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Sascha Mirow-Stanitzok

Team lead Middleware at freenet. Building serverless systems on AWS since the early days: Serverless Framework, CDK, TypeScript, Lambda and event-driven design. Hands-on guides at sascha-ms.de

Location Büdelsdorf, Germany Joined Joined on  Personal website https://sascha-ms.de/en

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Team Lead Middleware at freenet

Prompt Injection in MCP: Securing Lambda Tools
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Prompt Injection in MCP: Securing Lambda Tools

#aws #mcp #security #serverless
1
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18 min read

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Stay interview: a guide with questions for leaders
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Stay interview: a guide with questions for leaders

#career #leadership #management
1
Comments
12 min read
Step Functions agent tools via AgentCore Gateway
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Step Functions agent tools via AgentCore Gateway

#agents #ai #aws #mcp
1
Comments
16 min read
EventBridge Scheduler time zone: cron at local time
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EventBridge Scheduler time zone: cron at local time

#aws #serverless #tutorial #typescript
1
Comments
16 min read
Temporal API in TypeScript: deadlines and time zones
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Temporal API in TypeScript: deadlines and time zones

#aws #javascript #node #typescript
1
Comments
17 min read
Node.js 26 LTS: planning the Lambda upgrade
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Node.js 26 LTS: planning the Lambda upgrade

#aws #javascript #node #serverless
1
Comments
18 min read
GitHub Actions lockfile: pin your workflows safely
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GitHub Actions lockfile: pin your workflows safely

#cicd #devops #github #security
3
Comments 4
16 min read
Copilot Assisted Permissions: a safe setup
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Copilot Assisted Permissions: a safe setup

#agents #ai #github #security
1
Comments
13 min read
Webhook retries: reliable delivery with SQS and Lambda
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Webhook retries: reliable delivery with SQS and Lambda

#architecture #aws #backend #serverless
1
Comments 1
22 min read
Offboarding checklist: when someone leaves the team
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Offboarding checklist: when someone leaves the team

#career #leadership #management #productivity
1
Comments
11 min read
Identity Center EventBridge: automate offboarding
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Identity Center EventBridge: automate offboarding

#automation #aws #security #serverless
1
Comments
18 min read
SOCI lazy loading: start Lambda containers faster
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SOCI lazy loading: start Lambda containers faster

#aws #containers #performance #serverless
1
Comments
17 min read
Monitoring durable functions: telemetry in TypeScript
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Monitoring durable functions: telemetry in TypeScript

#aws #monitoring #serverless #typescript
1
Comments
16 min read
AgentCore CLI 1.0: Deploy an AI Agent with TypeScript
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AgentCore CLI 1.0: Deploy an AI Agent with TypeScript

#ai #aws #cli #typescript
1
Comments
14 min read
DynamoDB TTL: build seat holds that expire
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DynamoDB TTL: build seat holds that expire

#architecture #aws #database #serverless
1
Comments
17 min read
Remote onboarding checklist: the first 30 days
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Remote onboarding checklist: the first 30 days

#career #management #remote
Comments
10 min read
Test Step Functions with the TestState API
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Test Step Functions with the TestState API

#api #aws #cloud #testing
1
Comments
15 min read
Saga pattern with Step Functions: rolling back cleanly
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Saga pattern with Step Functions: rolling back cleanly

#architecture #aws #serverless
1
Comments 1
18 min read
Strangler Fig Pattern: Migrate to Lambda Step by Step
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Strangler Fig Pattern: Migrate to Lambda Step by Step

#architecture #aws #serverless
1
Comments
18 min read
REST API vs HTTP API: Choosing API Gateway
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REST API vs HTTP API: Choosing API Gateway

#api #architecture #aws #serverless
1
Comments
19 min read
Evaluating AI agents: small evals in TypeScript
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Evaluating AI agents: small evals in TypeScript

#ai #testing #tutorial #typescript
1
Comments
25 min read
EventBridge replay: Reprocess events after a bug fix
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EventBridge replay: Reprocess events after a bug fix

#architecture #aws #serverless #tutorial
1
Comments
19 min read
Lambda authorizer for HTTP APIs: validate API keys
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Lambda authorizer for HTTP APIs: validate API keys

#api #aws #serverless #typescript
1
Comments
19 min read
npm minimum release age: a cooldown for dependencies
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npm minimum release age: a cooldown for dependencies

