Waldemar Hummer
Co-Founder And CTO Co-CEO at LocalStack
Zurich, Zurich, Switzerland
Summary
🤩
Rockstar🎓
Top SchoolWaldemar Hummer is a seasoned technology leader and Co-Founder/CTO currently scaling LocalStack, a widely used local AWS cloud stack and DevOps platform (LocalStack has 23k+ stars on GitHub). With 13 years of engineering experience and a PhD in computer science, he has led engineering organizations of 40+ to 300+ people and built large-scale, globally distributed SaaS and data analytics platforms across fintech, insurance, and enterprise AI. He blends hands-on backend and cloud engineering—contributing core features and Windows support to awscli-local and expanding LocalStack’s API Gateway and CloudFormation compatibility—with strategic product and technical roadmapping. Former roles at IBM, Atlassian and Advanon evidence deep expertise in cloud-native architectures, ML/ModelOps, and streaming systems. Known as an open-source enthusiast and pragmatic problem-solver, he often moves complex integrations from research into production-grade developer tools. Based in Zurich, he combines startup founder grit with enterprise-scale delivery.
13 years of coding experience
12 years of employment as a software developer
Vienna University of TechnologyBachelor of Science (BSc) Business Administration, Bachelor of Science (BSc) Business Administration at WU (Vienna University of Economics and Business)Bachelor of Science (BSc) Computer Science, Bachelor of Science (BSc) Computer Science at Universität Innsbruck
German, English, French, Spanish
Stackoverflow
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Github Skills (41)
caching10
boto10
back-end-development10
python10
package-management10
localstack10
setuptools10
testing10
flask-ask10
redash10
aws-apigateway10
aws-cloudformation10
aws10
aws-api-gateway-v210
flask10
Programming languages (15)
Github contributions (5)
localstack/awscli-local
Jul 2017 - Sep 2022
💲 "awslocal" - Thin wrapper around the "aws" command line interface for use with LocalStack
Role in this project:
Back-end & DevOps Engineer
Back-end & DevOps EngineerContributions:15 reviews, 29 commits, 21 PRs in 5 years 2 months
Contributions summary:Waldemar primarily contributed to the `awscli-local` project by modifying the `setup.py` file to update the wrapper's functionality and features. They added Windows support through a batch file, implemented enhancements related to piping binary files, and shifted the core logic to be in-memory. The user also addressed compatibility issues, improved AWS CLI integration, and updated the version of the tool.
aws-clicommand-line-interfacelocalstackjqthin
getmoto/moto
Aug 2016 - Aug 2021
A library that allows you to easily mock out tests based on AWS infrastructure.
Role in this project:Backend Developer
Backend DeveloperContributions:16 reviews, 23 commits, 26 PRs in 5 years
Contributions summary:Waldemar contributed to the `moto` library, focusing on mocking AWS infrastructure for testing purposes. Their work included implementing support for requestTemplates in the APIGateway mock, enhancing its functionality. Further contributions involved adding initial support for APIGateway stages and improving message polling for SQS queues. They also addressed issues related to domain handling and character encoding within the S3 API.
ec2bototestinginfrastructureaws-infrastructure
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