Amazon Web Services Experts in Cologne

Hooman Behmanesh

Fullstack Developer

Cologne

Last position:

Fullstack Developer at Möbel Roller GmbH

Further development of the existing e-commerce platform based on SAP Commerce (Hybris) to meet the growing demands of digital commerce.
Ensuring the scalability and performance of the backend, so the platform remained stable and efficient even under heavy user load.
Development and integration of new OCC REST APIs and services for modular extensions and flexible adjustments, to implement new features quickly.
Optimization of data flows and interfaces, which significantly improved platform efficiency and system performance.
Ensuring a maintainable and scalable code base by using Clean Code principles, proven design patterns, and a future-proof architecture.
Reduction of errors through extensive testing with JUnit, Mockito, and load tests with Gatling, supported by the introduction of automated test processes.
Improved system performance through targeted refactoring measures and efficient database queries, especially to handle peak loads.
Use of modern cloud and monitoring tools such as Kubernetes, Google Cloud Platform (GCP), and Grafana to ensure a stable and monitored infrastructure.
Clear improvement in efficiency, scalability, and reliability of the platform, which now meets the demands of a dynamic and growing e-commerce market.

Burhan Dinler

Experienced IT and AI Architect

Niederkassel

Last position:

Enterprise Architect & Solution Architect at DB Netz AG

With project PRIZMA, DB will modernize its infrastructure on the one hand, and develop a fail-safe IT landscape on the other hand, which can be restored quickly and securely in case of a disaster.

Capture current architectures of existing systems as well as methodical consulting and development of target architectures
Deepen and maintain the building plan / target IT landscape
Implement technical architecture concepts & architecture descriptions
Implement migration concepts for updating and further developing the platform and information systems
Assess submitted improvement suggestions as part of the project
Capability management: identify capability gaps, develop target visions, and support transformation planning within the enterprise architecture.
Create a compatibility matrix of the components in use and compare dependencies of specific versions
Create an IT concept for extending the platform with the following topics: hardware and software requirements, security, licensing, high availability, load balancing, backup & recovery, update strategy, monitoring integration, etc.
Coordinate with business architects as well as technical architects from the cross-functional architecture area of the PRISMA program for the topics (backup, Active Directory, monitoring, Citrix, and business applications ...)
Status meetings and alignment of project planning with the Release Train Engineer / Project Manager
Advise the Release Train Engineer / Project Manager in identifying project risks
Advise the System Architect Engineers in steering the implementation of the concept
Implement the IT concept
Document the infrastructure

Label: MS Project, LINUX, Windows, ORACLE, Java, REST, SharePoint, Microsoft Exchange, UML, Enterprise Architect, BPMN, AZURE, AWS, V-MODEL, Micro Service, VisualStudio, SAP S/4HANA, SCRUM(SAFE), ESB (TIBCO), Python, Innovator, LeanIX (TOGAF), Ansible, Ansible Tower, Ansible Automation, ROBOT, SpringBoot

Halil Oeztoprak

Principal Cloud & DevSecOps Architect (AWS / Azure / Terraform / Kubernetes / CI-CD)

Last position:

Senior Cloud Operations & DevSecOps Engineer (Azure / Terraform / CI-CD) at KfW Bankengruppe

