Senior Backend Developer (Java + Spring Expert)

About the Role

Java Backend Developer with strong Spring Framework and authentication protocol expertise

Key Responsibilities

• Integrate 

  OIDC server

   into an existing Spring-based SSO system (currently supports SAML).
• Implement 

  authentication flows

   using OIDC, SAML, OAuth2, and FIDO2 in coordination with existing federation mechanisms.
• Collaborate with mobile and desktop teams to integrate core authentication features into their respective clients.
• Design and develop RESTful APIs for seamless interoperability across web, desktop, and mobile.
• Work on enhancing token-based authentication systems (TOTP/HOTP).
• Maintain and scale 

  enterprise-grade authentication backend

   systems.
• Create secure middleware for Windows login federation (used by our desktop app).

Skills & Qualifications

• 5+ years of hands-on experience in Java (Enterprise Level)

  .
• Expertise in 

  Spring Framework

   (Spring Boot, Spring Security, Spring MVC).
• Strong knowledge of 

  authentication protocols

  :
• OIDC (OpenID Connect)
• SAML
• OAuth 2.0
• FIDO2
• TOTP/HOTP
• Deep understanding of 

  identity federation and SSO platforms

  .
• Solid grasp of 

  REST API design

  , 

  microservices architecture

  , and 

  secure data handling

  .
• Experience with relational databases such as 

  PostgreSQL

   or 

  MySQL

  .
• Familiarity with version control systems (e.g., Git) and CI/CD tools.

Bonus Skills (Nice to Have)

• Exposure to 

  Passkey

   (WebAuthn) implementations.
• Experience working with 

  Windows services

   or 

  Windows credential providers

  .
• Experience in secure session management and MFA.

Why Join Us?

• Work on a mission-critical security platform used by enterprise clients.
• Contribute to high-impact projects with real-world applications in cybersecurity and identity management.
• Flexible work hours and a remote-first culture.
• Opportunity to work with cross-functional teams including mobile and desktop developers.