Data Engineer (ClickHouse)

Confidential

Limassol permanent

Posted: January 30, 2026

Job Description

⭐️ CoreStar is a dynamic technology company supporting partners in heavy load industries, high-performance solutions. Our expert teams bring a startup-driven mindset, focusing on innovation, collaboration, and efficiency in every project. At CoreStar, you’ll have the opportunity to grow your skills, tackle exciting challenges, and directly contribute to impactful products.

Project Overview:

High-load in-house platform handling multiple third-party integrations, data collection, and comprehensive reporting systems. The system processes large volumes of real-time data and requires high availability with performance optimization.

Stack:

AWS, S3, Lambda, Kafka/MSK, Debezium/CilckPipes, MySQL (RDS), ClickHouse, Tablue, Terraform/CDK, Git, NodeJs/Python, SQL

📌 Key Responsibilities:

Design and maintain scalable ETL/ELT pipelines

Handle CDC ingestion from Amazon RDS (MySQL) via Debezium + Kafka

Load and optimize high-throughput data flows into ClickHouse

Tune ingestion in ClickHouse: partitioning, TTLs, ORDER BY keys

Use Parquet/ORC and partitioning for efficient storage in S3

Integrate datasets into BI

Implement monitoring and alerting for data pipelines

Use Git + CI/CD and manage infrastructure with Terraform or AWS CDK

📌 Requirements:

Proven experience building high-throughput data ingestion pipelines

Proficiency with Kafka/MSK and Debezium or CilckPipes

Experience with ClickHouse and Warehouse concepts and architecture

SQL, Git, CI/CD

Infrastructure-as-Code: Terraform

📌 Nice to have:

Design and maintain scalable ETL/ELT pipelines using AWS Glue, Airflow, and S3

Experience with dbt

Familiarity with MySQL binlog-based CDC

BI reporting knowledge

Experience monitoring and tuning ClickHouse, quries, NodeJS

📌 Benefits:

24 working days of paid annual leave

6 days of paid sick leave

Official employment

Medical insurance

Coffee zone with fruit & snacks available in the office

Corporate Lunch provided by the company

Gym and sports classes

Healthy and friendly work atmosphere

Join us and be one of the Core Stars! ⭐

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