Stefan Olaru

@stefanolaru

Head of Development | Architect | 7x AWS Certified | AWS Community Builder | Serverless

Joined July 2021

About

An architect by trade, practicing architecture in the Cloud. 7x AWS Certified, AWS Community Builder, Serverless advocate, Vue enthusiast.

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Stefan Olaru's blogs

Stefan Olarublog.stefanolaru.com19 posts

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Recently published

SOStefan Olarublog.stefanolaru.comSep 19, 2025 · 5 min read

Streaming AI Responses on AWS Lambda

While building Creditaki, an AI-powered credit assistant, I had two non-negotiable requirements: a fully serverless architecture and real-time streaming for the best user experience. Users expect AI responses to appear token by token, like ChatGPT. B...

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SOStefan Olarublog.stefanolaru.comFeb 23, 2024 · 3 min read

Debugging AWS SES templates

AWS SES is extremely powerful but it's likely surpassed only by AWS Cognito in terms of opacity and debugging difficulty. It usually works, but when it doesn't, it's a time-sink. I've been working on migrating a client's on-premise shopping cart solu...

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SOStefan Olarublog.stefanolaru.comNov 14, 2023 · 7 min read

Exporting RDS Snapshots to Athena using Step Functions

A recent challenge I had on a project was enabling access to a production MySQL database on Amazon RDS, mostly for data analytics purposes. The requirement was to run ad-hoc SQL queries for periodic analytics reports and extract data to populate some...

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SOStefan Olarublog.stefanolaru.comMar 28, 2023 · 9 min read

Run Lambda functions with fixed IP

A Lambda function runs in its own container and when invoked, the external requests to 3rd-party services will appear as coming from various IP addresses. This becomes a problem when our Lambda function needs to communicate with IP-restricted access ...

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SOStefan Olarublog.stefanolaru.comMar 8, 2023 · 5 min read

Scalable webhook listeners in AWS

Traditionally, when we think about loose coupling and serverless in AWS, it's an API Gateway endpoint triggering a Lambda function that sends messages into SQS. But API Gateway directly integrates with a handful of other AWS APIs, and SQS is one of t...

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Stefan Olaru

About

Available for

Stefan Olaru's blogs

Recently published

Streaming AI Responses on AWS Lambda

Debugging AWS SES templates

Exporting RDS Snapshots to Athena using Step Functions

Run Lambda functions with fixed IP

Scalable webhook listeners in AWS

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Stefan Olaru

About

Available for

Stefan Olaru's blogs

Recently published

Streaming AI Responses on AWS Lambda

Debugging AWS SES templates

Exporting RDS Snapshots to Athena using Step Functions

Run Lambda functions with fixed IP

Scalable webhook listeners in AWS