07/24/2025 updated
100 % available
Backend Engineer | Java Specialist | Cloud-Native Microservices
Aarhus, Denmark
Worldwide
M.Sc. in Computer Science (Information Security)Java (Programming Language)Apache ActiveMQAmazon Web ServicesAmazon Elastic Compute CloudAmazon S3Cloud ComputingSoftware QualityDatabasesContinuous IntegrationData ManagementDevOpsIncident ResponseSystem MonitorJUnitPostgreSQL
Java Development
Java (17+) and Spring Boot expertise for building scalable, high-performance backend systems with 5+ years of experience in enterprise applications.
Cloud & DevOps
AWS (EC2, Lambda, S3), Docker, Kubernetes, and CI/CD pipeline implementation with Git and Maven for cloud-native microservices architecture.
Database & Messaging Systems
PostgreSQL, MongoDB, Redis, Kafka, and message queue systems (RabbitMQ, ActiveMQ) for robust data management and communication between services.
Security Implementation
OAuth2, RBAC, and custom ACL frameworks for building secure authentication and authorization systems.
Monitoring & Observability
Prometheus, ELK, and Sentry implementation for comprehensive system monitoring and incident response.
Testing Methodologies
JUnit, Selenium, TDD, and Integration Testing practices for ensuring code quality and reliability.
API Development
REST and gRPC protocols for building efficient and scalable service interfaces.
Java (17+) and Spring Boot expertise for building scalable, high-performance backend systems with 5+ years of experience in enterprise applications.
Cloud & DevOps
AWS (EC2, Lambda, S3), Docker, Kubernetes, and CI/CD pipeline implementation with Git and Maven for cloud-native microservices architecture.
Database & Messaging Systems
PostgreSQL, MongoDB, Redis, Kafka, and message queue systems (RabbitMQ, ActiveMQ) for robust data management and communication between services.
Security Implementation
OAuth2, RBAC, and custom ACL frameworks for building secure authentication and authorization systems.
Monitoring & Observability
Prometheus, ELK, and Sentry implementation for comprehensive system monitoring and incident response.
Testing Methodologies
JUnit, Selenium, TDD, and Integration Testing practices for ensuring code quality and reliability.
API Development
REST and gRPC protocols for building efficient and scalable service interfaces.
Experience
Professional experience5 - 10 years
Freelancer since2019
Languages
EnglishFluent
Project history
Designed high-load microservices processing millions of requests daily, migrated backend modules to Java 17+, built custom authorization layer, deployed observability stack, and mentored junior developers while working in Agile teams.
Developed secure microservices for authentication and payment using OAuth2 and Stripe for B2C applications, led CI/CD pipeline integration, and managed containerized AWS deployments for scaling during peak traffic.
Built enterprise-grade systems using Java, Oracle ADF, Crystal Reports, and BPM tools while maintaining backend infrastructure and automating reporting for business units.