Senior Data Engineer

5 days ago

Bucharest, Bucureşti, Romania Qualitest acq Full time 60,000 - 120,000 per year

We're looking for a highly skilled and opinionated Senior Data Engineer to join a Data Platform team.

If you thrive in cloud-native, high-scale environments and enjoy full ownership of the data lifecycle - from design to deployment - this role is for you.

You'll work closely with data scientists, ML engineers, and product teams to build scalable, production-ready data infrastructure leveraging Apache Spark, AWS services, and Infrastructure-as-Code.

Responsibilities

  • Influence Data Architecture: Design scalable, secure data platforms using Spark (EMR), Glue, and AWS event-driven services.
  • Develop Scalable Pipelines: Build batch & streaming ETL/ELT pipelines with Spark EMR, Athena, Iceberg, EKS, Lambda.
  • Drive Innovation: Introduce patterns like data mesh, serverless analytics, and schema-aware pipelines.
  • Cross-Team Collaboration: Work with ML, backend, and product teams to deliver data-powered solutions.
  • Operational Excellence: Apply observability, cost control, performance tuning, and CI/CD automation using CloudWatch, Step Functions, Terraform/CDK.
  • Security: Implement AWS best practices for IAM, encryption, compliance, and auditability.

Requirements

  • 8+ years of experience in software development, at least 3+ years of experience in data engineering, with proven responsibility for designing, developing, and maintaining large-scale, distributed data systems in cloud-native environments (AWS).
  • End-to-end ownership of complex data architectures – from data ingestion to processing, storage, and delivery in production-grade systems.
  • Deep understanding of data modeling, data quality, and pipeline performance optimization.

Technical Expertise

  • AWS Services: Strong hands-on experience with S3, Lambda, Glue, Step Functions, Kinesis, and Athena – including building event-driven and serverless data pipelines - MUST
  • Apache Spark: Expertise in writing efficient Spark jobs using PySpark, with experience running workloads on AWS EMR and/or Glue for large-scale ETL and analytical tasks.
  • Solid experience in building and maintaining both batch and real-time (streaming) data pipelines and integrating them into production systems.
  • Infrastructure as Code (IaC): Proficient in using Terraform, AWS CDK, or SAM to automate deployment and manage scalable data infrastructure.
  • Python as a primary development language (with bonus points for TypeScript experience).
  • Comfortable working in agile, fast-paced environments, with strong debugging, testing, and performance-tuning capabilities.

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