About the Job
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 Intern...
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 ...
Key Responsibilities
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.
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.
Required Skills & Abilities
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, including binary size, battery use, startup time, and main-thread overhead
Familiarity with how native SDKs are consumed by cross-platform frameworks such as React Native and Flutter is a plus
Familiarity with lower-level languages like C++ or Rust for high-performance, cross-platform security modules is a plus
