End to end ownership of our data warehousing infrastructure, its KPIs and its SLAs.
Design, build, and optimize large-scale, high-performance data pipelines to support analytics, product insights, and operational workflows.
Architect and evolve Sezzle’s data ecosystem, driving improvements in reliability, scalability, and efficiency.
Help Sezzle evolve our data systems beyond the current scale and stack with whatever tooling is necessary to handle processing high volumes of events and performing complex ETL.
Lead development of ETL/ELT workflows on our current tooling using Redshift, DBT, AWS DMS, and related modern data tooling.
Partner with cross-functional teams (engineering, analytics, product, finance, risk) to gather or adapt requirements and deliver robust, high-quality datasets.
Evaluate and integrate new technologies, guiding the evolution of Sezzle’s data stack and infrastructure.
Optimize Redshift and warehouse performance, including query tuning, modeling improvements, and cost management.

12+ years of experience in data engineering, with a strong track record of building and scaling production-grade systems.
Deep expertise with AWS Redshift or similar products, including performance tuning, table design, and workload management.
Strong hands-on experience with ETL/ELT frameworks, especially DBT, AWS DMS, or similar tools.
Proficiency in SQL (advanced level) and at least one programming language such as Python, Scala, or Java.
Experience building and maintaining AWS-based data platforms, including S3, Lambda, Glue, or EMR.
Track record designing scalable, fault-tolerant data pipelines using modern orchestration tools (Airflow, Dagster, Prefect, etc.) processing more than 100GB
1 TB of new data a day
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.

Unlimited PTO, volunteer hours and sabbatical
Life, STD/LTD, medical, dental and vision insurance
Highly discounted LifeTime gym membership
401k with match
Collaborative fun co-workers
The opportunity to join the fastest growing FinTech alongside a team of motivated and driven individuals

Principal Engineer – Data Infrastructure

Key skills