Senior Java Microservices Engineer — Spring Boot & Kafka

Us3 Consulting; Warszawa; On-site; PLN 170,000 - 230,000; Full time

Job summary

Us3 Consulting seeks a senior backend developer who blends coding with systems architecture understanding. You will implement microservices, event-driven patterns, and secure backend services using Java, Spring Boot, and Spring Security.

The role involves building scalable systems for a major UK retailer, plus CI/CD pipelines and rigorous testing. You will work with PostgreSQL, MongoDB, Kafka, and cloud technologies (AWS/AI) while leveraging tools like GitHub Actions, Jenkins, Mockito, Gatling,

Qualifications

• Strong proficiency in Java and Spring Boot frameworks.
• Hands-on experience with microservices architecture and Kafka.
• Solid understanding of CI/CD processes and tools like Jenkins and GitHub Actions.
• Experience with PostgreSQL and MongoDB databases.
• Exposure to AWS cloud services or AI technologies.
• Familiarity with performance testing tools such as Gatling and JMeter.
• Knowledge of system monitoring tools like New Relic and Grafana.
• Experience in shell scripting for automation.
• Understanding of secure coding practices and Spring Security.

Responsibilities

• Develop and maintain backend services using Java, Spring Boot, and Spring Security. Design and implement microservices and event-driven architectures leveraging Confluent Kafka.
• Build and manage CICD pipelines using GitHub Actions, Jenkins, and shell scripting.
• Write and execute unit, integration, and performance tests using Mockito, Gatling, and JMeter.
• Monitor, troubleshoot, and optimize systems using New Relic and Grafana.

Skills

Java

Spring Boot

Microservices

Kafka

CI/CD

Unit testing

Integration testing

Performance testing

Monitoring

Shell scripting

Security

PostgreSQL

MongoDB

AWS

AI technologies

Tools

Confluent Kafka

GitHub Actions

Jenkins

Shell scripting

Mockito

Gatling

JMeter

New Relic

Grafana

Spring Security

Job description

Us3 Consulting seeks a senior backend developer who blends coding with systems architecture understanding. You will implement microservices, event-driven patterns, and secure backend services using Java, Spring Boot, and Spring Security.

The role involves building scalable systems for a major UK retailer, plus CI/CD pipelines and rigorous testing. You will work with PostgreSQL, MongoDB, Kafka, and cloud technologies (AWS/AI) while leveraging tools like GitHub Actions, Jenkins, Mockito, Gatling,