Christian Kappen, Senior Cloud & Platform Engineer auf www.freelancermap.ch

Senior AWS Cloud Engineer - Banking & Security

Sopra Financial Technology GmbH, Nürnberg

Banken und Finanzdienstleistungen

250-500 Mitarbeiter

• Architected and standardized a unified AWS network and security architecture

across 45 AWS accounts, enabling consistent governance, connectivity, and compliance

for enterprise customer environments.

• Designed and operated a multi-cluster AWS EKS platform supporting production

workloads, significantly improving scalability, availability, and operational reliability.

• Implemented a GitOps delivery model using ArgoCD and Helm, enabling fully automated,

auditable deployments and reducing manual release errors.

• Automated infrastructure provisioning using Terraform and Terragrunt at scale,

reducing environment setup time by up to 70% and eliminating configuration drift.

• Established enterprise-grade backup and disaster recovery strategies with Velero

and AWS Backup, ensuring reliable multi-cluster recovery and business continuity.

• Introduced Rancher as a self-service Kubernetes platform, accelerating developer

onboarding while maintaining centralized security and governance.

• Delivered consistent, high-quality outcomes as part of a 5-person AWS Solutions

Architecture team, resulting in three consecutive contract renewals.

Lead Cloud Architect (AWS) - HR & Security

aconso AG, Bielefeld

Internet und Informationstechnologie

50-250 Mitarbeiter

• Designed and delivered a secure, highly available AWS-based cloud infrastructure

serving enterprise customers with isolated, customer-specific environments.

• Acted as technical coach and trainer, upskilling engineering teams on cloud architecture,

security best practices, and operational excellence.

• Partnered directly with executive management and the CTO to support enterprise

customer engagements, clearly explaining and defending advanced security architectures

and implementation decisions.

• Defined and implemented enterprise-grade security controls, including SIEM, encryption,

and access logging, meeting strict customer and compliance requirements.

• Built and operated a containerized platform using AWS ECS with both EC2 and

Fargate, balancing cost efficiency, scalability, and operational flexibility.

• Led the migration from CloudFormation to Terraform with Terragrunt, significantly

improving infrastructure scalability, reusability, and long-term maintainability.

• Implemented blue-green deployment strategies via GitLab CI, enabling zero-

downtime releases and safer production deployments.

• Improved application scalability and availability through AWS Load Balancers, ensuring

consistent performance under varying workloads.

• Established comprehensive monitoring and observability with Datadog, enabling

proactive incident detection and performance optimization.

• Delivered a highly reliable and secure platform that became a core component of

the company’s digital and enterprise offerings

Lead Cloud Architect (AWS) - Healthcare & Security

Cura4You GmbH, Wachtberg

Pharma und Medizintechnik

10-50 Mitarbeiter

• Led the end-to-end design and implementation of a secure cloud infrastructure

from scratch, supporting a healthcare platform processing highly sensitive medical

data.

• Architected and operated multiple AWS ECS and AWS EKS clusters hosting a large-

scale microservices architecture, ensuring scalability, reliability, and operational

consistency.

• Standardized Docker-based development and runtime environments, aligning

local, staging, and production setups to reduce integration issues and deployment

friction.

• Delivered a high-performance frontend architecture using Amazon CloudFront and

S3, optimizing global content delivery, scalability, and user experience.

• Implemented blue-green deployment pipelines using GitHub Actions, integrating

automated testing to enable zero-downtime releases and significantly improve application

stability.

• Established comprehensive monitoring and observability with Datadog, enabling

proactive issue detection across the full application and infrastructure stack.

• Built and managed highly available data layers using multiple AWS Aurora MySQL

8.0 clusters and AWS ElastiCache Redis clusters.

• Ensured continuous compliance with GDPR, BSI, PCI, and ISO 27001, embedding

security and regulatory requirements directly into infrastructure and deployment

processes.

• Provided fully isolated development, staging, and local environments for engineers

and product owners, accelerating development velocity and improving cross-

team collaboration.

Lead Cloud Architect (AWS) - High Availability & Compliance

PlanA.Earth GmbH, Berlin

Energie, Wasser und Umwelt

50-250 Mitarbeiter

• Led the migration of an organically grown AWS environment to a highly available,

production-grade cloud architecture, significantly improving reliability, scalability,

and operational resilience.

• Took full ownership of stabilizing and modernizing AWS infrastructure in a high-

growth startup (>40M€ funding) amid frequent team changes and limited prior

infrastructure stewardship.

• Architected and operated high-availability data layers using multiple AWS RDS

MySQL 8.0 clusters and AWS ElastiCache Redis clusters, improving performance and

data consistency.

