03/30/2026 updated
100 % available
Senior Backend Engineer (Java/Kubernetes), Available for B2B Contracts from April 2026
Prague, Czech Republic
Only remote
InformatikAbout me
Senior Platform and Backend Engineer with 15+ years of experience architecting and optimizing production-grade distributed systems for enterprise clients. I specialize in cloud-native platforms, performance engineering, and CI/CD automation for high-scale microservices.
Java (Programming Language)Test SuiteApplication Programming Interfaces (APIs)Atlassian ConfluenceAtlassian JiraAutomationAutomotive IndustryCloud ComputingCode GenerationApache CXFComplianceContinuous IntegrationEngineeringJava Platform Enterprise Edition (J2EE)GitHub
For more details, please check my profile on LinkedIn: linkedin.com/in/radovan-duga-2185b010
What I Deliver:
• Performance at Scale – Proven track record of achieving 80%+ performance improvements through intelligent caching, query optimization, and architectural refactoring
• System Reliability – Eliminated 95% of production alerts by implementing resilient retry mechanisms and improving test suite stability from 85% to 98%
• Platform Modernization – Led critical API migrations ensuring zero customer impact, designed automated code generation pipelines, and architected unified service layers improving responsiveness by 70%
• Security & Compliance – Proactive vulnerability management, enterprise security scanning (Aquasec, Veracode, SonarQube), and adherence to industry standards
• Technical Leadership – Accelerated delivery velocity by 30-40% through strategic adoption of AI-powered development tools while maintaining 95%+ test coverage standards
Core Expertise:
Platform Engineering • Kubernetes • Spring Boot 3.x • PostgreSQL • Redis • Microservices Architecture • API Design • Performance Optimization • CI/CD Automation • Cloud-Native Development
Recent Engagements:
Currently completing a mission-critical microservice platform engagement with NCR Voyix (ODSP ecosystem) and maintaining a long-term part-time contract with T-Mobile Czech Republic on automotive supply chain EDI platforms. Previously delivered a 5-year cloud-native workflow orchestration platform for PwC using Kubernetes and Argo Workflows.
Prior experience includes contracts with BMW, CA Technologies, DHL IT Services, Commerzbank, and other enterprise clients (2012-2018).
Core Technologies
Proficiency: Expert
- Java 17, Spring Boot 3.x, Spring Cloud, Kubernetes, Docker, PostgreSQL, Redis, GitLab CI/CD, REST/OpenAPI 3.0, OAuth2/OIDC, JUnit 5, Mockito
Proficiency:Proficient
- AKS, OpenShift, Argo Workflows, Kafka, Istio, Hibernate ORM, Spring Data JPA, Caffeine Cache, Ansible, Flyway, Grafana, Apache Spark, GitHub Actions, Jenkins
Proficiency: Familiar
- Apache CXF, MS SQL Server, SonarQube, Aquasec, Veracode, SSE, Cucumber BDD, CloudBuild
Experience
Professional experience10+ years
Freelancer since2012
Languages
EnglishFluentSlovakNative speakerCzechNative speaker