Senior Java Backend Engineer - Payments Platform

Experis ManpowerGroup Sp. z o.o.; Województwo pomorskie; On-site; PLN 180,000 - 260,000; Full time

Job summary

Experis ManpowerGroup Sp. z o.o. seeks a Senior Java Developer to join a large-scale payment technology project. You will design backend solutions for a Terminal Management System supporting 300,000+ terminals and contribute to modernization efforts.

The role requires Java 8+, Spring, Hibernate, REST APIs, and strong experience with distributed architectures. You will review requirements, create technical documentation, perform security scans, and help evolve a complex enterprise solution.

Qualifications

• Strong experience with Java 8+.
• Hands-on experience with Spring / Spring Boot.
• Experience with Hibernate / JPA, JEE, RabbitMQ.
• Experience with Oracle Database.
• Experience with REST APIs and system integrations.
• Knowledge of distributed systems.
• Experience with JBoss or WildFly.
• Familiarity with Git, GitLab, Maven, Jenkins, Nexus, Jira.
• Knowledge of security tools Fortify, Sonatype.
• English level B2+.

Responsibilities

• Design and develop backend solutions.
• Review requirements and propose technical improvements.
• Create technical documentation.
• Upgrade and modernize existing systems.
• Refactor legacy code.
• Perform security scans and remediate vulnerabilities.

Skills

Java 8+

REST APIs

Distributed systems

JEE

JBoss/WildFly

Tools

Spring / Spring Boot

Hibernate / JPA

Oracle Database

RabbitMQ

Git

GitLab

Maven

Jenkins

Nexus

Jira

Fortify

Sonatype

Job description

Experis ManpowerGroup Sp. z o.o. seeks a Senior Java Developer to join a large-scale payment technology project. You will design backend solutions for a Terminal Management System supporting 300,000+ terminals and contribute to modernization efforts.

The role requires Java 8+, Spring, Hibernate, REST APIs, and strong experience with distributed architectures. You will review requirements, create technical documentation, perform security scans, and help evolve a complex enterprise solution.