Job Summary
We are seeking a highly specialized embedded systems expert to spearhead the development of next-generation broadband gateway firmware within the RDK-B (Reference Design Kit for Broadband) framework. This role sits at the confluence of embedded networking, distributed cloud messaging, and security orchestration-targeting ultra-resilient firmware stacks for DOCSIS, FTTH, and xDSL broadband CPEs. The ideal candidate brings an uncommon blend of low-level Linux expertise, data-path optimization, control plane orchestration, and extensive experience in protocol interoperability across IPv4/IPv6, hybrid topologies, and TR-069/TR-369 ecosystems.Job Description
Key Responsibilities:
- Software Engineer and evolve highly modular, scalable RDKB firmware components across L2-L7 network stack layers for multi-access gateways (DOCSIS, GPON, LTE/5G).
- Integration of emerging cloud-native messaging protocols (e.g., MQTT 5.0, gRPC, CBOR over CoAP) into constrained embedded environments using efficient serialization methods (e.g., Protobuf, Avro).
- Engineer advanced routing, NAT, and encapsulation techniques (MAP-T, DS-Lite, 6RD) optimized for both performance and compliance with industry standards (BBF TR-181, TR-369).
- Design low-latency diagnostic subsystems for WAN-LAN telemetry, cross-layer fault correlation.
- Implement dynamic service chaining and policy-driven firewall orchestration via nftables/IPSets across isolated containerized subsystems (LXC/Docker on embedded targets).
- Contribute directly to the upstream RDK open-source community and represent the organization in broadband working groups (e.g., CableLabs, BBF).
- Collaborate with silicon vendors, SoC BSP teams, and ODM partners to accelerate bring-up cycles and ensure SoC-aware optimization of firmware modules.
- Code audits, fuzz testing, and formal verification of control path security elements including TLS handshake logic, secure boot, and zero-trust provisioning.
Required Qualifications:
- Bachelor's or master's in computer engineering, Embedded Systems, or related discipline.
- 7+ years of hands-on experience developing production-grade firmware in broadband or telco-grade embedded systems.
- Deep mastery of C/C++, multithreading, and IPC/RPC mechanisms (POSIX, D-Bus, JSON-RPC).
- Expert-level understanding of Linux kernel internals, driver subsystems, netfilter/conntrack, and containerization frameworks (LXC/OCI).
- Demonstrated proficiency in:
- Network topology modeling: bridging, VLAN tagging, multicast routing (IGMP/MLD proxies).
- IPv6-first deployments with fallback to NAT64/464XLAT scenarios.
- QoS shaping and traffic classification using tc/cgroups. - Experience deploying TR-069/USP/WebPA agents in large-scale, cloud-controlled CPE fleets.
- Proven expertise with telemetry streaming (OpenTelemetry, JSON-over-MQTT), network analytics, and real-time debugging using gdb, valgrind, and custom logging frameworks.
- Contributions to open-source projects or standards bodies (RDK-B, OpenWRT, IETF) highly desirable.
- Strong system-level design acumen and ability to own features from concept to upstream delivery.
Nice to Have / Bonus Skills:
- Familiarity with software-defined WAN (SD-WAN), mesh networking, or service orchestration via TR-369/WebPA.
- Knowledge of AI/ML-assisted anomaly detection on embedded telemetry.
Disclaimer:
- This information has been designed to indicate the general nature and level of work performed by employees in this role. It is not designed to contain or be interpreted as a comprehensive inventory of all duties, responsibilities and qualifications.
Comcast is proud to be an equal opportunity workplace. We will consider all qualified applicants for employment without regard to race, color, religion, age, sex, sexual orientation, gender identity, national origin, disability, veteran status, genetic information, or any other basis protected by applicable law.
Skills:
C++ Programming Language; Embedded Software; Embedded Firmware Development; Linux Programming; Communication
Salary:
Primary Location Pay Range: $127,914.36 - $191,871.54
Comcast intends to offer the selected candidate base pay within this range, dependent on job-related, non-discriminatory factors such as experience. The application window is 30 days from the date job is posted, unless the number of applicants requires it to close sooner or later.
Base pay is one part of the Total Rewards that Comcast provides to compensate and recognize employees for their work. Most sales positions are eligible for a Commission under the terms of an applicable plan, while most non-sales positions are eligible for a Bonus. Additionally, Comcast provides best-in-class Benefits to eligible employees. We believe that benefits should connect you to the support you need when it matters most, and should help you care for those who matter most. That's why we provide an array of options, expert guidance and always-on tools, that are personalized to meet the needs of your reality - to help support you physically, financially and emotionally through the big milestones and in your everyday life. Please visit the compensation and benefits summary on our careers site for more details.
Education
Bachelor's Degree
While possessing the stated degree is preferred, Comcast also may consider applicants who hold some combination of coursework and experience, or who have extensive related professional experience.
Relevant Work Experience
5-7 Years
