Senior Software Engineer, Security Rules

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.

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.

Cloudflare’s Engineers build and operate the software that helps power 25+ million Internet properties and millions of businesses around the world. We’re looking for talented team members to help build high-growth products, help scale our expanding network, build tools to improve availability, performance, uptime, and response times, and make systems failure-resistant and ready-to-scale. We are looking for a talented Systems Engineer to join the Security Rules team.

Technologies we use include Docker, Go, PostgreSQL, Redis, Memcached, gRPC, Kafka, Clickhouse and the usual Unix/Linux tools and workflows. As a senior engineer, you will take ownership of complex technical problems, lead projects from design through production operation, and help shape the architecture and reliability of systems that run at Cloudflare’s scale. You will also mentor other engineers, provide thoughtful technical guidance, and help raise the quality of engineering practices across the team.

This role may require flexibility to be on-call outside of standard working hours to address technical issues as needed. Design, implement, and maintain the software systems that comprise Cloudflare’s Application Security Product Offering such as Rate Limiting,



Web Application Firewall and more Lead technical design and execution for complex projects, helping define architecture, tradeoffs, milestones, and delivery plans. Collaborate with internal teams, including security, network engineering, SRE, and product management, to design scalable solutions to difficult technical problems.

Help raise the technical bar for the team by identifying systemic improvements, reducing operational toil, and influencing long-term engineering direction. Review work from your peers throughout all stages of the development lifecycle to ensure high-quality, maintainable code. Mentor engineers across the team by sharing technical context, providing thoughtful code and design feedback, and helping others grow in scope and ownership.

Work with a wide range of technologies and programming languages, including Rust, Go, as well as various databases (SQL and No-SQL), Docker, and Kubernetes. 6+ years of relevant skilled experience with a technology company Strong programming skills in Rust, Go, C++, or a similar systems-level language Demonstrated ability to lead complex technical projects from ambiguity through delivery Experience building and operating distributed systems Experience mentoring engineers, reviewing technical designs and providing high-quality code review.

Experience with monitoring, alerting and debugging high volume production systems Experience with databases (we use PostgreSQL, Clickhouse and Memcached) Bonus Points: Experience influencing technical direction across a team or product area Experience with modern Unix/Linux development and runtime environments Experience with monitoring and logging tools like Prometheus and Grafana Equity

This role is eligible to participate in Cloudflare’s equity plan. Our benefits programs can help you pay health care expenses, support caregiving, build capital for the future and make life a little easier and fun! Medical/Rx Insurance Flexible Spending Accounts Commuter Spending Accounts On-demand mental health support and Employee Assistance Program Global Travel Medical Insurance Short and Long Term Disability Insurance 401(k) Retirement Savings Plan Flexible paid time off covering vacation and sick leave Leave programs, including parental, pregnancy health, medical, and bereavement leave 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 help build a better Internet is protecting the free and open Internet.

Project Galileo : Since 2014, we've 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've provided services to more than 425 local government election websites in 33 states. 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. Here’s the deal - we don’t store client IP addresses never, ever. We will continue to abide by our privacy commitment and ensure that no user data is sold to advertisers or used to target consumers.

Please note that applicants who progress to the offer stage of the interview process may be asked to attend an in-person interview within one of the Cloudflare Offices or Cloudflare Hubs. More details about this will be available at that stage of the interview process. S. export control laws, including the U.Export Administration Regulations.

Please note that any offer of employment may be conditioned on your authorization to receive software or technology controlled under these U.We are committed to providing equal employment opportunity for all people and place great value in both diversity and inclusiveness. All qualified applicants will be considered for employment without regard to their, or any other person's, perceived or actual race, color, religion, sex, gender, gender identity, gender expression, sexual orientation, national origin, ancestry, citizenship, age, physical or mental disability, medical condition, family care status, or any other basis protected by law. Cloudflare provides reasonable accommodations to qualified individuals with disabilities.

Examples of reasonable accommodations include, but are not limited to, changing the application process, providing documents in an alternate format, using a sign language interpreter, or using specialized equipment.

📌 Senior Software Engineer, Security Rules (Winnipeg)
🏢 Cloudflare
📍 Winnipeg