Software Engineer, EOS (Early-career/Mid-level) - Sydney
Confirmed on the employer's own hiring board on Nov 1, 2026. First seen by Alion on Jul 3, 2026. Arista Networks scores B on the Alion truth index.
Arista Networks is an industry leader in data-driven, client-to-cloud networking for large data center, campus and routing environments. What sets us apart is our relentless pursuit of innovation. We leverage the latest advancements in cloud computing, artificial intelligence, and software-defined networking to provide our clients with a competitive edge in an increasingly interconnected world. Our solutions are designed to not only meet the current demands of the digital landscape but to also anticipate and adapt to future challenges.
At Arista we value the diversity of thought and perspectives that each employee brings to the table. We believe that fostering an inclusive environment, where individuals from various backgrounds and experiences feel welcome, is essential for driving creativity and innovation.
Our commitment to excellence has earned us several prestigious awards, such as Best Engineering Team, Best Company for Diversity, Compensation, and Work-Life Balance. At Arista, we take pride in our track record of success and strive to maintain the highest standards of quality and performance in everything we do.
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.
Required:
A degree in Computer Science, Computer Engineering, or Electrical Engineering (BSc, MS, or PhD).
High proficiency in C/C++.
Proficiency in Python.
Preferred:
Solid understanding of operating systems. Proficiency in systems programming, preferably in a UNIX/Linux environment.
A strong interest in computer networking technologies.
Desired:
Familiarity with L2/L3 networking protocols (e.g., BGP, OSPF, IS-IS, Spanning Tree, LACP).
Familiarity with infrastructure functions related to distributed systems such as messaging, signaling, databases, and command line interface techniques.
“Please note: We are not engaging external recruiters for this role. Only direct applications will be considered.”
Australian work Rights
Only candidates with Australian Citizenship, Australian Permanent Residency or otherwise a demonstrable legal entitlement to work in Australia for the duration of employment, will be considered for roles in Australia. Please review open roles in other geographical regions of Arista if you have complementary skills.