Principal Engineer – Data Infrastructure

Sezzle

Principal Engineer leading Sezzle's data infrastructure and database ownership. Overseeing MySQL and Redshift performance while leveraging AWS tools.

Posted 7/17/2026full-timeRemote • 🇺🇸 United StatesLead💰 $300,000 - $400,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive expertise in database management, data warehousing, and performance optimization, with a strong focus on MySQL, Postgres, and AWS Redshift. Proven ability to lead data infrastructure evolution and implement effective ETL processes while collaborating with cross-functional teams.

Highest-signal resume keywords

MySQL ExpertisePostgres ExpertiseAWS Redshift ProficiencySQL Advanced ProficiencyETL/ELT Frameworks Experience

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Database ManagementPerformance TuningData ModelingWorkload ManagementQuery OptimizationData ReplicationComplex ETLTable DesignDistributed SystemsCost Management

Soft Skills

Excellent CommunicationCollaborationDocumentation Skills

Tools & Technologies

DBTAWS DMSClaudeData Warehousing Tools

Industry Keywords

Data EngineeringSREDBAData InfrastructureData Systems

Tech Stack

Tools & technologies

Amazon RedshiftAWSDistributed SystemsETLMySQLPostgresSQL

About the role

Key responsibilities & impact

End to end ownership of our database and data warehousing infrastructure, its KPIs and its 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.

Requirements

What you’ll need

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.
Demonstrated experience working with Claude or equivalent large language model tools is required; candidates must be comfortable leveraging AI to enhance productivity, research, and communication.

Benefits

Comp & perks

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