Steffen Leistner

Development of AWS based serverless backend and push notification services for My Porsche App. - Implemented a managed message delegation service on top of Kafka, SQS and Fargate. - Introduced and developed CI/CD pipelines in order to support test automation and deployment. - Developed REST Apis based on a cloud native microservices network build on top of AWS Lambda and Apigee.

Development of IoT, Data Ingestion, Data Lake and Data Warehouse services. - Built IoT device messaging and mobile clients, web interfaces and analytics big data stores - Implemented a managed streaming ingestion service - Introduced and developed CI/CD pipelines in order to support test automation and deployment Team leader Cloud Application Development - Actively involved in recruitment processes and hiring decisions - Provided pre-sales support with direct customer contact

AWS IoT and Lambda services for SIEMENS SDI (Software Defined Inverter) * in-house start-up for I/Os

Creating a next generation IoT platform for digital sports, which encourages wearable device makers, data scientists and app developers to collaborate through a plugin system. - Helped creating the initial concept, business case, prototype and roadmap for the system. - Managed the distributed team, with processes and tools to promote collaboration across locations. - Implemented the plugin service runtime which enabled 3rd party extensions to run in a secure sandboxed environment.

Blissbooker is the one destination to search, explore and reserve beauty and wellness treatments. - Created the initial concept, business case, prototype and roadmap for the system. - Recruited a self -organising team of 30 internals and externals to develop and manage the system. - Managed the distributed team, with processes and tools to promote collaboration across locations. - Implemented data warehousing infrastructure.

Software Development & Consulting - NodeJS, Java, Spring, Ruby on Rails, JavaScript, Jive SBS, iPhone & Android Apps

Development of “miCoach”, Adidas’ interactive, personal coaching and training network.

Architecture and development “Ovi Maps Player”, Nokia's first online mapping solution for Web developers.

Software Developer, Ruby on Rails, JavaScript driven web applications.