Software Engineer, Unimog

CloudFlare; City of Westminster; On-site; GBP 50,000 - 70,000; Full time

Job summary

A leading network solutions provider in the UK seeks a software engineer to develop and maintain load distribution systems vital to its edge network. You will collaborate closely with various teams and tackle challenging projects using the latest network technologies. Candidates should be proficient in Linux kernel development, especially eBPF, and have a good grasp of Internet protocols. This role offers a unique opportunity to work on cutting-edge technology in a dynamic environment.

Benefits

Diverse and inclusive work culture

Professional development opportunities

Engaging projects with social impact

Qualifications

• Experience with Linux kernel network stack development, especially eBPF.
• Ability to write and understand Go code for complex systems.
• Curiosity to learn and adapt to new technologies.

Responsibilities

• Develop a load distribution system for Cloudflare's edge network.
• Collaborate with teams to ensure system performance and reliability.
• Participate in on-call rotations for production issues.

Skills

Linux kernel network stack development (particularly eBPF)

Distributed systems written in Go

Internet protocols and technologies (IP, TCP, UDP, etc.)

High code quality standards

Excellent communication and teamwork

Job description

Responsibilities

We are a team of software engineers who build distributed systems critical to keeping Cloudflare's network operating smoothly and efficiently. We work with the latest Linux network technologies and low‑level details of network protocols. But we're also responsible for sophisticated automated control systems. The code we write runs on thousands of servers in hundreds of data centres around the world. As the scale of Cloudflare's network and the variety of services we offer continue to grow, so do the challenges we tackle.

What you'll do: you will participate in the ongoing development of a load distribution system that works at the scale of Cloudflare's edge network. Millions of users and customers depend upon this system every hour of every day, even if it isn't visible to them. You'll take on challenging projects that require focus and determination, pragmatism and innovation, and careful consideration of risk. You'll get to know the details of Cloudflare's software and hardware infrastructure in order to design software that behaves well even when failures occur. You'll collaborate with engineers across the company, from operations teams to the teams that build our customer‑facing products. You'll inspect the production behaviour of our systems to check that they are working as intended and spot opportunities for improvement. You'll be part of the on‑call rota for the occasional cases when our operations teams need to elevate problems.

We Are Looking For

We are looking for smart, innovative team players that have broad experience covering some or all of Linux kernel network stack development (particularly eBPF), complex distributed systems written in Go, an understanding of Internet protocols and technologies like IP, TCP, UDP, QUIC, DNS, HTTPS, BGP, and the curiosity to learn more about these things. You will be in a team that questions everything to get to the most appropriate solution in a timely manner. People who excel in this role:

• Willing to write code in Go.
• Relish opportunities to dive into new technologies, and a demonstrated ability to do so.
• Awareness of networking concepts down to layer 2.
• Commitment to high code quality standards, both individually and as part of a team.
• Comfortable understanding and working with complex distributed systems.
• Understanding of techniques to manage risk when evolving critical systems.
• Excellent communicator and team player.

Bonus Points / Desired Qualifications

• Prior experience with Linux kernel network stack development (eBPF).
• Solid understanding of routing protocols, particularly BGP.
• Experience with complex distributed systems written in Go.
• Strong grasp of Internet protocols such as IP, TCP, UDP, QUIC, DNS, HTTPS, BGP.
• Familiarity with low‑level network technologies and Linux kernel development.

About Cloudflare

At Cloudflare, we are on a mission to help build a better Internet. Today the company runs one of the world's largest networks that powers millions of websites and other Internet properties for customers ranging from individual bloggers to SMBs to Fortune 500 companies. Cloudflare protects and accelerates any Internet application online without adding hardware, installing software, or changing a line of code. Internet properties powered by Cloudflare all have web traffic routed through its intelligent global network, which gets smarter with every request. As a result, they see significant improvement in performance and a decrease in spam and other attacks.

We recognize that people do not fit into neat boxes. We are looking for curious and empathetic individuals who are committed to developing themselves and learning new skills, and we are ready to help you do that. We cannot complete our mission without building a diverse and inclusive team. We hire the best people based on an evaluation of their potential and support them throughout their time at Cloudflare.

What Makes Cloudflare Special

• Project Galileo – Since 2014, we have equipped more than 2,400 journalism and civil society organizations in 111 countries with powerful tools to defend themselves against attacks that would otherwise censor their work, technology already used by Cloudflare's enterprise customers at no cost.
• Athenian Project – In 2017, we created the Athenian Project to ensure that state and local governments have the highest level of protection and reliability for free, so that their constituents have access to election information and voter registration. Since the project, we have provided services to more than 425 local government election websites in 33 states.
• 1.1.1.1 – We released 1.1.1.1 to help fix the foundation of the Internet by building a faster, more secure and privacy‑centric public DNS resolver. This is available publicly for everyone to use – it is the first consumer‑focused service Cloudflare has ever released.

Sound like something you'd like to be a part of? We'd love to hear from you!