Sr Engineer, IAM

Optimum•Town of Oyster Bay, NY

2d•$100,246 - $164,689

About The Position

The Senior IAM Engineer is the technical anchor of the Customer IAM team. Where the IAM Engineer executes established patterns, the Senior Engineer defines them. You own the platform architecture, author the standards that every integration must meet, design the automation that keeps configuration consistent at scale, and provide the technical leadership that enables your teammates and application development teams to move faster and more securely. You operate with broad autonomy, making consequential decisions on Customer Identity Engine configuration, authentication policy design, IaC strategy, and security control architecture — while staying closely partnered with the Manager on roadmap direction and cross-functional relationships. This is a senior individual contributor role with significant influence over the team's technical trajectory.

Requirements

Bachelor’s degree in Computer Science, Information Systems, Cybersecurity, or related field (or equivalent experience)
6+ years of experience in Identity & Access Management, security engineering, or a related technical field
Strong hands-on experience designing and operating CIAM or identity provider platforms at scale
Deep understanding of identity standards and protocols (OAuth 2.0, OpenID Connect, SAML, SCIM, FIDO2/WebAuthn)
Experience leading authentication modernization or large-scale IAM integration initiatives
Proficiency in at least one modern programming language (e.g., JavaScript, Python, Java, Go) for building integrations and automation
Experience implementing Infrastructure-as-Code and CI/CD practices for platform configuration
Proven ability to perform threat modeling, security reviews, and produce clear technical guidance
Experience working with compliance frameworks (e.g., SOX, SOC 2, PCI) and supporting audit activities
Demonstrated ability to mentor engineers and influence technical direction across teams
Applicants must be authorized to work for ANY employer in the U.S.
Please note that at this time, we do not provide visa sponsorship for employment.

Responsibilities

Own the architecture and design of the enterprise customer identity platform, including authentication policy frameworks, authorization models, and identity lifecycle standards
Define and enforce integration standards across identity protocols (OAuth 2.0, OpenID Connect, SAML, SCIM), ensuring consistency and scalability across all applications
Establish governance practices for platform configuration, including naming standards, policy structures, and change management controls
Lead the evaluation and adoption of new identity capabilities and platform features aligned to enterprise security and scalability goals
Lead the technical design of enterprise authentication modernization initiatives, defining integration patterns and reference architectures for application teams
Develop and maintain standardized migration frameworks for onboarding applications to modern CIAM solutions
Define token design, scope models, and session management strategies aligned to security and business requirements
Drive adoption of advanced authentication capabilities, including phishing-resistant and passwordless authentication
Identify and resolve cross-cutting architectural challenges impacting identity integrations across the application portfolio
Own the IAM developer experience, including integration guides, reference architectures, code samples, and reusable implementation patterns
Build and maintain reference implementations demonstrating best practices for authentication flows, token validation, and session management
Design and improve onboarding processes and self-service capabilities for application teams integrating with the CIAM platform
Lead architecture reviews for complex or high-risk integrations, providing clear, standards-based guidance and decision rationale
Foster a community of practice to promote identity best practices and knowledge sharing across engineering teams
Conduct threat modeling for the CIAM platform and application integrations, identifying risks and designing appropriate controls
Define and maintain identity security standards, including authentication assurance levels, MFA requirements, and session policies
Design and tune identity-related monitoring and detection capabilities, including integration with SIEM tools
Lead security design reviews for identity workflows, integrations, and custom services to ensure adherence to best practices
Support vulnerability management by assessing risks, prioritizing remediation, and driving resolution across the platform