Talk

Have you been struggling to set up network load balancing and managing web traffic in Kubernetes?

The Ingress API in Kubernetes seems to be too basic and not expressive enough to help you accomplish what you need. You may end up with many downstream implementation details in your configuration that are not portable. It gets even more complicated when you have developers, operators and network engineers working on the same shared configuration.

Cedar is an open-source language and software development kit (SDK) for writing and enforcing authorization policies for your applications.  Using Cedar, you can express fine-grained permissions as easy-to-understand policies enforced in your applications, allowing you to decouple access control from your application logic. In this session, we will introduce the core concepts behind the Cedar policy language and authorization engine, as well as how you can leverage this open source project to add access control into your applications.

Platform engineering, also known as an "Internal Developer Platform" aims to provide developers with a seamless and efficient environment to manage the entire lifecycle of an application. Django, a popular open-source web framework, is known for its rapid development capabilities and clean, pragmatic design. By leveraging its built-in features, one can expedite the process of developing platform engineering solutions. In this session, I will share my experience using Django for platform engineering at an AI company.

The COSCUP Booth Team is a newly established group this year, primarily responsible for setting up booths in various locations. You may wonder why this group was specifically formed and what it has accomplished since its establishment.

In this session, I will share the reasons behind my decision to establish this group, as well as the activities undertaken after its formation and the impact it has had on COSCUP.

This session will guide you through the process of building a comprehensive email subscription and delivery system, starting from domain and email configuration. We will discuss how to establish a subscription system, verify unique accounts, effectively manage subscriber lists, set up email tracking, create email templates, perform bulk sending, and avoid bouncebacks and related issues.

Ka-Cheong, the Director of Internet Society Hong Kong and an open-source contributor to AT Protocol and Farcaster, leads a discussion on the future of a decentralized social internet. Explore how these emerging protocols could replace traditional, capitalistic social networks like Twitter, and delve into the possibilities, challenges, and implications of such a transformation.

Key Topics:

AWS AI Assistant is a serverless applications and integrates most of the AWS AI/ML services and Open AI.
The most popular tech news in 2023 is the raise of generative AI with Large language models. With those powerful pre-built model or AI API, we can build a very powerful virtual assistant with the combination and integration of all AWS AI/ML services with OpenAI API or Hugging Face pre-trained model. For my use case, I hope my students learn and use AI but I do want to have certain control and monitoring. So, we want to make it fun and powerful for my students.

The Common Spatial Data Infrastructure (CSDI) is a key initiative under the Smart City Blueprint for Hong Kong. The CSDI portal launched by the Development Bureau (DEVB) provides a map-based digital infrastructure as a one-stop platform to open and share spatial data. By allowing members of the public to search, view and download various kinds of spatial data from the portal, a wide range of possibilities for application development will be opened, the digital economy boosted and quality of life improved.

In 2022, I launched a Kotlin podcast show, Kotlin Fireside Chat, with my friends in Kotlin User Group. Now, we're taking things to the next level by building a podcast website with a statistical analysis dashboard. We've built a static website using Jamstack and connected it to a serverless API written in Kotlin. In order to aggregate the listener number across platforms, such as YouTube, BiliBili, Ximalaya, Lizhi, Qingting, we've also created a crawler to grab those numbers and display them in a custom dashboard.

I want to talk about some interesting cases and tips that I met when using Postgres in my daily job, which are topics general enough that most developer may also meet in their daily jobs (even for non-Postgres developers).

• Why LIMIT 1 is MUCH SLOWER than LIMIT 100?
• What's wrong with JSONB? (hint: it's TOO robust)
• Efficient query using LATERAL subquery (from 8s to 0.08s)