• Designed and led the end-to-end architecture for a scalable, containerized microservicesplatform deployed on Scalewaycloud.
• Implemented Infrastructure asCode (IaC) using Terraform,Ansible, and Packer to automateenvironment provisioning acrossdevelopment, staging, andproduction.
• Built a CI/CD pipeline in CircleCIautomating build, linting, testing,security scanning (Snyk),containerization, and deployment,reducing manual deployment eff ortby 80%.
• Configured Traefik as a reverseproxy and load balancer withautomatic SSL certificatemanagement via ACME DNSchallenge using Cloudfl are.
• Integrated Sentry to automateapplication monitoring and errorreporting, enabling fasteridentifi cation and resolution ofproduction issues.

Engaged as a freelance Senior Back End Developer at The Marcom Engine, where I spearheaded the design, development, and maintenance of scalable backend services utilizing Node.js, Python, and microservicesarchitecture. Successfully delivered a greenfi eld backend platform from the ground up while promoting softwarequality enhancements, testing best practices, and implementing stringent coding standards across numerousprojects. Collaborated eff ectively with DevOps teams and stakeholders to improve CI/CD pipelines, documentation,and code review processes.

• Architected and implemented a greenfield backend application using Node.js and Python, resulting in a scalableand maintainable solution that aligns with business objectives.
• Ensured optimal performance, availability, and security by designing robust REST APIs, integrating best securitypractices, and enforcing API standards.
• Championed and executed a testing strategy that elevated code coverage across all projects to over 80% withinthree months, meeting quality benchmarks.
• Led initiatives to eliminate sensitive data from Git repositories, cleaning commit history and preventing credentialleaks through BFG Repo-Cleaner and git fi lter-repo.
• Established and enforced code review guidelines and best practices to standardize code quality, enhancemaintainability, and encourage knowledge sharing.
• Partnered with DevOps teams to optimize CI/CD pipelines using Jenkins, SonarQube, and Nexus, ensuringcontinuous quality monitoring and seamless deployments.
• Integrated third-party services and APIs, working closely with partners to achieve seamless backend systemintegration.
• Developed and maintained comprehensive technical documentation to facilitate ongoing maintenance,troubleshooting, and developer onboarding.
• Mentored junior developers through rigorous code reviews, pair programming sessions, and technical guidance,promoting skill advancement and engineering excellence.
• Proactively contributed to internal knowledge bases, including Confl uence documentation for developerprocesses, code standards, and testing methodologies.

• Designed and provisioneddevelopment, testing, andproduction environments onDeutsche Telekom Cloud (Azure-based) to support the high-visibility#WhatWeValue campaign.
• Implemented secure deployment ofthe application in a managedKubernetes cluster, includingconfi guring nginx-ingress-controllerand PKI validation for TLS/SSLcertifi cates.
• Developed CI/CD pipelines in AzureDevOps to automate build, test,and publish processes, ensuringstreamlined and reliabledeployment workfl ows.
• Integrated security best practicesthroughout the infrastructure setupand deployment process, aligningwith enterprise security compliancerequirements.
• Collaborated closely with projectstakeholders to deliverinfrastructure ready for productionwithin tight campaign timelines.

I worked as a freelance Java Architect on the DPDHL Freight Solutions (FS) project through Publicis Sapient. My roleinvolved contributing to the client's digital transformation by modernizing backend systems, enhancing softwaredelivery pipelines, and strengthening observability. I collaborated with cross-functional teams to architect, implement,and optimize cloud-native microservices that run on Azure Kubernetes Service (AKS) while integrating best practicesfor security, monitoring, and data management.

• Microservices Architecture:
  • Designed and implemented a microservices architecture on Azure Kubernetes Service(AKS), utilizing Spring Boot and cloud-native patterns to ensure scalability and resilience.
• Optimization:
  • Refi ned and optimized existing Spring Boot microservices by applying domain-driven design (DDD),hexagonal architecture, asynchronous processing, application events, and aspect-oriented programming.
• Distributed Tracing:
  • Integrated distributed tracing with Spring Cloud Sleuth to enable the propagation ofCorrelation IDs across services, enhancing traceability.
• API Security:
  • Enhanced API security by implementing JWT-based authentication, transitioning from static JWTconfi guration to Auth0 integration, and exploring migration to Azure Active Directory (AAD).
• Shared Libraries:
  • Developed and deployed a shared Maven library for Auth0 audience validation, improvingauthentication consistency across services.
• CI/CD Improvements:
  • Advanced CI/CD pipelines in Azure DevOps to streamline the build, test, and deploymentworkfl ows for microservices and shared libraries.
• Automated Documentation:
  • Automated API documentation using Swagger 2 via SpringFox, ensuring up-to-dateand consistent API specifi cations.
• Logging Enhancements:
  • Implemented Splunk logging for backend services, enhanced log appenderconfi gurations, and collaborated with infrastructure teams to align log analytics for production monitoring.
• Health Monitoring:
  • Created a watchdog process to collect API health metrics and automatically trigger Splunkalerts for proactive issue detection.
• Data Management:
  • Architected and implemented automated Cosmos DB backup pipelines using Azure DataFactory, ensuring data retention compliance and disaster recovery readiness.
• Documentation Practices:
  • Documented software architecture and API designs using standardized documentationpractices to facilitate knowledge sharing and onboarding.

I worked as a Senior DevOps Engineer on the DPDHL Logistics Platform project, which operated in a hybrid cloudenvironment that included both a private data centre in Prague and Microsoft Azure. My focus was on streamlininginfrastructure and development processes through automation, containerization, and Infrastructure as Code (IaC). Icollaborated closely with both development and infrastructure teams to enhance CI/CD pipelines, deploycontainerized applications, and implement scalable and maintainable infrastructure solutions.

• I designed and implemented CI/CD pipelines using Jenkins within OpenShift clusters, signifi cantly improvingdeployment speed and consistency across the hybrid cloud infrastructure.
• I developed Infrastructure as Code solutions with Ansible and Terraform to provision and manage infrastructure inboth Azure and private data centre environments.
• I developed Infrastructure as Code solutions with Ansible and Terraform to provision and manage infrastructure inboth Azure and private data centre environments.
• I customized Ansible automation to function in restricted environments without privilege escalation, ensuringcompliance with security and operational requirements.
• I engineered a custom Ansible Runner to support OpenShift's capability for arbitrarily assigned user IDs at runtime,allowing seamless execution of automation tasks inside containers.
• I built custom Jenkins container images and deployed them within OpenShift to enhance pipeline fl exibility andstandardize tooling.
• I shared my expertise through internal knowledge-sharing sessions, pair programming, and slide-based tech talks,aiming to uplift the team's DevOps maturity and skills.
• I advocated for a DevOps culture that emphasizes collaboration, continuous improvement, and automation tobridge the gaps between development and operations.