Regulated environment within a German banking group (approx. 8,500 employees, hybrid cloud strategy).
Responsible for operating, provisioning, and continuously securing business-critical platforms – including a GenAI chat application, a big data/AI platform, and data science workspaces based on Azure Virtual Desktops and VMs. Ownership of Azure DevOps projects for ShaiHulud and React2Shell, as well as BSI alerts – Security Operations improvements across the SDLC.
Deployment responsibility for the GenAI chat application, big data/AI platform (BDAI), and data science workspaces (AVD/VM-based) in the respective landing zones.
Deployment & release management: end-to-end responsibility for deploying portal and service applications across multiple Azure landing zones, including technical approvals, compliance with development team deployment guidelines, and ensuring ITIL-based change and release processes via ServiceNow.
Azure landing zones & network architecture: design, provisioning, and operation of Azure landing zones for 3-tier web applications with enhanced network segmentation, VNet peering, hub-and-spoke architectures, private endpoints, and firewall integration across separate subscriptions and tenants.
Azure DevOps governance & operations: ownership of the Azure DevOps organization, including projects, repositories, and CI/CD pipelines; implementation of governance requirements such as branch policies, approval gates, permission models, and audit-ready operating structures.
Infrastructure as Code (Terraform): design, implementation, and operation of a modular Terraform architecture for standardized cloud infrastructure deployment, including state management, provider versioning, reusability, and policy-as-code approaches.
CI/CD pipeline engineering: design, operation, and optimization of complex YAML-based CI/CD pipelines with multi-stage deployments, template standardization, self-hosted agents, integrated secret management, and automated quality and security checks.
Git migration & platform consolidation: planning and execution of repository and pipeline migration from Azure DevOps to GitLab CI/CD, including automated scripts, full Git history transfer, pipeline porting, and platform consolidation.
Container & platform operations (AKS): operation and security assessment of containerized workloads on Azure Kubernetes Service, centralization of on-premises container registries for ACR.
OpenShift (OCP) security reviews: security assessment of code baselines, build pipelines, and deployment processes for on-premises OpenShift clusters with critical applications, and derivation of specific hardening recommendations.
Shift-left security & DevSecOps transformation: introduction of a company-wide shift-left approach for early security integration in development and deployment processes, enabling developers to perform self-led security checks and sustainably reduce vulnerabilities before production (IDE integrations, pre-commit hooks, local scanners).
Software supply chain security: analysis and mitigation of supply chain risks in NPM- and Yarn-based applications through dependency audits, CI/CD pipeline hardening, token rotation, and restriction of risky build and lifecycle mechanisms.
Frontend & framework security (React / Next.js): security assessment and coordination of critical vulnerability remediation across platform applications and web frameworks, including coordination and complementary technical mitigations with all teams following BSI alerts.
Software composition analysis (SCA): introduction and operation of automated vulnerability scans for container images, pipelines/artifacts, and third-party dependencies, including SBOM exports within CI/CD pipelines.
SAST/DAST integration: design and piloting of static and dynamic application security tests in close collaboration with security architecture and development teams, for continuous improvement of code and runtime security, and establishing operational acceptance tests.
Artifact & registry consolidation: analysis and consolidation of all package and container repositories for service applications and AKS workloads, aiming for a centralized, secured registry strategy with centralized vulnerability scanning and governance.
Dependency-Track & SBOM strategy: advising the compliance board on introducing a central SBOM and vulnerability management platform to increase enterprise-wide dependency transparency and accelerate CVE response capability.
CI/CD pipeline hardening: security analysis and cleanup of the existing pipeline landscape by removing unused pipelines, improving secrets hygiene, implementing least-privilege principles, and isolating build agent environments.
Azure Web Application Firewall (WAF) optimization: analysis and tuning of existing Azure WAF rules (OWASP Top 10 Core Rule Set, DSR/SDC, custom rules) to defend against known vulnerabilities and exploit patterns, including reducing false positives and improving threat detection.
Documentation & stakeholder communication: creating and maintaining technical documentation, runbooks, and architecture overviews in Jira and Confluence, as well as active knowledge transfer between operations, development, security, and compliance stakeholders.

Nenad Biresev

Freelance Computer Vision Engineer

Last position:

Safety Video Analytics Project for Airbus at Airbus

Developed a real-time video analytics proof-of-concept for deployment on NVIDIA Jetson edge devices.
Implemented DeepStream pipelines including object detection, tracking, human pose estimation, face anonymization, and zone intrusion detection.
Built a Qt/Python demonstration UI interfacing with the AI pipeline via REST APIs.

Hamdi Rajab

Lead Full-Stack Developer & Solution Architect

Last position:

Full-Stack AI Developer at Karray-Pflege GmbH

PFS-Matching-App

Integrated an intelligent LLM chatbot using LangChain4j, enabling conversational AI, context-aware question answering, document summarization, and autonomous tool execution.
Implemented Retrieval-Augmented Generation (RAG), prompt engineering, and AI agent workflows to connect large language models with enterprise data and backend services.
Developed RESTful APIs and secure backend services to support AI-driven interactions and business processes

Beshr Alnirabieh

Data & Business Analyst | Business Intelligence | AI & Automation

Last position:

System Administrator – HealthCare IT & Data Infrastructure at Cellitinnen Hospital Association

Integration of medical modalities (including ultrasound) into the existing IT infrastructure (DICOM, HL7) – put into operation within the planned timeframe.
Administration and optimization of PACS systems for efficient archiving and distribution of radiology image data across multiple locations.
Ensuring consistent data quality and seamless interoperability in data exchange between HIS, RIS, and PACS.
Close collaboration with medical staff to analyze and digitally optimize clinical workflows.
Requirements management and test coordination when implementing clinical requirements in complex IT structures.

Baris Ekici

Senior Cyber Security Consultant | Cyber Defense, DFIR & Security Architecture

Cologne

Last position:

Founder / Product & Security Architect at Pirpirik

Perform secure code reviews and provide secure-coding guidance across the application and platform architecture.
Engineer infrastructure security and design security-monitoring architecture, incident-response playbooks and Security-by-Design controls.

