Backend Engineer: Java Microservices in Cloud & Kubernetes

Solid

Kraków

Hybrid

PLN 180,000 - 300,000

Full time

8 days ago
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Job summary

Solid is seeking a Backend Engineer to join the NGSM team, building a modern network management platform for mission-critical radio systems. You will design and develop scalable backend services and microservices using Java 21+ and Spring.

You will contribute to architecture decisions, build microservices in Kubernetes and cloud environments, and work with Kafka/Azure Event Hubs and PostgreSQL to ensure performance and reliability of distributed systems.

Qualifications

  • Strong commercial experience with Java, preferably Java 21+.
  • Very good knowledge of Spring / Spring Boot.
  • Strong understanding of OOP, clean code, and software engineering principles.
  • Experience designing and developing microservices and distributed systems.
  • Experience with Kubernetes.
  • Experience with cloud platforms, preferably Microsoft Azure.
  • Hands-on experience with messaging technologies such as Kafka and/or Azure Event Hubs.
  • Strong knowledge of PostgreSQL, including database design and optimisation.
  • Experience with performance tuning and optimisation of backend services.
  • Good knowledge of Git and GitHub.
  • Practical knowledge of Linux and scripting/automation.
  • Understanding of networking fundamentals, including protocols, routing, and network services.
  • Experience using generative AI tools such as GitHub Copilot or Google Gemini in software development.
  • Very good troubleshooting and analytical skills.
  • English allowing effective communication in an international engineering environment.

Responsibilities

  • Design, develop, and maintain backend services and microservices using Java 21+ and Spring.
  • Contribute to architecture and technical design decisions for distributed systems.
  • Build and orchestrate microservices running in Kubernetes and cloud environments.
  • Develop event-driven solutions using Kafka and Azure Event Hubs.
  • Design, manage, and optimise PostgreSQL databases.
  • Improve application performance, scalability, reliability, and resource utilisation.
  • Troubleshoot complex backend, networking, performance, and orchestration issues.
  • Work with Azure, Kubernetes, Linux, Git, and GitHub.
  • Use GitHub Copilot and Google Gemini as part of the daily software development workflow.
  • Maintain high standards of clean code, testing, and software engineering practices.
  • Participate in technical discussions, code reviews, and architectural improvements.
  • Collaborate with other engineers in an Agile environment.

Skills

Java
Spring Boot
OOP & clean code
Microservices
Kubernetes
Azure
Kafka
PostgreSQL
Performance tuning
GitHub
Linux
Networking basics
AI tools in development
Troubleshooting
English communication

Tools

Java 21+
Spring / Spring Boot

Job description

Solid is seeking a Backend Engineer to join the NGSM team, building a modern network management platform for mission-critical radio systems. You will design and develop scalable backend services and microservices using Java 21+ and Spring.

You will contribute to architecture decisions, build microservices in Kubernetes and cloud environments, and work with Kafka/Azure Event Hubs and PostgreSQL to ensure performance and reliability of distributed systems.

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