java developer in cloud-native solutions
Posted 6
views
Summary
Java developer at IT services and consulting firm Callisto Web Solutions B.V., designing and building cloud-native microservices for clients across the full SDLC. Core stack: Java 17/21, Spring Boot 3, Kafka/Azure Event Hubs, Docker/Kubernetes (AKS), Azure cloud with Terraform/Bicep IaC, CI/CD, and monitoring via Prometheus/Grafana.
Описание
Callisto Web Solutions B.V. provides IT services and consulting, delivering cloud-native solutions for clients.
Задачи
- Design, plan, and implement microservices-based architectures across the full software development lifecycle
- Develop scalable and maintainable applications using Java 17/21 and Spring Boot 3
- Design and implement event-driven architectures using Kafka and Azure Event Hubs
- Develop secure applications using OAuth2, JWT, and Spring Security
- Work with SQL and NoSQL databases, including Azure Cosmos DB
- Analyse and optimise application performance through JVM configuration, profiling, garbage collection, and performance tuning, including JMeter
- Develop and maintain comprehensive unit and integration testing using Mockito, Testcontainers, Rest Assured, and Cloud Contract
- Build and manage containerised applications using Docker and Kubernetes, preferably Azure Kubernetes Service (AKS)
- Implement and maintain CI/CD pipelines and cloud-native deployment practices
- Design and manage Azure infrastructure using Infrastructure as Code with Bicep/Terraform
- Implement and maintain Azure security practices, including Identity Management, RBAC, and compliance
- Develop monitoring and observability solutions using Azure Monitor, Prometheus, and Grafana
- Identify opportunities to improve resource utilisation, performance, scalability, and cost efficiency
- Stay up to date with emerging technologies and contribute to continuous technical improvement.
Требования
- Extensive professional experience with Java 17 and/or Java 21
- Strong experience with Spring Boot 3 and the Spring ecosystem, including Spring Core, Spring Security, Spring JPA, Transactions, and AOP
- Strong understanding of microservices and distributed systems
- Experience with SQL and NoSQL databases, preferably Cosmos DB
- Hands-on experience with JVM performance tuning and memory management
- Experience with OAuth2 and JWT
- Practical experience with Kafka and/or Azure Event Hubs
- Strong experience with Docker and Kubernetes, preferably AKS
- Solid knowledge of Microsoft Azure, including Key Vault, Storage, VMs, Networking, and related services
- Experience with Terraform and/or Bicep
- Knowledge of cloud security, identity management, RBAC, and compliance
- Experience with Azure monitoring, Prometheus, and Grafana
- Strong understanding of CI/CD and DevOps practices
- Excellent problem-solving, communication, and collaboration skills
- Ability to work effectively with clients and multicultural, multidisciplinary teams.
Условия
No conditions specified