Fahad Razzaq

AI Platform Engineer | MLOps | Kubernetes | Cloud Infrastructure

Last position:

Data Science – Operations Optimization at Netto-marken

Project: Digitalization of Warehouse Processes | Building a Data Analytics Platform.

Built a web-based workforce allocation system that digitized daily shift planning by matching worker expertise to operational zones, replacing manual coordination with a structured workflow adopted across the site, saving supervisors time on daily planning.
Developed a real-time operational visibility dashboard giving supervisors a live view of task throughput and outstanding workload across warehouse zones throughout the day, helping reduce overtime and idle labour costs.
Developed a slotting optimization solution to improve warehouse picking efficiency and reduce picking time per order, working directly with operations teams from concept through production deployment.

Technologies used: Python, Django, PostgreSQL, Pandas, NumPy, HTML, Java, JavaScript, Docker, Kubernetes, AWS, Power BI, GitHub Actions CI/CD, GitOps, Claude, OpenAI

Maurice Knopp

Senior Solution Architect

Cologne

Last position:

Solution Architect – Cloud-Native Transformation of IoT Monitoring Platform at NDA / Wind Energy Sector

Led the end-to-end architecture and migration of a legacy on- premise IoT monitoring system to a cloud-native Azure platform within a 17-member development team
Designed and implemented a scalable microservices architecture (Java 21, Spring Boot, Kubernetes, Azure Services), decoupling IoT data streams and eliminating legacy system bottlenecks
Defined technology stack, mentored developers, and orchestrated cross-functional teams in 4 countries to ensure high-quality delivery and alignment with architectural standards
Drove requirements engineering and system redesign, removing years of technical debt and introducing event-driven processing and automated workflows
Key Achievements
Increased system stability and uptime by ~10x, eliminating need for 24/7 DevOps intervention
Reduced hosting costs by ~80% (5x savings) through cloud optimization
Improved performance and scalability, enabling stable handling of high-volume IoT data streams
Delivered successful zero-disruption migration from on-prem to cloud, with strong user satisfaction and reliability from day one

Alexander Rautzenberg

IT Consultant

Monheim am Rhein

Last position:

Business Analyst at Financial Services Provider Landesbank

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

Emmanouil Tzouridis

Senior Analytics Engineer

Köln

Last position:

Senior Analytics Engineer at Trade Republic Bank GmbH

Implementation of analytics and automation solutions for the Anti Financial Crime business unit
Providing the infrastructure, including reusable data models and feature ingestion for production ML and rule based models in the areas of Account Take-Over and Card fraud detection, as well as Customer Risk Assessment
Tools used: Snowflake, dbt, Looker, AWS, Python, Airflow, Metaflow

Yannick Tessa

Cloud Architect

Bergisch Gladbach

Last position:

Cloud Architect at Anonymous

Implementation of Infrastructure as Code (IaC) with Terraform to ensure a scalable, repeatable, and secure Azure infrastructure
Implementation and optimization of CI/CD pipelines with Azure DevOps
Management of container and server environments and AKS

Markus Glagla

Full Stack Developer

Frechen

Last position:

Full Stack Developer at REWE Digital

A warehouse valuation system was reimplemented using Java, Spring Boot, and Camunda. The backend solution focuses on integration and batch calculations, the frontend on managing formulas and reviewing results.
Java 21
Spring Boot
JPA
Maven
REST
Kafka
PostgreSQL
DB2
Liquibase
Google Cloud Storage
Keycloak
GitLab CI/CD
Helm
Terragrunt
SonarQube
Angular
IntelliJ
JUnit 5
Mockito
Open API

Valeri Milke

Associate Partner - Information Security Consulting

Last position:

Associate Partner - Information Security Consulting at Insentis GmbH

Improvement of the Information Security Management System (ISMS) based on ISO 27001, NIS2, DORA, B3S, TISAX and BSI IT Baseline Protection
Conducting comprehensive gap analyses to identify gaps and derive action plans according to the above standards and regulations; management and KPIs
Data Loss Prevention strategy and implementation using MS Purview
Vulnerability and patch management, security monitoring
Risk analysis and threat modeling using the STRIDE methodology
Development of vendor risk assessments, implementation of risk classifications, conducting supplier assessments and implementing technical monitoring solutions (e.g. Security ScoreCard)
Securing cloud environments (AWS and Azure); expertise in CSPM/CNAPP (Wiz), cloud migration, secure CI/CD pipelines, container security and best practices in AWS, Azure and Office 365
Application security: penetration testing, DevSecOps, OWASP, pre-commit hooks, key and secret management, IDE plugins, static source code analysis, dependency checks, container scanning, vulnerability management, CIS benchmarks and compliance
Security assessment and hardening according to CIS benchmarks and cloud conformity in AWS, Office 365 and Azure

Christian Hunkirchen

Developer