C
Cloudflare
Software Engineer (Mobile SDK)
Skills
RustKotlinSwiftReactIOSFlutterReact Native
12 days ago
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Important information
Contract type:
Permanent
Location:
United Kingdom
Work mode:
Onsite
Published on:
11 October 2026
What they need
- 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
Benefits
- Competitive pay: We offer a competitive total rewards package, where every employee is an owner of our stock.
- Take-what-you-need vacation: We encourage employees to find a comfortable work-life balance by taking as many days off as they need while still being able to perform their jobs satisfactorily. (We really mean it!)
- Paid maternity & paternity leave: Our global parental leave policy allows up to sixteen paid weeks of bonding leave time for all qualifying new parents.
- Employee benefits: We offer a comprehensive benefits package including healthcare, life insurance, short- and long-term disability, pension plans in accordance with the market practice in our locations.
- Commuter program: We are flexible about where we work and value connecting at the office. Our commuter benefits program is in place to support team members’ commute to work via public transportation without the extra cost burden.
- Wellbeing: Global offerings that provide mental health, childcare and family forming support to our employees across our offices.- 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
- Understanding of mobile package distribution, source and binary compatibility, dependency management, and reliable release practices
- Experience mentoring engineers and raising a team’s technical bar through design review, code review, and knowledge sharing
- Experience designing or owning customer-distributed SDKs, libraries, or similarly constrained developer-facing products
- Experience diagnosing production issues that cross application, SDK, network, and service boundaries, while designing safe diagnostics that do not expose sensitive data
- 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 writing technical designs and aligning decisions across product, client, backend, edge, and security teams
- 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
- 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
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