Senior/Staff Android SDK Engineer

Responsibilities

• Implement and maintain the Android SDK layer using Kotlin and the VpnService API
• Design clean, stable, and developer-friendly SDK APIs for enterprise partners
• Optimize SDK performance regarding latency, connection stability, and battery efficiency
• Lead AI-assisted development using Claude Code to orchestrate agents and accelerate shipping quality
• Build abstractions that simplify VPN integration for external developers
• Define and own observability, reliability, and security standards including structured logging and alerting
• Support enterprise clients with platform-specific integration issues

Requirements

• Proven expertise in Android development using Kotlin and VpnService
• Deep understanding of the Android networking stack
• Experience designing professional-grade SDK APIs and platform abstractions
• Modern approach to AI-assisted engineering, including experience guiding AI agents to deliver production systems
• Strong understanding of software design principles and architectures
• High degree of ownership and ability to operate independently

Preferred Qualifications

• Experience in mobile SDK or library development
• Background in VPN technologies, authentication systems, or secure networking
• Experience with the iOS ecosystem or cross-platform mobile technologies
• Knowledge of mobile security best practices such as encryption and certificate pinning
• Experience working on B2B or white-label platforms

Benefits

• Work with a modern tech stack in a strong engineering culture
• Influence on technical decisions and significant room to innovate
• Continuous learning opportunities and professional development support
• A motivated, collaborative team with flat hierarchies
• Strategic role with real technical influence and ownership

About the Company

ExpressVPN is one of the world’s leading providers of online privacy and security services. With millions of active customers and a global team, we provide secure connectivity through high-performance VPN technology. We value security, quality, and engineering depth over quick hacks.