Remote Senior Data Architect — Cassandra Migration Lead

Bitrock; Italia; Remoto; EUR 90.000 - 130.000; Tempo pieno

Vantaggi offerti da questo lavoro

Remote work

Descrizione del lavoro

Bitrock is seeking a Senior Data Architect Freelance to lead the evolutionary migration of a production Cassandra 3.11 cluster to Cassandra 5.0 with a parallel-cluster architecture and zero downtime.

You will be the technical reference for data and work with the client, DevOps engineers, backend developers, and the project manager from initial assessment through cutover and support, defining capacity, retention, and validation plans.

Competenze

• Proven experience in technical roles on projects using Apache Cassandra in production.
• In-depth knowledge of Cassandra data modelling, particularly for time series and IoT data.
• Hands-on experience with Cassandra operations: compaction, repair (Cassandra Reaper or equivalent), backup and restore, JVM and storage tuning, troubleshooting of latencies and hot partitions.
• Experience with at least one major Cassandra migration or upgrade, preferably involving schema changes.
• Good knowledge of Linux and bare-metal infrastructure.
• Experience in technically leading a team and presenting architectural decisions to both technical and business stakeholders.
• Excellent command of Italian, written and spoken: the role involves daily interaction with the client and writing technical documentation in Italian.

Mansioni

• Lead the assessment of the existing cluster: analysis of SSTables, partitions, tombstones and workload.
• Design the target data model (DDL, bucket granularity, compaction strategies, TTL and retention).
• Define the capacity model and hardware sizing of the new cluster across three failure domains.
• Provide technical direction for historical data migration and validation planning.
• Support backend team in adapting queries to the new data model.
• Define acceptance criteria: p95 latencies, data integrity, rollback procedures.
• Write and present design documents, migration plans and technical reports.
• Act as third-level escalation on Cassandra and data architecture during maintenance.

Conoscenze

Apache Cassandra

Linux

Team leadership

Italian

Strumenti

Cassandra Reaper

JVM tuning

Spark Cassandra Connector

Descrizione del lavoro

Bitrock is seeking a Senior Data Architect Freelance to lead the evolutionary migration of a production Cassandra 3.11 cluster to Cassandra 5.0 with a parallel-cluster architecture and zero downtime.

You will be the technical reference for data and work with the client, DevOps engineers, backend developers, and the project manager from initial assessment through cutover and support, defining capacity, retention, and validation plans.