Android Telephony and Radio Interface Layer & Linux Networking Developer

Position Summary

Android Telephony Framework & Radio Interface Layer advanced 5G feature development & commercialization.

Design & develop of advanced inhouse features & commercialize in Flagship & innovative devices.

Role and Responsibilities

• Develop and implement telephony and radio interface layers for Android devices, including GSM/CDMA, LTE, and 5G technologies.
• Optimize network performance, call quality, and data speeds while maintaining low power consumption & latencies.
• Develop & commercialize advanced 5G features (Network Slicing, VoNR, Private Networks, Satellite communication, N3IWF, ATSSS etc)
• Develop & commercialize advanced SIM technologies (eSIM, MEP etc)
• Design & development of new innovation solutions to improve consumer experience on Samsung handsets (Gaming, Video Call, Streaming etc)
• Debug and troubleshoot complex issues related to telephony and radio interfaces, working closely with vendors, carriers, and OEMs.
• Maintain and update existing telephony and radio interface layer codebase, ensuring compatibility with new Android releases and device models.
• Stay informed about industry trends, emerging technologies, and standards related to mobile networks and communication protocols.

Skills and Qualifications

• Bachelor's degree in Computer Science, Electrical Engineering, or related field.
• Strong experience in developing Android telephony and radio interface layers (Vendor RIL), preferably for multiple generations of cellular networks.
• Expertise in Java, C++, and Android SDK, with a focus on telephony and network-related APIs.
• Familiarity with Linux operating systems, shell scripting, and command-line tools.
• Knowledge of wireless communication protocols (e.g., GSM/UMTS/LTE/5G), network architecture
• Excellent problem-solving, debugging, and troubleshooting skills.
• Prior experience working with major mobile carriers, OEMs, or handset manufacturers is a plus.
• Expertise in C/C++ programming, with a deep understanding of Linux kernel internals, particularly networking subsystems and eBPF.
• Familiarity with eBPF toolchains (e.g., LLVM, bpftool, bcc) and related frameworks (e.g., BPFIL, libbpf).
• Expertise in Linux operating systems and associated networking tools (e.g., iptables, iproute2, sysctl).
• Strong understanding of TCP/IP protocol suite, OSI model, routing algorithms, and subnetting concepts.
• Expertise on ePDG (Evolved Packet Data Gateway) protocol (IPSEC), MPTCP etc is added advantage
• Effective communication, collaboration, and interpersonal skills, with the ability to work in a fast-paced, agile environment.
• Passion for technology and a commitment to continuous learning and self-improvement.

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