Key Responsibilities

• Provide L3 technical support for enterprise Big Data platforms and production environments.
• Administer and maintain Hadoop clusters, including HDFS, YARN, HBase and related components.
• Perform cluster lifecycle activities such as provisioning, scaling, patching and decommissioning.
• Manage and optimise Apache Kafka for high-throughput, real-time data streaming.
• Administer OpenSearch/Elasticsearch clusters and optimise indexing and query performance.
• Support AWS EMR environments for scalable data processing and reconciliation workloads.
• Monitor and tune MapReduce, YARN and Spark workloads for performance and reliability.
• Manage Kerberos authentication, access controls and security across the Hadoop ecosystem.
• Perform capacity planning, performance tuning, failover and disaster recovery activities.
• Support high-severity incidents and drive technical issue resolution within agreed SLAs.
• Develop and maintain runbooks, SOPs, technical documentation and operational best practices.
• Work with architects, development teams and project teams on technology changes and transformation initiatives.
• Review technology changes and identify potential operational and technical risks.
• Ensure new solutions meet production readiness and operational requirements.
• Coach technical team members and partner resources and promote knowledge sharing.
• Identify opportunities for service improvement, automation and operational efficiency.

Key Requirements

• 11–14 years of experience in Big Data, Data Platform Engineering or Infrastructure Engineering.
• Strong hands-on experience in the Hadoop ecosystem, including HDFS, YARN, Spark, MapReduce and HBase.
• Strong experience in Apache Kafka administration and Kafka internals.
• Experience managing OpenSearch / Elasticsearch clusters.
• Hands-on experience with AWS EMR and good knowledge of AWS Cloud services.
• Strong Linux system administration and scripting skills using Shell, Python or similar languages.
• Experience with Kerberos, access control, data security and governance.
• Experience supporting high-volume and low-latency production environments.
• Knowledge of Hadoop components such as Storm and other ecosystem technologies.
• Good understanding of JVM and virtual machine environments.
• Knowledge of SQL, Hive or other SQL-on-Hadoop technologies.
• Experience with ETL processes or ETL software is advantageous.
• Strong troubleshooting, analytical and problem-solving skills.
• Good communication and stakeholder management skills.
• Ability to work under pressure and participate in on-call support.

Good to Have

• AWS Cloud certification.
• Knowledge of PAM and Kerberos-based access control.
• Experience with hardware configuration, rack setup, disk topology and RAID.
• Knowledge of virtual machine deployment and configuration.
• Proficiency in Python, Java or Scala.
• Experience with ETL processes/software.
• Experience in banking, payments or other high-volume transaction environments.

EA Number: 11C4879