Senior Software Engineer - Addressing Team

CloudFlare; Canada; Hybrid; CAD 110,000 - 140,000; Full time

Job summary

Cloudflare is seeking a Senior Software Engineer for the Addressing team. You will design and implement microservices in Go, build APIs, and model data to support rapidly expanding address management across our edge network.

You’ll dive into IP provisioning pipelines, go deeper into DNS and traffic engineering, and collaborate across reliability, network, and product engineering. This role is hybrid with collaboration across teams and locations.

Qualifications

• Curious mindset and willingness to learn new domains.
• Proven ability to lead and shape products and system designs.
• Experience writing high-quality code in Go, Python or C/C++.
• Strong Unix/Linux development and runtime experience.
• Solid understanding of TCP/IP and networking basics.
• Working knowledge of SQL and relational databases.
• Experience building and operating distributed systems.
• Excellent debugging and problem-solving skills.

Responsibilities

• Architect, program, and maintain core services for large corporate networks.
• Design and develop APIs and data models for addressing needs.
• Learn edge routers, servers, DNS, and IP provisioning pipelines.
• Collaborate with reliability, network, and product engineering teams.
• Build scalable platforms used across the company.

Skills

Go

Python

C/C++

Unix/Linux

TCP/IP

HTTP TLS

SQL

Distributed systems

Debugging

Leadership

Tools

Docker

Kafka

Lua

ClickHouse

SaltStack

Prometheus

Job description

Senior Software Engineer - Addressing Team

Hybrid

About Us

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. Cloudflare was named to Entrepreneur Magazine’s Top Company Cultures list and ranked among the World’s Most Innovative Companies by Fast Company.

At Cloudflare, we’re not looking for people who wait for a polished roadmap; we’re looking for the builders who see the cracks in the Internet that everyone else has simply learned to live with. We value candidates who have the instinct to spot a "normalized" problem and the AI-native curiosity to create a solution using the latest tools. Our culture is built on iteration, leveraging AI to ship faster today to make it better tomorrow, while ensuring that every improvement, no matter how small, is shared across the team to lift everyone up. If you’re the type of person who values curiosity over bureaucracy, and that AI is a partner in solving tough problems to keep the Internet moving forward, you’ll fit right in.

Available Locations: Austin, TX | London, UK | Lisbon, Portugal

About the Team

Cloudflare operates one of the largest and most interconnected anycast networks on the Internet. To make that happen, a complex orchestra of IP address configuration and distributed systems need to be in harmony to deliver packets from users, through our edge network and then onwards to our customers origin servers or networks.

On the Addressing team, you will architect, program, and maintain core software services that enable large corporate networks to be protected by Cloudflare. Recent projects range from IP conservation efforts, supporting use cases for Policy driven IP address assignment, designing traffic engineering tools that improve the quality of service for billions of users around the world, and building customer APIs to control BGP dynamically.

The Addressing team works closely with our system reliability engineers, network engineers and product engineering teams to build automated systems that span the entire Cloudflare stack.

About the role

We are looking for talented Software Engineers to join our small but growing team. You will work on a range of microservices written mainly in Go. You’ll be designing and developing new APIs and data models to manage our rapidly expanding addressing needs.

The ever growing suite of Cloudflare products and services means our addressing tools are always evolving. You will have the opportunity to take on very impactful projects critical for Cloudflare. You will spend time learning the inner workings of our edge routers, servers, DNS and IP provisioning pipelines. You will work closely with other engineers to understand their needs and create scalable platforms to be used across the company.

Some of the technologies we use include Go, PostgreSQL, Docker, Kafka, Lua, Clickhouse, SaltStack, Prometheus and the usual Unix/Linux tools and workflows. We strive to build reliable, fault-tolerant systems that can operate at Cloudflare’s scale.

Examples of desirable skills, knowledge, and experience

• You are naturally curious and willing to take a step to learn something you don’t have experience in
• You lead. We are a growing team and you will have a huge role shaping our products, tools and system designs from the ground up
• You have experience writing high-quality code in one or more system programming languages (Go, Python, C/C++)
• You have experience with modern Unix/Linux development and runtime environments
• You have a solid understanding of TCP/IP and basic networking in general
• You have a basic understanding of the HTTP/S/TLS stack
• You have a working knowledge of SQL and relational databases such as PostgreSQL or MySQL
• You have experience building and operating distributed systems
• You have excellent debugging skills and attention to detail when breaking down problems

Bonus Points

• Experience working with Go
• Experience working with Rust
• Familiarity with UI design, workflows and implementation
• Familiarity with anycast or multi-site unicast networks
• Knowledge of DNS and DNS based traffic management techniques (e.g geo DNS)

What Makes Cloudflare Special?

We’re not just a highly ambitious, large-scale technology company. We’re a highly ambitious, large-scale technology company with a soul. Fundamental to our mission to