Ashok Nagar Delhi Delhi Senior data engineer – python & sql Jobs – 133 Open Jobs Today

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Senior Data Engineer

Lister Digital
Gurugram, Haryana

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Job details

Full-time

Qualifications

CI/CD
Spark
System design
SQL
OOP
AWS
PostgreSQL
Continuous integration
S3
Apache
Kafka
Unit testing
RDS database
Banking
Python
Design patterns

Full job description

About This Role

8 to 12 years of experience
Skills: Python, Spark, SQL, PostgreSQL , CI/CD practices

Role Overview

We are building a bespoke data platform focused on Financial Crime transaction analysis. The platform processes tens of millions of transaction records daily and enables large-scale analytics to identify suspicious patterns and behavioral anomalies.

We are looking for a hands-on Data Engineer with strong Python and Spark expertise who can design scalable data pipelines, perform large-scale data analysis, and contribute to the architecture of a high-volume data platform.

This role is ideal for engineers who enjoy deep coding, distributed data processing, and building custom data platforms rather than relying purely on managed tools.

Key Responsibilities

Build and maintain scalable data pipelines across stages such as data download, ingestion, and analysis within a bespoke data platform.
Develop high-performance data processing logic using Python and PySpark.
Perform large-scale transaction data analysis using custom algorithms and in-house logic to detect financial crime patterns.
Work with high-volume datasets (80–90 million records processed regularly) and optimize pipeline performance.
Design efficient data models and transformations for large-scale processing.
Write optimized SQL queries on PostgreSQL (RDS), leveraging:

Window functions
Partitioning
Query performance optimization

Work with Delta tables and Parquet-based storage formats for efficient data processing.

Build and maintain Spark batch and streaming jobs.
Implement engineering best practices including unit testing, static code analysis, and CI/CD practices.
Contribute to data platform architecture and system design decisions.

Required Skills

Core Engineering Skills

Strong Python programming expertise

Deep understanding of:

Functional programming
Object-Oriented Programming (OOP)
Design patterns
Python execution and invocation mechanisms

Hands-on experience with Apache Spark / PySpark

Strong SQL expertise including:

Window functions
Partitioning
Query optimization

Experience building end-to-end data pipelines

Data Platform Engineering

Experience designing scalable data processing architectures

Strong understanding of distributed data processing

Familiarity with standard data pipeline engineering practices, including:

Unit testing
Static code analysis (Sonar or similar)
Code linting
Pipeline reliability and monitoring

Good to Have

AWS exposure (especially EMR and S3)

Experience with Apache Airflow for job orchestration and scheduling

Exposure to Kafka or streaming architectures

Familiarity with Databricks environments (as upstream data source)

Experience working in banking, financial services, or financial crime analytics

Tech Stack

Languages: Python, SQL
Processing: Apache Spark / PySpark
Storage: Delta Tables, Parquet
Database: PostgreSQL (RDS)
Orchestration: Airflow (good to have)
Cloud: AWS (EMR, S3 – good to have)
Code Quality: Sonar, Unit Testing, Linting

What We're Looking For

Strong hands-on engineer, who can do more that using standard ETL tools.
Comfortable working with large-scale datasets
Ability to design and build scalable data platform components
Someone who enjoys solving complex data engineering problems through code

Apply now

Apply Now

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senior data engineer – python & sql jobs in ashok nagar delhi delhi

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