Senior Android Native Engineer (Kotlin) — Speech, Services, Performance

Location : Remote (Spain) with in‑person meetups around Costa del Sol (Fuengirola) — this is required

Employment : Contractor or Full‑Time (flexible)

Compensation : Fair and market‑competitive

We are a small, focused startup building a high‑performance mobile experience. We’re looking for a senior Android engineer who lives and breathes native Android and system‑level work — someone who can own long‑lived services, audio pipelines, and on‑device speech recognition with a strong focus on reliability and efficiency. You will lead the native Android layer that powers and integrates with our existing app.

What you’ll do

• Own the architecture and implementation of a long‑running foreground service for continuous speech recognition and audio capture.
• Leverage Android’s SpeechRecognizer APIs (and alternative engines when appropriate) with robust RecognitionListener handling, on‑device / offline models, partial results, punctuation, and engine / package selection.
• Engineer resilient lifecycle behavior across process death, Doze / App Standby, and OEM quirks :
• Proper process isolation, notification channels, and foregroundServices
• Boot persistence and battery optimization considerations
• Design efficient audio recording with attention to latency, buffering, acoustic echo cancellation / noise suppression, and storage management.
• Implement robust IPC patterns (Binder / Messenger / BroadcastReceiver) for communication between the service and app. You might integrate with an existing Module bridge while keeping the native module self‑sufficient.
• Build adaptive recovery strategies : automatic restart / backoff, memory / CPU monitoring, and graceful degradation across devices.
• Maintain high performance : profiling, tune allocations, minimize wakeups, and reduce battery / memory footprint.
• Keep us current with Android platform changes (Android 13 / 14+ foreground service policies, microphone service types, notifications permission) and adopt relevant new APIs when they help reliability or efficiency.

Must‑have experience

Nice to have

Working style

How to apply

Send your CV, GitHub / Bitbucket, and a brief note describing :

We’re excited to meet someone who loves working close to the metal on Android and enjoys squeezing maximum reliability and efficiency out of mobile devices.

Must be based near Costa del Sol (Fuengirola). Remote work with periodic in‑person sessions is required.

Compensation is fair and market‑competitive, commensurate with experience.

Start date : Flexible, as soon as we find the right person.

Language : English.

Contract type : Flexible (contract or full‑time).

Hardware : We can provide test devices if needed.

Confidentiality : NDA may be required.

In a sentence : Native Android speech and service stack, keep it lean and resilient, and help us push the platform to its limits responsibly.