Sr. Software Dev Engineer

Amazon • Sunnyvale, CA

2d

About The Position

Amazon Lab126 is an inventive research and development company that designs and
engineers high-profile consumer electronics. Lab126 began in 2004 as a
subsidiary of Amazon.com, Inc., originally creating the best-selling Kindle
family of products. Since then, we have produced popular devices like Fire
tablets, Fire TV, Amazon Echo and Amazon Echo Show. The Amazon Devices group
delivers delightfully unique Amazon experiences, giving customers instant access
to everything, digital or physical.

We own the cellular services on various devices, building the software that
connects people through voice, data, and messaging every day. We work closely
with OS platform teams, QA/certification, cloud services, and product management
to deliver reliable connectivity experiences across diverse carrier networks and
device configurations. We take ownership of the performance and reliability that
users depend on for their most fundamental connectivity experiences.

Requirements

• 5+ years of non-internship professional software development experience
• 5+ years of programming with at least one software programming language experience
• 5+ years of leading design or architecture (design patterns, reliability and scaling) of new and existing systems experience
• Experience as a mentor, tech lead or leading an engineering team
• Bachelor's degree
• 3+ years of Android development experience

Nice To Haves

• Experience with full software development life cycle, including coding standards, code reviews, source control management, build processes, testing, and operations
• Hands-on experience developing telephony and cellular services software, with deep understanding of cellular stacks (e.g., IMS, MMTel, RCS), device connectivity features, and data services.

Responsibilities

• Design, develop, and optimize the cellular telephony framework and services layer on Android-based devices, delivering reliable voice, data, messaging, and connectivity experiences. This role owns the application processor side of the mobile telephony stack, integrating carrier requirements, platform telephony APIs, and cellular service features across various devices.
• Architect and implement core telephony framework components including calling, data connectivity, messaging, and advanced 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 diverse carrier networks and device configurations.
• Partner with product management to translate customer experience goals into technical designs and implementation.
• Collaborate cross-functionally with modem/baseband, OS platform, QA/certification, and cloud services teams to deliver differentiated telephony features end-to-end.
• Lead and participate in design reviews, taking ownership of critical architectural decisions and driving resolution of complex technical issues.

Benefits

• health insurance (medical, dental, vision, prescription, Basic Life & AD&D insurance and option for Supplemental life plans, EAP, Mental Health Support, Medical Advice Line, Flexible Spending Accounts, Adoption and Surrogacy Reimbursement coverage)
• 401(k) matching
• paid time off
• parental leave

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level