SENIOR SOFTWARE ENGINEER - Embedded C

Happiest Minds Technologies; Bengaluru; On-site; INR 900,000 - 1,500,000; Full time

Job summary

Happiest Minds Technologies in Bengaluru, India is seeking experienced professionals for L2/L3 networking protocol development. The role focuses on design, development, debugging, and optimization of networking features across Cisco IOS, IOS-XE, NX-OS, and open systems like SONiC.

You will lead implementation in C on Linux, mentor junior engineers, collaborate with QA, and contribute to design reviews. The position requires 3–5 years in L2/L3 protocol work and strong Linux/C expertise.

Qualifications

• 3–5 years of hands-on experience in L2/L3 protocol development.

Responsibilities

• Design and development of L2/L3 network protocol features and enhancements.

Skills

L2/L3 protocol development

C programming

Linux environments

Multithreading

Socket programming

Memory management

Data structures

Network protocols

Tools

Cisco IOS

IOS-XE

NX-OS

SONiC NOS

P4

CI/CD pipelines

DevOps tools

Job description

We are seeking experienced professionals to take on the role focused on L2/L3 networking protocol development. The ideal candidate will have deep expertise in C programming, Linux environments, and protocol-level software design. This role involves leading design, development, debugging, and optimization of networking features across multiple platforms including Cisco IOS, IOS-XE, NX-OS, and open networking systems like SONiC.

Key Responsibilities

• Design and development of L2/L3 network protocol features and enhancements.
• Own and drive the implementation of new networking functionalities in C on Linux platforms. (C, Linux kernels are mandatory)
• Debug and fix issues in existing protocol implementations and improve software stability.
• Architect and optimize multi-threaded and socket-based communication systems.
• Work closely with cross-functional teams to integrate features into existing systems (Cisco OS and SONiC NOS).
• Provide technical mentorship to junior engineers and contribute to design/code reviews.
• Collaborate with QA and support teams for validation, testing, and issue resolution.
• Document software design, architecture, and troubleshooting guides.

Skills and Qualifications:

• 3 to 5 years of hands-on experience in L2/L3 protocol development.
• Strong programming skills in C, OS within Linux environments(Mandatory)
• Experience with networking protocols such as:
• Layer 2: VLAN, STP, RSTP, MSTP, VXLAN, LLDP, LAG
• Layer 3: BGP, OSPF, RIP, EIGRP, IGMP, PIM, MPLS, GRE, IPSec
• Proficiency in Multi-threading and Socket Programming.
• Excellent knowledge of data structures and memory management.
• Experience with Cisco operating systems ? IOS, IOS-XE, NX-OS.Strong understanding of software architecture and modular design for networking systems.
• Experience with SONiC Network Operating System (NOS).
• Knowledge of programmable packet pipelines (e.g., P4).
• Familiarity with DevOps tools and CI/CD pipelines for network software.
• Exposure to open networking and white-box switch ecosystems.