Amazon Web Services Experts in Düsseldorf

• Led end-to-end delivery of ML/AI applications for the QuantistryLab simulation platform, from requirements definition and solution design to development, testing, deployment, and production support, coordinating efforts across back-end, DevOps, and ML teams
• Designed and implemented a compound search system with an open-weights LLM, the Pydantic AI agent framework, and the Model Context Protocol (MCP), exposing it through FastAPI endpoints
• Deployed and configured vLLM-based LLM serving on Kubernetes
• Built CI/CD pipelines and Helm charts to automate deployments across staging and production environments
• Instrumented the search system with OpenTelemetry spans and traces, integrating with the Honeycomb observability platform to monitor component-level latency and functional errors
• Developed a custom evaluation dataset and implemented evaluations for retrieval relevance, answer correctness, tool-call accuracy, and end-to-end task success
• Reduced infrared spectrum prediction time by 83% (from 60 to 10 minutes) by replacing a quantum-mechanical model with a pretrained graph neural network; fine-tuned the model using PyTorch, built and containerized the inference pipeline with Docker, and integrated it into the platform
• Implemented an MLflow model registry with MinIO-backed artifact storage
• Advised sales and science teams on ML/AI applications for prospective client projects, providing technical expertise to shape proposed solutions and prototypes

Technologies: AWS, Hetzner, Kubernetes, Helm, Docker, vLLM, Pydantic AI, MCP, Qwen, Llama 3, MLflow, MinIO, GitHub Actions, Python, FastAPI, OpenTelemetry, Honeycomb, PyTorch, Polars, pytest

• Supporting the DevOps team in Terraform-managed, multi-region AWS infrastructure to achieve environment parity.
• Developed end-to-end CI/CD pipelines using AWS CodePipeline, CodeBuild, and CodeDeploy, automating the build and deployment.
• Maintained pre- and post-deployment scripts to automate critical tasks such as database schema migrations and environment sanity checks.
• Implemented CI/CD flow specifically for hotfixes via separate Git branches, managing back-merge activities from feature branches to release branches to ensure code integrity through automated conflict resolution.
• Deployed a dedicated, lightweight sanity check application hosted cost-effectively on Azure Container Apps to run automated health and basic functional checks as a post-deployment activity triggered via pipeline.
• Investigated production incidents through code changes and AWS CloudWatch logs.
• Coordinated integration of Dynatrace APM and its APIs for monitoring purposes.
• Full stack QA strategist for a high-traffic e-commerce platform built on a layered architecture for the back-end testing of core platform services, especially the order management system in Zed and Glue layers.
• Managed automation activities, testing process, and refactoring practices.
• Responsible for framework migrations, setup, and training for new automation frameworks.
• Promoted a shift-left approach within the QA team and created the test concept.
• Participated in meetings with IT managers, business owners, product owners, and team members.
• Designed and implemented contract testing to validate API schema compatibility between the order management system and the Zed and Glue layers, reducing production-relevant breaking changes by approximately 3%.
• Led the migration to a multi-environment framework that enabled test execution across 4 country configurations from a single codebase.
• Integrated automated unit and functional tests directly into the GitLab CI/CD pipeline, reducing pipeline runtime by 32%.
• Coached and trained 5 QA engineers across Germany and Hungary in test automation, framework architecture, and best practices.
• Architected a layered backend test automation framework separating business logic, API request builders, and the database layer.
• Piloted AI-assisted testing with Playwright Agents, the Playwright MCP Server, and GitHub Copilot for automated test generation, execution, and self-healing Playwright scripts.

• Led end-to-end delivery of complex international customer-facing IT and system transformation projects across mobility, retail, life sciences, and product development domains.

• Managed project opportunities and delivery initiatives from concept development, planning, execution, migration, validation, deployment, and final customer acceptance.

• Acted as the primary point of contact for project stakeholders, ensuring alignment between customers, business units, suppliers, and delivery teams.

• Ensured timely project execution through proactive monitoring of milestones, deliverables, dependencies, risks, and resource requirements.

• Led and coordinated global cross-functional teams of 20+ members across multiple time zones. Served as the central coordination point for project activities, ensuring accountability, milestones, progress tracking, and timely resolution of issues across multiple stakeholders. Managed status reporting with all the stakeholders, providing clear and timely updates to ensure alignment on project goals.

• Provided functional leadership, mentoring, coaching, and issue resolution support to project team members. Worked closely with senior leadership and executive stakeholders to define project charter and project scope, priorities, milestones, manage dependencies, success criteria and achieve project goals.

• Collaborated closely with senior leadership, business stakeholders, suppliers, operations teams, and external partners to define project objectives and ensure successful execution.

