Senior Software Engineer – Layer1, C++

Arista Networks

. Work on software managing the physical Layer1 of networking products .

Posted 9/16/2026full-timeRemote • IrelandSenior💰 $140,000 - $200,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in developing and managing software for Layer1 networking products, with a strong focus on C, C++, and Python programming. Capable of providing technical leadership and mentoring while collaborating with cross-functional teams to deliver robust solutions.

Highest-signal resume keywords

C ProgrammingC++ ProgrammingPython ProgrammingLayer1 NetworkingTechnical Leadership

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Software DevelopmentControl SoftwareAutomated TestingSoftware Engineering PrinciplesTroubleshootingDigital Communication TechnologiesIP NetworkingDistributed SystemsLow Level Hardware InteractionFeature Development

Soft Skills

Problem SolvingTeam CollaborationMentoring

Tools & Technologies

UNIXLinux

Industry Keywords

Physical LayerConnectivityInstrumentationTelemetryOpticsStandards Development

Tech Stack

Tools & technologies

Distributed SystemsLinuxPythonUnixC++

About the role

Key responsibilities & impact

Work on software managing the physical Layer1 of networking products
Write control software for connectivity ranging from 1GBASE-T connectors to 1.6T long-reach optics
Develop software across forwarding engines, connectors, and interface chips/gearboxes
Build instrumentation and telemetry tools for monitoring and troubleshooting 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 Layer1 components to market
Design software control interfaces for Layer1 components with hardware engineers
Provide technical leadership across features, projects, and tools
Analyze and fix customer-network and system-test problems
Mentor new and junior engineers

Requirements

What you’ll need

BS Computer Science, Electrical Engineering, or Computer Engineering + 8 years experience, or MS in one of these fields + 6 years experience, or Ph.D. in one of these fields + 3 years experience, or equivalent work experience
Expert knowledge of C or C++ and Python
Knowledge of UNIX or Linux
Knowledge of digital communication technologies like 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 a solution and implement features independently
Ability to work in small teams

Benefits

Comp & perks

Employees can work remotely
Discretionary Arista bonuses and equity may be available for certain roles
US-based employees are entitled to medical, dental, vision, wellbeing, tax savings and income protection benefits
Working hours agreed in advance with the team manager