Software Engineer, Mobile SDK

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

What you'll do

We're looking for a Senior Software Engineer to join our WARP Mobile SDK team to help build the future of our mobile security SDKs.

Responsibilities

In this role, you will define the client architecture and public APIs for native iOS and Android SDKs, working from deep expertise in at least one of those ecosystems. You will establish foundations that are testable, well-documented, lightweight, and straightforward for customer engineering teams to integrate and operate.

As a senior software engineer, you will set standards for compatibility, diagnostics, performance, and release quality across mobile platforms. You will work closely with product and engineering partners to turn a security problem into a dependable developer product, mentor native mobile engineers, and help resolve complex customer integration issues. You will be successful in this role if you combine strong native engineering judgment and a track record of carrying distributed software from design through production operation.

Desirable Skills, Knowledge, and Experience

Deep experience building production software for either iOS with Swift or Android with Kotlin, and enough familiarity with the other ecosystem to guide shared architectural decisions

Experience designing or owning customer-distributed SDKs, libraries, or similarly constrained developer-facing products

Experience with mobile platform security concepts, including app and device integrity, secure key storage, application signing, authentication, and secure communications

Familiarity with native mobile networking stacks, HTTP APIs, and the integration challenges introduced by different application architectures and networking libraries

Experience diagnosing production issues that cross application, SDK, network, and service boundaries, while designing safe diagnostics that do not expose sensitive data

Understanding of mobile package distribution, source and binary compatibility, dependency management, and reliable release practices

Experience writing technical designs and aligning decisions across product, client, backend, edge, and security teams

Experience mentoring engineers and raising a team's technical bar through design review, code review, and knowledge sharing

Empathetic, proactive, and constructive written and verbal communication skills

Proven ability to operate within strict mobile performance budgets, includ