Job Description

Senior C++ Developer (Voice Communications)

Overview

Location: Chicago, IL or Remote (US-based)
Start: Immediate

About Instant Connect

Instant Connect Enterprise (ICE) brings all your teams voices into one ecosystem over the Internet Protocol (IP).

As the worlds leading interoperable tactical communications platform for military, government, and industry, ICE channels work across any network and deviceconsumer radios, military radios, IP and cellular devices like smartphones and laptops, phone systems, and more. Users can push-to-talk, text, or call teammates on shared channels, anywhere in the world.

ICE comes with several cutting-edge features:

• Dynamic Talk Group: a super patch that can connect channels, previously patched channels, people, or groupsall in seconds.
• Translation : channels can be enabled for real-time translation, with support for 70+ languages.
• Voice for ATAK: a plug-in for the Android Team Awareness Kit, adding talk channels to the popular situational awareness app.
• Ops Log: automatically captures and organizes all communications voice transmissions, texts, comments, and more for every channel assigned to a mission or operation.

At Instant Connect, youll help shape solutions that enable military units, first responders, and industrial teams to act fast, stay coordinated, and succeed under pressure. By joining our innovative team, youll tackle real-world challenges with a purpose: to help tactical teams achieve their missions.

If this sounds like the kind of impact youd like to have, were ready to talk!

Instant Connect Software LLC is part of the Dillon Kane Group (DKG ) (dillonkane.com ), a Chicago-based leader in innovative technology solutions that has been serving diverse industries since 2002.

Role

Were seeking a Senior C++ Developer with deep experience in network programming (e.g., Linux network APIs), real-time audio systems, and secure communications. The ideal candidate understands PKI and TLS, and brings experience with VoIP / SIP-based signaling in telephony or land-mobile radio. This is a senior hands-on role that combines technical excellence with collaboration and mentoring.

Key Responsibilities:

• Implement and maintain real-time C++ systems for voice/audio streaming.
• Develop robust, low-latency network communication using RTP, IGMP multicast, WebSockets, and custom protocols.
• Implement secure communication layers using X.509 certificates and PKI standards.
• Drive best practices in code quality, testing, and performance tuning.
• Collaborate across disciplines, including DevOps, frontend, and audio engineering teams.

Required Skills

• 8+ years of experience in modern C++ (C++14/17/20), with a focus on systems and Linux network programming.
• Strong experience with SIP and signaling protocols in VoIP systems.
• Strong knowledge of TCP/UDP, asynchronous IO, and multithreaded programming.
• Proven experience with real-time audio/media applications.
• Solid experience with Make/CMake build systems, DevOps.
• Deep understanding of PKI / X.509 certificates, TLS, and secure networking.
• Excellent communication and leadership abilities.
• Nice to have: Experience with WebRTC, Opus, jitter buffers, or other real-time media stacks.
• Nice to have: Exposure to cloud-native architectures and CI/CD workflows.
• Nice to have: Hands-on experience compiling to WebAssembly (WASM) using Emscripten.

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