We are seeking a talented and motivated best-in-class Principal Software Engineer to own and lead the evolution of authentication and authorization at Sezzle. Sezzle is investing in the next generation of its authentication and authorization platform, centered on a purpose-built API auth gateway and a clean set of identity and access management services. As the Principal Software Engineer leading this effort, you will own the technical vision, architecture, and migration strategy for this transformation
~ In this backend focused role, you will work closely with stakeholders from Product, Security, Support and the business
~ You'll also partner with engineering teams across the organization to deliver auth capabilities that are safe, incremental to adopt, and invisible to customers
~ Your work will generally focus on foundational platform capabilities, security-critical paths, and performance at the edge
~ Own the technical vision and roadmap for Sezzle's authentication and authorization platform, including a dedicated API auth gateway and supporting identity services
~ Architect,



design, and build scalable, highly-available auth services and gateway components primarily in Golang, leveraging AWS, RDS (MySQL/Postgres), and modern distributed patterns
~ Drive consistency and scalability across a distributed microservices architecture while maintaining the performance, reliability, and latency budgets expected of an edge gateway
~ Partner with Security and Compliance to ensure the new platform meets fintech-grade security and regulatory requirements, and champion secure-by-default patterns across engineering
~ Establish and evolve engineering best practices for observability, security, and CI/CD across teams, with particular rigor on the auth-critical path
~ Remote Friendly Company
~ Deployed significant changes to a production application in the past 30 days12+ years of professional software engineering experience, including significant backend experienceDeep, hands-o

📌 Principal Software Engineer (España)
🏢 Sezzle
📍 España