Jobs at Sezzle

Lead design, development, and deployment of scalable ML models and MLOps infrastructure on AWS (SageMaker). Build recommendation, fraud, and credit risk systems; implement monitoring, observability, CI/CD, and production support; mentor engineers and collaborate with product teams to deliver AI-driven features.

Design, build, and own AI-powered full-stack platforms and features from discovery through production. Embed AI into products and workflows, ensure reliability and security, support incidents, and mentor teammates.

As a Senior Site Reliability Engineer, you will design and implement scalable infrastructure solutions, enhance reliability and performance, and lead AI enablement efforts within the team.

Lead backend development and ownership of acquiring and payment-processing systems. Build fault-tolerant Go services for authorization, settlement, reconciliation, refunds, and disputes. Integrate with processors/gateways, operate within PCI DSS scope, instrument payment health, use LLM tools like Claude, and mentor engineers while driving production-ready, auditable money-movement flows.

As a Principal Engineer for Data Infrastructure, you'll oversee our databases and data warehousing, optimize performance, and lead technology integrations to enhance data processing capabilities.

Senior backend-focused engineer responsible for designing and delivering features in Go and React, building scalable distributed architectures, mentoring teammates, coordinating with product and business stakeholders, instrumenting production systems, and leading small teams to ship high-quality APIs and services.