SQL Experts in Leipzig

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

• Developed numerous features, optimised performance, refactored code and analysed errors
• Refactored the development container setup
• Optimised the Gitlab-CI build pipeline
• Introduced improvements to the team workflow

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

• Lead programmer, architect and deputy product owner
• Completed transition from zPDV to STEP
• Ensured quality of C++ and Perl sources through automated and manual checks
• Supported resolution of incidents and errors in testing
• Implemented batch for supplementary assignment of payment run numbers
• Implemented batch for distribution of SGB 2 information to the central payment unit
• Supported replacement of Solaris with Linux
• Upgraded gcc from 7.4 to 9.3
• Programmatically generated Makefiles from Borland projects for builds
• Extended funding data with new attribute “Kennzeichen Fahrtkosten Praktikum”
• Programmatically generated XSD and WSDL files from IDL definitions
• Represented the product owner when needed
• Implemented batch for one-time payment processing
• Developed generator for Liquibase files
• Implemented and maintained regular anonymization of production data
• Supported migration from SLES 12 to SLES 15
• Supported introduction of mutual TLS
• Implemented batch for sending deletion impulses to EDA BE
• Organized script directory structure
• Investigated potential introduction of String-Latin and implemented minimal solution
• Remediated security findings identified by CheckMarx
• Supported PAP recalculations and general change notices
• Converted ERP interfaces from SOAP to REST
• Planned technical and business topics such as register modernization, cash register security, training costs, four-eyes principle

• Development of an iOS app that combines public transport and sharing services
• Collaboration according to Scrum in a large cross-functional team
• Creation of reusable components with SwiftUI and Combine
• Development of a custom solution for Apple Maps

• Maintenance and system handover
• Planning and carrying out core and plugin updates
• Developing a plugin to extend invoice creation and payment via Flow Builder

• 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.

• Managed and implemented worldwide outdoor test facilities for both prototype and commercial silicon-based photovoltaics.
• Produced comprehensive technical reports on short- and long-term outdoor performance, collaborating with cross-functional teams to identify and address performance trends.
• Enhanced efficiency in data analysis by developing automation tools and dashboards.
• Modeled and simulated the yield of systems and modules to support product development.
• Published research findings at international conferences and established partnerships for enhanced research outcomes.

• 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

• Achieved full productivity within 2 weeks of onboarding in a high-volume operational environment.
• Consistently exceeded quality targets, maintaining 98% accuracy across all assigned tasks.
• Recognized by leadership for exceptional performance and rapid adaptation to complex workflows.

• Developed a fully local, privacy-friendly RAG chatbot for querying PDFs containing both text and tables.
• Enabled semantic search across multiple documents and built a user-friendly Chainlit UI with rating (1–5) and feedback functionality.
• Designed a reward model for fine-tuning the LLM based on user feedback.

• Took over management of the company

• Developed an API for customers to provide NFS shares in the cloud
• Created Kubernetes operators and services with REST APIs in Go
• Used LinuxKit to provision VMs

• API-first product design (OpenAPI 3, HAL) and development (NodeJS)
• Setting up DevOps pipelines with GitHub Actions in an AWS architecture
• Technologies: OpenAPI 3, REST, HAL, NodeJS, JavaScript, TypeScript, AWS, AWS Lambda, Docker, GitHub Actions

• 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