Mobile SDK Developer (iOS + Android)

Vox AI; Amsterdam; On-site; EUR 90,000 - 120,000; Full time

Benefits offered by this job

Competitive salary + stock options

Key role in shaping the mobile developer experience

Work with cutting-edge AI stack

Small, focused team

Work from downtown Amsterdam office

Job summary

A technology company based in Amsterdam is seeking a Mobile SDK Developer to create advanced voice AI SDKs for iOS and Android platforms. You will work on implementing real-time audio streaming and optimizing performance while collaborating with backend engineers. The ideal candidate has proven experience in mobile SDK development, strong proficiency in Swift, Kotlin, and Java, and knowledge of AI-assisted coding tools. This role offers a competitive salary with stock options and the chance to work in a cutting-edge environment.

Qualifications

• Proven experience delivering production-grade mobile SDKs for both iOS and Android.
• Deep knowledge of WebRTC and WebSockets.
• Strong skills in Swift, Kotlin, and Java.
• Experience with real-time audio streaming and performance optimization.
• Ability to build and release native mobile apps.
• Familiarity with AI-assisted coding tools.
• Strong networking and multithreading in mobile apps.
• Bonus: TypeScript/React Native, voice AI, or QSR knowledge.

Responsibilities

• Develop and maintain iOS and Android SDKs for voice and AI features.
• Implement WebRTC-based audio streaming and WebSocket messaging.
• Build functional sample/demo apps to showcase SDK capabilities.
• Write developer-focused documentation and publish SDKs.
• Write developer-focused documentation and publish SDKs to CocoaPods, Swift Package Manager, Maven Central, and Gradle.
• Integrate AI-assisted coding tools into workflows.
• Collaborate with backend engineers to align features with APIs.
• Set up CI/CD pipelines and automated tests for SDK stability.

Skills

Swift

Kotlin

Java

WebRTC

WebSockets

Networking

Multithreading

TypeScript

React Native

CI/CD

Tools

CocoaPods

Swift Package Manager

Maven Central

Gradle

Job description

Mobile SDK Developer (iOS + Android)

Location: Amsterdam, North Holland, Netherlands

Company: Vox AI – building an advanced voice operating system for restaurants, enabling real‑time voice and AI capabilities.

Responsibilities

• Develop and maintain iOS (Swift) and Android (Kotlin/Java) SDKs that expose real‑time voice and AI features to partner developers.
• Implement WebRTC‑based real‑time audio streaming and WebSocket data messaging.
• Build fully functional sample/demo apps to demonstrate SDK capabilities.
• Optimize audio performance for low latency and high quality.
• Write clear, developer‑focused documentation and publish SDKs to CocoaPods, Swift Package Manager, Maven Central, and Gradle.
• Integrate AI‑assisted coding tools (Claude Code, GitHub Copilot, Cursor AI) into workflows.
• Collaborate closely with backend engineers to align SDK features with API capabilities.
• Set up CI/CD pipelines and automated tests to ensure SDK stability.

Requirements

• Proven experience delivering production‑grade mobile SDKs for both iOS and Android.
• Deep knowledge of WebRTC and WebSockets.
• Strong skills in Swift, Kotlin, and Java.
• Experience with real‑time audio streaming and performance optimization.
• Ability to build and release complete native mobile apps.
• Familiarity with AI‑assisted coding tools (Claude Code, GitHub Copilot, Cursor AI).
• Strong understanding of networking and multithreading in mobile apps.
• Bonus: TypeScript/React Native experience, voice AI, or QSR/restaurant tech knowledge.

Benefits

• Competitive salary + stock options.
• Key role in shaping Vox AI’s mobile developer experience.
• Work with a cutting‑edge AI stack (Claude, custom models).
• Join a small, focused team competing with industry giants.
• Work from our office in downtown Amsterdam.