Android Telephony Engineer: 5G, eSIM, Voice/Data

Amazon; Sunnyvale (CA); On-site; USD 165,000 - 224,000; Full time

Benefits offered by this job

Health insurance

401(k) matching

Paid time off

Parental leave

Job summary

Amazon Lab126 is seeking a skilled software engineer to design and optimize the cellular telephony framework for Android-based devices, delivering reliable voice, data, messaging, and connectivity experiences.

You will work on core telephony components, including calling, data connectivity, and advanced features like Wi‑Fi calling and eSIM provisioning, while collaborating with modem/baseband, OS platform, QA, and cloud services teams.

Qualifications

• 3+ years of non-internship professional software development experience.
• Bachelor's degree or equivalent.
• 2+ years of contributing to new and current systems architecture and design (architecture, design patterns, reliability and scaling).
• Experience programming with Java, C++, or C# including object-oriented design.

Responsibilities

• Design, develop, and optimize the cellular telephony framework and services layer on Android-based devices.
• Architect and implement core telephony framework components including calling, data connectivity, messaging, and features such as Wi-Fi calling, eSIM provisioning, and 5G integration.
• Optimize telephony stack performance for call setup latency, network registration, and power efficiency across carrier networks and devices.
• Partner with product management to translate customer goals into technical designs and implementation.
• Collaborate cross-functionally with modem/baseband, OS platform, QA/certification, and cloud services teams to deliver telephony features end-to-end.
• Lead and participate in design reviews and drive complex architectural decisions.

Skills

Software development

Java/C++/C#

OO design

Android development

Education

Bachelor's degree or equivalent

Tools

Git

CI/CD processes

Job description

Amazon Lab126 is seeking a skilled software engineer to design and optimize the cellular telephony framework for Android-based devices, delivering reliable voice, data, messaging, and connectivity experiences.

You will work on core telephony components, including calling, data connectivity, and advanced features like Wi‑Fi calling and eSIM provisioning, while collaborating with modem/baseband, OS platform, QA, and cloud services teams.