We are looking for robust hands-on expertise in AOSP Android Telephony (WAN) across the Framework and Radio Interface Layer (RIL) for 4G/5G devices requires targeting specific core competencies, key architectural layers, and standard debugging practices

This outlines an AOSP Android Telephony Engineer role focusing on 4G and 5G wide area network (WAN) layers, spanning the Android framework down to the Radio Interface Layer (RIL) and modem interactions.

Role Overview

Job Title: Senior AOSP Android Telephony Engineer (WAN/Modem)

Experience Level: 5 to 10+ years

Location: Bangalore

Core Focus: Android Telephony Framework, WAN,RIL, 4G/5G Radio Access Technology (RAT), IMS, and vendor modem integration.

Key Responsibilities

Framework Development: Design and maintain Android Telephony subsystem features in Java/Kotlin (TelephonyRegistry, PhoneSubInfo, SubscriptionController).

RIL Integration: Implement and debug RIL (Radio Interface Layer) C++ daemon, bridging Android framework requests to vendor RIL (libril) and AT commands.

5G/4G Feature Bring-up: Optimize Dual SIM Dual Standby (DSDS), Carrier Aggregation,



SA/NSA 5G handovers, and VoLTE/VoNR IMS configurations.

Debugging & Triage: Analyze radio logs (QXDM, QCAT, Logcat, ril dumps) to resolve call drops, registration failures, and data stalls.

OEM Collaboration: Work with chipset vendors (Qualcomm, MediaTek) to align radio HAL changes with standard AOSP guidelines.

Required Skills & Qualifications

Languages: Java, Kotlin, C++, C.

AOSP Knowledge: Deep understanding of Android Telephony architecture, HIDL/AIDL interfaces for Radio HAL.

Networking Standards: 3GPP specifications for LTE, 5G NR, IMS, SIP, and APN management.

Debugging Tools: Wireshark, QXDM, adb, and modem log analyzers.

Do share your updated profile with the below details ASAP.

Experiences in : AOSP/ Android Telephony Framework /RIL/ modem integration/ WAN debugging :

Full Name

CTC

Exp CTC

Notice Period

Current Location

Relocation to Bangalore

LWD

Offer in Hand

Thanks & Regards,

Rajesh | HR TEAM eMail: [email protected]

📌 AOSP Android Telephony (WAN) across Framework + RIL layers For 4G/5G (Bengaluru)
🏢 Tech Mahindra
📍 Bengaluru