Principal Engineer

• Deep expertise with AWS Redshift or similar products, including performance tuning, table design, and workload management. • AWS Redshift or similar products • Strong hands-on experience with ETL/ELT frameworks, especially DBT, AWS DMS, or similar tools. • ETL/ELT frameworks • AWS DMS • Proficiency in SQL (advanced level) and at least one programming language such as Python, Scala, or Java. • Python • Scala • Experience building and maintaining AWS-based data platforms, including S3, Lambda, Glue, or EMR. • AWS-based data platforms • 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 • scalable, fault-tolerant data pipelines • Strong understanding of data modeling, distributed systems, and warehouse/lake design patterns. • data modeling • Ability to work in a fast-paced, collaborative environment with excellent communication and documentation skills. • Prior experience in high-growth, data-intensive fintech or similar regulated environments. • high-growth, data-intensive fintech • Familiarity with streaming technologies (Kafka, Kinesis, Flink, Spark Streaming). • streaming technologies • Knowledge of lakehouse architectures and modern stacks such as Snowflake, Databricks, Iceberg, or Delta Lake. • lakehouse architectures • Exposure to machine learning pipelines, feature stores, or MLOps concepts. • machine learning pipelines • Experience leading data platform migrations, warehouse re-architectures, or large-scale performance overhauls. • data platform migrations • Enthusiasm for automation, CI/CD for data, and infrastructure as code (Terraform, CloudFormation). • automation • You have relentlessly high standards - many people may think your standards are unreasonably high. You are continually raising the bar and driving those around you to deliver great results. You make sure that defects do not get sent down the line and that problems are fixed so they stay fixed. • You’re not bound by convention - your success—and much of the fun—lies in developing new ways to do things • You’re not bound by convention • You need action - speed matters in business. Many decisions and actions are reversible and do not need extensive study. We value calculated risk-taking. • You need action • You earn trust - you listen attentively, speak candidly, and treat others respectfully. • You earn trust • You have backbone; disagree, then commit - you can respectfully challenge decisions when you disagree, even when doing so is uncomfortable or exhausting. You have conviction and are tenacious. You do not compromise for the sake of social cohesion. Once a decision is determined, you commit wholly. • You have backbone; disagree, then commit • You deliver results - you focus on the key inputs and deliver them with the right quality and in a timely fashion. Despite setbacks, you rise to the occasion and never settle. • You deliver results • What Makes Working at Sezzle Awesome? • At Sezzle, we are more than just brilliant engineers, passionate data enthusiasts, out-of-the-box thinkers, and determined innovators; we are skilled musicians, yogis, cyclists, chefs, golfers, dog-lovers, and rock-climbers. We believe in surrounding ourselves with not only the best and the brightest individuals, but those that are unique and purpose-driven in all that they do. Our culture is not defined by a certain set of perks designed to give the illusion of the traditional startup culture, but rather, it is the visible example living in every employee that we hire.