Compensation Principal development role, 12+ years experience: $6,000 – $12,500 USD per month (gross). About the Role Seeking a talented and motivated Principal Engineer for our Data Infrastructure. Opportunity to thrive in a dynamic, fast‑paced environment within a rapidly growing team, with prospects for career advancement. Responsibilities End‑to‑end ownership of our database and data warehousing infrastructure, its KPIs and SLAs, including MySQL, Postgres, CDC capture, and Redshift. Lead optimizations in database and query performance. Build and maintain tooling to help manage and upgrade our data infrastructure, continually improving with migrations and optimizations. Partner with Development to ensure we ship solid queries against a battle‑tested schema to meet the needs of our products and business. Help Sezzle evolve our data systems beyond the current scale and stack with whatever tooling is necessary to handle processing high volumes of writes and events while performing complex ETL. Evaluate and integrate new technologies, guiding the evolution of Sezzle's data infrastructure. Help data engineers and analysts optimize Redshift and warehouse performance, including query tuning, modeling improvements, and cost management. Qualifications 12+ years of experience in DBA, SRE, or Data Engineering roles, with a strong track record of scaling production‑grade systems. Deep expertise with MySQL, Postgres, AWS Redshift or similar products, including performance tuning, table design, and workload management. Advanced proficiency in SQL. Strong hands‑on experience with data replication and ETL/ELT frameworks, especially DBT, AWS DMS, or similar tools. Strong understanding of data modeling, distributed systems, and warehouse/lake design patterns. Ability to work in a fast‑paced, collaborative environment with excellent communication and documentation skills. Preferred Knowledge and Skills Prior experience in high‑growth, data‑intensive fintech or similar regulated environments. Knowledge of lakehouse architectures and modern stacks such as Snowflake, Databricks, Iceberg, or Delta Lake. Experience designing scalable, fault‑tolerant data pipelines using modern orchestration tools (Airflow, Dagster, Prefect, etc.) processing anywhere from 100GB to 1TB of new data a day. Familiarity with streaming technologies (Kafka, Kinesis, Flink, Spark Streaming). High enthusiasm for using AI to be as productive as possible. About You You have relentlessly high standards and continually raise the bar. You focus on defect prevention and ensure problems are fixed permanently. You are not bound by convention and thrive on developing new ways to do things. You prioritize speed and decision making, valuing calculated risk‑taking. You earn trust, listen attentively, speak candidly, and treat others respectfully. You have backbone, can respectfully challenge decisions even when uncomfortable, and commit fully once a decision is made. You deliver results with high quality and timeliness, and rise to setbacks without settling. Technology Stack Languages: Golang, Typescript, Python. Frontend: Typescript – React and ReactNative. Version Control: Git. CI/CD: Gitlab. Testing: Developer and AI‑driven, focus on automated end‑to‑end, integration, and unit tests. #J-18808-Ljbffr