Gunnar Grosch

PHP2Shell, a CA private key that was the number 4, Lambda Web Functions, unsandboxed Claude Code mods, and a trillion-parameter cat meme. Yells at Cloud ep. 4: The Vulnpocalypse. youtu.be/b6ZZKgCfirs

We opened Yells at Cloud ep. 3 by calling AI "super intelligence" as a joke. On Tuesday it became an executive order. Agencies now have to say "Super Intelligence" and "SI" instead of "AI." yellsatcloudpod.com/episodes/ep-3

Episode 3 is live. The labs want to slow down. Then they ship new models. The EU starts a 24-hour vulnerability clock. Everything is a harness now. DSQL gets foreign keys. AWS loses data for good. Super Intelligence, Artificial Slowdown. yellsatcloudpod.com/episodes/ep-3

In case you missed it: Episode 2 of Yells at Cloud is out. AI agents, AWS capacity limits, Amazon’s gas-powered Texas data center, Twitch scraping content, and CloudFormation Express Mode. The Slow Collapse of Civilization: yellsatcloudpod.com/episodes/ep-2

Got some new M5Stack toys this morning. Let's see what we can build out of these!

The .NET Durable Execution SDK went GA yesterday. Took the opportunity to verify all four SDKs. Java v2.0.0 updated withRetry. C# v1.0.0 added stepSemantics and tenant isolation. Both now supported. durable-viz 0.6.1 is feature complete across all four runtimes. github.com/gunnargrosch...

Before you write a line of application code, the Sinch CLI can rent you a number, make a live call, send a message, and stream webhook logs from a local tunnel. New post walking through all of it. dev.to/gunnargrosch... builder.aws.com/content/3Gx8...

Amazing event with the user group in Frankfurt! Can't go wrong with rooftop BBQ! So much fun catching up with friends new and old in the tech community. Thanks to Stefan Bauer and Manuel Vogel for organizing, to codecentric AG for hosting, and to everyone who listened to me rant. ❤️

@ajs.bsky.social thinks Lambda MicroVMs are AWS' most creative compute product in years: Firecracker VMs that restore from a snapshot in milliseconds. He breaks down the tech, pricing, and use cases on Yells at Cloud Ep. 1. yellsatcloudpod.com/episodes/ep-1

Episode 1 of Yells at Cloud is live. Lambda MicroVMs, CloudFormation Express Mode's lies, Cloudflare temp accounts, and why multi-agent teams underperform their smartest member. Generally Available on Spotify, Apple Podcasts & YouTube. yellsatcloudpod.com/episodes/ep-1

Annoyed at the giant sub navigation bar taking up a large portion of the screen on the AWS webpage? I've got you covered! Install this Tampermonkey script to have it automatically hide on page load. gist.githubusercontent.com/gunnargrosch...

Something's brewing. AWS Heroes arguing about cloud computing like it personally wronged them. Episode one in the works. Follow for more. yellsatcloudpod.com

durable-viz v0.4.1: dynamic step names across TS/Python/Java, Java nested generics, and Mermaid rendering fixes. npx durable-viz handler.ts --open github.com/gunnargrosch... #AWS #Serverless #OpenSource

Order confirmed. Alarm fired. Job finished. These are moments where SMS works best. Immediate, no app required, no filter. This post shows how to send SMS from Lambda using the official Sinch SDKs. Builder Center: builder.aws.com/content/3Eoz... DEV Community: dev.to/gunnargrosch...

Great evening in Athens! ​I talked about building conversational agents in code with AWS Lambda Durable Functions and the Sinch Conversation API. ​Thanks to Epignosis for hosting and the local AWS user group for organizing. ​#AWS #Serverless #AI #Sinch

Talked at AWS User Group Vienna last night about building conversational agents in code using Lambda Durable Functions and Sinch. Two live SMS demos: single-agent booking flow and a multi-agent coordinator. Really fun crowd.

Sending SMS is easy. Two-way conversations are more interesting. New post: webhook + two queues + three Lambda functions = a full SMS conversation loop on AWS. TypeScript and Python. DEV Community: dev.to/gunnargrosch... AWS Builder Center: builder.aws.com/content/3EY5... #AWS #Serverless #SMS

You sent an SMS. Did it arrive? Know whether your messages landed. Lambda Function URL + HMAC validation + Sinch Conversation API webhooks. TypeScript and Python. dev.to/gunnargrosch...

Speaking at AWS User Group Athens on June 4: Building conversational AI agents with Lambda Durable Functions and the Sinch Conversation API. Sequential code, human-in-the-loop callbacks, no Step Functions glue. RSVP: www.meetup.com/aws-user-gro...

I'm taking my kids to Seattle for vacation this summer (Jun 26-Jul 3)! Any of my Seattle friends have suggestions on what to do there with kids aged 9-12?

Hallo Wien! 🇦🇹 ​Excited to head to Vienna for the next AWS User Group meetup! ​I'm speaking on Building Conversational Agents in Code with AWS Lambda Durable Functions, orchestrating Amazon Bedrock agents using Sinch for inbound/outbound chat. ​RSVP: www.meetup.com/amazon-web-s...

Such a fun event with the AWS Community in the Nordics coming together in Stockholm for the yearly pre-Summit meetup! I talked about the importance of community and shared about my personal journey. Keep showing up!

