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You are thinking about serverless costs all wrong

You are thinking about serverless costs all wrong

The Register published an article right before Christmas 2018. It had a somewhat provocative title, and somehow it ended up in my inbox…
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Yan Cui
All my posts on Serverless

All my posts on Serverless

Tips for writing Lambda functions
Go to the profile of Yan Cui
Yan Cui
We can do better than percentile latencies

We can do better than percentile latencies

Years ago, I used aver­age laten­cy on every dash­board and every alarm. That is, until I woke up to the prob­lems of aver­age laten­cies…
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Yan Cui
Latest Posts
How to implement Durable Execution for Lambda (without frameworks)

How to implement Durable Execution for Lambda (without frameworks)

“Durable Execution” means a system can execute workflows reliably and remember progress even when failures occur. It typically involves:
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Yan Cui
How we built an AI code reviewer with serverless and Bedrock

How we built an AI code reviewer with serverless and Bedrock

I recently helped a client launch an AI code reviewer called Evolua [1]. Evolua is built entirely with serverless technologies and…
Go to the profile of Yan Cui
Yan Cui
EventBridge best practice: why you should wrap events in event envelopes

EventBridge best practice: why you should wrap events in event enve...

When it comes to building event-driven architectures on AWS, EventBridge has become the de facto service for ingesting, filtering…
Go to the profile of Yan Cui
Yan Cui
Fine-grained access control in API Gateway with Cognito access token and scopes

Fine-grained access control in API Gateway with Cognito access toke...

In security and access control, authentication and authorization are two distinct yet interconnected concepts.
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Yan Cui
Is it safe to use ID tokens with Cognito authorizers?

Is it safe to use ID tokens with Cognito authorizers?

A common narrative is that one should always use access tokens to call your APIs, while ID tokens are strictly for identifying users.
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Yan Cui
Fine-grained access control in API Gateway with Cognito groups & Lambda authorizer

Fine-grained access control in API Gateway with Cognito groups & La...

In security and access control, authentication and authorization mean two distinct but related things.
Go to the profile of Yan Cui
Yan Cui
What’s the best way to do fan-out/fan-in serverlessly in 2024?

What’s the best way to do fan-out/fan-in serverlessly in 2024?

Back in 2018, I shared [1] several ways to implement fan-out/fan-in with Lambda. A lot has changed since, so let’s explore the solution…
Go to the profile of Yan Cui
Yan Cui
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