Senior Software Engineer – Layer1, C++

Arista Networks

. Develop Layer1 control software managing physical-layer connectivity from 1GBASE-T connectors to 1.6T long-reach optics .

Posted 9/24/2026full-timeRemote • IrelandSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in developing Layer1 control software, utilizing C, C++, and Python, while collaborating with hardware teams to ensure quality and functionality of physical-layer connectivity solutions. Possesses strong problem-solving abilities and a solid understanding of software engineering principles to lead projects from definition to deployment.

Highest-signal resume keywords

C ProgrammingC++ ProgrammingPython ProgrammingLayer1 Control Software DevelopmentTechnical Leadership

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

C ProgrammingC++ ProgrammingPython ProgrammingSoftware Engineering PrinciplesDigital Communication TechnologiesIP NetworkingDistributed SystemsLow-Level Hardware InteractionAutomated TestingTelemetry Tools

Soft Skills

Problem-SolvingSoftware TroubleshootingTeam CollaborationMentoring

Tools & Technologies

UNIXLinux

Industry Keywords

Layer1 ConnectivityPhysical LayerOpticsTransceiversPHYs

Tech Stack

Tools & technologies

Distributed SystemsLinuxPythonUnixC++

About the role

Key responsibilities & impact

Develop Layer1 control software managing physical-layer connectivity from 1GBASE-T connectors to 1.6T long-reach optics
Support software across forwarding engines, connectors, and interface chips/gearboxes
Build instrumentation and telemetry tools to monitor and troubleshoot physical link health
Work with Optics teams to define standards for new media and bring them to market
Interface with customers, product management, and hardware engineers to develop Layer1 features
Architect, design, and manage feature development
Develop and maintain features using C, C++, and Python
Review and contribute to functional and design specifications
Build automated tests and test infrastructure
Work with hardware and manufacturing teams to bring new Layer1 components, including PHYs and transceivers, to market
Collaborate with hardware engineers on software control interfaces for Layer1 components
Provide technical leadership across features, projects, and tools
Analyze, mitigate, and fix customer network problems with Customer Support Engineers and customers
Analyze system-test issues and provide fixes
Mentor new and junior engineers
Own projects from definition through deployment and customer interactions, ensuring delivered quality

Requirements

What you’ll need

BS in Computer Science, Electrical Engineering, or Computer Engineering plus 8 years of experience, or MS in one of these fields plus 6 years of experience, or Ph.D. in one of these fields plus 3 years of experience, or equivalent work experience
Expert knowledge of C or C++ and Python
Knowledge of UNIX or Linux
Knowledge of digital communication technologies such as modulation and signal encoding schemes is a plus
Understanding of IP networking and/or distributed systems is a plus
Experience working with low-level hardware components is a plus
Applied understanding of software engineering principles
Strong problem-solving and software troubleshooting skills
Ability to design solutions and implement features independently
Ability to work in small teams

Benefits

Comp & perks

Remote work option
Supportive and growth-oriented culture
Opportunity to switch from Layer1 to other software areas as interests and business needs evolve
Working hours agreed in advance with the team manager