10/23/2026 updated

MH
100 % available

Hands-on Technical Architect | AI & Cloud Platform Engineer | Security | 13+ Years

Prag, Czech Republic
Germany +5
info: Germany, Austria, Switzerland, Belgium, Luxembourg, Netherlands
Czech Technical University, Prague, 2012, Software Engineering (Master of Science)
Prag, Czech Republic
Germany +5
info: Germany, Austria, Switzerland, Belgium, Luxembourg, Netherlands
Czech Technical University, Prague, 2012, Software Engineering (Master of Science)

Profile attachments

Marcel-Havel-x.pdf

About me

Hands-on Technical Architect with 13+ years building secure enterprise platforms in finance, energy and logistics. I design and deliver AI/LLM systems, cloud infrastructure, identity/security and distributed applications end to end. Available for B2B contracts across Europe and Switzerland.

Application Programming Interfaces (APIs)Microsoft AzureCloud EngineeringSoftware ArchitectureSolution ArchitectureTechnology ArchitectureCloud Platform SystemEvent-driven ArchitectureIT ArchitectureInfrastructure as Code (IaC)Terraform
Technical Architect | AI & Cloud Platform Engineer | Lead Engineer

Hands-on engineer and technical architect with extensive experience designing, developing and delivering secure enterprise systems, cloud platforms and distributed applications.

Core Expertise

  • Technical Architecture: End-to-end system architecture, distributed systems, microservices, enterprise integration, event-driven architecture, technical leadership.
  • AI & LLM Platforms: LLM integration, AI gateways, runtime governance, sensitive-data protection, policy enforcement, multi-provider routing, AI agent integration.
  • Cloud & Infrastructure: Microsoft Azure, Terraform, Infrastructure as Code, Azure Functions, Logic Apps, Docker, Linux, CI/CD.
  • Security & Identity: OAuth2/OIDC, Keycloak, PKCE, IAM, RBAC, multi-tenant security, application security.
  • Software Engineering: Java, Spring Boot, Python, React, TypeScript, REST APIs, WebSocket, PostgreSQL.
  • Data Engineering: Azure Databricks, PySpark, ETL pipelines, large-scale data processing.
  • DevOps: Jenkins, Git, CI/CD automation, infrastructure deployment, monitoring.

Selected Enterprise Experience

  • SAIG / Terraxon: Lead Engineer – AI governance platform architecture, security, identity and engineering.
  • Terraxon: Cloud & Platform Engineer – secure multi-tenant applications, authentication, cloud integrations and infrastructure.
  • Clearstream / Deutsche Börse: Azure Cloud Engineer & Data Engineer – Terraform, Azure security, Databricks and PySpark.
  • CEPS: Technical Architect – backend/security architecture, Keycloak, OAuth2, asynchronous microservices.
  • DHL: Senior Software Engineer / Platform Engineer – enterprise Java/React platforms, microservice modernization and technical leadership.
Focus: Hands-on technical architecture, cloud platforms, AI engineering, enterprise security and production-grade software delivery.

Experience

Professional experience10+ years
Freelancer since2012

Languages

GermanBasic knowledgeEnglishFluentCzechNative speaker

Project history

Technical Architect / Lead Engineer

Terraxon
Designed and built an enterprise AI governance platform with runtime security policies, PII protection, multi-provider LLM routing, OAuth2/OIDC, tenant isolation and audit records. End-to-end hands-on ownership across Python, React, security and cloud infrastructure.

Data Engineer

Clearstream
Converted a data science prototype into a production-grade analytics solution. Designed Azure Databricks and PySpark pipelines processing terabyte-scale financial data.

Cloud Engineer

Clearstream
Designed and implemented Azure infrastructure using Terraform, RBAC, Managed Identity, Azure Functions, Logic Apps, storage encryption and CI/CD pipelines in a regulated financial environment.

Technical Architect / Software Engineer

CEPS
Owned backend and security architecture for an energy measurement system. Designed asynchronous microservices, OAuth2/OIDC authentication with Keycloak, REST/WebSocket integration and event-driven processing.

Senior Software Engineer / Platform Engineer

DHL

Transport & Logistics

Designed and modernized enterprise logistics platforms using Java, Spring Boot, React and microservices. Led technical implementation, enterprise authentication and CI/CD automation.

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