AI & LLM5 WeeksiOS • Android

    Nest AI: HIPAA-Compliant Pediatric Guidance & Milestone Companion

    Built a privacy-first parenting companion with local encryption, interactive developmental milestone tracking, and secure AI-assisted pediatrician consultations.

    Client

    MetaSense Healthcare Inc.

    Role

    Senior Flutter Engineer & Security Lead

    Timeline

    5 Weeks

    Platforms

    iOS, Android

    App StoreGoogle Play
    Nest AI Production App Mockup

    AES-256

    Encryption

    <600ms

    Inference Latency

    99.9%

    Crash-Free

    HIPAA

    Data Compliance

    The Core Engineering Challenge
    • Healthcare and child data requires strict HIPAA compliance and zero plaintext medical history stored in unencrypted third-party clouds.
    • Parents needed instant answers to urgent pediatric queries without enduring clinical response delays or confusing medical jargon.
    • Milestone tracking graphs required dynamic calculation against standardized WHO pediatric percentiles.
    Technical Solution & Implementation
    • Engineered an on-device encrypted Hive database using AES-256 encryption keys secured inside iOS Keychain and Android KeyStore.
    • Built a secure cloud proxy gateway that anonymizes all PII (Personally Identifiable Information) before invoking OpenAI LLM endpoints.
    • Created dynamic interactive growth chart widgets calculating weight, height, and motor development against standardized pediatric data curves.
    • Configured automated scheduled reminder notifications for vaccination appointments and pediatric check-ins.
    Technical Architecture Highlights

    Zero-Knowledge Local Storage

    All chat logs, child medical records, and photos are encrypted client-side using hardware-backed cryptographic keys.

    PII Sanitization Gateway

    Cloud Functions proxy that regex-sanitizes names, dates, and locations prior to dispatching prompts to LLM endpoints.

    Reactive Child Growth Engine

    Mathematical computation layer rendering fluid SVG percentile curves without bogging down the main UI thread.

    Technologies & Tools Used
    FlutterDartRiverpodChatGPT APIFirebase Cloud FunctionsAES-256 CryptographyHive Encrypted BoxFL Chart
    Measurable Business & Tech Results
    • 100% compliance with mobile healthcare privacy standards and local data isolation.
    • Average conversational response time reduced from 3.2s to 550ms using streaming token decoding.
    • 5-star App Store user rating for intuitive milestone visualization and UI polish.
    Built a privacy-first parenting companion with local encryption, interactive developmental milestone tracking, and secure AI-assisted pediatrician consultations.

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