Staff macOS/iOS Developer

Zscaler•San Jose, CA

8d•Hybrid

About The Position

Zscaler is a pioneer and global leader in zero trust security. The world’s largest businesses, critical infrastructure organizations, and government agencies rely on Zscaler to secure users, branches, applications, data & devices, and to accelerate digital transformation initiatives. Distributed across more than 160 data centers globally, the Zscaler Zero Trust Exchange platform combined with advanced AI combats billions of cyber threats and policy violations every day and unlocks productivity gains for modern enterprises by reducing costs and complexity. Here, impact in your role matters more than title and trust is built on results. We believe in transparency and value constructive, honest debate—we’re focused on getting to the best ideas, faster. We build high-performing teams that can make an impact quickly and with high quality. To do this, we are building a culture of execution centered on customer obsession, collaboration, ownership and accountability. We champion an “AI Forward, People First” philosophy to help us accelerate and innovate, empowering our people to embrace their potential. If you’re driven by purpose, thrive on solving complex challenges and want to make a positive difference on a global scale, we invite you to bring your talents to Zscaler to help shape the future of cybersecurity. Role We are looking for a macOS/iOS Developer based in San Jose, CA (Hybrid), reporting to the Sr. Manager of Software Engineering in the Endpoint Engineering department. You will be a key driver on the Mobile team, developing cross-platform client applications for MacOS and iOS that securely steer traffic to the world’s largest cloud security platform. Your vision and technical expertise will enable organizations worldwide to harness speed and agility through a cloud-first strategy, directly impacting a global footprint of over 65 million users. You thrive in ambiguity. You're comfortable building the path as you walk it. You thrive in a dynamic environment, seeing ambiguity not as a hindrance, but as the raw material to build something meaningful. You act like an owner. Your passion for the mission fuels your bias for action. You operate with integrity because you genuinely care about the outcome. True ownership involves leveraging dynamic range: the ability to navigate seamlessly between high-level strategy and hands-on execution. You are a problem-solver. You love running towards the challenges because you are laser-focused on finding the solution, knowing that solving the hard problems delivers the biggest impact. You are a high-trust collaborator. You are ambitious for the team, not just yourself. You embrace our challenge culture by giving and receiving ongoing feedback—knowing that candor delivered with clarity and respect is the truest form of teamwork and the fastest way to earn trust. You are a learner. You have a true growth mindset and are obsessed with your own development, actively seeking feedback to become a better partner and a stronger teammate. You love what you do and you do it with purpose.

Requirements

4+ years of professional software development experience specializing in Objective C, SWIFT, or C++
Proven experience working with RESTful APIs, offline storage, multi-threading, and performance tuning
Extensive knowledge of the Mac/iOS ecosystem and the standard libraries used for common engineering tasks
Demonstrated ability to translate product requirements into high-quality, scalable technical solutions

Nice To Haves

Deep technical understanding of the Mac networking stack, networking protocols, and modern architectural design patterns
Professional familiarity with PKI, network security technologies, cloud message APIs, or Apple Push Notifications

Responsibilities

Develop high-performance macOS and iOS applications and frameworks that serve as the gateway to our global cloud security platform
Partner with product managers to translate complex requirements and design mockups into clean, high-quality code
Take accountability for the performance, quality, and responsiveness of applications to ensure a seamless user experience
Uphold and evolve engineering excellence by maintaining rigorous code quality, standards, and automation practices
Act as a technical point of escalation to troubleshoot and resolve complex customer issues with speed and precision