Sushma Dasari
Data Engineer • Connecticut, USA • s**********@gmail.com • +14******563 • linkedin.com/•••••
Professional Summary
Data Engineer with 4+ years of experience designing, building, and operating cloud data platforms and ETL pipelines on AWS and Google Cloud. Proven track record in Spark-based ETL, Airflow orchestration, Delta Lake data lakes, BigQuery optimization, and HIPAA-compliant pipeline design. Experienced supporting ML workflows via feature engineering and SageMaker integrations to deliver production fraud-detection capabilities. Seeking to contribute platform ownership, data quality automation, and scalable pipeline engineering to a cloud-first data team.
Technical Skills
Programming Languages: Python,Shell Scripting
Frameworks and Libraries: Pandas,NumPy
Databases: SQL,Oracle,PostgreSQL,MySQL
Cloud and DevOps: AWS S3,AWS SageMaker,AWS CloudFormation,AWS IAM,Google BigQuery
Data and Analytics: Apache Spark,Apache Airflow,AWS Glue,Delta Lake,Parquet,Apache Kafka,Data Lineage Tracking,SQL-based Data Validation,AWS CloudWatch,Tableau
ML & Feature Engineering: Feature Engineering
Work Experience
Cigna Corporation
Connecticut, USA
Data Engineer
June 2025 – Present
Tech Stack: AWS S3, Delta Lake, Apache Spark, AWS Glue, Apache Airflow, AWS SageMaker, AWS CloudFormation, AWS IAM, AWS CloudWatch, Python, SQL, Parquet
- Built a claims data lake on AWS S3 using Delta Lake with date-based partitioning and Z-order indexing across 10M+ records, improving query latency by 30% for analytics and reporting workloads.
- Designed and maintained Apache Airflow DAGs to orchestrate ETL across 15+ legacy systems, implementing SLA enforcement, retry policies, and threshold-based data quality checks to reduce pipeline failure rates by 80%.
- Engineered Spark and AWS Glue feature pipelines to precompute fraud signals and store versioned feature sets in Delta Lake, cutting ML model training time by 35% and enabling reproducible training cycles.
- Optimized recurring Spark ETL workloads through partition tuning, executor memory adjustments, and broadcast-join strategies to resolve data skew and reduce processing bottlenecks during peak ingestion.
- Deployed AWS SageMaker inference endpoints and integrated live fraud scoring into the claims pipeline; collaborated with data scientists on feature schemas and endpoint monitoring to ensure production reliability.
- Automated provisioning of ETL environments with AWS CloudFormation, enforced IAM least-privilege roles, enabled S3 encryption and CloudWatch logging to satisfy HIPAA compliance and audit requirements.
Cognizant Technology Solutions
Hyderabad, India
Data Engineer
August 2020 – December 2023
Tech Stack: Oracle, Google BigQuery, Python, SQL, Tableau, Checksum verification, Data lineage mapping
- Migrated 50M+ historical records from Oracle to Google BigQuery using Python and SQL ETL pipelines with row-count reconciliation and checksum verification, achieving zero data loss and reducing cloud costs by 35%.
- Developed automated SQL-auditing scripts to validate 100+ migrated datasets — row counts, null/type/range checks — surfacing anomalies early and protecting downstream reporting accuracy.
- Implemented date-based partitioning and clustering in BigQuery on high-selectivity columns, improving query performance by 40% for enterprise reporting workloads.
- Produced 10+ Tableau dashboards connected to BigQuery to present migration progress, data quality metrics and KPIs for 15+ stakeholders, eliminating manual reporting cycles via scheduled refreshes.
- Standardized ETL documentation and created data lineage maps tracing datasets from Oracle to BigQuery, reducing subject matter expert dependency by 30% and accelerating post-migration issue resolution.
- Collaborated with engineering and QA to introduce automated reconciliation and regression checks into the migration pipeline, reducing post-migration defects and rework during cutover phases.
Education
Sacred Heart University
Master of Science in Computer Science and Information Technology • Connecticut, USA • May 2025
Vignan’s Lara Institute of Technology and Sciences
Bachelor of Technology in Computer Science and Engineering • India
Certifications
Oracle AI Cloud Database Services 2025 Certified Professional — Oracle Corporation • 2025
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