PostgreSQL Experts in Leipzig

• Extension of OSGi modules in a complex communication solution
• Debugging communication with Wireshark and remotely in the JENS test environment
• Migration of tests from TestNG to JUnit 5 with Mockito and AssertJ
• Updating vulnerable dependencies and improving code quality
• Changes to the Vaadin frontend
• Increasing test coverage

• Overall coordination of service providers for all infrastructure topics at a production site being set up in Baden-Württemberg
• Design and finding solutions for internet connectivity, building office communication networks, setting up WLAN in production and administration buildings, IP address management, password policies, time tracking, access control systems, backup strategies, emergency power planning, operating concepts, cost planning, event management, workplace setup including laptop/mobile phones/telephony, remote support, print servers
• Selecting suitable external service providers and planning to meet needs for spare parts, repairs, on-site service, network and workplace support including on-site system replacement by providers
• Choosing suitable external service providers for facility management and building technology (fiber optic connections, data center infrastructure, cable ducts etc.)
• Coordination with clients and service providers
• Escalation management, schedule control
• On-site presence for service meetings and managing service providers

• Development of a B2B shop based on Magento 2
• Plugin research and implementation, e.g. custom prices per customer
• Implementation of individual customizations
• Quality assurance
• Release management
• Collaboration with the marketing team
• Technologies: Magento 2, CSS, JavaScript, PHP, Docker, Git

• Built an internal AI recruitment assistant (Python, LangChain, Claude API) and deployed it into the team's Greenhouse workflow: automated candidate screening, structured interview-feedback extraction from transcriptions, and comms across high-volume DACH/EMEA GTM pipelines. Scoped the need with TA/GTM leadership, shipped the tool, and drove day-to-day adoption, the same loop a forward-deployed engineer runs at a customer site.
• Led ATS migration from Personio to Greenhouse across the whole team: data model, migration, and team adoption.
• Ran discovery-style intake calls translating vague requests ("we need someone senior for Italy") into structured requirements, the muscle a forward-deployed engineer uses to scope a customer deployment. 80%+ offer acceptance, ~120% of quarterly targets. Discovery and delivery in EN, DE, ES, FR.

• Implementation of an API for customers to provide NFS shares in the cloud
• Creating Kubernetes operators and services with REST APIs in Go
• Using LinuxKit for provisioning VMs

Further development of a software solution for managing test requests and test notifications according to §106d SGB V for the Hamburg Association of Statutory Health Insurance Physicians.

• Developed numerous features, performance optimizations, refactoring, error analysis
• Refactored the dev container setup
• Optimized the GitLab CI build pipeline
• Contributed optimizations to the team workflow

• Tech-Stack: Python, Qt, tensorflow.js, plotly, Angular, TypeScript, HTML, CSS, Git

• Rule-based software for managing, planning, and providing promotional materials in the pharmaceutical industry

• High performance, high availability

• Fullstack, DevOps (CI/CD)

• Python, PostgreSQL, Vue.js, Typescript, Docker, Docker-Compose, Nginx

• Successfully transformed old Excel-based processes into an optimized product that has been in production since 2024

• training and official certification as Certified Kubernetes Application Developer
• open-source development and documentation in a personal project
• keeping updated about cloud native and AI technologies through courses and books
• Tech: Kubernetes, Docker, Typescript, Node.js

• Led the development of a complex geospatial data platform, engineering an end-to-end system for processing and analyzing high-resolution aerial imagery.
• Engineered a scalable backend responsible for on-the-fly map tile serving and running complex data analysis queries using PostGIS and Python.
• Developed and trained custom computer vision models using Python, PyTorch, and YOLOv8 to perform object detection and segmentation on large-scale datasets.
• Built modern, responsive user interfaces and data visualization dashboards using Next.js, TypeScript, and React.
• Gained practical expertise in geospatial libraries such as GDAL and Rasterio for processing and manipulating raster and vector data.
• Managed the entire project lifecycle, from initial technical architecture and database design to final deployment using Docker.

• Analysis, redesign and functional specification for a software system to record, process and reimburse all claims in the girocard scheme
• Analysis, conception and execution for a bidding for the introduction and implementation of Identity & Access Management, Masterdata Management and Document Management Systems
• Project management for the software development project for the EKS-Net platform for the recording, processing and reimbursement of all claims in the girocard scheme
• Project management for the introduction of Identity and Access Management System, Master Data Management System and Document Management System
• Strategy consulting for digitalization of business processes
• Advice on payment transactions, compliance (PEP and sanction list checks) and risk analysis
• Design of data models and APIs

• Agile software development in an interdisciplinary environment

• Cross-team collaboration to achieve important milestones

• Independently developing new and improving existing features

• Estimation, refinement, implementation, and presentation

• Finding solution ideas, analyzing problems, rolling out bug fixes

• Writing automated tests, manual testing, log and error analysis

• Ensuring high availability, fault tolerance, and scalability of the production environment

• Rolling out releases and multi-stage infrastructure

• Setting up alerts and monitoring

• Pair programming, code reviews, documentation

• On-call duty, 3rd level support

• Event-Driven Architecture, Clean Code, Hexagonal Architecture

• Microservices based on Go (Gin), Java 21 (Spring Boot 3), Python (FastAPI)

• Terraform/OpenTofu, KQL, SQL, JSON, REST, Helm, ArgoCD, AzureCLI, K9s, OAuth2

• Postgres, Redis, Kafka, Azure EventHub, Kubernetes, nginx, Ingress

• AppInsights, LogAnalytics, OpenTelemetry, Datadog, OpenAPI 3, Swagger

• Azure DataExplorer, Storage, KeyVault, Container Registry, Azure Functions,…

• Junit5/Jupiter, testify, RestAssured, Docker Compose, Wiremock

• IntelliJ, Scrum, Kanban, Teams, Confluence, OpsGenie, Arc42

• GitHub CI/CD, GitLab CI/CD, Azure DevOps

• EV charging protocols (EVSE, OCPP, V1G, V2G)