[Skip to main content](#main-content) [OpenNash Jobs](https://jobs.opennash.com/) [Hiring report](/reports/hiring/) · [All Arista Networks jobs](https://jobs.opennash.com/companies/arista-networks/) · [Search jobs](/search/) Arista Networks · Sydney, NSW, Australia # Senior Software Engineer, EOS - Sydney Sydney, NSW, Australia Full-time Senior individual contributor Software Engineering Listed on Arista Networks’s official careers site. Posted June 16, 2026. Check that it is still open and apply there. [Apply on Arista Networks’s careers site →](https://jobs.smartrecruiters.com/AristaNetworks/744000132336679-senior-software-engineer-eos-sydney) [OpenNash Jobs](https://jobs.opennash.com/) / [Arista Networks](https://jobs.opennash.com/companies/arista-networks/) / Senior Software Engineer, EOS - Sydney ## Job description Who You’ll Work With You’ll be a core member of the Extensible Operating System (EOS) team in Sydney, a fast-paced, high-calibre global team building the software that runs the world's largest data centre networks. Our team is responsible for all aspects of developing and delivering the foundational networking features that run on all of Arista's switching products. You will work with your fellow engineers and members of the marketing team to gather and understand the functional and technical requirements for upcoming projects. You will help write functional specifications, design specifications, test plans, and the code to bring all of these to life. You will also work with customers to triage and fix problems in their networks. Internally, you will develop automated tests for your software, monitor the execution of those tests, and triage and fix problems found by your tests. At Arista, you will own your projects from definition to deployment, making a direct impact on our customers and the quality of everything you deliver. ### What You’ll Do Architect and Develop: Design and develop innovative networking features in C/C++ and Python for Arista's unique, Linux-based EOS. ### Collaborate Work closely with product management, customers, and fellow engineers to define functional requirements and technical designs for new EOS capabilities. ### Own Quality Take full ownership of your work by writing functional specifications, design documents, test plans, and the automated tests needed to ensure robust, high-quality code. ### Lead and Mentor Provide technical leadership, contribute to code reviews, and mentor junior engineers, fostering a culture of high-quality engineering. ### Customer Engagement Work directly with Customer Support Engineers to triage, debug, and resolve complex issues found in customer networks. ## Qualifications ### Required A degree in Computer Science, Computer Engineering, or Electrical Engineering (BSc, MS, or PhD). Strong, demonstrable software development experience in C/C++ and/or Python. Strong understanding of operating systems. Proficiency in systems programming, preferably in a UNIX/Linux environment. A strong interest in computer networking technologies. Applied understanding of software engineering principles. ### Preferred Deep understanding of L2/L3 networking protocols (e.g., BGP, OSPF, IS-IS, Spanning Tree, LACP). Hands-on experience in the design and development of ethernet bridging or routing related software or distributed systems software is desirable. Hands-on experience with enterprise or service provider class Ethernet switch/router system software development, or significant PhD level research in the area of network routing and packet forwarding. Familiarity with infrastructure functions related to distributed systems such as messaging, signalling, databases, and command line interface techniques. ### Competencies Strong analytical and problem-solving skills. Effective communication and collaboration in cross-disciplinary teams. Self-motivated with a strong attention to detail and a commitment to quality. Ability to manage multiple tasks and meet project deadlines. Ability to design a solution and implement features independently. Ability to work in small teams. ## At a glance - Posted by the employer: Jun 16, 2026 - First seen by OpenNash: Jul 10, 2026 - Last checked: Oct 17, 2026 - Listed for: 123 days - Location: Sydney, NSW, Australia - Employment type: Full-time[Apply on Arista Networks’s careers site →](https://jobs.smartrecruiters.com/AristaNetworks/744000132336679-senior-software-engineer-eos-sydney) ## More jobs at Arista Networks ### [Senior Software Engineer, Diagnostics - Sydney](https://jobs.opennash.com/companies/arista-networks/jobs/38bdd88928f3dd75855d/) Sydney, NSW, Australia ### [Site Reliability Engineer (SRE/ DevOps) - Engineering Productivity - Sydney](https://jobs.opennash.com/companies/arista-networks/jobs/0ac99a651abffbf1f2c5/) Sydney, NSW, Australia ### [Software Engineer, EOS (Early-career/Mid-level) - Sydney](https://jobs.opennash.com/companies/arista-networks/jobs/a3e03da1d88f00ace77e/) Sydney, NSW, Australia ### [FPGA Build System Engineer - Engineering Productivity - Sydney](https://jobs.opennash.com/companies/arista-networks/jobs/8780b17cc29fa5df179c/) Sydney, NSW, Australia ### [Hardware Engineer, Sydney](https://jobs.opennash.com/companies/arista-networks/jobs/0cc0a719674d5336cafa/) Sydney, NSW, Australia ## Similar jobs at other companies ### [Commercial & Investment Bank – Rates Trading – Analyst, Sydney](https://jobs.opennash.com/companies/jpmorganchase/jobs/65668ecc2b53636d18c6/) JPMorganChase · Sydney, NSW, Australia ### [Investment Banking - Equity Capital Markets Analyst - Sydney](https://jobs.opennash.com/companies/jpmorganchase/jobs/06cd5914afa76aa20edd/) JPMorganChase · Sydney, NSW, Australia ### [Demand Supply Planning Lead, EOS, SEA](https://jobs.opennash.com/companies/cargill/jobs/f886e86255aa13a7f269/) Cargill · Kuala Lumpur, Malaysia ### [Enterprise Systems Engineer (SecOps) - Sydney/Melbourne](https://jobs.opennash.com/companies/fortinet/jobs/4d111d0f8a76e36f707a/) Fortinet · SYDNEY, NSW, Australia ### [Product Engineer / Estimator Sydney, Macquarie Park, New South Wales Sydney, Macquarie Park, New South Wales DEVELOPMENT / CONSTRUCTION / PROJECT MANAGEMENT DEVELOPMENT / CONSTRUCTION / PROJECT MANAGEMENT Permanent](https://jobs.opennash.com/companies/vinci/jobs/f03c926b568c3d86e3ef/) VINCI · Sydney, Macquarie Park, New South Wales OpenNash lists jobs from employers’ own careers sites and does not handle applications. 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