Embedded Software Engineer, RDKB & Broadband Infrastructure

Make your mark at Comcast -- a Fortune 30 global media and technology company. From the connectivity and platforms we provide, to the content and experiences we create, we reach hundreds of millions of customers, viewers, and guests worldwide. Become part of our award-winning technology team that turns big ideas into cutting-edge products, platforms, and solutions that our customers love. We create space to innovate, and we recognize, reward, and invest in your ideas, while ensuring you can proudly bring your authentic self to the workplace. Join us. You’ll do the best work of your career right here at Comcast. (In most cases, Comcast prefers to have employees on-site collaborating unless the team has been designated as virtual due to the nature of their work. If a position is listed with both office locations and virtual offerings, Comcast may be willing to consider candidates who live greater than 100 miles from the office for the remote option.)

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.

Skills

C++ Programming Language, Communication, Embedded Firmware Development, Embedded Software, Linux Prog