Database Developer, Citi

Citi

Location:
Canada, Mississauga

Category:
IT - Software Development

Contract Type:
Employment contract

Salary:

Not provided

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Job Description:

The candidate will be responsible for designing and maintaining grammar using JavaCC, implementing processors and visitors, and developing business rules based on ASTs (Abstract Syntax Trees). This role also involves integrating with Apache Spark applications and working with data stored in Oracle, Hive, and HDFS.

Job Responsibility:

Design and implement grammars with JavaCC and integrate through Visitors
Build and maintain processors to execute rules based on ASTs
Develop and optimize Java integrations with Apache Spark
Analyze, interpret, and optimize Spark DAGs to improve job performance and resources usage
Work with Hive and Oracle to extract and manipulate large datasets
Manage and organize data in HDFS, ensuring performance and scalability
Collaborate with team on code reviews, architecture discussions, and continuous improvements

Requirements:

Strong experience with Java (preferably Java 8++)
Advanced knowledge of Apache Spark (DataFrames, job executions, DAG optimizations)
Hands-on experience with JavaCC (grammar creation, ASTs, visitors)
Proficiency in Hive and Oracle (queries, large-scale data manipulations)
Practical experience with HDFS (read/write operations, data organization)
Strong analytical and problem-solving skills

Nice to have:

Experience in Big Data projects within regulatory or financial reporting contexts
Knowledge of distributed ETL and data engineering best practices
Experience with Unix/Linux and shell scripting (ksh/bash)
Familiarity with Maven and CI/CD practices

Additional Information:

Job Posted:
October 02, 2025

Employment Type:

Fulltime

Work Type:

Hybrid work

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Database Developer