• Managed stakeholder communication through executive dashboards, KPIs, governance reviews, steering committee meetings, and project status reporting.

• Anticipated business needs and provided effective technical solutions in a timely manner to improve business satisfaction.

• Led and supported sub-project management structures, ensuring consistent execution, reporting, and escalation across complex initiatives.

• Managed supplier relationships and service providers to ensure compliance with contractual obligations, service levels, timelines, and quality expectations.

• Supported vendor selection processes, RFP evaluations, delivery governance, cost monitoring, and performance reviews.

• Controlled project budgets, forecasts, resource allocations, and financial tracking to ensure delivery within approved constraints.

• Scheduled workshops explaining the business requirement, prioritizing project goals and managing change.

• Oversaw cloud migrations (Azure/ AWS), database migrations/upgrades, system upgrades, infrastructure & application modernization, data management, legacy decommissioning initiatives, AI solutioning, transition plan of 2000+ applications etc.

• Coordinated execution, deployment, integration, commissioning, data migration and handover activities to ensure production readiness.

• Led a cross-functional team proactively managing dependencies and resolving project issues to closure, while maintaining delivery timelines.

• Proactively managed project risks, dependencies, issues, change requests, and escalations to ensure predictable project outcomes.

• Ensured compliance with GxP, ITIL, corporate governance standards, validation requirements, and audit controls.

• Led internal and external audit support activities, validation documentation, CAPA coordination, and regulatory compliance initiatives.

• Drove process standardization, automation, and governance improvements across project delivery functions.

• Led application rationalization initiatives resulting in the retirement of more than 50 legacy applications, improving operational efficiency and reducing maintenance costs.

• Currently driving Generative AI initiatives to automate project documentation, reporting, knowledge management, and delivery processes.

• Facilitated lessons learned workshops and implemented continuous improvement actions to enhance project execution effectiveness.

(Maternity/Parental Leave: July 2023 – Aug 2024)

• Domain: Payment Domain | Client: Telefonica Germany
• Project: General Payment Service

The General Payment Service is responsible for processing of online payments via external payment service provider like Safer pay and PayPal

• Developed Design of Use (DOU) and interface contract documentation, ensuring clarity and compliance across system integrations
• Designed and delivered REST/SOAP web services with Spring Boot and Spring Data JPA, publishing Swagger contracts through WSO2 API Gateway to improve accessibility and governance.
• Spearheaded the on-premises to AWS Cloud migration, re-platforming from Oracle to PostgreSQL on AWS RDS and deploying services on EC2, improving scalability and cost efficiency.
• Containerized microservices using Docker and orchestrated deployments with Kubernetes, streamlining deployment pipelines and improving system reliability.
• Implemented proactive monitoring and logging via AWS CloudWatch and Kibana, ensuring stability and performance during cutover.
• Enhanced collaboration through code reviews and peer reviews, promoting maintainability and clean coding standards.
• Strengthened quality by writing comprehensive JUnit tests and preparing detailed test cases enabling early defect detection
• Delivered automated API testing with Ready API, Postman, and SOAPUI, and conducted performance testing with JMeter, ensuring reliability in high-transaction environments.

• Analysis and remediation of security vulnerabilities in a risk assessment system for energy trading
• System analysis
• Threat modeling
• Decision-making on vulnerability mitigation strategies
• Implementation of vulnerability detection mechanisms
• Security scans
• DevSecOps practices
• Technical environment: Visual Studio Code, JetBrains Suite, MS Threat Modeling Tool, DevSecOps, Git, AWS, DynamoDB, SQL Server, Endur, Snowflake, Orca
• Languages: C#, JavaScript, TypeScript, Python, PowerShell, Bash, Terraform, SQL

• Identification of requirements (legal, organizational, and technical)
• Design of solution architectures
• Evaluation of concepts and technologies
• Preparation of decision templates
• Architectural Decision Records (ADR)
• Coordination of implementation
• Review of implementations
• Documentation

• Consulting on CRM processes and features
• AI infusion workshops to introduce AI apps for critical business processes
• Prototyping – vibe coding with Lovable
• Developing several apps for global bid management in a CPQ, Salesforce and SAP 4 Hana environment
• Requirements and process management
• Introducing a new data governance model
• AI infusion – supporting apps and business processes with AI applications
• Portfolio management of AI ideas: identifying and selecting AI projects in bid management
• Prototyping AI projects with Lovable.dev
• Building an AI data foundation in Snowflake
• Blueprint for various business units and global rollout
• An agile prototype-first approach using Design Thinking and vibe coding to prototype all applications
• Presentation at a global conference on the use of AI in business and validating ideas with Design Thinking & vibe coding
• AI infusion workshops at global conferences to prototype ideas with business stakeholders

• Migration of backups and complete workloads to AWS and Azure, including setup and management of AKS & EKS clusters.
• Automation with Terraform & ArgoCD, CI/CD pipelines implemented with GitLab.
• System monitoring on OpenShift 4 (on-premise) with Grafana & Prometheus, use of CloudWatch and X-Ray for analysis and logging.
• Building and maintaining secure network infrastructures (VPCs, SGs, WAF, ACLs), integration of Azure Log Analytics.
• Close collaboration with infrastructure and development teams, maintenance of technical documentation with Confluence, ticket handling via Jira, and promoting cloud knowledge within the company.

