java developer in cloud-native solutions

HireHi; Amsterdam; On-site; EUR 70,000 - 110,000; Full time

Job summary

Callisto Web Solutions B.V. ищет опытного Java-разработчика для проектирования и внедрения микросервисной архитектуры на базе Java 17/21 и Spring Boot 3. В задачи входит создание событийно-ориентированных систем с Kafka/Azure Event Hubs, обеспечение безопасности OAuth2/JWT и работу с Azure инфраструктурой.

Приоритет — работа с Docker/Kubernetes (AKS), мониторинг и оптимизация производительности JVM, совместная работа в международной команде и участие в CI/CD процессах.

Qualifications

• Опыт разработки на Java 17 и/или Java 21.
• Опыт с Spring Boot 3 и Spring экосистемой (Core, Security, JPA).
• Понимание микросервисной архитектуры и распределённых систем.
• Опыт работы с SQL/NoSQL базами данных (предпочтительно Cosmos DB).
• Навыки настройки JVM-производительности и калибровки памяти.
• Опыт с Kafka и/или Azure Event Hubs.
• Опыт Docker, Kubernetes (AKS предпочтительно).
• Знание Microsoft Azure и инструментов мониторинга.

Responsibilities

• Разработка, планирование и внедрение архитектур на базе микросервисов на всем цикле разработки.
• Разработка масштабируемых приложений на Java 17/21 и Spring Boot 3.
• Проектирование событийно-ориентированных архитектур с Kafka/Azure Event Hubs.
• Разработка безопасных приложений с OAuth2/JWT и Spring Security.
• Работа с базами данных SQL и NoSQL (Azure Cosmos DB).
• Оптимизация производительности JVM, профилирование и настройка GC, тестирование (JMeter).
• Покрытие тестами unit/integration (Mockito, Testcontainers, Rest Assured).
• Работа с Docker и Kubernetes, AKS.
• Настройка и поддержка CI/CD и cloud-native деплоймента.
• Проектирование инфраструктуры в Azure с IaC (Bicep/Terraform).
• Обеспечение безопасности Azure: Identity, RBAC, compliance.
• Мониторинг и observability: Azure Monitor, Prometheus, Grafana.

Skills

Java 17/21

Spring Boot 3

Microservices

OAuth2/JWT

Docker

Kubernetes

AKS

Terraform/Bicep

Azure Monitor/Prometheus/Grafana

CI/CD

Tools

AKS

Terraform

Bicep

Docker

Kubernetes

Azure

Job description

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