About The Company

HeadSpin is a leading provider of a comprehensive global device infrastructure and performance intelligence platform designed to empower engineering and QA teams in testing, monitoring, and optimizing mobile and web applications at scale. Our cutting-edge platform offers real-device access combined with in-depth network and performance telemetry, enabling teams to deliver high-quality digital experiences. The engineers behind HeadSpin work at the cutting edge of systems programming, mobile internals, and distributed infrastructure, continuously pushing the boundaries of what is possible in mobile testing and performance analysis.

Our commitment to innovation and excellence has established HeadSpin as a trusted partner for organizations seeking reliable and scalable solutions for mobile app quality assurance and performance monitoring.

About The Role

We are seeking a highly skilled System Software Engineer with extensive expertise in systems and networking to join our dynamic team. In this role, you will be responsible for developing and maintaining the core infrastructure that connects HeadSpin's platform to physical iOS and Android devices. Your work will be crucial in enabling real-device automation, remote debugging, and telemetry collection at scale.

You will own and enhance protocols, daemons, and communication layers, ensuring seamless and reliable device connectivity across diverse platforms. This position offers an exciting opportunity to work at the intersection of systems programming, network protocols, and mobile device internals, contributing to a product that impacts the global mobile ecosystem.

Qualifications The ideal candidate will possess over five years of experience in systems-level software engineering, with a strong background in networking and device communication protocols. Proficiency in programming languages such as Python and Go is essential, along with hands-on experience with POSIX systems programming,



including sockets, process management, and multithreading. A deep understanding of network protocols like TCP/UDP, QUIC, TLS 1.3, HTTP/2, HTTP/3, and WebSocket is required.

Candidates should have experience debugging with low-level tools such as lldb, dtrace, and Wireshark, and possess a solid grasp of OS internals and networking fundamentals, including the OSI model and device-specific protocols. Familiarity with developing REST APIs, WebSockets, RPC/gRPC protocols, and WebRTC is also highly desirable. A proactive learner with excellent problem-solving skills and the ability to adapt to evolving platform requirements will thrive in this role.

Responsibilities

As a System Software Engineer at HeadSpin, your key responsibilities will include designing, developing, and maintaining the device connectivity stack, including USB and network-based device sessions utilizing frameworks such as usbmuxd, remoted, and Apple's CoreDevice/RemoteXPC. You will build and extend low-level communication layers that interface with iOS internals, including lockdownd, DTServiceHub, and XPC services, ensuring reliable device interactions. Developing system-level daemons and services on Linux and macOS to handle device multiplexing, session management, and protocol translation will be a core part of your role.

You will work with various transport protocols such as TCP, QUIC, HTTP/2, WebSocket, and RPC to implement high-reliability device tunneling solutions. Collaboration with platform and product teams to expose device capabilities—such as screenshots, logs,



crash reports, and network HAR capture—will be essential, ensuring these features operate with low latency and high reliability. Additionally, you will stay abreast of Apple's evolving device communication models, adapting the platform as needed to support new protocols and frameworks introduced in recent iOS versions.

Benefits

HeadSpin offers a competitive benefits package designed to support our employees’ well-being and professional growth. Our offerings include comprehensive health insurance plans, including medical, dental, and vision coverage. We provide opportunities for continuous learning and development through workshops, training programs, and industry conferences.

Employees enjoy flexible work arrangements to promote work-life balance, along with generous paid time off and holidays. We foster a collaborative and innovative work environment that encourages ownership and creativity. Additional perks include performance-based bonuses, wellness programs, and access to cutting-edge technology tools.

At HeadSpin, we are committed to creating an inclusive culture that values diversity, promotes employee engagement, and recognizes individual contributions.

Equal Opportunity

HeadSpin is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. We do not discriminate based on race, color, religion, gender, gender identity or expression, sexual orientation, national origin, age, disability, or any other legally protected status.

We believe that a diverse workforce fosters innovation and drives our success. All employment decisions are made based on qualifications, merit, and business needs. We encourage candidates from all backgrounds to apply and join our mission to transform the future of mobile and web application testing and performance monitoring.

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