Software Engineer Intern 2026/2027

Posted 19 Days Ago
Be an Early Applicant
Dublin, IRL
In-Office
Internship
Cloud • Software • Analytics
The Role
Develop software for high-performance networking hardware and embedded Linux systems. Responsibilities include writing C/C++, Go, and Python code; implementing routing protocols and configuration services; programming ASICs, FPGAs, and hardware interfaces; reconciling kernel and switch forwarding states; and building automated testing systems for large-scale network devices.
Summary Generated by Built In
Company Description

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.

Job Description

Who you'll work with

Arista Networks is looking for Graduate Engineers interested in learning world leading product development in C/C++, Go and other languages. Join us at Arista Networks advancing the Software Defined Networking (SDN) revolution. 

What You’ll Do 

  • Writing Linux user space and kernel code to allow 32-bit drivers to DMA 64-bit virtual memory spaces using both Intel and AMD IOMMU controller.
  • Working on the hardware/software boundary for chips and the kernel. Where an x86 chip might have tens of registers, you will routinely work on ASICs with thousands of registers, tables, and special TCAM memories. You will program networking chips to provide latency analysis and keep accurate counts of events happening billions of times per second. You will write Python to bootstrap new hardware. You will build software agents that mediate and translate between the requirements of switching ASICs, high capacity custom FPGAs, media adapters, and PCIe bridges. You might tune lasers and measure and correct error rates measured in parts per billion. 
  • Implementing communications protocols between routers and switches at layer 2 (such as LLDP, 802.1x, BFD, etc), and layer 3 (such as BGP, OSPF, ISIS).
  • Updating the forwarding state of the hardware, using platform-independent abstractions.
  • Reconciling the linux kernel routing model with the switch's forwarding state.
  • Implementing a policy language used for filtering and manipulating routing data received and advertised to peers
  • Accessing ASIC registers over SPI bus, SMbus, PCIe and I2C, to implement high resolution timers (sub-100ns accuracy) and read ASIC hardware specifications to gather near-real-time information on large numbers of packet flows and to generate network congestion statistics.
  • Developing configuration management services using Go and Python to support YANG, OpenConfig, NETCONF and RESTCONF over gRPC, ssh and ssl for standardised switch configuration, combined with tools such as git, gerrit, Jenkins, Slack and Trello.
  • Developing routing protocol agents (for BGP, OSPF, ISIS) in C/C++ within a Fedora Linux embedded environment. Coding of fault-tolerant, concurrent agents capable of handling the demands of future data centres where high performance and high availability are basic requirements. Fully automated, developer owned, Python based, continuous test harness with 100s of devices under test at any one moment.

#LI-EO1

Qualifications

Any of the following:- C, C++, Java, Python, Go, react.js, redux.js, node.js Networking, Linux Embedded Systems, Algorithms, Programming, Software Development.

Additional Information

The working hours will be agreed in advance with the team manager.

Skills Required

  • C programming
  • C++ programming
  • Java programming
  • Python programming
  • Go programming
  • React.js
  • Redux.js
  • Node.js
  • Networking
  • Linux embedded systems
  • Algorithms
  • Programming
  • Software development

Arista Networks Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Arista Networks and has not been reviewed or approved by Arista Networks.

  • Leave & Time Off Breadth — Time away is positioned as generous, including unlimited PTO, paid holidays, and flexible hours with hybrid options. Parental leave is also included, supporting time off needs beyond standard vacation.
  • Equity Value & Accessibility — Equity participation is a notable component of rewards through RSUs and an employee stock purchase plan with a discount. This structure can materially increase total compensation when stock performance is favorable.
  • Wellbeing & Lifestyle Benefits — Everyday perks and wellness supports are broad, including on-site gym/showers, secured bike storage, stocked break rooms, discounted lunches, wellness webinars, and social events. Family-planning benefits add to lifestyle and wellbeing coverage.

Arista Networks Insights

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The Company
HQ: Santa Clara, CA
2,867 Employees
Year Founded: 2004

What We Do

Arista Networks was founded to pioneer and deliver software driven cloud networking solutions for large datacenter storage and computing environments. Arista’s award-winning platforms, ranging in Ethernet speeds from 10 to 400 gigabits per second, redefine scalability, agility and resilience. Arista has shipped more than 20 million cloud networking ports worldwide with CloudVision and EOS, an advanced network operating system. Committed to open standards, Arista is a founding member of the 25/50GbE consortium. Arista Networks products are available worldwide directly and through partners.

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