#tooling #javascript #node #security
2
Comments
18 min read
Leading remote teams: rituals that actually work
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Leading remote teams: rituals that actually work

#leadership #management #remote
1
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12 min read
Run an MCP Server on Lambda: A TypeScript Guide
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Run an MCP Server on Lambda: A TypeScript Guide

#aws #serverless #typescript #tutorial
1
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19 min read
Lambda Destinations: Catch Failed Async Events
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Lambda Destinations: Catch Failed Async Events

#tutorial #aws #serverless #backend
1
Comments
15 min read
Levels of delegation: a guide with a delegation board
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Levels of delegation: a guide with a delegation board

#agile #leadership #management
1
Comments
11 min read
Exponential backoff with jitter: retries in TypeScript
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Exponential backoff with jitter: retries in TypeScript

#typescript #architecture #programming #aws
1
Comments
17 min read
Lambda circuit breaker: contain slow third-party APIs
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Lambda circuit breaker: contain slow third-party APIs

#typescript #architecture #aws #serverless
1
Comments
21 min read
Bedrock prompt caching: cut Claude costs with TypeScript
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Bedrock prompt caching: cut Claude costs with TypeScript

#typescript #aws #llm #ai
2
Comments 3
19 min read
Zod in Lambda: Validation, Types and OpenAPI From One Schema
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Zod in Lambda: Validation, Types and OpenAPI From One Schema

#lambda #typescript #aws #api
1
Comments
15 min read
What is a skip-level meeting? Guide, agenda, questions
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What is a skip-level meeting? Guide, agenda, questions

#career #leadership #management
1
Comments
11 min read
Migrate to Serverless Framework v4: a step-by-step guide
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Migrate to Serverless Framework v4: a step-by-step guide

#aws #serverless #tutorial
1
Comments
13 min read
Fan-out with SNS and SQS: One Event, Many Consumers
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Fan-out with SNS and SQS: One Event, Many Consumers

#aws #architecture #tutorial #serverless
1
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18 min read
Serverless Framework vs CDK vs SST: my pick for 2026
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Serverless Framework vs CDK vs SST: my pick for 2026

#aws #architecture #serverless #infrastructure
1
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13 min read
Serverless & AI in brief: week 43/2026
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Serverless & AI in brief: week 43/2026

#news #aws #ai #serverless
1
Comments
8 min read
Outbox pattern with DynamoDB Streams and EventBridge Pipes
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Outbox pattern with DynamoDB Streams and EventBridge Pipes

#architecture #aws #database #serverless
Comments 2
22 min read
Splitting pull requests: small PRs without waiting
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Splitting pull requests: small PRs without waiting

#git #productivity #softwareengineering
Comments 2
15 min read
SQS and EventBridge with Lambda: Decouple a Guestbook
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SQS and EventBridge with Lambda: Decouple a Guestbook

#architecture #aws #serverless
Comments
23 min read
Code Review Feedback: Comments That Land
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Code Review Feedback: Comments That Land

#career #leadership #softwareengineering
Comments
14 min read
How to write tool descriptions for AI agents
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How to write tool descriptions for AI agents

#agents #ai #llm #mcp
5
Comments 14
18 min read
Asynchronous API with Lambda: job pattern with 202 and SQS
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Asynchronous API with Lambda: job pattern with 202 and SQS

#api #architecture #aws #serverless
Comments 2
22 min read
Build an MCP server in TypeScript: step by step with SDK v2
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Build an MCP server in TypeScript: step by step with SDK v2

#ai #mcp #tutorial #typescript
1
Comments
16 min read
HTTP API with API Gateway and Lambda in CDK
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HTTP API with API Gateway and Lambda in CDK

#api #architecture #aws #serverless
Comments
19 min read
Set up Bedrock model fallback with AgentCore Gateway
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Set up Bedrock model fallback with AgentCore Gateway

#ai #architecture #aws #llm
Comments
15 min read
UPDATE_ROLLBACK_FAILED: Rescue Stacks with Force Rollback
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UPDATE_ROLLBACK_FAILED: Rescue Stacks with Force Rollback

#aws #cloud #devops #infrastructure
Comments
16 min read
DynamoDB with Lambda and CDK: Build a Guestbook API
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DynamoDB with Lambda and CDK: Build a Guestbook API

#api #aws #database #serverless
Comments
20 min read
Pre-mortem method: a facilitation guide for teams
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Pre-mortem method: a facilitation guide for teams

#agile #management #productivity
Comments
12 min read
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