Skill: Python, Pyspark, SQL
Exp: 6 to 12 years
Location: Pune
We are seeking a highly skilled Python / PySpark / SQL Developer to design, develop, and optimize large-scale data processing pipelines. The ideal candidate will have strong expertise in Python programming, PySpark for distributed data processing, and SQL for data querying and transformation. You will work closely with data engineers, analysts, and business stakeholders to deliver efficient, scalable, and reliable data solutions.
Key Responsibilities:
- Design, develop, and maintain ETL/ELT pipelines using PySpark and Python.
- Write optimized SQL queries for data extraction, transformation, and loading.
- Work with big data platforms (e.g., Hadoop, Databricks, AWS EMR, Azure Synapse, or GCP Dataproc).
- Implement data quality checks, validation, and error handling in pipelines.
- Optimize PySpark jobs for performance and scalability.
- Collaborate with cross-functional teams to understand data requirements and deliver solutions.
- Maintain documentation for data flows, transformations, and processes.
- Ensure data security, compliance, and governance standards are met.
- Troubleshoot and debug data processing issues in production environments.
Required Skills & Qualifications:
- 3+ years of experience in Python development.
- Strong hands-on experience with PySpark (RDDs, DataFrames, Spark SQL).
- Proficiency in SQL (complex joins, window functions, CTEs, performance tuning).
- Experience with big data ecosystems (HDFS, Hive, Delta Lake, etc.).
- Familiarity with cloud data platforms (AWS, Azure, or GCP).
- Strong understanding of data modeling and ETL best practices.
- Experience with version control (Git) and CI/CD pipelines.
- Knowledge of performance tuning for Spark and SQL queries.
- Excellent problem-solving and communication skills.
Preferred Skills:
- Experience with Airflow, Luigi, or other workflow orchestration tools.
- Knowledge of NoSQL databases (Cassandra, MongoDB, etc.).
- Familiarity with containerization (Docker, Kubernetes).
- Exposure to machine learning pipelines in Spark.
- Understanding of data warehousing concepts (Snowflake, Redshift, BigQuery).
What we offer
- The chance to work with impact. Here, you’re empowered to bring your biggest thinking to help our company and clients improve everyday life.
- Ownership over your career. Stay at the top of your game through our award-winning learning and development ecosystem. And when your ambitions change or we offer new opportunities, we help you pivot by providing reskilling, on-the-job learning and guidance to find new roles that might be a better fit.
- The opportunity to thrive on a high caliber team with heart. We celebrate each other’s experiences and perspectives and promote a sense of belonging through our affinity groups and diversity and inclusion initiatives.
- A comprehensive total rewards package, including a competitive salary and a pension plan with matching contributions.
- Flexible health and financial benefits to support you and your eligible dependents—from day one.
- True work-life balance. Be at your best through paid time off, flexible work arrangements, volunteering opportunities, social events, and so much more.
About us
Cognizant (Nasdaq: CTSH) is an AI Builder and technology services provider, building the bridge between AI investment and enterprise value by building full-stack AI solutions for our clients. Our deep industry, process and engineering expertise enables us to build an organization’s unique context into technology systems that amplify human potential, realize tangible returns and keep global enterprises ahead in a fast-changing world. See how at www.cognizant.com or @cognizant.
Other employment-related information
Cognizant is an equal opportunity employer. Your application and candidacy will not be considered based on race, color, sex, religion, creed, sexual orientation, gender identity, national origin, disability, genetic information, pregnancy, veteran status or any other characteristic protected by federal, provincial or local laws.
If you have a disability that requires reasonable accommodation to search for a job opening or submit an application, please email [email protected] with your request and contact information.
Language requirements vary depending on roles, but we ask that all candidates have basic English proficiency for company-wide communications purposes. For roles based in Quebec, professional English proficiency is required, as you’ll deliver services to and collaborate with stakeholders outside the province who may not speak French.
