Software Deployment Expert in Berlin

• Founded an AI-powered scheduling and business-management SaaS for SMBs, owning technology strategy, architecture, product development, UX, billing and go-to-market execution.
• Architected and shipped a multi-tenant platform with REST APIs, RBAC, CRM, billing and notifications, powering the manager dashboard, admin console, booking experience and iOS/Android applications.
• Led and mentored 7 software engineers, 1 DevOps engineer, 1 QA engineer and 1 UX/UI designer, while remaining hands-on across backend, frontend and product delivery.
• Built AI voice and chat agents using Python/FastAPI, OpenAI and Anthropic APIs, RAG, pgvector and tool calling; integrated Twilio, Google Calendar/Meet, Stripe and Firebase.
• Owned production infrastructure and automated delivery across separate environments using Docker, Nginx, GitHub Actions and Grafana; represented the company at accelerators and international startup events.

Selected stack: Python, FastAPI, Node.js, Vue 3, React/Next.js, React Native, PostgreSQL, Redis, Docker

• Codebase Evaluation & Problem Design: Designed and stress-tested complex software engineering problems against large open-source Python codebases (including pandas), requiring deep context acquisition and architectural understanding to produce well-scoped, realistic problem statements aligned to strict correctness guidelines.
• Agent Failure Analysis: Assessed LLM coding agent solutions for correctness and completeness, identifying meaningful failures across edge case handling, dtype behaviour, and multi-column NaN propagation logic; documented findings with precision for downstream evaluation use.
• Programmatic Test Suite Development: Authored comprehensive pytest suites to programmatically verify agent-generated solutions against defined requirements, with deliberate coverage of boundary conditions and failure modes not caught by naive implementations.
• Containerised Environment Engineering: Built and debugged Docker environments for reproducible agent execution, including git-based repository provisioning, dependency pinning with npm ci, and multi-stage Dockerfile authoring across Linux-based containers.

• Responsibility for time, budget and quality targets of the sub-project
• Creation and maintenance of the sub-project plan including dependencies to FI, CO, PP, SD
• Definition of work packages, resource planning and progress monitoring
• Risk and change management within module scope
• Analysis of as-is processes in procurement, logistics and warehouse management
• Design of to-be processes according to SAP standard (EWM warehouse processes such as goods receipt, put-away, picking, goods issue)
• Coordination with key users and specialist departments
• Support for interface development with external warehouse systems and supplier portals
• Organization of test data, error tracking and test documentation
• Support for deployment preparation and key user training
• Participation in the cutover plan (data migration, go-live preparation)
• Support of the department during the hypercare phase after go-live
• Assistance in mapping EWM core processes
• Management of external service providers
• Use of Jira, Confluence, Signavio, MS Teams, Aqua ALM

• Designed and developed image classification models for computer vision tasks, including dataset creation, preprocessing, validation, and visualization; applied machine learning and deep learning techniques to optimize accuracy and performance.
• Conducted experiments with appropriate ML algorithms, LLM-based approaches, and tools; performed statistical analysis, hyperparameter tuning, and fine-tuning using test results for robust model performance.
• Developed and optimized CRUD operation APIs using Node.js (Fastify) and Flask (Python), improving latency and ensuring scalability.
• Implemented backend solutions with SQLAlchemy for database management, and automated workflows using cron jobs and AWS Lambda functions.
• Experienced in implementing and maintaining CI/CD pipelines to streamline deployments and ensure reliable software delivery.
• Consistently achieved service time and quality targets while maintaining strong, collaborative, and professional working relationships across teams.

• Reporting directly to the CEO.
• Responsible for all things in the engineering space including software engineering, architecture and quality assurance.
• Led a team of around 25 cross functional team members including frontend, backend and fullstack engineers.
• Aligned engineering strategies with organisation strategy through clearly identifiable OKRs.
• Introduced Team Topologies and Scrum, ensuring less hand-offs between teams and improving their efficiencies which resulted in more impactful solutions for our customers.
• Lead the technology due diligence process for an M&A decision.
• Spearheaded the re-architecture of our product from monolith to microservices, reducing technical debt and enabling expansion into new markets.
• Managed a budget of around €2m, optimising costs by introducing SaaS solutions and replacing homegrown systems.
• Negotiated vendor contracts, reducing costs by at least 10% and improving service delivery.
• Set clear expectations and goals for engineers ensuring their continued growth within the organisation.
• Technology stacks included React, Node.js, MongoDB and GCP.

• Building the strategy and managing the company.
• Consulting on cloud technologies with a focus on AWS and Kubernetes.
• Leading automation projects and CI/CD pipeline implementations.

