Greenhouse ·
full-timeSoftware Engineer, Mobile SDK
Cloudflare · Hybrid
Cloudflare operates a global network designed to improve the performance, security, and reliability of internet applications. This internship role focuses on the WARP Mobile SDK team, where the selected candidate will contribute to the development and maintenance of security-focused mobile SDKs. Day-to-day responsibilities involve defining client architecture and public APIs for native iOS and Android platforms, ensuring that the resulting tools are lightweight, well-documented, and easily integrated by customer engineering teams. The role requires setting rigorous standards for mobile performance, diagnostics, and binary size while collaborating with cross-functional teams to resolve complex integration issues. This position is well-suited for a candidate with deep technical expertise in either Swift or Kotlin and a strong understanding of mobile networking stacks and security concepts. Successful applicants will demonstrate a track record of building distributed software, a commitment to maintaining source and binary compatibility, and the ability to navigate the constraints of mobile development environments. Candidates should be comfortable working in a hybrid setting and possess the analytical skills necessary to diagnose production issues across application and network boundaries.
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, including binary size, battery use, startup time, and main-thread overhead Bonus Points: 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 Compensation Compensation may be adjusted depending on work location. Equity This role is eligible to participate in Cloudflare’s equity plan. Benefits Cloudflare offers a complete package of benefits and programs to support you and your family. 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! The below is a description of our benefits for employees in the United States, and benefits may vary for employees based outside the U.S. Health & Welfare Benefits Medical/Rx Insurance Dental Insurance Vision Insurance Flexible Spending Accounts Commuter Spending Accounts Fertility & Family Formin
| Role | Software Engineer, Mobile SDK |
|---|---|
| Company | Cloudflare |
| Location | Hybrid |
| Type | internship |
| Compensation | Not disclosed |
| Posted | 2026-10-02 |
| Deadline | Rolling |
Typical process for this type of role
A general guide — the exact steps for this specific listing may vary; check the original posting for details.
- 1ApplicationSubmit your resume through the apply link.
- 2ScreeningRecruiter reviews your background against the role.
- 3AssessmentA technical test, assignment, or coding round, depending on the role.
- 4Interview(s)One or more rounds with the hiring team.
- 5OfferOffer letter with compensation and start date.
Before you apply
0/4Software Engineer, Mobile SDK at Cloudflare: frequently asked questions
- What is the salary for this role?
- Cloudflare has not stated compensation in the listing. Check the original posting or ask during the application process.
- Is the Software Engineer, Mobile SDK position remote, hybrid or onsite?
- The listing gives Hybrid as the location and does not state a work mode.
- What is the application deadline?
- Cloudflare has not listed a fixed deadline, so apply early in case the opening is filled.
- How do I apply for the Software Engineer, Mobile SDK role?
- Use the Apply button on this page. It opens the original listing on boards.greenhouse.io, where you submit your application with the company.
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