.We are a young, fast-growing startup building cutting-edge technology to revolutionize cloud development processes and support highly efficient dev & test feedback loops. At its core, LocalStack provides a high-fidelity emulator and local cloud development platform - imagine developing cloud applications and data pipelines entirely on your local machine within a lightweight cloud sandbox, running in Docker. Our mission is to empower developers to rapidly build and test their cloud applications, allowing for a more enjoyable dev experience, and saving valuable time and resources.LocalStack has a large and active open source community (51k+ stars on GitHub) with several 100k active users worldwide and 200M+ downloads to date. With a growing international customer base across Fortune Global 500 companies for our advanced enterprise offerings, as well as a growing, globally distributed team of top-notch engineers and GTM experts, we are on an exciting growth journey to become the world's leading platform for local cloud software development.LocalStack is headquartered in Zurich/Switzerland, with a development office in Vienna/Austria and remote team members from around the world (incl. US, FR, UK, IN, IT, MX, IE).We are looking for an experienced Senior Software Engineer with a strong background in Python development and expertise in AWS. The candidate will play a significant role in enhancing and expanding LocalStack's AWS core cloud emulator with features, parity improvements, and integrations. While proficiency in Python and AWS is essential, experience with other cloud platforms is also advantageous.Key Responsibilities Contribute to LocalStack's AWS emulator, applying and extending the LocalStack emulator framework to implement and test AWS APIs.Collaborate in a Core Engineering squad to implement features that meet the needs of developers working with AWS environments.Develop high-performance local cloud service emulators while maintaining a strong focus on reliability and developer experience.Contribute to the evolution of LocalStack's overall architecture and frameworks, and contribute to the Open Source ecosystem.Help make LocalStack's AWS emulator more robust by contributing to AWS sample applications and parity tests.Spearhead the development of scalable support processes as the company and user base grows.Bring the customer feedback back to the developer and product team and help shape our product direction.As our enterprise offering grows, work more closely with larger customers that use our product for their entire organization.Required Qualifications 3+ years of professional experience in software engineering, with a focus on Python development.Strong hands-on experience with modern Python development (type hinting, unit/integration testing with pytest, object-oriented software design, applying Python frameworks)