• Designed and implemented blue-green deployment pipelines using GitHub Actions,

enabling zero-downtime releases and safer production rollouts.

• Built and supported local development environments and CI/CD pipelines, accelerating

developer productivity and reducing deployment friction.

• Played a key role in the company’s ISO 27001 and SOC 2 certification initiatives,

contributing to security controls, asset monitoring, and audit readiness.

• Implemented continuous asset and compliance monitoring using Vanta, improving

visibility into infrastructure security posture.

• Delivered a scalable container platform using AWS ECS with EC2 and Fargate, balancing

cost efficiency, scalability, and operational simplicity.

• Improved application availability and traffic management through AWS Load Balancers,

ensuring consistent performance under load.

Lead Cloud Architect (AWS) - Migration & Platform Modernization

Schüttflix GmbH, Gütersloh

Architektur und Bauwesen

50-250 Mitarbeiter

• Led a full-scale migration from DigitalOcean to AWS, significantly improving scalability,

reliability, and long-term robustness of the cloud infrastructure.

• Modernized the application platform by replacing an outdated Rancher setup,

stabilizing and streamlining web, frontend, and backend service operations.

• Designed and implemented golden AMIs, enabling ultra-fast, repeatable deployments

and supporting highly agile release cycles.

• Migrated multi-terabyte object storage from DigitalOcean’s S3-compatible storage

to AWS S3, improving durability, performance, and operational maturity.

• Established secure remote access via VPN, enabling safe and controlled infrastructure

access for distributed engineering teams.

• Introduced advanced monitoring and alerting using AWS CloudWatch and New

Relic, enabling proactive detection and faster incident response.

• Designed and implemented blue-green deployment strategies, minimizing downtime

and reducing risk during production releases.

• Built CI/CD pipelines to support efficient development workflows, including automated

pipelines for iOS and Android application builds.

• Implemented comprehensive backup and recovery strategies, improving data protection

and operational resilience.

• Ensured a smooth operational handover to a dedicated Site Reliability Engineer,

maintaining continuity and long-term platform stability.

• Achieved four consecutive contract renewals, reflecting strong delivery impact and

sustained stakeholder confidence.

Lead Cloud Architect (AWS) - Migration & Platform Modernization

SilverTours GmbH, Cologne

Transport und Logistik

50-250 Mitarbeiter

• Led the complete migration of a mission-critical back-office fulfillment system

from on-premise to AWS, establishing a modern, scalable, and highly available cloud

platform.

• Designed and implemented a comprehensive AWS security and network architecture,

ensuring secure connectivity, isolation, and compliance for production

workloads.

• Migrated multi-tens of terabytes of MySQL data to AWS, executing a reliable, low-

risk data transfer for business-critical systems.

• Ported multi-tens of terabytes of NFS data to AWS EFS, enabling scalable, highly

available shared storage in the cloud.

• Automated provisioning and configuration of all servers using Terraform and Ansible,

eliminating manual setup and improving infrastructure consistency.

• Introduced CI/CD pipelines with Auto Scaling Groups, Load Balancers, and blue-

green deployments, enabling zero-downtime releases and improved release safety.

• Implemented centralized log management, significantly improving system observability

and operational troubleshooting.

• Designed and documented backup, maintenance, monitoring, and operations

concepts, strengthening long-term reliability and operational readiness.

• Trained development teams on DevOps practices, AWS, and Terraform, increasing

internal cloud maturity and reducing operational dependencies.

• Achieved four consecutive contract renewals, reflecting sustained delivery quality

and strong stakeholder trust.

Lead Cloud Architect (AWS) - Platform Transformation

Trusted Shops GmbH, Cologne

Internet und Informationstechnologie

500-1000 Mitarbeiter

• Led the migration of legacy monolithic applications to AWS, using Terraform,

Packer, Ansible, Consul, and Vault to establish a secure, automated, and reproducible

infrastructure.

• Migrated CI/CD workflows from Jenkins to CircleCI, significantly improving pipeline

reliability, execution speed, and maintainability.

• Orchestrated the company-wide migration from GitLab to GitHub, standardizing

version control and improving collaboration and code review workflows.

• Migrated all production databases to AWS-managed services, increasing availability,

scalability, and operational stability.

• Automated provisioning, rolling deployments, and in-place upgrades of all servers

using Ansible, enabling zero-downtime updates.

• Established engineering and development standards across teams, improving code

quality, consistency, and long-term maintainability.

• Introduced modern development tooling and workflows, raising overall engineering

productivity and delivery quality.

