Senior Backend Engineer - Java Spring, Kubernetes (Hybrid)

Infolet

Kraków

Hybrid

PLN 180,000 - 260,000

Full time

12 hours ago
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Benefits offered by this job

Relocation package (4500 PLN total)
Extended medical care
Multisport card
Life insurance

Job summary

Infolet Kraków is looking for a Senior 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, and contribute to architectural decisions.

In a hybrid setup (2 days in the office, 3 days remote), you will work on Kubernetes, Azure, Kafka, PostgreSQL, and cloud environments, focusing on performance, reliability, and maintainability

Qualifications

  • Strong commercial experience with Java 21+ and Spring Boot.
  • Deep understanding of OOP, clean code, and software engineering principles.
  • Experience designing microservices and distributed systems.
  • Proficiency with Kubernetes and cloud platforms (Azure).
  • Hands-on with Kafka and/or Azure Event Hubs for event-driven apps.
  • Strong PostgreSQL knowledge and database design/optimisation.
  • Performance tuning and backend service optimisation.
  • Git and GitHub proficiency with Linux scripting.
  • Networking fundamentals and practical problem solving.
  • Use of AI tools like GitHub Copilot or Google Gemini in development.
  • Excellent troubleshooting and analytical skills; English in international context.

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 in Kubernetes and cloud environments.
  • Develop event-driven solutions using Kafka and Azure Event Hubs.
  • Design, manage, and optimise PostgreSQL databases.
  • Improve performance, scalability, reliability, and resource utilisation.
  • Troubleshoot backend, networking, performance, and orchestration issues.
  • Work with Azure, Kubernetes, Linux, Git, and GitHub.
  • Use GitHub Copilot and Google Gemini in daily development workflow.
  • Maintain high standards of clean code, testing, and software engineering practices.
  • Participate in code reviews and architectural improvements.
  • Collaborate with engineers in an Agile environment.

Skills

Java
Spring Boot
OOP & Clean Code
Microservices
Kubernetes
Azure
Kafka
PostgreSQL
Git / GitHub
Linux scripting
Networking basics
AI tools (Copilot, Gemini)
English communication

Tools

Git
GitHub

Job description

Infolet Kraków is looking for a Senior 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, and contribute to architectural decisions.

In a hybrid setup (2 days in the office, 3 days remote), you will work on Kubernetes, Azure, Kafka, PostgreSQL, and cloud environments, focusing on performance, reliability, and maintainability

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