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Data Engineer

3 weeks ago

Québec, Quebec, Canada Princeton IT Services Full time

Job Title: Data Engineer – Python, PySpark & SQL

Location: Canada

Job Type: Full time contract

We are looking for a strong Lead Data Engineer with deep experience in Python, PySpark, SQL, and AWS to design, develop, and optimize large-scale data pipelines. This role requires strong hands-on coding skills, the ability to validate and process complex raw data, and expertise in running and tuning PySpark jobs on EMR.

Responsibilities

  • Build scalable data ingestion and transformation pipelines using Python, PySpark, and SQL.
  • Process raw CSV/text files from AWS S3, including validating headers, schema checks, and malformed file detection.
  • Convert raw data into structured DataFrames and implement reusable data quality checks.
  • Develop advanced transformations using SQL/PySpark (Window functions, LAG(), grouping logic, date gap detection, etc.).
  • Deploy and tune PySpark applications on AWS EMR, optimizing executor memory, cores, shuffle behavior, and cluster performance.
  • Work with AWS services such as S3, EMR, Glue, Lambda, IAM.
  • Debug performance issues (OOM errors, shuffle spill, GC problems) and improve pipeline reliability.
  • Lead design discussions, code reviews, and mentor junior engineers.

Required Skills

  • 8+ years of experience in Data Engineering.
  • Expert Python (file processing, scripting, validation automation).
  • Strong PySpark (DataFrames, job tuning, distributed processing).
  • Advanced SQL (analytical functions, performance tuning).
  • Hands-on with AWS data stack: S3, EMR, Glue, Lambda.
  • Strong understanding of Spark memory allocation, YARN container usage, and EMR resource tuning.
  • Excellent debugging, communication, and problem-solving skills.

Nice to Have

  • Airflow or Databricks experience.
  • Terraform or CloudFormation.
  • Experience with data lake formats (Delta, Iceberg, Hudi).

Job Type: Full-time

Pay: $50.00-$53.00 per hour

Experience:

  • Data Engineer: 10 years (required)
  • Pyspark: 4 years (required)
  • Python: 6 years (required)
  • AWS: 4 years (required)