Senior Mobile Developer

2 days ago

Prague, Hlavní město Praha, Czech Republic OpenVPN Full time €90,000 - €120,000 per year

We're looking for a Senior Mobile Developer to lead the development of CipherScale's cross-platform mobile client, enabling secure access and Zero Trust connectivity from iOS and Android devices. You'll be responsible for developing the core client used to establish secure connections, enforce policies, and manage authentication in our next generation Enterprise VPN and Zero Trust platform.

This is a highly technical role requiring strong familiarity with native software programming, networking, and secure software design. Your work will directly impact how users connect to protected networks, access internal services.

As a key member of the founding team, you'll shape our technical strategy, engineering practices, and system resilience. Your decisions will influence both product direction and company growth.

Responsibilities
  • Develop and maintain robust, secure desktop applications for iOS and Android
  • Interface directly with low-level OS APIs (i.e., Network Extension/VPN Service)
  • Integrate authentication flows (i.e. OAuth2, PKCE),and backend APIs
  • Implement features such as credential management and Always-on-VPN
  • Optimize app performance, responsiveness, and battery efficiency
  • Handle push notifications, offline states, and biometric access (Face ID, Touch ID)
  • Contribute to testing, code quality, release automation, and App Store / Play Store submission processes
  • Follow secure coding practices and protect against attack vectors
Required Qualifications
  • 4+ years of experience developing native and hybrid mobile development for iOS and/or Android.
  • Proficiency in at least two object-oriented languages (i.e., C++, Java, Kotlin, Swift, or Objective-C), but also in hybrid development using Typescript.
  • Familiarity with platform SDKs and device-level APIs (e.g., permissions, networking, secure storage)
  • Good understanding of networking fundamentals: TCP/IP, UDP, DNS, TLS/SSL, firewalls, DNS, etc.

Experience automating releases to Google Play, Apple TestFlight, and managing code signing workflows

Optional, but good to have
  • Familiarity with JavaScript, React Native, and TypeScript
  • Exposure to zero-trust networking or identity-based access systems
  • Prior work in privacy-first, networking-heavy, or security-sensitive apps
  • Knowledge of biometric auth, VPN profiles, or mobile security compliance (i.e., MDM, sandboxing)
  • Familiarity with using AI productivity tools (e.g., GitHub Copilot, Cursor, CodeWhisperer, OpenAI, etc.)
  • Experience in cybersecurity
What We Offer
  • Competitive salary and comprehensive benefits.
  • Opportunity to work directly with executive leadership and shape strategy.
  • Full autonomy and support to build, experiment, and innovate.
  • A culture that prizes speed, creativity, and measurable results.

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