I participated in AWS Community Day DACH 2025, one of the largest AWS community events in Europe
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What is AWS Community Day DACH 2025?
AWS Community Day DACH is one of the largest AWS community events in Europe, held in the DACH region (Germany, Austria, Switzerland). In 2025, it was held on October 7th in Munich.
Event Characteristics
A key feature of this event is that it's community-driven, organized by AWS Community Heroes, AWS Community Builders, and local AWS User Groups.
The sessions aren't corporate marketing presentations but rather sharing of practical knowledge by engineers working in the field. Many sessions focus on "practice" rather than "theory," including stories of failures and struggles, sharing real-world insights from the field.
Comparison with Previous Events
I also participated in 2023, and summarized that experience in the blog below:
https://dev.classmethod.jp/articles/2023-09-14-dach-event-report/
| Year | Participants | CFP Submissions |
|---|---|---|
| 2023 | 500+ | 140 |
| 2023 | 650+ | 236 |
| 2025 | 650+ | - |
The event continues to grow in scale year by year.
Session List
This event featured about 30 sessions across three parallel tracks (Wien, Barcelona/Porto, and Toskana/Sizilien). I've categorized all sessions by topic:
| Title | Topic |
|---|---|
| Keynote - High Performance Organizations: Better outcomes, Faster | Cloud, Organization, Culture |
| Implementing Compliance in AWS with Terraform: Practical Steps That Work | Terraform, Compliance, Security, IaC |
| Build a next-level Deployment Strategy with the Cloud Development Kit (CDK) Ecosystem | CDK, GitOps, CI/CD, IaC |
| PostNL's Greengrass Journey - How PostNL modernized 1100 Parcel Lockers using Greengrass | IoT, Greengrass, Edge Computing |
| Log Everything, Miss Nothing: Deep Dive into AWS Security Logging | Security, Logging, SIEM |
| I didn't know Amplify can do this | Amplify, Frontend, AppSync, GraphQL |
| MCP Servers - Minus the Servers | AI, MCP, Serverless, Lambda |
| We Thought Microservices Would Save Us: Coupling in Real-World Serverless Architectures | Serverless, Microservices, Architecture |
| Rethinking CloudWatch: Advanced AWS-native Observability That Can Save You $100k+ On 3rd Party Tools | CloudWatch, Observability, Cost Optimization |
| Building Cloud-Native AI Agents with Strands: The Open Source SDK from AWS | AI, Strands Agent, MCP |
| What I learned building a Scalable, Highly Available Serverless Backend Across Multiple Regions | Serverless, Multi-Region, High Availability |
| From 0 to 1 Million Events - EDA for the real world | EventBridge, Event-Driven Architecture, TypeScript |
| AWS Billing: a Critical Look | Cost Optimization, Billing, FinOps |
| Event-driven architecture, the hard parts | Event-Driven Architecture, Observability, Testing |
| Serverless Observability - less to manage, harder to observe? | Serverless, Observability, OpenTelemetry |
| Symphony of Things - Exploring AWS IoT Through Music | IoT, IoT Core, Greengrass, Edge Computing |
| Real-time UI Updates: From WebSockets to AppSync | AppSync, WebSocket, GraphQL, Real-time |
| Navigating the AWS European Sovereign Cloud: Practical Strategies for a Multi-Partition Future | European Sovereign Cloud, Compliance, Multi-Account |
| Automating AWS Integration with Amazon Cloud Control API at System Initiative | Cloud Control API, Automation, IaC |
| Serverless Email with AWS SES: From Setup to Sending and Receiving in Today's World | SES, Email, Serverless, Lambda |
| Beyond Detection: Auto-Remediating 10,000 Security Hub Findings Per Day | Security Hub, Automation, Compliance, EventBridge |
| Hidden trade-offs in distributed architectures | Distributed Systems, Architecture, Lambda, DynamoDB |
| Serverless applications with Aurora DSQL as a database of choice | Aurora DSQL, Serverless, Database, Strands Agent |
| Applying a serverless mindset to internal developer platforms | Developer Platform, Serverless, IDP |
| Gelber Zettel goes Cloud | Serverless, ECS, Fargate, DynamoDB, Healthcare |
| Control Flow: The Secret to Serverless Integration that's Hidden in Plain Sight | Serverless, Integration, Architecture |
| We test in production – how we enforced web security for hundreds of applications | Security, WAF, Shield, Multi-Account |
| From slow to performant Athena queries - is it S3 or S3 Tables? | Athena, S3, Performance, Query Optimization |
| Scaling AWS across multi regions using AWS Cloud WAN & VPC Lattice | Multi-Region, Networking, Cloud WAN, VPC Lattice |
| Keynote - Building Better Together: How Community Feedback Shapes AWS | Community, AWS |
Topic Analysis
When tallying the session topics, this year's trends become clear:
| Topic | Occurrences |
|---|---|
| Serverless | 12 |
| Security | 6 |
| AI / MCP / Strands Agent | 5 |
| Event-Driven Architecture | 4 |
| IoT / Edge Computing / Greengrass | 4 |
| Observability | 3 |
| IaC (Infrastructure as Code) | 3 |
| Cost Optimization | 3 |
| Multi-Region / Multi-Account | 3 |
| CDK, Compliance, Architecture, Lambda, DynamoDB, AppSync / GraphQL | 2 each |
Changes in Trends:
- In 2023, "Serverless: 15 times" was the most common topic, and it continued to maintain the top position in 2025 with "Serverless: 12 times"
- Meanwhile, new topics like AI and MCP appeared 5 times, showing the practical adoption of generative AI is progressing
Event Atmosphere
The event had the friendly atmosphere typical of community events, with active Q&A sessions after presentations.
Free breakfast and dinner were also provided, allowing attendees to network in a relaxed environment.
Summary
AWS Community Day DACH 2025 was a wonderful event where attendees could gain both technical knowledge and community connections.
In particular, hearing directly from engineers active in the field was a valuable experience.
I plan to publish individual blog posts about the most impressive sessions later. Stay tuned!