Mobile & AI Engineer

Creating
Mobile AI
Apps.

Full-stack developer and Mobile & AI engineer specializing in React Native, Python, and practical AI solutions. I build fast, reliable (mobile) apps with seamless AI integration.

View Projects
Based in The Netherlands
Mobile
iOS & Android
AI
Dev & Integration
Full Stack
React, RN & Python
Samuel Yost
AppBoost

AppBoost

Expo • React Native

Build your mobile app with one AI command.

Complete Expo React Native starter template with RevenueCat payments, PostHog analytics & feature flags, push notifications, 15+ pre-built components, onboarding flow, and Supabase backend integration.

Mobile App Template

RevenueCat Payments

Subscriptions, one-time purchases, free trials, restoration, and Remote Paywalls built-in.

PostHog Analytics

Built-in analytics and feature flags to understand users and ship with confidence.

Supabase Backend

Authentication, database, and real-time subscriptions pre-configured and ready to go.

Push Notifications

Complete setup with token management, permissions, and deep linking.

AI-Powered Setup

Run /appboost in Claude Code and AI configures everything via official MCP integrations.

Headshot AI

Headshot AI

React Native • Cloud AI

Professional AI Headshots.
In Seconds.

Transform any selfie into a stunning professional headshot with AI. Perfect for LinkedIn, resumes, and business profiles. No photographer, no studio — just upload, tap, and download.

iOS & Android

Preserves Your Identity

Keeps your facial features, skin tone, and unique characteristics intact.

8 Professional Styles

Corporate, LinkedIn, Cinematic, Creative, and more exclusive headshot styles.

Instant Generation

Get professional headshots in under 30 seconds. No waiting days for results.

Privacy First

Photos processed securely and never stored. Your images are never used for AI training.

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RapidSubs

RapidSubs

React Native • Local ML

Professional AI subtitles.
On-Device AI. 100% Offline.

Cross-platform mobile app (iOS & Android) for automated video captions. Built with React Native, utilizing local AI models for fast, offline transcriptions.

13,000+ Downloads

Cross-Platform

Single codebase deployed to both iOS and Android with native performance.

On-Device AI

Uses local transcription models for instant subtitle generation. Your videos never leave your device.

FFmpeg Integration

Complex video processing and frame-perfect text overlay rendering.

Trendy Styles

Eye-catching subtitle styles optimized for TikTok, Reels, and YouTube Shorts.

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