Laurin Hagemann Email and Phone Number

• Realization of a community based approach to an open‑source learning‑platform into a software architecture• Actively promoted the platform leading to strategic partnerships and collaborations• Created bi‑weekly community meetings for dynamic curriculum evolution and cultivating collaboration• Implementation of a first prototype on learngraph.org (Kubernetes, React (Typescript), jest, Golang, PostgreSQL, GraphQL RPC)

Tech stack: Golang, GraphQL, RabbitMQ, REST, protobuf, PostgreSQL, MySQL, Redis, Android, Python (pandas, NetworkX), Kubernetes, Helm, Terraform, AWS• Integrated an online payment solution into a microservice architecture (Kubernetes) by using Golang (GraphQL, gqlgen), NodeJS (Angular)• Decentralized monolithic legacy applications (MySQL) by replacing them with new microservices (PostgreSQL, Redis), which required changesin the whole stack from Golang & Python Backends to Android (Java, Kotlin) and iOS Frontends• Inter-connected microservices (REST, protobuf) with RabbitMQ• Debugged issues inside an EKS Kubernetes cluster (Helm, Terraform, AWS Secrets Manger) with distributed logging (New Relic)

- Designed and performed multiple Workshops for a big insurance company- Taught XP-principles by using Pair- and Mob-Programming exercises, with a focus on Clean Code, Clean Architecture, TDD, CI/CD- Completed the Certified Scrum Master (CSM) test

Tech stack: C++17, protobuf, gRPC, UART-IP, cURL, OpenSSL, Alsa, GTest, GMock, Docker, Python, Swig, Java, Kotlin, libclang, pytest, Perforce, Swarm• Designed and Integrated a hybrid of online and satellite radio (SiriusXM) into Audi’s IVI, a highly asynchronous system, with strong stabilityrequirements; technologies include proprietary IPC, protobuf, UART-IP, cURL, OpenSSL, Alsa, GoogleTest, GoogleMock• Increased development efficiency for our team by creating a Docker-based build tool (python) that ensures a common development environ-ment• Held presentations about Golang, gRPC, mathematical proofs of thread safety• Lead architecture discussions of an Agile team with jira sprint management (SPICE conform, SAFe inter-Team communication), we used Plan-tUML, asciidoc and arc42 documentation• Greatly reduced concurrency bugs by implementing company-wide C++17 utilities for synchronizing data access (e.g. java:synchronized,Golang:Channel)• Invented and Designed a generator-based DI framework for C++ libraries (Mako Templates, libclang-bindings), which lead to a big increase intest coverage and thereby reduced bug chance• Designed an Android application (Kotlin) for the next project iteration, that can reuse the existing C++ code, by communicating via a swiggenerated JNI layer between Kotlin and C++• Improved overall system stability by finding bugs in external proprietary binaries (i.e. no source code available) using GDB, Valgrind, Radare2,TCMalloc

• Enabled CIAT to publish of a subset of entries in an OracleSQL database, by writing a updater daemon (python) that filters & translates thedata into the Chado format and fills a second database (PostgreSQL). Due to the complexity of Chado and the huge amount of data I had toparallelize where possible• Installed and configured the Drupal7 (Tripal) front-end (PHP, Javascript)

• Vastly increased efficiency of type setting of book covers by implementing a graphical tool (Python, QT) that automatically fetches cover infor-mation from Google Spreadsheets and Foxpro DBF• Reduced workload of publisher by performing a database migration (from Foxpro DBF, MySQL and Google Spreadsheets to PostgreSQL) andimplementing a custom project management application for their needs (Ruby on Rails, TDD - Test Driven Development)