IT Systems Administrator (Big Data & Databases)

Quick Facts

• Role: IT Systems Administrator (Big Data & Databases)

• Focus area: On-premise Hadoop/Big Data platform and enterprise database administration in healthcare IT

• Contract/project duration: Through 31.12.2026

• Work model: Full-time; remote/hybrid

• Salary (gross): 8,000–22,000 PLN (plus regulated bonus and length-of-service add-on)

Description

You will maintain and implement IT systems for healthcare, with emphasis on ensuring continuity of Hadoop (HDP) and enterprise database environments in on-premise infrastructure. The work includes administration of the Hadoop ecosystem (HDFS, Spark, YARN, Hive, etc.), performance monitoring and tuning, and support for ETL/data pipelines using Kafka-based CDC. You will also manage access and security (Ranger, Kerberos, AD) and automate admin tasks with Ansible.

Responsibilities

• Administer and maintain on-premise Hadoop (HDP) cluster environments and ensure service continuity

• Administer and maintain enterprise databases: EnterpriseDB, PostgreSQL, Percona

• Manage key Hadoop components: HDFS, Spark, YARN, Hive, MapReduce, Tez, Livy, ZooKeeper

• Support data processing/analytics tools: Airflow, JupyterLab, Zeppelin, Vault, Redis

• Optimize ETL/large-volume data processing

• Monitor cluster, database, and resource performance; tune systems in collaboration with developers

• Maintain and monitor data processing/ingestion flows, including CDC pipelines with Kafka Connect, Debezium, Schema Registry, Apache Avro

• Manage users, roles, permissions, and access policies using Apache Ranger, Active Directory, and Kerberos

• Automate administrative/configuration/deployment tasks with Ansible

• Diagnose and resolve incidents/performance issues by analyzing logs

• Participate in on-call/on-duty rotation to ensure continuity of critical systems

Requirements

• Minimum 3 years of experience as a Big Data/Hadoop Administrator, Database Administrator, or similar

• Hands-on administration of on-premise Hadoop environments (HDP/CDP)

• Hadoop ecosystem administration experience: HDFS, Spark, YARN, Hive, MapReduce, Tez, Livy, ZooKeeper

• Administration experience for PostgreSQL and EnterpriseDB (including clustered environments)

• Knowledge of data integration/processing with: Apache Kafka, Kafka Connect, Debezium, Schema Registry, Apache Avro

• Practical experience with Airflow, JupyterLab, Zeppelin, Vault, Redis

• Experience monitoring, optimizing performance, and resolving production issues

• Security/access management knowledge: Apache Ranger, Kerberos, Active Directory

• Automation experience with Ansible

• Ability to analyze logs and troubleshoot complex IT environments

• Administrative-level Linux knowledge

• Valid KRK no-criminal-record certificate

• Education and experience matching the posting: higher education and 5 years of professional experience

Benefits

• Employment contract

• Remote or hybrid work model

• Training and course co-funding

• Child recreation support funding

• Performance bonuses

• Flexible working hours

• Meal benefit program (Kafeteria my benefit)

• Paid time for preventive medical tests

• Social benefits (including low-interest loans)

• Co-funding for corrective eyewear