Senior Data Engineer
Polymarket is a decentralized information markets platform that lets users bet on the outcome of real-world events.
About Polymarket
Polymarket is an information markets platform where users can trade on the outcomes of various events, leveraging the power of free markets to forecast the future. It provides a mechanism for users to bet on real-world events and earn money based on the outcomes.
Skills
About the Role
You will own the OLAP analytics layer from raw event ingestion through API-serving views, including materialized views, query planning, refresh schedules, and cost optimization. You will partner on high-write OLTP tables, improving partitioning, indexing, triggers, autovacuum, and read-path latency. You will define Kafka schema contracts, evolve S3 data lake layouts, develop validation tooling, and design scalable event-sourced data models for analytics such as PnL and position tracking. You will also coordinate schema contracts with upstream and downstream consumers.
Requirements
- 5+ years of data engineering experience on production systems serving users at scale
- Deep knowledge of OLTP and OLAP split architectures
- Columnar warehouse expertise, preferably ClickHouse
- Data lake experience with Parquet, Iceberg or Delta/Hudi, compaction strategies, and S3 layouts
- Streaming pipeline experience with Kafka, delivery semantics, backpressure, consumer groups, and schema evolution
- Strong data modeling knowledge, including star and snowflake schemas, SCD, CDC, and idempotent event sourcing
- PostgreSQL experience at scale, including partitioning, indexing, autovacuum, query planning, and replication
- SQL fluency at warehouse scale
- Distributed systems reasoning, including consistency, ordering, replay, and mutable state
Responsibilities
- Own the OLAP analytics layer from raw event ingestion through API-serving views
- Design materialized views, refresh cadences, dictionary catalogs, query plans, and cost optimizations
- Partner on high-write OLTP serving tables, including partitioning, indexing, triggers, autovacuum tuning, and bloat monitoring
- Define Kafka topic schema contracts and evolve the S3 lake layout
- Contribute to parity-validation tooling for data correctness during migrations
- Design event-sourced data models and derivative analytics for PnL, positions, and cohorts
- Coordinate schema contracts with upstream teams and downstream consumers
Benefits
- Equity
- Unlimited PTO
- Health coverage
- Vision coverage
- Dental coverage
- 401k match
- New MacBook Pro
- Display and accessories