* See you there! Cheers! GoSG for GopherConSG 2026

We had a badminton session at **Potong Pasir Community Club** on Saturday **23th May 2026**. Welcome all High Beginner and Low Intermediate players to join us for some badminton work out. * 2:30pm - 4:30pm * High Beginner and Low Intermediate Players. * Court 1 and Court 2 * 2 hours per session * S$10 per session * Shuttles provided (RSL Supreme) * Location - 6, Potong Pasir Avenue 2, 358361at

Hello Gophers! Our **Build Your Own Macropad: From Soldering to Software** workshop will be held on **20 May 2026**, before our GopherCon Singapore 2026 conference. All attendees will require a separate ticket, as a keyboard kit will be provided for you to take home. You can buy tickets for the conference and this workshop at our [GopherCon Singapore 2026 website](https://2026.gophercon.sg). Workshop description follows: In this hands-on workshop, you'll go from a pile of parts to a fully functional, custom macropad. The morning is dedicated to soldering your hardware, and the afternoon is all about bringing it to life using TinyGo. A proven experience from Japan — the TinyGo Keeb Tour has successfully hosted 10 events across various cities since 2024, helping participants build their own zero-kb02 keyboards. Now, they're bringing this experience to Singapore! New to soldering? No problem! The team will be right there to guide you through every step. There are plenty of spare parts, so there's no need to worry about making mistakes — it's all part of the learning process. ### Full Curriculum #### Meet the zero-kb02 The zero-kb02 isn't just a simple keypad — it's a powerful, programmable controller designed for versatility. You'll be building and coding with: * **Brain:** Powered by the RP2040 microcontroller * **Controls:** 12 keys for your favorite shortcuts * **Interaction:** A Joystick and a Rotary Encoder for intuitive navigation * **Visuals:** An OLED Display and RGB LEDs to show status and add flair #### Endless Possibilities with TinyGo Beyond a simple keypad, the zero-kb02 is a gateway to embedded development. With the extensive documentation and the power of TinyGo, you can transform it into: * **Musical Instruments:** Create a buzzer-based synth or a MIDI controller * **Gadgets:** Build a weather station using I2C sensors and the OLED display * **Gaming:** Run 2D games using koebiten (a TinyGo-friendly subset of Ebitengine) * **Fully Customizable Keyboard:** It's Vial-compatible, allowing you to remap keys and change settings directly from your web browser #### Morning: Soldering Workshop You'll assemble your own zero-kb02 from scratch — soldering the RP2040 microcontroller, keys, joystick, rotary encoder, OLED display, and RGB LEDs. Expert staff will guide you through every step. #### Afternoon: Programming with TinyGo With your macropad assembled, you'll bring it to life with TinyGo firmware. Learn how to program key mappings, control the OLED display, drive RGB LEDs, and read the joystick and rotary encoder — all in Go. By the end of the day, you'll leave with a custom keyboard that you built and programmed yourself. See you there! Cheers, GoSG for GopherConSG 2026

**About This Group** This group is perfect for 1. **Beginner guitarists** who love singing and playing music in a group 2. **Sing-along enthusiasts** who don’t play the guitar but enjoy singing to live music **Who’s a Beginner Guitarist?** If you’ve been playing guitar for less than 12 months and are familiar with basic chords like G, C, D, Em, Am, and A—you’re in the right place. **Singers Welcome!** As long as you enjoy singing and can carry a simple tune, you’re absolutely qualified. No experience required—just bring your voice and your enthusiasm! We’ll also share tips and ideas to help each other improve our guitar skills in a fun and supportive environment. **Come for the Music—Stay for the Community** Expect laughter, learning, and meaningful connections with fellow music lovers. **Important Note:** While we meet at a church venue, this is *not* a religious or church-based group. People of all beliefs and backgrounds are welcome. ***COMPILATION OF OUR JAM SONGS:*** [https://drive.google.com/open?id=1Aw-MuvPHAhU23DhncMBcYK_17TgIqhKH](https://drive.google.com/open?id=1Aw-MuvPHAhU23DhncMBcYK_17TgIqhKH) ***LOAN OF GUITARS :*** \> We have 10\-15 guitars to loan out for the session\. First come\, first served basis\. ***FREQUENCY OF THE JAM SESSIONS*** : \> The jam takes place fortnightly on the 2nd & 4th Wednesday of each month\. ***REGISTRATION:*** \> Entry into the venue is STRICTLY by registration ONLY\. \> No walk\-in will be entertained\.

