Job Title: SDE - Java Backend Engineer Authentication & SSO

Experience: 1 - 5 Years

Location: Hyderabad(Preferred Hyderabad based Candidates)

Immediate Joiners Preferred.

About the Role

We are looking for a Java Backend Engineer with 1 - 5 years of experience and strong knowledge of authentication, Single Sign-On (SSO), identity protocols, AWS, and Data Structures & Algorithms (DSA).

The ideal candidate will have a solid understanding of authentication and authorization workflows and hands-on exposure to protocols such as OAuth 2.0, OpenID Connect (OIDC), SSO Federation, JWT/JWKS validation, and PKCE. The role involves building secure, scalable backend services and working closely with engineering and security teams.

Key Responsibilities

- Design, develop, and maintain scalable backend applications using Java.
- Implement and integrate secure authentication and authorization mechanisms.
- Develop and support Single Sign-On (SSO) solutions across applications and services.
- Work with identity and authentication protocols including OAuth 2.0 and OpenID Connect (OIDC).
- Implement and troubleshoot SSO Federation and identity provider integrations.
- Work with JWT/JWKS validation, token verification, claims, signing algorithms, and key rotation concepts.
- Implement and understand PKCE flows for secure authentication.
- Integrate authentication services with cloud-based applications and AWS infrastructure.
- Analyze authentication and login flows, troubleshoot security issues, and identify root causes.
- Develop secure, clean, maintainable, and testable Java code.
- Apply strong Data Structures & Algorithms (DSA) and problem-solving skills to backend engineering challenges.
- Collaborate with security, product, DevOps, and engineering teams to deliver reliable solutions.
- Participate in code reviews, technical design discussions, testing, and production support.

Required Skills

Java & Backend Development





- 1 - 5 years of professional experience in Java development.
- Strong understanding of Core Java, OOP, Collections, Exception Handling, and multithreading/concurrency.
- Good knowledge of backend development and RESTful APIs.
- Strong understanding of Data Structures & Algorithms (DSA).
- Experience writing clean, scalable, and maintainable code.

Authentication & SSO

Strong understanding of the authentication and Single Sign-On login process, including:

- Authentication vs. authorization concepts
- OAuth 2.0
- OpenID Connect (OIDC)
- SSO Federation
- JWT and JWKS validation
- PKCE
- Access tokens, ID tokens, refresh tokens, and claims
- Token validation and signature verification
- Identity Provider (IdP) and Service Provider (SP) concepts
- Authentication flows and session/token management
- Secure handling of credentials, tokens, and user identity information

AWS

- Hands-on experience or good working knowledge of AWS services.
- Understanding of deploying and running backend applications on AWS.
- Exposure to services such as EC2, S3, IAM, Lambda, API Gateway, CloudWatch, or equivalent AWS services is desirable.

Valuable to Have

- Experience with identity platforms such as Okta, Auth0, Microsoft Entra ID/Azure AD, Keycloak, or similar.
- Knowledge of Spring Boot and Spring Security.
- Experience with microservices and REST APIs.
- Understanding of security best practices and common application security vulnerabilities.
- Exposure to Docker, CI/CD, Kubernetes, or cloud-native development.
- Familiarity with SAML and other federation protocols.
- Experience troubleshooting authentication issues in distributed systems.

Key Competencies

- Strong understanding of authentication and identity management
- Good knowledge of Java and backend engineering
- Strong DSA and problem-solving skills
- Security-focused mindset
- Ability to understand and troubleshoot complex login/authentication flows
- Good communication and collaboration skills
- Ability to work effectively in a fast-paced engineering environment

📌 Software Development Engineer (Hyderabad)
🏢 Bct Consulting
📍 Hyderabad