Senior Java Backend Engineer: Microservices

ALTEN; Kraków; On-site; PLN 180,000 - 250,000; Full time

Benefits offered by this job

Medicover medical care

Relocation opportunities

Career path development

Referral program

Group life insurance

Newborn leave

Job summary

ALTEN Polska is seeking an experienced backend engineer to design, develop, and maintain microservices-based backend applications using Java 21+ and Spring in a cloud/Kubernetes environment. You will contribute to a next-generation network management platform, work with Kafka, Azure Event Hubs, PostgreSQL, and CI/CD practices in an Agile team, while communicating in English across international projects.

This full-time role offers a stable contract, opportunities to relocate within ALTEN Polska,

Qualifications

• 5+ years of backend software development experience.
• Strong proficiency in Java 21+ and Spring Framework.
• Hands-on experience designing and building microservices in distributed systems.
• Familiar with Kubernetes and containerized environments.
• Experience with cloud platforms, preferably Microsoft Azure.

Responsibilities

• Design, develop, and maintain robust backend applications based on a microservices architecture.
• Build scalable, high-performance services using Java 21+ and the Spring Framework.
• Contribute to architectural decisions and the evolution of a next-generation network management platform.
• Develop and integrate event-driven solutions using Kafka and Azure Event Hubs.
• Deploy and support applications running in cloud and Kubernetes environments.
• Optimize application performance, reliability, and availability.
• Design, manage, and improve PostgreSQL database solutions.
• Collaborate with cross-functional teams in Agile environment and participate in code reviews.
• Create and maintain technical and architectural documentation.
• Leverage AI-assisted development tools to improve software quality and productivity.

Skills

Java

Spring Framework

Microservices

OOP/clean code

Kubernetes

Microsoft Azure

Kafka

PostgreSQL

Git/GitHub

Linux scripting

Networking basics

Performance tuning

English communication

AI-assisted development tools

Tools

Java 21+

Spring Framework

Kubernetes

Azure

Kafka

PostgreSQL

Git

GitHub

Linux

Job description

ALTEN Polska is seeking an experienced backend engineer to design, develop, and maintain microservices-based backend applications using Java 21+ and Spring in a cloud/Kubernetes environment. You will contribute to a next-generation network management platform, work with Kafka, Azure Event Hubs, PostgreSQL, and CI/CD practices in an Agile team, while communicating in English across international projects.

This full-time role offers a stable contract, opportunities to relocate within ALTEN Polska,