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Principal Software Engineer - Identity & Access Management

19 minutes ago
Latin America
Full-time
Lead
Security Engineer
Software Development
AWS Datadog Docker Elasticsearch Envoy Git GitLab Go Grafana JWT Kong Kubernetes Microservices MySQL New Relic OAuth OpenID Connect PostgreSQL Prometheus Python React React Native REST API SAML Traefik TypeScript WAF
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Sezzle

Sezzle

Sezzle is a payments company revolutionizing the buy now, pay later experience with interest-free installment plans, empowering consumers and merchants alike.

Diversified Financial Services
251-1K
Founded 2016
View All Jobs 136

Description

  • Own the technical vision, architecture, and roadmap for the authentication and authorization platform.
  • Architect, design, and build scalable auth services and gateway components in Golang on AWS.
  • Lead phased, zero-downtime migrations of auth traffic and functionality with safe rollback plans.
  • Define and evolve authentication and authorization standards across the platform.
  • Drive consistency, performance, reliability, and low latency across a distributed microservices architecture.
  • Partner with Security and Compliance to meet fintech-grade security and regulatory requirements.
  • Establish engineering best practices for observability, security, and CI/CD.
  • Participate in on-call rotation and lead incident response and postmortems for owned services.
  • Mentor engineers and help teammates adopt AI-assisted and secure development practices.
  • Collaborate cross-functionally to translate business goals into technical roadmaps and delivery plans.

Requirements

  • 12+ years of professional software engineering experience, including significant backend experience.
  • A bachelor's degree in Computer Science or a similar technical field is required.
  • Deployed significant changes to a production application within the past 30 days.
  • Deep hands-on experience with authentication and authorization systems, including OAuth2, OpenID Connect, SAML, JWT, sessions, and token lifecycle management.
  • Experience designing, building, or operating an API gateway or auth proxy at scale.
  • Proven track record leading a large-scale service extraction or migration with minimal customer impact.
  • Strong proficiency in Golang and experience building and maintaining RESTful APIs.
  • Expertise with SQL-based RDBMS such as MySQL and PostgreSQL, including schema and query optimization.
  • Solid understanding of distributed systems patterns such as transactional outbox, event-driven architecture, and queues.
  • Demonstrated AI-forward engineering experience using tools such as Claude Code, Codex, Cursor, or custom LLM integrations.
  • Experience with identity platforms such as Keycloak, Auth0, Okta, Ory, or in-house IdPs is preferred.
  • Experience with service mesh and edge technologies such as Envoy, Istio, mTLS, rate limiting, or WAF integration is preferred.
  • Familiarity with threat modeling, secure design review, and common auth attack vectors is preferred.
  • Proficiency with observability tools such as Prometheus, Grafana, Datadog, or New Relic is preferred.
  • Experience with AWS Aurora RDS, Docker, Kubernetes, CI/CD pipelines, or fintech/payments systems is preferred.

Benefits

  • Fully remote role with no relocation or commute required.
  • Competitive monthly compensation of $6,000-$11,000 gross USD, negotiable based on location and experience.
  • Principal-level scope and ownership at a growing fintech company.
  • Opportunity to work on a high-impact, security-critical platform.
  • Use of AI-assisted development as a standard part of the engineering workflow.

Interested in this position?

Apply directly on the company website

Apply Now

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