This position requires office presence of a minimum of 5 days per week and is only located in the location(s) posted. No relocation is offered.

Join a strategic initiative to transform our broadband device software development organization. As an Embedded Linux Software Engineer, Principal - you will contribute to the development of high-quality, innovative software for the next generation of broadband gateways serving 15 million+ customers. You will leverage your expertise to drive technical excellence, integrate AI solutions, and champion a quality-first approach to software delivery. Your individual contributions will help differentiate our software in a highly competitive market and play a vital role in shaping industry-leading products. 

What You'll Do:

Embedded Linux Software development for Broadband Customer Premise Equipment (CPE).  

• Migrating CPE from a proprietary software platform to an Opensource Prplware (OpenWRT) based software solution. 
• Design, Develop and Document existing systems to improve reliability and develop new innovative features. 
• Software development for new Hardware with cutting-edge features and technology. 
• Manage ongoing software architectural updates that include new Prplware, OpenWRT and Linux Kernel versions. 
• Development in an Agile environment with up to 5 releases a year. 
• Develop automated testing to validate new features.  
• Develop applications to run in a Lifecycle Management (LCM) container on the Broadband CPE.  

What You'll Need:

• Knowledge of Linux operating system, process execution, multi-process environments, inter-process communication.  Good understanding of networking fundamentals, UDP/TCP basics, packet flow through the Linux packet processing stack. Understanding of Linux firewall and routing concepts.  Knowledge of common networking protocols: DHCP, DNS.  Familiarity with tcpdump and network protocol analysis. 
• Knowlege of wifi concepts, AP and station roles, association and authentication of wifi stations, configuration of ssids. 
• Familiarity with the gcc toolchain and debugging stack traces.  Familiarity with syslog and logging concepts. 
• Experience in an Agile development environment. 
• Extensive experience with C programming. Familiarity with standard C libraries, and other common libraries like libssl, libcrypto, libcurl.  Knowledge of prplware libraries.  Familiarity with the OpenWrt build system, and its IPC mechanism ubus, overlayfs, and its config system UCI. 
• 7+ years of experience in embedded software development.  
• Track record of creating innovative solutions and new applications through the design, development, and coding for innovative Consumer and business applications.   

Our Principal Software Engineering jobs earn between $174,100.00 - $261,100.00 USD Annual. Not to mention all the other amazing rewards that working at AT&T offers. Individual starting salary within this range may depend on geography, experience, expertise, and education/training.

Joining our team comes with amazing perks and benefits:

• Medical/Dental/Vision coverage
• 401(k) plan
• Tuition reimbursement program
• Paid Time Off and Holidays (based on date of hire, at least 23 days of vacation each year and 9 company-designated holidays)
• Paid Parental Leave
• Paid Caregiver Leave
• Additional sick leave beyond what state and local law require may be available but is unprotected
• Adoption Reimbursement
• Disability Benefits (short term and long term)
• Life and Accidental Death Insurance
• Supplemental benefit programs: critical illness/accident hospital indemnity/group legal
• Employee Assistance Programs (EAP)
• Extensive employee wellness programs
• Employee discounts up to 50% off on eligible AT&T mobility plans and accessories, AT&T internet (and fiber where available) and AT&T phone

Weekly Hours:

40

Time Type:

Regular

Location:

Dallas, Texas, USA:WA:Bothell / 20309 North Creek Pkwy - Adm (bothell 7):20309 N Creek Pkwy @ Bldg L

Salary Range:

$174,100.00 - $261,100.00

It is the policy of AT&T to provide equal employment opportunity (EEO) to all persons regardless of age, color, national origin, citizenship status, physical or mental disability, race, religion, creed, gender, sex, sexual orientation, gender identity and/or expression, genetic information, marital status, status with regard to public assistance, veteran status, or any other characteristic protected by federal, state or local law. In addition, AT&T will provide reasonable accommodations for qualified individuals with disabilities. AT&T is a fair chance employer and does not initiate a background check until an offer is made.

Job ID R-113891 Date posted 07/06/2026