Senior Backend Engineer - Identity & Access Platform

Software Mind Americas; United States; Remote; USD 140,000 - 180,000; Full time

Job summary

Software Mind is seeking a senior backend engineer to own the identity stack, focusing on authentication, authorization and tenant isolation. You will design, build and operate the User Management API, integrating Okta and Entra ID, and coordinating changes across REST and gRPC surfaces.

Collaboration with frontend and product teams is essential. The role emphasizes security, test coverage with NUnit/Moq, and on-call incident response for a cloud-based service used by multiple tenants.

Qualifications

• Hands-on identity and access management experience; production systems with IAM.
• Experience with OAuth 2.0 and OpenID Connect, PKCE, token validation and refresh flows.
• Designs for multi-tenant RBAC and tenant isolation; user lifecycle provisioning/sync.
• Experience with enterprise identity providers: Okta, Azure AD, Entra ID, Auth0 or Ping.
• SQL Server with EF Core, migrations and performance tuning.
• Designing and versioning REST APIs and gRPC/Protobuf contracts.
• Security mindset: OWASP Top 10, secret handling, least privilege.

Responsibilities

• Design, build and run features in the User Management API (tenant, landscape lifecycle, groups, RBAC).
• Own integrations with Okta and Microsoft Entra ID, including provisioning and lifecycle sync.
• Maintain authentication model and authorization rules; ensure safe upgrades of APIs.
• Version gRPC and REST contracts carefully and coordinate SDK releases.
• Manage secrets using Azure Key Vault and App Configuration.
• Support multi-tenancy, auditing and data integrity across tenants.
• Write NUnit and Moq unit tests, integration tests and smoke suites.
• Collaborate with frontend for sign-in and admin UX; coordinate with product teams.
• Participate in on-call and incident response for a cloud service.

Skills

C# / .NET back-end

IAM experience

OAuth 2.0 / OIDC

RBAC multi-tenant

Tenant isolation

User lifecycle management

SQL Server / EF Core

REST / gRPC APIs

Security best practices

On-call incident response

Tools

Okta

Azure AD

Azure DevOps

EF Core

SQL Server

Protobuf

gRPC

NUnit

Moq

Job description

Software Mind is seeking a senior backend engineer to own the identity stack, focusing on authentication, authorization and tenant isolation. You will design, build and operate the User Management API, integrating Okta and Entra ID, and coordinating changes across REST and gRPC surfaces.

Collaboration with frontend and product teams is essential. The role emphasizes security, test coverage with NUnit/Moq, and on-call incident response for a cloud-based service used by multiple tenants.