Available for projects

I help banks, fintechs, and enterprises ship production-grade AI and cloud platforms

End-to-end delivery of compliant, scalable systems that actually work in production. From AI document intelligence to hybrid cloud architecture to regulatory reporting automation.

7+ years delivering mission-critical platforms across banking, automotive, fintech, and mobility.

Berlin-based Remote-friendly Open to relocation
Christian Wahnsiedler

Proven Results

Measurable impact from recent engagements

600K+
Emails processed annually via AI document platform
2,000+
Document types classified with high accuracy
<24h
Full bank balance sheet processing for SRB compliance
3 years
Enterprise Azure platform for Volkswagen/Cariad

How I Help Clients

I deliver end-to-end, production-ready solutions — not just architecture diagrams or isolated code. My strength is integrating AI, cloud infrastructure, DevOps, and backend development into compliant, scalable systems that work in regulated environments.

EXPERTISE PILLAR

AI Document Processing & Enterprise AI Implementation

The Problem

Your organization processes thousands of documents manually. You've seen demos of AI tools, but getting them to work reliably in production — with your security requirements, existing systems, and compliance constraints — is a different story entirely.

The Outcome

A production-grade AI pipeline that actually works: classifying, extracting, and validating documents automatically with human-level accuracy. Integrated with your existing systems (Kafka, Exchange, internal databases), secured to your compliance standards, and scaling to handle your real volumes.

Recent Result

Built an AI document platform for a major automotive client processing 600,000+ emails/year across 2,000+ document types using Google Document AI, Gemini, and Vertex AI — with full hybrid cloud architecture (on-prem Java + GCP) and enterprise-grade security.

My Approach

  • Design multi-stage AI pipelines (classification → extraction → validation)
  • Build the complete surrounding architecture — not just API calls
  • Implement enterprise security (CMEK, Private Access, IAM, Workload Identity)
  • Create reusable, modular components for rapid onboarding of new use cases

Technologies I Work With

AI/ML Platforms
Google Document AI Vertex AI Gemini Custom Models
Integration
Pub/Sub Cloud Functions Kafka BigQuery
Security & Compliance
CMEK Encryption Private Google Access Workload Identity
EXPERTISE PILLAR

Cloud Architecture & Hybrid Cloud Modernization

The Problem

You need to modernize your infrastructure without a risky "big bang" migration. Your on-prem systems work, but they can't scale. You need cloud benefits while maintaining security, compliance, and integration with existing investments.

The Outcome

A hybrid architecture that bridges on-prem and cloud seamlessly. Event-driven, highly available, with clear data flows and security boundaries. Your teams can adopt cloud incrementally while existing systems continue to run.

Recent Result

Architected and deployed a 3-year enterprise Azure platform for Volkswagen/Cariad — AKS clusters, Terraform IaC, CosmosDB, Service Bus, comprehensive monitoring, and full CI/CD automation.

My Approach

  • Design for high availability and disaster recovery from day one
  • Event-driven architectures using Pub/Sub, Kafka, Service Bus
  • Serverless compute where it makes sense (Cloud Functions, Lambda)
  • Everything as code — repeatable, version-controlled, auditable

Cloud Platforms & Services

Platforms
Google Cloud Platform Microsoft Azure AWS
Compute & Data
Cloud Functions Lambda BigQuery CosmosDB
Messaging
Pub/Sub Service Bus Kafka
EXPERTISE PILLAR

DevOps, Platform Engineering & Kubernetes Consulting

The Problem

Your deployments are manual, slow, and error-prone. Infrastructure is configured by hand. Your team spends more time fighting fires than building features. You've heard Kubernetes can help, but the learning curve is steep.

The Outcome

Production-grade Kubernetes clusters with proper networking, autoscaling, and monitoring. All infrastructure codified in Terraform. CI/CD pipelines that your team can actually use. GitOps workflows that make deployments safe and repeatable.

