Position Details

Type Full-Time

Experience senior

Exp. Years 5+ years

Education Bachelor's degree

Category System Administration

About this role

Own and improve the cellular telephony framework on Android-based devices, delivering dependable voice, data, messaging, and connectivity. Architect, implement, and optimize core mobile telephony components including Wi-Fi calling, eSIM provisioning, and 5G integration.

Key Responsibilities

Design, develop, and optimize the cellular telephony framework and services layer on Android devices
Architect and implement core telephony framework components (calling, data connectivity, messaging, Wi-Fi calling, eSIM provisioning, 5G integration)
Optimize telephony stack performance for call setup latency, network registration, and power efficiency
Partner with product management to translate customer experience goals into technical designs
Collaborate cross-functionally with modem/baseband, OS platform, QA/certification, and cloud services; lead design reviews and resolve complex issues

Technical Overview

This role builds and optimizes the application processor side of the mobile telephony stack on Android devices. Responsibilities include performance improvements for call setup latency, network registration, and power efficiency, plus deep work integrating telephony APIs with carrier requirements and cellular service features.

Ideal Candidate

The ideal candidate is a senior software development engineer with 5+ years of professional software development experience and 3+ years of Android development experience. They have led architecture/design for reliable, scalable systems and built or optimized cellular telephony stack components (calling, messaging, data connectivity) including features like Wi-Fi calling, eSIM provisioning, and 5G integration. They can partner cross-functionally (modem/baseband, OS platform, QA/certification, and cloud services) and drive technical design reviews to resolve complex issues.

Must-Have Skills

5+ years of non-internship professional software development experience5+ years of programming with at least one software programming language experience5+ years of leading design or architecture (design patternsreliability and scaling) of new and existing systems experienceExperience as a mentortech lead or leading an engineering team3+ years of Android development experienceBachelor's degree

Nice-to-Have Skills

full software development life cycle including coding standardscode reviewssource control managementbuild processestestingand operationshands-on experience developing telephony and cellular services softwaredeep understanding of cellular stacks (IMSMMTelRCS)device connectivity featuresdata services

Tools & Platforms

Android-based devicescloud services

Required Skills

Androidcellular telephony frameworktelephony APIscallingdata connectivitymessagingWi-Fi callingeSIM provisioning5G integrationIMSMMTelRCScall setup latencynetwork registrationpower efficiencydesign patternsreliability and scaling

Hard Skills

Androidcellular telephony frameworktelephony APIscallingdata connectivitymessagingWi-Fi callingeSIM provisioning5G integrationtelephony stack performance optimizationcall setup latencynetwork registrationpower efficiencycellular stacksIMSMMTelRCSeSIM provisioningdesign reviewsdesign patternsreliability and scalingsource control managementcode reviewsbuild processestestingoperations

Soft Skills

mentoringtech lead leadershipteam leadershipcross-functional collaborationpartnering with product managementcommunicationdriving resolution of complex technical issues

Industry & Role

Industry Telecom

Job Function Architect and develop the Android cellular telephony framework and services stack for reliable voice and connectivity.

Role Subtype Platform Engineer

Tech Domains Networking / TCP-IP, Android, Amazon Web Services, Telecom, Networking / TCP-IP, Cloud & Infrastructure

Keywords for Your Resume

Sr. Software Dev EngineerSenior Software Development EngineerSoftware Dev Engineertelephony frameworkcellular telephony frameworkAndroid developmentAndroidtelephony APIscallingdata connectivitymessagingWi-Fi callingeSIM provisioning5G integrationcall setup latencynetwork registrationpower efficiencyIMSMMTelRCSdesign patternsreliability and scalingdesign reviewscode reviewssource control managementbuild processestestingoperations

Deal Breakers

Must have Bachelor's degree, Must have 3+ years of Android development experience, Must have 5+ years of professional software development experience, Must have 5+ years leading design or architecture of new and existing systems experience

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