• DORA consulting and system optimization
• Process analysis of existing business processes that are complex from both a business and technical point of view
• Analysis of the individual business processes in the relevant business areas Trading, Back Office, Settlement, Custodian Bank
• Interface between the business units and IT to understand and define requirements
• Creation of a business concept incl. adjustments and implementation of software applications and their interfaces to the systems
• Preparation of a decision template for the management board for project approval
• Setting up and running project meetings with the relevant stakeholders and documenting them
• Close collaboration with the stakeholders
• Coordination and control of the analysis
• Creation and planning of resources and budget
• Onboarding of large banks (Asia and Eastern Europe) for Depot B
• Migration of portfolio holdings (volume around EUR 70-100 million)

• Designed and developed the architecture of an enterprise SCM/CI platform for Kubernetes-native delivery and GitOps workflows.
• Implemented infrastructure automation and Vault & IAM integration for secure, compliant pipelines.
• Coordinated cross-functional teams to improve DevOps, security, and architecture in release processes.
• Increased platform adoption and developer experience by automating onboarding and artifact pipelines.

• Design and implementation of a system for controlling the complete process of installing, removing, and replacing electricity meters by external service providers for an energy supplier

• Automated retrieval of orders and available devices through defined interfaces (e.g. from SAP)

• Orchestration of the process steps (assignment of meters, processing of meter data, transfer of updated information back to the source system) through a Spring-Boot backend

• Provision of a React-based web client for operational tracking and control of orders, e.g. to continue failed process steps or resend notifications

• Founded technology consulting practice delivering business strategy & operations, digital transformation, and enterprise tech & innovation services to telecommunications, cybersecurity, and IT enterprise clients, leveraging 15+ years of Fortune 500 sector expertise
• Developing digital transformation and modernization strategies for legacy system optimization, cloud-native implementations, and operational process enhancement using proven PRINCE2 and agile methodologies
• Building consulting frameworks for project & product management, portfolio governance, and business coaching services while establishing initial client relationships in EMEA markets

The Helaba ATLAS project aims to modernize core systems and make them future-proof. As part of the subproject, the existing legacy system for international payments is being replaced by a modern web-based application.

• Analysis of functional and technical requirements
• Analysis and optimization of business processes
• Process modeling
• Preparation and facilitation of workshops
• Defining project scope and prioritizing requirements
• Business process management (analysis, modeling, and optimization)
• Specification of user stories
• Designing business and authorization concepts
• Testing and acceptance
• Designing mockups in Figma
• Creating the UI/UX style guide for web applications Approach: Scrum (agile) Technologies: Jira, Confluence, MS Teams, Conceptboard, Java, Vaadin, Figma

• Design and implementation of an OCI-based DWH and ETL system to replace legacy mainframe applications
• Development of a database optimization strategy and planning the rapid conversion of JCL and COBOL routines to PL/SQL with the help of AI
• Development of an Oracle Apex-based app for internal administrative processes in the public sector (office equipment, employee training)
• Implementation of PL/SQL workflows for approval processes and creation of a responsive mobile version with JavaScript and CSS
• Use of Azure DevOps for backlog and documentation, as well as Git for version control
• Development of REST interfaces for CRM systems
• Replacement and reprogramming of Oracle Forms screens with Oracle Apex and upgrading to the latest Apex versions
• Design of a Git branching strategy and conducting code reviews
• Maintenance and further development of an EDI-based data exchange system based on Oracle Advanced Queuing for the public sector in Austria
• Data analysis and creation of charts in the Oracle Apex frontend; installation of standalone ORDS and Apex 23.1
• Agile working according to the Spotify Model; development of complex Apex screens with the support of Oracle JET
• New development and customization of existing PL/SQL packages, workarounds for database version differences and query optimization
• Development of Apex applications for broker pools to manage and optimize Oracle databases in the banking sector, including SSO-based authorization systems with OAuth2 and Keycloak
• Development of extensive Oracle Apex applications for BI and data mining modernization projects, as well as development of manual and automated projection methods in the frontend
• Implementation of data warehousing projects in the banking sector and use of Scrum and Kanban in team-oriented projects