ONT Embedded Software Engineer (Junior / Mid-Level) in Hanoi at Zhone Technologies Inc

Zhone Technologies is hiring for multiple Embedded Software Engineer openings across two career levels: Junior and Mid-Level. During the application process, candidates will answer a screening question to indicate which level they intend to apply for. Candidates will be considered for the level that best matches their experience and qualifications.

In this role, you will contribute to the design, development, and maintenance of embedded software for access network equipment, including GPON/XGS-PON ONTs, Wi-Fi Access Points, and residential gateways.

Responsibilities and scope will scale based on experience level.

Key Responsibilities (All Levels):

Software Development & Protocols

• Design and implement embedded software features in C/C++, covering userspace and kernel space.
• Develop and debug packet processing, middleware, and BSP components; support third-party SDK integration.
• Ensure product alignment with global telecom standards: ITU-T (GPON/XGS-PON), BBF (TR-069/369), IEEE 802.3/802.11, MEF, and ETSI; implement IETF RFCs for IPv4/IPv6, DHCP, DNS, and security.
• Implement and optimize Wi-Fi 5/6/7, EasyMesh, VoIP (SIP/MGCP/H.248), IPTV/Multicast (IGMP/MLD), and QoS features for residential gateway applications.

Testing & CI/CD

• Develop and maintain automated test scripts in Python for product verification and regression testing.
• Support and enhance CI/CD pipelines to ensure continuous integration, testing, and delivery.
• Collaborate with QA and hardware teams to validate software in real-world scenarios.

Collaboration & Agile

• Participate in Agile/Scrum ceremonies and collaborate with cross-functional teams (hardware, QA, product management).
• Document software changes, design decisions, and troubleshooting procedures.

This posting covers multiple openings at two career levels. Please review the qualifications for each level below and select the level that best matches your background during the application screening process.

Junior Embedded Software Engineer (1-2 Years)

• Bachelor’s degree in Computer Science, Electrical Engineering, Telecommunications, or a related field.
• 1-2 years of experience, or equivalent internship/project experience, in embedded software development.
• Working knowledge of C/C++, Linux, and basic networking concepts.
• Demonstrated interest in embedded systems, telecom technologies, and structured software development practices.

Mid-Level Embedded Software Engineer (3-5 Years)

• 3-5 years of professional experience in embedded software development, preferably in networking, broadband, or telecom products.
• Strong experience with embedded Linux, C/C++, and networking stacks.
• Hands-on experience with vendor SDKs or platforms such as Broadcom/CMS, Airoha, OpenWrt, MediaTek, or Realtek.
• Proven debugging, documentation, and cross-functional collaboration skills in a product development environment.
• Ability to communicate effectively in technical English with global engineering teams.