Principal/Senior Software Engineer
1 week ago
Responsibilities :1. Lead the design and development of Voice Services across NB-IOT.2. Build signalling Component of Voice Gateway to setup Voice Signaling and Media Sessions3. Define CSFB-SS7-based Registration(I1 protocol) with 3G Voice Call-Flow for Integration with NTN carrier and 3GPP IMS Core network.4. Implementation of I1 protocol signalling and integration with PGW5. Build Voice Gateway Server that includes implementing CSFB-I1 and SIP/SDP interworking function6. Integration of 3rd party SIP/SDP protocol stack7. Focused approach in optimizing Voice service for low bandwidth networks.8. Implement Scalable Voice Gateway Server to support thousands of SIP sessions and interworking with MNO Session Border Controller (SBS) and IMS network.9. Defining Component Test Scenarios and Test Cases, Component testing and Unit testing, Code Coverage and API test automation10. Build and Deployment using Jira, Jenkin, GCR/GKE11. Implement and enforce security best practices in both software development and deployment12. Work with platform engineering teams to quickly iterate on and deploy application components.13. Work closely with QA in defining component test scenarios, test cases, and perform component testing, performance testing and functional test automation14. Self Managing Engineer and work with other cross-functional teams to streamline processes and enhance collaboration on design specifications to iterate on feature development15. Establish a disciplined development and deployment process so that software ships on time and at a very high level of quality. Validate and deliver high quality code using tests.Requirements :1. 8+ years experience in professional software development using OOP and distributed microservices.2. Masters or Bachelor's degree in Computer Science, Engineering or related field.3. Expert knowledge in CSFB, I1, SIP Signaling and 3GPP IMS standards for SIP Registration and telephony Services.4. Well verse with using SIP stack for building UE proxy client and B2B server5. Prior working experience in VoIMS and implementing solutions around SIP protocol and IMS/SIP network.6. Experience in using open source tools such as SIPP, Freewitch for setting up test environment for development activities7. Programming capabilities with experience in C/C++ or Go/Java Language8. Excellent knowledge and implementation skills of data schema design and developing efficient SQL queries. Strong experience building services using SQL DB.9. Working knowledge of stream processing systems and message queues like GCP pub-sub, Kafka.10. Experienced in REST API design and protocol design across different network layers.11. Experience in building stable and scalable server components/features preferred.12. Distributed systems knowledge for massive horizontal scaling.13. Working experience on using kubernetes, docker, jenkins pipeline and GCP14. Strong understanding of Code quality and performance metrics15. Highly collaborative, with excellent communication skills.16. Hands-on experience with CI/CD tools and frameworks (e.g. JMeter, Postman, Jenkin, Grafana, Prometheus, Unit Test frameworks)What we offer:- Unique opportunity to participate in developing and running world's first software-defined direct-to-device satellite network and service- Access to world-class team and talent across tech domains: software, hardware, chipsets, telecom, satellite and network virtualisation- Open, transparent, inclusive culture that blends the Silicon Valley, Nordic and South Asia characteristic (ref:hirist.tech)
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