Principal Software Engineer – Identity & Access Management

This is a fully remote position, open to applicants in Chile.

📋 Description

• Take charge of the technical vision and roadmap for Sezzle’s authentication and authorization platform, which includes a dedicated API authentication gateway and associated identity services.

• Design, architect, and construct scalable, highly available authentication services and gateway components primarily utilizing Golang, AWS, RDS, and distributed patterns.

• Lead phased migrations with zero downtime, ensuring rollback and safety mechanisms are in place.

• Set standards for authentication and authorization encompassing OAuth2/OIDC, token strategies, service-to-service authentication, and fine-grained authorization models.

• Promote consistency and scalability across distributed microservices while upholding performance, reliability, and latency budgets.

• Collaborate with Security and Compliance teams to meet fintech-grade security and regulatory standards.

• Implement engineering best practices related to observability, security, and CI/CD.

• Engage in on-call rotation, directing incident responses and conducting postmortems.

• Guide and mentor engineers, fostering a culture of learning, innovation, and operational excellence.

• Work cross-functionally to convert business objectives into technical roadmaps and achieve results.

⛳️ Requirements

• Over 12 years of professional software engineering experience, with a strong emphasis on backend development.

• Recently deployed significant updates to a production application within the last 30 days.

• Extensive hands-on experience with authentication and authorization systems including OAuth2, OpenID Connect, SAML, JWT, session-based authentication, token lifecycle management, RBAC, ABAC, and policy-as-code.

• Background in designing, building, or managing an API gateway or authentication proxy at scale.

• Proven track record of leading large-scale service extraction or migration with zero or minimal customer impact.

• Strong expertise in Golang along with experience in building and maintaining RESTful APIs.

• Proficient in SQL-based RDBMS, such as MySQL and PostgreSQL, with a focus on schema and query performance optimization.

• Familiarity with distributed systems patterns, which may include transactional outbox, event-driven architecture, and queues.

• Capability to present ideas, influence decisions, and spearhead complex technical initiatives across teams.

• Demonstrated current use of AI development tools such as Claude Code, Codex, Cursor, or custom LLM integrations.

• Bachelor’s degree in Computer Science or a related technical field (mandatory).

🏝️ Benefits

• Fully remote work

• No relocation or commuting required

• Competitive compensation

• Principal-level scope and ownership

• Opportunities for career advancement

• AI-assisted development tools and workflows

• Global team and cross-functional collaboration

• Participation in on-call duties for owned services