Yan Cui
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theburningmonk.com
Yan Cui
@theburningmonk.com
I help engineers build better software faster with serverless | AWS Serverless Hero

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TIL web neural network API, an emerging web standard for building in-browser AI apps that lets you use those new NPUs in phones and laptops.

w3.org/TR/webnn
July 10, 2025 at 10:38 AM
Reposted by Yan Cui
I have not paid a ton of attention to the uproar over RTO policies, bc we are all in on distributed teams and not going back.

My impression (via social media) has been that these were shadow layoffs.

Last month I asked an investor why they are doing RTO. He said: "Retention, mostly. And morale."
May 26, 2025 at 11:13 PM
Dude, this is amazing and thank you so much for your support over the last 12 months!
May 15, 2025 at 6:21 PM
I've been diving into Neon and I like what I see!

Here's how you can use Neon with ephemeral environments to simplify serverless development.

theburningmonk.com/2025/04/how-...
How to use Neon and ephemeral environments to simplify serverless development
Understand the value of ephemeral environments, and how you can use Neon and ephemeral environments to simplify serverless development
theburningmonk.com
May 2, 2025 at 9:50 PM
Saying "coding is dead" is missing the point. Coding isn’t just about producing code, it’s also a way of thinking.

It teaches us structure, systems thinking, abstractions and problem decomposition.

If you don’t learn those skills, AI won’t make you productive, it’ll make you dependent.
April 11, 2025 at 7:27 AM
I finally binged The Orville, it was time well spent, especially seasons 2 and 3!

So high on Star Trek nostalgia right now 😅
April 7, 2025 at 6:51 PM
I recently spoke with Waldemar Hummer to find out what's new in LocalStack v4 - e.g. visualize and trace event-driven arch end-to-end, or create snapshots of your system.

It's crazy how fast they are innovating!

youtu.be/vVUBnXD6eto
Introducing LocalStack v4
YouTube video by Master AWS with Yan
youtu.be
April 2, 2025 at 7:09 PM
:-P
March 27, 2025 at 5:43 PM
Through chaos experiments, the Lambda team reduced response time to an AZ outage by 90%! 🤯
March 27, 2025 at 10:30 AM
"Lambdaliths have slower cold starts"
"Lambdaliths have fewer cold starts"

Both can be true, but neither is entirely correct. It depends on several factors.

In my new post, I explain these nuances so you can make a better choice.

theburningmonk.com/2025/03/the-...
The pros and cons of Lambdalith
Learn about lambdalith and how it helps you build serverless APIs with AWS Lambda, as well as its pros and cons.
theburningmonk.com
March 27, 2025 at 12:23 AM
I spoke with Khawajas Shams about building large-scale (think millions of TPS) multi-tenant systems.

We talked about pros & cons of cell-based architectures, how it reduces the blast radius, and techniques for building high-throughput systems e.g. core pinning

www.youtube.com/watch?v=8jte...
How to Build a Multi-Tenant System (Best Practices)
YouTube video by Master AWS with Yan
www.youtube.com
March 12, 2025 at 7:23 AM
Nice to see a full house at the serverless days Manchester 💪
February 20, 2025 at 10:11 AM
Thank you to everyone who attended my talk at the Serverless London meetup last night 🙏

Here are my slides for those who couldn't make it.

You can try Evolua for free at evolua.io. We'd appreciate your feedback!

speakerdeck.com/theburningmo...
How we built an AI code reviewer with serverless and Bedrock
Slides for my talk at the Serverless London meetup on 12-Feb-2025
speakerdeck.com
February 13, 2025 at 12:29 PM
New post: How we built an AI code reviewer with serverless and Bedrock

My biggest lesson learnt is that, at least for our use case, LLM is the easy part and there's still a lot of "app" in an "AI-powered app"!
How we built an AI code reviewer with serverless and Bedrock
Explore the high-level architecture of Evolua, an AI code reviewer built with Bedrock and serverless technologies, and what we learnt
buff.ly
January 31, 2025 at 9:16 AM
Wiz found a publicly accessible ClickHouse database linked to DeepSeek, completely open and unauthenticated, exposing sensitive data like chat history 🤦‍♂️

www.wiz.io/blog/wiz-res...
Wiz Research Uncovers Exposed DeepSeek Database Leaking Sensitive Information, Including Chat History | Wiz Blog
A publicly accessible database belonging to DeepSeek allowed full control over database operations, including the ability to access internal data. The exposure includes over a million lines of log str...
www.wiz.io
January 30, 2025 at 11:31 AM
I spoke with the co-founder of @hookdeck.com to find out what it can do, and it's impressive!

There is a lot of focus on DX for building Event-Driven Architecture, and EventBridge can learn a lot from them.

Have a look for yourself.

www.youtube.com/watch?v=-jmM...
Hookdeck has built a better Developer Experience than EventBridge
YouTube video by Yan Cui
www.youtube.com
January 29, 2025 at 10:53 PM
AWS Hero status renewed for another two years 😇

aws.amazon.com/developer/co...
Yan Cui | AWS Serverless Hero
Connect with Yan Cui, experienced engineer, AWS user since 2009, and frequent author of serverless-focused topics.
aws.amazon.com
January 29, 2025 at 2:32 PM
This is AWESOME!!

EventBridge now delivers events to cross-account targets directly without having to send them to the default bus in the target account first.

More details here:
aws.amazon.com/about-aws/wh...
January 22, 2025 at 12:38 AM
Here's a mindmap of everything we'll cover in my 4-week boot camp starting on Monday.

Are we missing anything that one should know for running serverless workloads in production?

Detailed curriculum here: productionreadyserverless.com#curriculum
January 18, 2025 at 6:48 PM
We're back with a new episode of real-world serverless.

I spoke with @boyney123.bsky.social about the hard parts of building event-driven architectures and how EventCatalog can help with event documentation, discovery, versioning, visualization and testing.

www.youtube.com/watch?v=ZVl7...
EventCatalog REVOLUTIONIZES Governance in Event-Driven Architectures | ft. David Boyne
YouTube video by Yan Cui
www.youtube.com
January 17, 2025 at 3:10 PM
did he say what caused the spike?
January 17, 2025 at 8:45 AM
Thank you 🙏
January 11, 2025 at 8:38 AM
oh, this is a toughie...
January 10, 2025 at 9:53 PM
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January 10, 2025 at 8:26 AM
You can also put CloudFront in front of your API and cache and handle these preflight requests at a lower cost. This doesn’t eliminate preflight request-related charges entirely, but it goes a long way to minimize it.
January 10, 2025 at 8:26 AM