Senior Java Software Engineer

RE Partners; Warszawa; On-site; PLN 180,000 - 340,000; Full time

Job summary

RE Partners is seeking a Senior Java Engineer to join our team and help build, modernize, and enhance a Master Data Platform that serves as the source for demographic data and robust data management across customers and related entities.

You will design and develop scalable, high-performance backend services in Java, working with GraphDB, Scala, and data processing at scale. The role focuses on security, regulatory compliance, and data integrity in enterprise environments.

Qualifications

• Experience with Java and JVM internals (Concurrency, JMM)
• Exposure to big data technologies and distributed processing
• Knowledge of Data Mesh, Data Lakes and warehousing solutions
• Strong experience with Kubernetes; building Kubernetes operators is a plus
• Experience with message brokers such as Kafka and RabbitMQ

Responsibilities

• Design and develop high-performance applications using Java.
• Work with GraphDB and Scala-based components to manage complex data relationships and processing.
• Support big data systems operating at scale with real-time data processing.
• Build and optimize systems for transaction monitoring, sanctions screening, and fraud detection.
• Ensure platform reliability, scalability, and performance for business-critical workloads.

Skills

Java proficiency

Big data concepts

Distributed processing

Data governance knowledge

Security/regulatory awareness

Tools

Kubernetes

Kafka

RabbitMQ

GraphDB

Docker

OpenShift

Scala

Job description

We are seeking a highly skilled Senior Java Engineer to join our team and play a key role in building, modernizing, and enhancing a critical enterprise Master Data Platform . This platform serves as the source for maintaining key demographic data and delivering robust data management capabilities across customers, bankers, and related entities.

As part of this team, you will contribute to the design and development of scalable, high-performance backend services that ensure data accuracy, integrity, and consistency across the organization. You will work on complex integration challenges, enabling seamless data exchange between systems while adhering to strict security, privacy, and regulatory standards.

Your work will directly support operational efficiency, regulatory reporting, risk management, and customer experience initiatives.

Key Responsibilities:

• Design and develop high-performance applications using Java.
• Work with GraphDB and Scala-based components to manage complex data relationships and processing.
• Support big data systems operating at scale with continuous, real-time data processing.
• Build and optimize systems for transaction monitoring, sanctions screening, and fraud detection.
• Ensure platform reliability, scalability, and performance for business-critical workloads.

Requirements:

• Exposure to big data technologies and distributed processing.
• High level of Java (Concurrency, JVM, JMM); Experience building streaming data architectures;
• Good working knowledge of Data Meshe, Data Lakes and warehousing solutions;
• Strong experience with Kubernetes, building Kubernetes operators is of special interest;
• Experience with message brokers (Kafka/ RabbitMQ);

Nice to have:

• Practical experience with messaging system (Kafka, Solace, *MQ).
• Experience with Graph databases (GraphDB) and Scala.
• Docker experience. OpenShift\Public cloud experience.
• Experience with Java profiling\troubleshooting. Experience with Mongo. Knowledge of FX Risk calculations
• Understanding of data governance, master data management, and real-time processing systems.
• Ability to work on highly critical, large-scale enterprise platforms.

Join Our Global Team:

We invite you to apply for the position at RE Partners. Join us in shaping the future of business technology consulting and transforming the way organizations thrive in a digital world. As a diverse, woman-owned global business, we pride ourselves on keeping talent happy – our 7% attrition rate speaks volumes. Bring your talented friends along and earn a referral bonus

Equal Opportunity Employer:

We are an equal opportunity employer and welcome applications from all qualified individuals regardless of race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, disability, or veteran status.