• Supported national site migration & the software team
• Installed printers, scanners, network cabinets, antennas, etc.
• Prepared and assigned hardware
• End-user support, administrative & production migrations, stakeholder management
• Ensured workstations were operational
• Configured printers and phased out outdated devices

• Windows 10, Windows 11, Windows Server 2019/2022, Active Directory, Entra ID Group Policy, Orca, PowerShell, PSAppDeployToolKit, Intune, Office 365, Azure, Winget, SandBox
• Onsite/offsite packaging and repackaging in Intune
• Silent install / uninstall
• Use of scripting (PSADT, PowerShell)
• Distribution, planning, and monitoring of packages using Intune Admin Center
• Troubleshooting
• System monitoring
• 2nd and 3rd Level Support
• Packaging process (creation and review of installation and configuration guides, test plans, User Acceptance Testing)
• Automatic client provisioning
• Quality assurance, testing of software packages
• Workplace Engineering
• Windows Client Engineering
• Management of profiles and group policies
• Working with agile methods (Scrum)
• Use of ITSM, including as a ticket system
• Sprint planning

Projects:

Project: RWE – Development of a company-wide Zero Trust cybersecurity architecture (CITADEL) Role: Senior Enterprise Cybersecurity Architect / Zero Trust Architect Company: RWE AG Description: Concept and implementation of the strategic CITADEL cybersecurity target architecture at RWE, based on the Zero Trust architecture principle and aligned with regulatory requirements such as NIS2, ISO 27001 and company-wide security governance policies. The goal was to build a measurable, auditable and scalable security architecture with a strong focus on Identity Governance, compliance transparency and operational manageability. Responsibilities & Achievements:

• Zero Trust architecture design: Developed a company-wide Zero Trust reference architecture (Identity, Device, Network, Application, Data) including trust zones, control points and enforcement mechanisms according to NIS2.
• Identity & Access Governance (IGA): Designed and introduced IGA governance structures including role models, recertification processes, segregation of duties (SoD) and lifecycle management for identities and access.
• Security governance & KPIs: Defined and implemented security KPIs and metrics to manage Zero Trust maturity, identity risks and compliance at the management level.
• Compliance & reporting: Built standardized compliance reports and dashboards to support internal audits, external assessments and regulatory evidence (e.g. NIS2).
• Architecture & stakeholder alignment: Worked closely with Enterprise Architecture, IT operations and business units to integrate the CITADEL architecture into existing IT and security landscapes.
• Strategic security consulting: Advised programs and projects on Zero Trust compliance, identity centricity and regulatory requirements in the energy and critical infrastructure (KRITIS) environment. Technologies & Methods: Zero Trust Architecture, NIS2, Identity Governance & Administration (IGA), IAM, RBAC, SoD, Entra ID, SailPoint, Zscaler, Terraform / IaC, Policy as Code, security KPIs, compliance reporting, NIST 2.0, ISO 27001, Enterprise Security Architecture, governance frameworks, risk & control management

Project: Scalable AI Workbench Platform on Microsoft Azure Role: Cloud Architect & Engineer Company: Siemens Energy Description: Design, development and operation of a secure, modular cloud infrastructure to support Data Science, Machine Learning and AI applications for various engineering teams at Siemens Energy. Responsibilities & Achievements:

• Cloud architecture: Designed and implemented an Infrastructure-as-Code solution (Terraform) for automated provisioning of Azure resources (Resource Groups, Storage Accounts, Cosmos DB, Application Insights, networking, PostgreSQL Flexible Server, Azure Container Apps, Azure Container Registry).
• Developer portal: Used Backstage with custom frontend and backend plugins (Node.js, TypeScript, React.js, PostgreSQL, Container Apps) to enable self-service and empower developers, data scientists and AI/ML engineers.
• Role-based access control: Implemented Azure RBAC to grant targeted access (e.g. Storage Blob Data Contributor, Reader) to engineering groups (e.g. AI Engineers) for relevant resources.
• Data platform engineering: Built and configured a multi-layered storage landscape (Raw, Curated, Vector data), including automated container creation and access control for advanced analytics and AI workloads.
• DevOps integration: Integrated with Azure DevOps for CI/CD pipelines to automate deployment, monitoring and compliance.
• Security & compliance: Implemented Private Endpoints, network policies and Managed Identities to ensure data protection and regulatory compliance.
• Collaboration: Worked closely with cross-functional teams to align the cloud infrastructure with business and technical requirements and drive digital transformation at Siemens Energy. Technologies: Azure, Terraform, Azure DevOps, Cosmos DB, Application Insights, Azure Storage, Private Endpoints, Azure Synapse, Azure Machine Learning, Azure Entra ID, RBAC, Backstage, Node.js, React.js, PostgreSQL, Python (automation), Git

• Database administration and performance tuning for Oracle databases on AIX 7.1, 7.2 with Oracle 12c and 19c
• Troubleshooting and resolution on RHEL 7
• Automation of operations with UNIX/Linux shell scripts, Perl programs, and PL/SQL
• Planning, preparation, execution, and customer-specific review of changes and upgrades for the LEASMAN and DOXIS applications
• Incident handling including communication with outsourcing service providers and business units
• Data exchange with Data Pump
• Visualization of database content and monitoring results
• Configuration of databases for Debezium and monitoring Debezium activities
• Preparation of Oracle databases for migration to cloud environments
• Implementation and monitoring of NIST requirements in databases
• Automation of release upgrades for the LEASMAN application
• Creation of operations manuals and instructions
• Generation of reports for GDPR information requests

• Fund management
• Budget
• Mach BI