Hello Gophers! Our **Hardware Hacking with TinyGo** workshop will be held on **20 May 2026**, two days before our GopherCon Singapore 2026 conference. Conference ticket holders (excluding some promotional tickets) can attend this workshop for free. You can buy tickets for the conference at our [GopherCon Singapore 2026 website](https://2026.gophercon.sg). Workshop description follows: Get ready for an electrifying experience at GopherCon with the Hybrid Group's epic robot-fest session, powered by Go. Dive into drone control via joystick, reunite with our trusty pal GopherBot, and immerse yourself in more IoT wonders than you can handle! We are bringing a special collection of our favorite programmable robots and toys for you to play with and code, including some retro favorites and a few new friends. If music is your jam, don't miss the TinyGo Jam session! Rock out with TinyGo-powered MIDI controllers and enjoy a variety of self-guided musical activities to keep your earbuds delighted.Nt

Hello Gophers! Our **Ultimate Software Design and Engineering** workshop will be held on **20 May 2026**, before our GopherCon Singapore 2026 conference. Ardan Labs' popular Ultimate Software Design class is back for probably the final year! We've specially requested for William Kennedy to continue teaching this class, because we believe that strong fundamentals would be even more necessary than ever in the age of AI. You can buy tickets for the conference and this workshop at our [GopherCon Singapore 2026 website](https://2026.gophercon.sg/). Workshop description follows: This class teaches you how to engineer production-level software in Go leveraging the power of a domain-driven, data-oriented architecture that can run in Kubernetes. From the beginning, you will pair-program and read code with the instructor as he walks through the design philosophies and guidelines for engineering software in Go. With each new feature that is discussed, you will learn how to think about, read, maintain, manage, and debug code. The core of this class is to teach you how to handle and reduce the spread of complexity in the systems you are building. If one of your biggest challenges is maintaining consistent coding standards across your codebase, maybe because team members have different levels of Go experience and are coming from different programming backgrounds, this course is for you. You will learn a set of idiomatic coding standards that everyone can adopt and apply to your existing projects. #### What a student is expected to learn: ##### Deploy First Mentality: We begin to focus on service design with a focus on the ability to maintain, manage, and debug the service in Kubernetes. * Design Philosophy, Guidelines, What to Expect * Project Layers, Policies, and Guidelines * Prepare Project ##### Domain-Driven, Data-Oriented Architecture: We talk about the data-driven, data-oriented architecture. We discuss the design philosophy, guidelines, and semantics of how the three layers of App, Business, and Storage work together. * Architecture Review * Applying and Implementing Firewalls * Data Flow Trust vs Non-Trust * Data Shaping and Data Validation * Developer Isolation with Domains * Extending Functionality through Composition

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

Start your week the right way with Manic Mondays. Giving you an enjoyable Bachata lesson with a push of cool moves. The second hour has Beginner/Intermediate Salsa on 1. You must understand basic Salsa skills to participate. 730pm-830pm Bachata Cool Moves 830pm-930pm Salsa On 1 (Beginner/Intermediate) 15 for One Class 20 for Both Free Parking & Plenty of Dance Space. Viva Dance Columbus 2809 Festival Lane Dublin OH 43017

**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

We will show how to build custom agents with Microsoft Agent Framework. Attendees will learn how to build and custom host agents when Microsoft Foundry is not a viable option.

**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