C

Citi

Runs banking and payments for global clients

PySpark Engineer

Data EngineeringConfirmed live in the last 24 hours
Full-timeGurugram, Haryana, IndiaNo salary listedHybrid

About the Job

Requirements

  • A bachelor's or master's degree in Computer Science, Software Engineering, Information Technology, Data Science, or a related quantitative field, or equivalent practical experience.
  • At least 4 years of hands-on experience building and deploying production-grade PySpark applications at enterprise scale.
  • In-depth knowledge of Spark internals, including RDDs, Catalyst Optimizer, DAG execution, shuffling, and narrow versus wide dependencies.
  • Proven ability to debug memory bottlenecks and out-of-memory errors and resolve data skew issues.
  • Experience implementing modular code architectures, logging, monitoring, and alerting.
  • Knowledge of Apache Spark, PySpark (Spark SQL, DataFrames, Datasets, and Structured Streaming), and Python 3.x.
  • Advanced SQL skills, including query optimization, indexing, and window functions.
  • Knowledge of data lake and lakehouse technologies and formats, including Delta Lake, Apache Iceberg, Apache Hudi, Parquet, Avro, and ORC.
  • Knowledge of workflow orchestration tools including Apache Airflow, Luigi, Prefect, or Databricks Workflows.
  • Knowledge of at least one cloud platform: AWS (EMR, Glue, S3, Redshift), Azure (Synapse, ADLS, HDInsight), or GCP (Dataproc, BigQuery, GCS).
  • Knowledge of streaming technologies including Apache Kafka, Spark Structured Streaming, Event Hubs, or Kinesis.

Responsibilities

  • Architect, build, and maintain scalable ETL/ELT pipelines using PySpark and Python to ingest batch and streaming data from Kafka, relational databases, REST APIs, and object storage.
  • Design and implement lakehouse architectures using Delta Lake, Apache Iceberg, or Apache Hudi.
  • Build reusable frameworks and data ingestion libraries to standardize enterprise data processing.
  • Diagnose and tune Spark application performance, including memory allocation, partitions, execution plans, broadcast joins, data skews, and garbage collection.
  • Optimize query execution plans using Catalyst Optimizer and the Tungsten execution engine.
  • Monitor and troubleshoot production Spark jobs across YARN, Kubernetes, or Databricks cluster environments.
  • Collaborate with Data Architects to design dimensional (star/snowflake), normalized, and Data Vault schemas for analytical workloads.
  • Ensure efficient data storage, partitioning strategies, and file format selection, including Parquet, ORC, and Avro.
  • Schedule and orchestrate complex workflow DAGs using Apache Airflow, Prefect, or Dagster.
  • Implement CI/CD pipelines using Git, Jenkins, GitLab CI, or GitHub Actions for automated testing, packaging, and deployment of data pipelines.
  • Write unit tests, integration tests, and data validation routines using tools such as Great Expectations and PyTest.
  • Implement enterprise data governance, lineage tracking, metadata management, and data quality frameworks.
  • Ensure data security through masking, tokenization, and role-based access control, and comply with regulatory privacy standards such as GDPR and CCPA.

Desired Qualifications

  • Hands-on experience with the Databricks platform, including Delta Lake, Unity Catalog, Photon engine, and MLflow.
  • Familiarity with Scala or Java in addition to Python.
  • Knowledge of DataOps and Infrastructure as Code tools such as Terraform or CloudFormation.
  • Experience with analytical data warehouses such as Snowflake, Google BigQuery, or Amazon Redshift.
  • Relevant certifications, such as Databricks Certified Data Engineer Associate or Professional, AWS Certified Data Engineer, Azure Data Engineer Associate (DP-203), or CCA Spark and Hadoop Developer (or equivalent).

About the Company

Citi

Runs banking and payments for global clients

Citi runs banking, investment and payment services for companies, governments and individuals around the world. Its global network connects institutions with local banking systems, while its US consumer business sells credit cards and deposit accounts. Corporate clients use Citi to manage cash, finance trade and raise capital, and investors use its trading, custody and wealth services to hold and manage assets. The bank earns interest on loans and fees from payments, securities transactions, financial advice and account services. Citi traces its banking roots to 1812; the Citigroup holding company was formed in 1998, and its headquarters are in New York City.

Company size
10,001+
Company stage
IPO
Headquarters
New York City, New York
Founded
1812

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