Senior Data Engineer - Real-Time Analytics

Role Overview: Senior Real-time Data Engineer to lead the architecture and development of our customer-facing analytics engine. Our Sales Engagement Platform processes millions of events daily - from email interactions to live call metadata. Your mission is to transform this firehose of raw data into high-performance, actionable insights for our users. You will bridge the gap between backend data systems and the user interface, building a robust Semantic Layer that ensures our customers see the same "Single Source of Truth" across every dashboard, report, and API. Key Responsibilities: - Architecture & Scaling: Design and maintain a low-latency analytics stack capable of handling high-concurrency queries from thousands of concurrent SaaS users. - Real-time Ingestion: Build and optimize ingestion pipelines that move data from transactional databases (PostgreSQL) and event streams (Kafka/Kinesis) into Apache Pinot. - Semantic Layer Development: Use Cube (Cube.js) to model complex sales metrics (e.g., "Sequence Conversion Rate," "Attributed Revenue," "Meeting Booked Rate") ensuring consistency across the application. - Performance Engineering: Optimize Apache Pinot tables, indexing strategies, and Cube pre-aggregations to ensure dashboard widgets load in under 300ms. - API Strategy: Expose data models via REST/GraphQL APIs, collaborating closely with Frontend Engineers to build world-class data visualizations. - Data Governance: Implement multi-tenant security logic within the semantic layer to ensure strict data isolation between different customer accounts. Technical Requirements: - OLAP Expertise: 3+ years of experience with Apache Pinot (or similar technologies like ClickHouse/StarRocks) in a production environment. - Semantic Modeling: Deep experience with Cube (Cube.js), including advanced features like pre-aggregations, security contexts, and multi-tenant configurations. - Data Store Mastery: Expert-level knowledge of PostgreSQL, specifically in the context of analytical query optimization and Change Data Capture (CDC). - Streaming & Ingestion: Hands-on experience with real-time data movement (Debezium, Kafka, or Flink). - Software Craftsmanship: Proficiency in Node.js or Python, with a focus on building scalable backend services. - Language: Mastery of complex SQL and the ability to translate business logic into code-based data schemas. Bonus Points: - Experience building analytics specifically for CRM or Sales Tech ecosystems. - Contributions to open-source projects (specifically in the Pinot or Cube communities). - Experience with Infrastructure as Code (Terraform, Kubernetes) for managing data clusters.