Freelancer profile translated to English.

Description

I help companies transform manual back-office processes and overloaded custom backends into clean, maintainable cloud software — as a Cloud Engineer with three years of hands-on experience in building and operating productive AWS backends.

Focus: serverless architectures on AWS, backend automation for e-commerce and SaaS, and the productive integration of AI into existing systems. I make architectural decisions that will last for three years – and don't need to be rebuilt every three months.

Stack: AWS Lambda, EventBridge, DynamoDB, Aurora Serverless v2, SAM, and CloudFormation. For AI topics, the Anthropic API in production, with eval setup, logging, and clean tool-use integration.

Typical mandates: Serverless backends for SaaS and e-commerce, third-party system integrations (Shopify, Stripe, DPD, DHL, DATEV, FinTS), AI integration into existing backends, multi-account CI/CD and cost optimization, accounting automation.

Remote from Nuremberg, in German or English. On-site appointments in Munich, Frankfurt, or Stuttgart possible. Fixed price per delivery package or daily rate, depending on the project.

Industry field of expertise

Languages

German
Native or bilingual
English
Fluent

Workplace preferences

Remote only

Primarily works remotely

Muthu GmbH
Cloud Architect
PUBLISHING
January 2025 - April 2026 (1 year and 3 months)
SaaS platform for multi-channel book distribution. Fully serverless event-driven stack on AWS — seven independent microservices, coupled via EventBridge, from order entry through multi-supplier fulfillment to delivery.

• Processed over 15,000 orders in production
• 27% fewer bugs through in-house development of a flow- and event-based testing framework for EDA
• 78% reduction in GitHub Actions costs through self-hosted runners and custom actions; multi-account CI/CD including integration tests and service-level deploys
• Integration of Stripe, Shopify, Amazon SP-API, Wise, and multiple third-party supplier systems
• Observability with CloudWatch Insights, X-Ray, Lambda Powertools, and Slack alerting
AWS Serverless Event-driven architecture DynamoDB AI Integration Cloud Formation
kurzschlussFest GmbH
Cloud Engineer
E-COMMERCE
May 2023 - December 2024 (1 year and 7 months)
Nürnberg, Germany
Direct-to-consumer business with its own Shopify store. Development and operation of several microservices for order processing and accounting, as well as integration of various third-party systems.
• Serverless backend Shopify ↔ Workshop — in production with several hundred orders per month, 15% faster delivery times through automated order routing and pick list pipeline
• 17% fewer shipping errors through address validation and automatic shipping label creation (DPD, GEL); 7% shipping cost savings through optimized carrier routing
• Accounting and payment automation via DATEV/FINTS/Click using AWS Services (Lambda, SES, Secrets Manager) including AI-based invoice reading
• Savings of approx. 15 hours per month in accounting, 80% fewer missing documents

Stack: AWS Lambda, SAM, S3, DynamoDB, Secrets Manager, SES, Python, Shopify API, Billbee API, DATEV, FinTS
AWS Serverless AI Integration AWS Lambda Shopify Apps FinTs
Siemens AG
Embedded & Edge Engineer
INTERNET OF THINGS (IOT)
August 2018 - August 2022 (4 years)
Erlangen, Germany
Development of decentralized edge and cloud monitoring systems in the I&C sector. Bachelor's thesis on the monitoring strategy for decentralized on-premise systems. Bridging the gap between edge computing and cloud observability. Working with Siemens MindSphere (industrial IoT/cloud backbone), edge computing architectures, and monitoring strategies for distributed on-premise systems.
Stack: MindSphere, Edge Computing, Industrial IoT, Embedded Systems, Monitoring
SQLite Edge Computing Cloud architect