Certification

Certified Kubernetes Application Developer (CKAD) — plus hands-on experience running production AKS, EKS, and GKE clusters for enterprise clients.

My Approach

  • Design cluster architecture with proper networking and security boundaries
  • Implement GitOps workflows with Helm and proper secrets management
  • Set up comprehensive monitoring with Prometheus and Grafana
  • Codify everything in Terraform for repeatability and auditability

DevOps Stack

Container Orchestration
Kubernetes AKS EKS GKE Docker
Infrastructure as Code
Terraform Helm
CI/CD
Azure DevOps GitHub Actions Cloud Build Jenkins
Monitoring
Prometheus Grafana Application Insights
EXPERTISE PILLAR

Enterprise Backend Development & Regulatory Reporting

The Problem

You need to process massive data volumes under strict regulatory timelines. Your legacy systems are holding you back. You need high-performance batch processing that's also maintainable, testable, and compliant.

The Outcome

Robust backend services with clean architecture, comprehensive testing, and proper observability. Batch processing systems that can handle your real data volumes within regulatory windows. Code that your team can actually maintain and extend.

Recent Result

Built an SRB/ECB regulatory reporting platform for a major European bank — processing entire balance sheets in under 24 hours using Spring Batch, DB2, with comprehensive validation and audit trails.

My Approach

  • Clean architecture with proper separation of concerns
  • Comprehensive testing with JUnit and Mockito
  • High-performance SQL and batch processing optimization
  • Built-in audit trails and compliance controls

Backend Stack

Java Ecosystem
Java 8-21 Spring Boot Spring Batch Maven
Databases
PostgreSQL DB2 Oracle MySQL
Testing
JUnit Mockito Integration Testing

How We Can Work Together

Flexible engagement models designed around your project needs. Whether you need hands-on delivery, strategic guidance, or ongoing support.

TIME & MATERIALS
€1,200/day

Best for exploratory work, advisory, or projects with evolving scope.

  • Flexible scope adjustments
  • Architecture advisory
  • Team augmentation
FIXED PRICE
Custom

Best for well-defined deliverables with clear requirements.

  • Predictable budget
  • Clear deliverables
  • End-to-end ownership
HYBRID
Flexible

Fixed price for core deliverables, T&M for additional scope.

  • Best of both models
  • Room for discovery
  • Long-term partnerships

Also open to full-time senior roles for the right opportunity.

Let's Discuss Your Project

Selected Experience

7+ years delivering mission-critical platforms for enterprise clients

2026 - Present

Senior IT Consultant

Deloitte GmbH
AI Document Processing Platform for Automotive Client
600K+
emails/year
2,000+
document types
Document AI Gemini Vertex AI Terraform GCP Hybrid Cloud
2025

Senior IT Consultant

Deloitte GmbH
SRB/ECB Regulatory Reporting Platform for Major European Bank
<24h
processing time
Full
balance sheet
Spring Batch DB2 Java SRB Compliance
2022 - 2025

IT Consultant

Volkswagen AG / Cariad
Enterprise Azure Platform for Automotive Mobility Services
3 years
engagement
Azure AKS Terraform Java 17/21 CosmosDB
2019 - 2021

Earlier Roles

Hypoport, Uber, Finanz Informatik
Foundation in fintech, data engineering, and cloud infrastructure
AWS Spring Boot Python Data Engineering

Certifications

Certified Kubernetes Application Developer (CKAD)

AWS Certified Solutions Architect - Associate

Microsoft Certified: Azure Fundamentals (AZ-900)

AWS Certified Cloud Practitioner

Education

2021

B.Sc. Business Computing

University of Applied Sciences Berlin
Grade: 1.65

Languages

German (Native) English (Fluent)

Ready to Talk?

Let's discuss how I can help with your AI, cloud, or platform engineering challenge.

Book a free 30-minute discovery call — no commitment, just a conversation about your situation.

christian.wahnsiedler@gmail.com
+49 173 412 5665
Berlin, Germany (Remote-friendly)