Senior Backend Developer, Global Authentication Service

Bengaluru

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Project overview

You will contribute to the development of a global authentication and authorisation service used across multiple regions and client facing applications. The project focuses on delivering secure backend capabilities, identity workflows, and large scale access management.

Position overview

We are looking for a specialist who will support the development of a global authentication and authorisation service used across multiple regions and client facing applications.

Standard India office hours, with some flexibility to join some early hours coordinated meetings during Sydney Time zone (AEDT).

Technology stack

C Sharp, .NET Core, identity and access management platforms such as Okta, Auth0 or Keycloak, OAuth 2.0, OpenID Connect, SAML, SQL, NoSQL, synchronous APIs, asynchronous events

Responsibilities

Design and develop backend services that support global authentication and authorisation workflows
Build secure APIs that manage identity lifecycles, roles, permissions, and claims based access control
Integrate authentication services with microservices platforms using synchronous and asynchronous communication
Work with identity and access management systems such as Okta, Auth0, or Keycloak
Apply secure design practices including encryption, secrets management, and secure configuration in cloud environments
Maintain data models for identity, configuration, and auditing in SQL and NoSQL databases
Support multi region and multi tenant deployment considerations for authentication services
Collaborate with teams to ensure consistent identity standards and service integration

Requirements

Hands on experience with C Sharp and .NET Core for backend service development
Experience designing and implementing authentication and authorisation solutions at scale
Understanding of OAuth 2.0, OpenID Connect, SAML, token based security, and federation patterns
Experience with identity and access management platforms such as Okta, Auth0, or Keycloak
Experience building secure APIs and implementing claims based access control
Familiarity with SQL and NoSQL databases for identity related data
Awareness of security practices including encryption, secrets handling, and key rotation
Experience integrating authentication services with microservices architectures
Ability to communicate clearly in English

Nice to have

Unit testing experience
Strong security mindset in backend development
Familiarity with travel ecosystem concepts
Experience collaborating across distributed teams and time zones

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