Awesome event with Gothenburg Serverless tonight! Thanks to everyone who showed up and engaged! Lots of great conversations! A big thank you to the amazing speakers and to Cloud Enablers for hosting! Next event is yet to be scheduled. If you want to host, just let us know.

Starting today as the first Developer Advocate at Sinch. 700B+ texts and emails yearly. 100B+ calls. 160M+ active phone numbers. APIs for SMS, voice, WhatsApp, email, RCS, verification. If you've built with Sinch, I want to hear from you. What tripped you up? What's missing? DMs open.

Great day at AWS Community Day Bay Area Security Edition on Friday! Always great catching up with the Bay Area community and to hang out with fellow Heroes! My session on the security risks with MCP was hopefully an eye opener for many. Looking forward to the next one!

Thanks to everyone who joined yesterday's Gothenburg Serverless meetup and to Knightec Group for hosting! Next meetup on May 5 hosted by our friends at Cloud Enablers! Sign up to the group for notifications: www.meetup.com/gothenburg-s... #serverless #gothenburg

context.invoke() unlocks a pattern: one Lambda coordinator dispatching specialist agents as separate functions. Every call checkpointed, coordinator suspended while specialists run. dev.to/gunnargrosch... builder.aws.com/content/3BRI...

Gothenburg Serverless is back! Join us at Knightec in Lindholmen on April 7: - Spec-Driven Development for Serverless (Isak Holmdahl, Knightec) - Long-Running Serverless Workflows as Sequential Code (me) Food and drinks from 17:30. Space is limited: www.meetup.com/gothenburg-s...

Lambda Durable Functions: sequential code, checkpointed state, up to a year of execution. Zero compute during waits. Wrote about checkpoint/replay and built an AI support triage workflow with human-in-the-loop callbacks. dev.to/gunnargrosch... builder.aws.com/content/3B5i...

This game is so addictive!

Does your circuit breaker trip when it should? Do your retries back off or hammer a dead endpoint? failure-lambda 1.0: inject real failure conditions into any Lambda function to find out. dev.to/gunnargrosch... builder.aws.com/content/3Aqx... #aws #serverless #chaosengineering

DOOM runs on everything. Now AI coding assistants join the list. doom-mcp: an MCP server that lets Claude Code, Kiro, or Cursor play the actual DOOM engine. dev.to/gunnargrosch... builder.aws.com/content/3AmP...

I'll be in Amsterdam during KubeCon Europe week (March 23-26). Exploring what's next after 5+ years in DevRel at AWS. No ticket yet (hint hint), but around all week. Want to grab coffee and talk cloud native, AI, or dev experience? DM me! #KubeConEU #CloudNative

In-memory circuit breakers are silently useless on Lambda. Each environment tracks failures independently. With 50 concurrent environments and threshold 5, you need 250 failures before any circuit opens. dev.to/gunnargrosch... builder.aws.com/content/3Aj5...

New post: Multi-agent systems with RISEN prompts. The routing logic lives in the coordinator Steps section, not in code. Agents as tools, hooks for observability, routing eval with stubs. dev.to/gunnargrosch... builder.aws.com/content/3AXe...

New post: Lightweight evals for AI agent output quality. Structural checks, LLM-as-judge, calibration loop. RISEN prompts double as your eval spec. Runnable demo with two domains. dev.to/gunnargrosch... builder.aws.com/content/3ARU...

New post: RISEN (Role, Instructions, Steps, Expectation, Narrowing) turns vague system prompts into behavioral contracts for AI agents. Three scenarios with a runnable demo, including one with MCP tools. builder.aws.com/content/2cwk... dev.to/gunnargrosch...

After over five years at AWS, I'm part of the February layoffs. I've spent that time close to practitioners and the community, and that's what I'm looking for in what's next. Developer advocacy, DevRel, or community building. Longer post here: www.linkedin.com/posts/gunnar...

New post: Streaming Bedrock Responses Through API Gateway and Lambda ~500ms to first token instead of 8-10s. A side-by-side demo with the code and config to make it work. dev.to/gunnargrosch... builder.aws.com/content/3A9e...

New post: Building AI Agents in TypeScript with the Strands Agents SDK TypeScript support is in preview. A quick look at getting started: five examples from minimal agent to multi-tool orchestration. dev.to/gunnargrosch... builder.aws.com/content/3A55...

New post: Building the AWS Serverless Power for Kiro Built a Kiro Power with 25 MCP tools and ten steering guides for AWS serverless. Same expertise, different packaging. dev.to/gunnargrosch... builder.aws.com/content/3A1s...

New post: Turning AWS Serverless Experience into a Claude Code Plugin Encoded serverless expertise into skill guides so Claude makes the judgment calls that come from experience, not just documentation. builder.aws.com/content/39yk... dev.to/gunnargrosch...

New post: Extending Claude Code with Plugins and Skills for AWS Development Teach Claude your deployment process and security checks once. Skills are markdown files that replace repeated explanations. Plugins package them for your team. builder.aws.com/content/39vd... dev.to/gunnargrosch...

New post: Improving Your AWS Development Workflow on Claude Code with MCP Servers Seven MCP servers for AWS development. Query CloudWatch, design DynamoDB schemas, automate browser testing, and more. builder.aws.com/content/39tZ... dev.to/gunnargrosch...