[Hiring] Senior Database Engineer @EPAM Systems

Role Description

We are seeking a Senior Database Engineer to join our team. This role offers the chance to work on complex data systems that support critical business operations at scale. You'll be part of a team that values technical depth, problem-solving, and a proactive approach to maintaining robust infrastructure. This position is well-suited for someone who enjoys tackling challenging database architecture problems and contributing to long-term system reliability.

• Plan Cassandra cluster deployments by estimating data volume and determining hardware requirements based on projected data size and transaction load.
• Set up, install, and configure new Cassandra clusters from the ground up.
• Employ monitoring tools to track cluster availability and overall performance.
• Export stored data into various formats as needed for downstream use.
• Apply primary and secondary indexes appropriately to enable efficient data querying.
• Carry out backup and restore procedures to protect the system against potential failures.
• Fine-tune performance settings related to the Java Virtual Machine, caching mechanisms, and compaction processes.
• Run stress tests against Cassandra clusters and interpret the resulting performance metrics.

Qualifications

• A minimum of three years of hands-on, relevant professional experience.
• Deep knowledge of designing and building Cassandra or other NoSQL database systems.
• Any exposure to Astra or AWS Keyspaces platforms.
• Practical skill in Cassandra data modeling, NoSQL architecture design, and managing keyspaces, tables, indexes, user creation, and access permissions.
• Solid understanding of Cassandra's internal mechanisms, including the gossip protocol, hinted handoffs, read repair processes, and Merkle trees.
• Working knowledge of Linux systems and Java configuration.
• Familiarity with MongoDB.
• Understanding of tombstone management and garbage collection/purging processes.
• Experience administering, maintaining, and supporting clusters using tools such as Opscenter, Devcenter, Linux, and Spark.
• Ability to write CQL queries to support integration with Cassandra clusters.
• Basic experience configuring CI/CD pipelines.
• Solid communication skills with English fluency at a B2 level or higher, enabling clear understanding of business requirements and their translation into agentic architectures.

Requirements

• Experience working with DataStax Enterprise (DSE) is a plus.
• Familiarity with AWS services, including at minimum Elastic Compute, S3, and IAM.
• Background integrating systems with Solr and Spark.
• Exposure to automation and CI/CD tools such as Jenkins, GitLab CI, or TeamCity.
• Knowledge of Terraform, CloudFormation, and Python.