Android Developer

ENGINEERING
OPPORTUNITIES

Android Application Engineer

Connectivity and Audio

**Suggested experience:
**4+ years of Android development.

Project allocation: May
begin part-time during hardware feasibility; full-time during integration as
host interfaces stabilize.

About the project

We are developing an Android-based communication system for
sensor and control messages and audio over Wi-Fi HaLow and DECT NR+. The
project combines radio hardware, embedded firmware and Android software to
support controlled radio switching and reliable recovery. The phone platform
and host interfaces will be confirmed through feasibility and hardware
validation.

Your role

Extend the existing Android reference application into a
reliable user experience for control and audio across selectable HaLow and NR+
transports.

Key responsibilities

• 
  Maintain and extend the shared Java application;
  use Kotlin where appropriate to the agreed architecture.
• 
  Implement transport adapters behind a shared
  application interface, coordinating radio selection through the platform
  controller.
• 
  Support explicit network/socket binding or the
  selected Nordic host interface without unintended fallback.
• 
  Implement microphone capture, packetization,
  bounded buffering and automatic recovery after a radio transition.
• 
  Define pending-command behavior with request
  IDs, expiry, deduplication/reconciliation and clear status reporting.
• 
  Handle permission denial, device disconnects,
  activity lifecycle changes and interrupted transitions.
• 
  Add IPv6 or other transport support where
  required by the chosen NR+ integration.
• 
  Integrate native C/C++ transport or audio
  libraries through the Android NDK and JNI where needed, with clear ownership of
  buffers, threads and resource lifetimes.
• 
  Maintain Gradle/CMake native builds and
  troubleshoot native crashes, ABI compatibility and library packaging.

Required skills

• 
  Java/Kotlin, Android lifecycle, permissions,
  concurrency and Gradle.
• 
  Hands-on Android NDK, JNI and C/C++ development,
  including native memory management, threading and debugging.
• 
  CMake, Gradle native integration, Clang/LLVM
  cross-compilation and Android ABI/shared-library packaging.
• 
  Working knowledge of GCC toolchains and GNU Make
  builds for existing native and embedded codebases.
• 
  Android networking, sockets and network
  selection.
• 
  AudioRecord, PCM data handling and resource
  cleanup.
• 
  State-driven UI and asynchronous error handling.
• 
  Device-level debugging using adb, logcat and
  network diagnostics.

Preferred skills

• 
  USB host/serial integration, IPv6 and
  communication with embedded accessories.
• 
  Codec integration, jitter buffering and
  real-time audio troubleshooting.
• 
  Experience maintaining ndk-build projects using
  Android.mk and Application.mk.

GCC knowledge supports work with existing native and
embedded codebases; Android NDK builds use the applicable Clang/LLVM toolchain.

Expected outcomes

A shared application that supports both transports, resumes
automatically after switching, avoids duplicate control execution through
agreed protocol semantics, and clearly reports connection and audio state.