Rajneesh Kumar

Staff-level Data Engineer with 12+ years building petabyte-scale data infrastructure, streaming platforms, and ML enablement ecosystems across FinTech, healthcare, and CPG. At Credit Karma, I own enterprise-grade data platforms on Google Cloud serving 135M+ members - from real-time ingestion pipelines to self-service SDKs adopted across the organization. My work sits at the intersection of data engineering and AI enablement. I have built production Python SDKs, Terraform-driven infrastructure automation, LLM-powered metadata and discovery platforms, and computer vision pipelines - always with reliability, security, and cost efficiency in mind. I operate at the intersection of deep technical ownership and business outcomes. Whether reducing ML training time from 3.5 hours to 30 minutes, cutting BigQuery scan costs by 95%, or architecting a clean room for privacy-preserving data collaboration - I focus on building systems that actually get used and matter at scale. What I bring: - Distributed systems: Spark, Kafka, Flink, Airflow, Pub/Sub - Cloud & IaC: GCP (BigQuery, Vertex AI, Composer), AWS, Terraform - Data governance & quality: Monte Carlo, Dataplex, PII-safe architectures - ML & AI: PyTorch, XGBoost, computer vision, LLM-assisted workflows - Languages: Python, SQL, Scala, Java M.Tech from IIT Kharagpur. Based in Charlotte, NC. Always open to conversations on data platform architecture, ML infrastructure, and building engineering cultures that ship high-quality data products.