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Senior macOS Developer

1 hour, 43 minutes ago
United States, Canada, United Kingdom
Full-time
Senior
Software Engineer
Software Development
C C++ CI/CD DNS Git GitHub Actions Go iOS Jenkins macOS Objective-C Python Swift TCP/IP TLS Wireshark Xcode
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DNSFilter

DNSFilter

DNSFilter offers industry-leading protective DNS and content filtering solutions with cloud-delivered services. Protecting over 30,000 organizations worldwide, it provides real-time threat protection and content filtering without the need for in-house ...

IT Services
51-250
Founded 2015
$62M raised
View All Jobs

Description

  • Develop DNSFilter’s next-generation macOS client application and System Extension for secure DNS and network traffic interception.
  • Design, build, and maintain a NetworkExtension-based application using Apple’s NEDNSProxyProvider and NEFilter frameworks.
  • Collaborate with QA and product teams to define feature requirements and acceptance criteria.
  • Contribute to the delivery of business value through new product features and platform capabilities.
  • Expand technical knowledge across the company’s product and technology ecosystem.
  • Troubleshoot and optimize low-level networking behavior, including kernel-level bottlenecks and packet handling.
  • Support deployment and maintenance of the macOS and iOS client in a globally distributed SaaS environment.

Requirements

  • 5+ years of experience developing and maintaining macOS applications.
  • Strong experience with System Extensions and NetworkExtension frameworks, including NEDNSProxyProvider and NEFilterControlProvider.
  • Expertise in low-level networking optimization, socket programming, and packet-level data manipulation.
  • Deep understanding of DNS fundamentals, including TCP/IP, DoH, and DoT protocols.
  • Proficiency in Swift and Objective-C; experience with Go, C, or C++ is preferred.
  • Experience with macOS development tools such as Xcode, Instruments, lldb, tcpdump, and Wireshark.
  • Experience with code signing, entitlements, provisioning profiles, and notarization.
  • Knowledge of MDM platforms such as Jamf and Mosyle, plus enterprise deployment best practices.
  • Experience with Git, modern CI/CD pipelines, and automated testing frameworks.
  • Strong communication skills and comfort working in distributed, asynchronous teams.
  • Availability to work hours overlapping 9am–5pm EST, Monday–Friday.
  • Deep knowledge of macOS internals and system-level debugging is a plus.
  • Experience implementing DNS filtering, proxying, or network interception technologies is a plus.
  • Familiarity with CI systems such as GitHub Actions or Jenkins is a plus.
  • Experience with scripting languages such as Python, Shell, or Go for build and deployment automation is a plus.
  • Exposure to TLS, mutual authentication, or certificate pinning is a plus.
  • Understanding of endpoint protection, security auditing, or privacy compliance standards is a plus.
  • Proximity to the Tampa, FL office is a plus.

Benefits

  • U.S. base salary range of $140,000 to $150,000 USD.
  • Pay-for-performance compensation model with advancement based on results over time.
  • Flexible vacation policy.
  • Paid company-wide week off at the end of each year.
  • Full medical, dental, and vision coverage for US, UK, and Canada-based employees.
  • Short-term disability and life insurance, with optional long-term disability coverage.
  • Retirement savings account options with vested company matching for qualifying employees.
  • In-person annual gatherings and company events.
  • Company swag.

Interested in this position?

Apply directly on the company website

Apply Now

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