Senior Software Engineer

Zinnia

. Build and evolve authentication flows, including workforce SSO federation (SAML/OIDC), passwordless login for agents and consumers, and machine-to-machine access for service integrations .

Posted 10/30/2026full-timeAlpharetta • United StatesSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building and evolving authentication flows, implementing fine-grained authorization systems, and managing CIAM APIs. Proficient in backend development with TypeScript/Node.js and experienced in cloud services, particularly AWS.

Highest-signal resume keywords

Authentication Flows DevelopmentFine-Grained Authorization DesignCIAM Platform ExperienceBackend Development in TypeScript/Node.jsCloud Services (AWS)

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

OAuth 2.0OpenID ConnectSAMLAPI DesignAutomated TestingCI/CDInfrastructure as CodeEvent-Driven ArchitecturesRBACABAC

Soft Skills

Clear CommunicationCollaboration

Tools & Technologies

Auth0OktaPingOneMongoDBTerraformKafkaConfluentKongDatadog

Industry Keywords

InsuranceFinancial ServicesRegulated IndustryDelegated AccessAgent and Distributor Hierarchies

Tech Stack

Tools & technologies

AWSCloudJavaScriptKafkaMongoDBNode.jsTerraformTypeScript

About the role

Key responsibilities & impact

Build and evolve authentication flows, including workforce SSO federation (SAML/OIDC), passwordless login for agents and consumers, and machine-to-machine access for service integrations
Design and implement fine-grained authorization using RBAC, ABAC, and ReBAC to scope access by carrier, product, distributor, hierarchy, and delegation
Build automated provisioning and lifecycle handling for onboarding, transfers, delegated access, and terminations
Design, document, and maintain CIAM APIs consumed by Zinnia teams
Partner with product teams to onboard applications onto the CIAM integration pattern
Own quality and reliability through automated testing, code review, observability, and on-call participation
Work with security and compliance teams to implement access controls, support audits, and keep access decisions logged and explainable

Requirements

What you’ll need

6+ years of professional software development experience, including building and operating production services in the cloud (AWS preferred)
Hands-on experience implementing OAuth 2.0, OpenID Connect, and SAML, including federation with external identity providers
Experience with a CIAM platform such as Auth0 (preferred), Okta, or PingOne
Experience designing authorization systems beyond basic roles, such as attribute- or relationship-based models
Strong backend skills in TypeScript/Node.js, or a comparable language, with solid fundamentals in API design, testing, and software design
Working knowledge of CI/CD, infrastructure as code, containers, and monitoring and alerting
Clear written and verbal communication, and the ability to work with engineers, product managers, and security partners across a distributed team
Experience working in an Agile/Scrum environment
Experience with OpenFGA, Auth0 FGA, or other Zanzibar-style authorization systems
Experience with event-driven architectures (Kafka/Confluent), API gateways (Kong), MongoDB, Terraform, or Datadog
Background in insurance, financial services, or another regulated industry, especially agent and distributor hierarchies, licensing and appointments, or delegated access

Benefits

Comp & perks

Health/dental insurance
Parental leave
401(k)
Incentive/bonus opportunity
Tuition reimbursement
Excellent career progression
Competitive compensation