AI & LLMiOS · Android5 Weeks

    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.

    RoleSenior Flutter Engineer & Security Lead
    ClientMetaSense Healthcare Inc.
    Timeline5 Weeks
    AES-256Encryption
    <600msInference Latency
    99.9%Crash-Free
    HIPAAData Compliance
    Nest AI Mobile Application Presentation Mockup
    Problem Statement

    The Engineering Challenge

    1

    Healthcare and child data requires strict HIPAA compliance and zero plaintext medical history stored in unencrypted third-party clouds.

    2

    Parents needed instant answers to urgent pediatric queries without enduring clinical response delays or confusing medical jargon.

    3

    Milestone tracking graphs required dynamic calculation against standardized WHO pediatric percentiles.

    Implementation

    What I Built & Delivered

    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.

    System Architecture

    Architectural 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 Employed
    FlutterDartRiverpodChatGPT APIFirebase Cloud FunctionsAES-256 CryptographyHive Encrypted BoxFL Chart
    Measurable Impact

    Engineering & Business 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.

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