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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

How to run a game day: a playbook for failure drills
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How to run a game day: a playbook for failure drills

#devops #sre #testing
Comments
12 min read

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Validate Lambda events with Powertools Parser and Zod
sascha-ms profile

Validate Lambda events with Powertools Parser and Zod

#aws #backend #serverless #typescript
Comments
14 min read
Parameter Store data types: validate values on write
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Parameter Store data types: validate values on write

#aws #devops #serverless
Comments
16 min read
DynamoDB Bulk Put Items: Load S3 Data into Existing Tables
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DynamoDB Bulk Put Items: Load S3 Data into Existing Tables

#aws #database #serverless #tutorial
Comments
18 min read
GitHub Actions OIDC: AWS deploys without access keys
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GitHub Actions OIDC: AWS deploys without access keys

#aws #cicd #devops #security
Comments
13 min read
CloudWatch API key: OpenTelemetry traces without SigV4
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CloudWatch API key: OpenTelemetry traces without SigV4

#api #aws #cloud #monitoring
Comments
15 min read
On-call rotation: how to organize it fairly
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On-call rotation: how to organize it fairly

#devops #leadership #management #sre
BERJAYA 1
Comments 1
8 min read
AWS FIS Lambda: chaos experiments step by step
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AWS FIS Lambda: chaos experiments step by step

#aws #devops #serverless #testing
Comments
16 min read
Claude Message Threads API: Agent Loops in TypeScript
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Claude Message Threads API: Agent Loops in TypeScript

#agents #api #claude #typescript
Comments
16 min read
Incident Commander Role: A Guide for Small Teams
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Incident Commander Role: A Guide for Small Teams

#devops #leadership #sre
Comments
12 min read
Validate Environment Variables in Lambda with Zod
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Validate Environment Variables in Lambda with Zod

#aws #backend #serverless #typescript
Comments
13 min read
Blameless postmortem: process, questions and template
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Blameless postmortem: process, questions and template

#devops #leadership #management #sre
Comments 1
12 min read
Lambda Powertools TypeScript: logs, metrics, traces
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Lambda Powertools TypeScript: logs, metrics, traces

#aws #serverless #typescript
Comments
15 min read
Agent Package Manager: Keep Skills Updated with Dependabot
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Agent Package Manager: Keep Skills Updated with Dependabot

#agents #ai #automation #github
Comments
14 min read
Reduce Lambda Cold Starts: A TypeScript Guide
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Reduce Lambda Cold Starts: A TypeScript Guide

#aws #performance #serverless #typescript
Comments
16 min read
pull_request_target blocked: fix workflows by Dec 2
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pull_request_target blocked: fix workflows by Dec 2

#devops #github #security
BERJAYA 1
Comments
13 min read
How to Run a Retrospective: Phases, Formats, Agenda
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How to Run a Retrospective: Phases, Formats, Agenda

#agile #management #productivity
BERJAYA 1
Comments
11 min read
Kafka share groups with Lambda: set up queue mode
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Kafka share groups with Lambda: set up queue mode

#architecture #aws #backend #serverless
BERJAYA 1
Comments
19 min read
AGENTS.md setup: one file for Claude, Copilot and Codex
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AGENTS.md setup: one file for Claude, Copilot and Codex

#agents #ai #claude #githubcopilot
BERJAYA 2
Comments 2
16 min read
Giving feedback to your manager: a guide for developers
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Giving feedback to your manager: a guide for developers

#career #leadership #management
BERJAYA 1
Comments
10 min read
DynamoDB rate limiting: a token bucket for Lambda
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DynamoDB rate limiting: a token bucket for Lambda

#aws #dynamodb #serverless #typescript
BERJAYA 1
Comments
19 min read
GitHub Agentic Workflows: Issue Triage Step by Step
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GitHub Agentic Workflows: Issue Triage Step by Step

#agents #automation #github #tutorial
BERJAYA 1
Comments
11 min read
Serverless & AI in brief: week 44/2026
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Serverless & AI in brief: week 44/2026

#agents #ai #aws #serverless
BERJAYA 1
Comments
9 min read
Path-specific Copilot custom instructions: a guide
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Path-specific Copilot custom instructions: a guide

#ai #github #tutorial #typescript
BERJAYA 1
Comments
15 min read
Secrets Manager Rotation with Lambda for API Keys
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Secrets Manager Rotation with Lambda for API Keys

#aws #security #serverless #tutorial
BERJAYA 1
Comments
19 min read
AppConfig feature flags in Lambda: safe rollouts
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AppConfig feature flags in Lambda: safe rollouts

#aws #monitoring #serverless #typescript
BERJAYA 1
Comments
17 min read
AI code review: team rules for Copilot approvals
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AI code review: team rules for Copilot approvals

#ai #github #softwaredevelopment #softwareengineering
BERJAYA 1
Comments
11 min read
Parameter Store in Lambda: loading config the right way
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Parameter Store in Lambda: loading config the right way

#aws #backend #serverless #tutorial
BERJAYA 1
Comments
15 min read
Async daily standup: when it works and when it doesn’t
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Async daily standup: when it works and when it doesn’t

#agile #management #productivity #remote
BERJAYA 1
Comments
11 min read
EventBridge Scheduler one-time schedule for every booking
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EventBridge Scheduler one-time schedule for every booking

#architecture #aws #serverless
BERJAYA 1
Comments
21 min read
Token Budget for AI Agents on Amazon Bedrock
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Token Budget for AI Agents on Amazon Bedrock

#agents #ai #aws #serverless
BERJAYA 1
Comments
25 min read
Written Feedback in Remote Teams: Chat or Call?
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Written Feedback in Remote Teams: Chat or Call?

#leadership #management #remote
BERJAYA 1
Comments
11 min read
Human in the Loop for AI Agents with Step Functions
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Human in the Loop for AI Agents with Step Functions

#agents #ai #automation #aws
BERJAYA 1
Comments
18 min read
Receiving webhooks with Lambda: signatures, duplicates, SQS
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Receiving webhooks with Lambda: signatures, duplicates, SQS

#api #aws #backend #serverless
BERJAYA 2
Comments
18 min read
Prompt Injection in MCP: Securing Lambda Tools
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Prompt Injection in MCP: Securing Lambda Tools

#aws #mcp #security #serverless
BERJAYA 1
Comments
18 min read
Stay interview: a guide with questions for leaders
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Stay interview: a guide with questions for leaders

#career #leadership #management
BERJAYA 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
BERJAYA 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
BERJAYA 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
BERJAYA 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
BERJAYA 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
BERJAYA 3
Comments 7
16 min read
Copilot Assisted Permissions: a safe setup
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Copilot Assisted Permissions: a safe setup

#agents #ai #github #security
BERJAYA 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
BERJAYA 1
Comments 3
23 min read
Offboarding checklist: when someone leaves the team
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Offboarding checklist: when someone leaves the team

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

#automation #aws #security #serverless
BERJAYA 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
BERJAYA 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
BERJAYA 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
BERJAYA 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
BERJAYA 1
Comments
18 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
BERJAYA 1
Comments
16 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
BERJAYA 1
Comments 3
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
BERJAYA 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
BERJAYA 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
BERJAYA 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
BERJAYA 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
BERJAYA 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
BERJAYA 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
BERJAYA 1
Comments
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
BERJAYA 1
Comments
19 min read
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