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Arista Networks · Sydney, NSW, Australia

# Software Engineer, EOS (Early-career/Mid-level) - Sydney

Sydney, NSW, Australia Full-time Software Engineering 

Listed on Arista Networks’s official careers site. Posted July 3, 2026. Check that it is still open and apply there.
[Apply on Arista Networks’s careers site →](https://jobs.smartrecruiters.com/AristaNetworks/744000135670709-software-engineer-eos-early-career-mid-level-sydney)

[OpenNash Jobs](https://jobs.opennash.com/) / [Arista Networks](https://jobs.opennash.com/companies/arista-networks/) / Software Engineer, EOS (Early-career/Mid-level) - 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). 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.

## At a glance
- Posted by the employer: Jul 3, 2026
- First seen by OpenNash: Jul 10, 2026
- Last checked: Oct 17, 2026
- Listed for: 106 days
- Location: Sydney, NSW, Australia
- Employment type: Full-time[Apply on Arista Networks’s careers site →](https://jobs.smartrecruiters.com/AristaNetworks/744000135670709-software-engineer-eos-early-career-mid-level-sydney)

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Dates come from the employer where stated; “first seen” and “last checked” are our own observations.

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