Kotlin Developer API & Security Specialist

OptraHEALTH is a leader in delivering innovative, technology-driven solutions across industries. We specialize in building intelligent, data-centric applications that empower organizations to unlock the value of their data and drive business impact. Leveraging cutting-edge technologies, cloud platforms, and scalable architectures, we create high-quality solutions that are built to perform and adapt. As a fast-paced, growth-oriented company, we foster a collaborative environment where creativity, problem-solving, and ownership are encouraged giving our team the opportunity to shape and deliver transformative products from the ground up. Location: Pune Experience: 4-6 years Industry: Banking / Finance (preferred) Focus: Building APIs, implementing authentication/authorization, integrating with SAP & finance systems. Skills Weight: Spring Security (OAuth2, SAML2, LDAP, JWT), OpenAPI, gRPC, Protocol Buffers, API design. We are seeking a Kotlin Developer (API & Security Specialist) to design and implement secure, high-performance backend APIs for banking/finance applications. The role focuses on secure authentication/authorization flows, API integration with SAP systems, and robust inter-service communication using gRPC and Protocol Buffers. Key Responsibilities: - Design and develop REST and gRPC APIs using Kotlin, Spring Boot, and Protocol Buffers. - Implement authentication/authorization using Spring Security (OAuth2, SAML2, LDAP, JWT). - Create and maintain API documentation with OpenAPI 3.0 & SpringDoc. - Integrate with SAP systems and other financial applications using REST, OData, and JSON/XML protocols. - Collaborate with backend and DevOps teams for secure deployments. - Perform code reviews, troubleshoot issues, and ensure security compliance. Required Skills: - Strong Kotlin & Spring Boot experience. - Expertise in Spring Security (OAuth2, SAML2, LDAP, JWT). - Experience with gRPC, Protocol Buffers. - API integration with SAP/Finance systems. - Familiarity with Docker and cloud environments (AWS/GCP).,