Embedded Linux Software Engineer, Principal

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. We are pioneers of making connections and have been ever since Alexander Graham Bell invented the telephone and founded our company. That was nearly 150 years ago, and we haven’t stopped innovating since. At our core, we help bring families, communities, and businesses together with the products and services they need to thrive every day. From the widespread and growing availability of 5G and Fiber to working on things we once only dreamed of—at AT&T, we create connections that change the world.