• Designed and rolled out a company-wide testing strategy, significantly improving

test coverage, release confidence, and defect detection.

• Conducted technical workshops and training sessions on agile testing, clean code

practices, and managing technical debt, strengthening engineering culture and sustainability.

• Achieved three consecutive contract renewals, reflecting sustained delivery quality

and strong stakeholder trust.

Engineering Manager & Agile Transformation Lead

Chefkoch GmbH, Bonn

Internet und Informationstechnologie

50-250 Mitarbeiter

• Introduced and scaled Scrum and Kanban practices across 6 development teams,

enabling predictable delivery, transparency, and continuous improvement.

• Set up, coached, and managed 15 developers in agile ways of working, significantly

improving collaboration, ownership, and delivery velocity.

• Designed and implemented CI/CD pipelines and automated test frameworks,

increasing release frequency while reducing regression risk.

• Led the migration from PHP 5.0 to PHP 7, improving application performance,

security, and long-term maintainability.

• Migrated caching infrastructure from Memcache to Redis, enhancing reliability, performance,

and operational flexibility.

• Executed a full codebase and database character set migration from Latin1 to

UTF-8, ensuring correct internationalization and data consistency.

• Introduced and standardized Atlassian Jira, Confluence, and Bamboo, improving

project tracking, documentation, and CI/CD integration.

• Established Continuous Integration and unit testing practices from the ground up,

raising code quality and reducing production defects.

• Led the architectural transition from a monolith to a microservices-based system,

enabling independent deployments and improved scalability.

• Held overall responsibility for 15 developers, aligning technical execution with business

and delivery goals.

Lead Software Engineer - High-Scale Platforms

werkenntwen GmbH, Cologne

Telekommunikation

50-250 Mitarbeiter

• Supervised and coordinated 10+ developers while scaling platform systems to support

9.3 million registered users.

• Led the scaling and optimization of core systems, ensuring stability and performance

under rapidly growing user demand.

• Drove the development of new features for both end users and internal employees,

aligning technical delivery with business needs.

• Designed and implemented an in-house advertising server handling 5+ billion ad

impressions per month, delivering high throughput and reliability at massive scale.

• Produced regular technical and performance reports for executive management,

supporting data-driven decision-making.

• Continued the development and optimization of the in-house

PHP framework, improving maintainability, performance, and developer

productivity.

Software Engineer - High-Scale Platforms

werkenntwen GmbH, Cologne

Telekommunikation

50-250 Mitarbeiter

• Contributed to the build and operation of one of Germany’s largest social

networking platforms, supporting a highly scalable, high-traffic production environment.

• Operated and scaled the platform to reliably handle up to 250,000 concurrent users.

• Enabled the processing of 5+ billion page views per month, ensuring performance

and stability at massive scale.

• Drove the development and enhancement of core user-facing features, improving

engagement and user experience.

• Optimized the platform scaling architecture and overall system stability, reducing

performance bottlenecks under peak load.

• Expanded and improved monitoring and observability systems, enabling proactive

detection and faster resolution of incidents.

• Introduced Scrum and Kanban methodologies, professionalizing software development

processes and improving delivery predictability and team efficiency.

Software Engineer - Agency

Michel Development & Consulting GmbH & Co. KG, Bad Breisig

Internet und Informationstechnologie

10-50 Mitarbeiter

• Contributed to a wide range of client projects in a fast-paced agency environment,

delivering tailored web solutions for diverse industries.

• Designed, implemented, and maintained small to mid-sized websites for multiple

customers with varying requirements.

• Developed and customized multilingual websites, supporting international audiences

and localization needs.

• Built and adapted small e-commerce and shop systems for global target markets.

• Worked in direct collaboration with clients, translating business requirements into

technical solutions.

• Delivered results across rapidly changing projects with short implementation

cycles, demonstrating flexibility and reliability.

• Established a strong foundation in clean web development, best practices, and

customer-centric delivery.

Senior Cloud & Platform Engineer

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Senior AWS Cloud Engineer - Banking & Security

Lead Cloud Architect (AWS) - HR & Security

Lead Cloud Architect (AWS) - Healthcare & Security

Lead Cloud Architect (AWS) - High Availability & Compliance

Lead Cloud Architect (AWS) - Migration & Platform Modernization

Lead Cloud Architect (AWS) - Migration & Platform Modernization

Lead Cloud Architect (AWS) - Platform Transformation

Engineering Manager & Agile Transformation Lead

Lead Software Engineer - High-Scale Platforms

Software Engineer - High-Scale Platforms

Software Engineer - Agency

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