about
Senior iOS engineer with 15+ years shipping consumer and enterprise applications across the Apple ecosystem. Work spans CoreBluetooth peripheral integration, real-time signal processing, HIPAA-compliant healthcare, FDA-adjacent drug monitoring, offline-first payment systems, and white-label SDK architecture. Led Doximity’s (NYSE: DOCS) flagship v5.0 release to 80% of U.S. physicians, joined Square (NYSE: XYZ) via the Pins acquisition, and engineered the iOS platform behind Breathometer’s $1M Shark Tank investment. 163K+ reputation on Stack Overflow, with answers reaching 22M+ developers.
core strengths
Durable Engineering
Production systems engineered for the long haul. Explicit module boundaries, protocol-oriented APIs, and dependency graphs that favor replaceability over cleverness — so codebases stay legible and extensible across team transitions, framework churn, and platform evolution.
Full-Stack iOS Depth
From CoreBluetooth GATT profile design and real-time sensor streaming through MVVM/TCA state management and production SwiftUI — with offline-first sync engines, modular SPM architectures, CI/CD pipelines, and white-label SDKs deployed at top-tier institutions along the way.
Ship Under Constraints
HIPAA-compliant healthcare, FDA-adjacent drug monitoring, and real-time payment processing. Environments with auditable interaction logging, regulated data handling, and failure modes that directly affect patient care or financial outcomes — where reliability is table stakes and correctness under adversarial conditions is the actual job.
career highlights
Breathometer
$1M Shark Tank Deal
Founding iOS engineer — solo-built the application, CoreBluetooth stack, and BAC signal processing pipeline behind the product’s Shark Tank investment (Season 5, all five Sharks).
Square
Acquired by Square
Built Pins end-to-end — Core Data sync, custom map clustering, and geofenced delivery. Promoted post-close to the Register Foundation team.
Doximity
Flagship iOS Release
Led the v5.0 release to 80% of U.S. physicians. Architected the white-label SDK deployed at Stanford, Harvard, and Penn.
JSwipe
Match Group Acquisition
Built the real-time matching engine, WebSocket chat, and StoreKit purchase flow. Product scaled to millions of users before the acquisition.
notable-projects
DoximityNYSE: DOCS
Professional network reaching 80% of U.S. physicians. Led the v5.0 platform release — Search, DocMail, DocFax, and physician forums — and architected the white-label SDK deployed at Stanford, Harvard, Penn, UCSF, and UCSD. Established the iOS architecture standards adopted company-wide.
Obj-CUIKitCore DataREST APIsWhite-Label SDK
Amion350+ Health Systems
Clinician scheduling for 200K+ providers across 350+ health systems. Delivered HIPAA-secure messaging, on-call shift management, and offline-first sync for a product whose failure modes directly affect patient care — unavailability at 3 AM has downstream clinical consequences.
SwiftUIKitOffline SyncPush NotificationsHIPAA
BreathometerIoT / Hardware
Consumer Bluetooth breathalyzer that secured a $1M Shark Tank investment (Season 5, all five Sharks). Solo-built the iOS application, CoreBluetooth GATT stack, real-time BAC signal processing pipeline, and a transport-agnostic communication layer that dispatched I/O to the connected hardware variant — Bluetooth or audio-jack — behind a single interface.
Obj-CCoreBluetoothAudio I/OSignal ProcessingHardware Integration
ShopKeep POSAcq. by Lightspeed
iPad point-of-sale platform serving tens of thousands of small businesses. Built the offline-first transaction engine with durable local queuing, conflict-resilient sync, and deterministic recovery flows — so sales complete reliably regardless of network conditions.
SwiftCore DataPayment APIsOffline Sync
JSwipeAcquired by Match Group
Dating application that scaled to millions of users prior to its acquisition by Match Group. Built the real-time matching engine, WebSocket chat protocol, StoreKit purchase flow, and push-notification-driven engagement system — each load-bearing component of a product whose peak-hour reliability directly drove conversion.
SwiftWebSocketsStoreKitPush NotificationsCore Location
Galafold® MyDayFDA-Adjacent
Rare disease drug management application for Amicus Therapeutics (NASDAQ: FOLD). HIPAA-compliant and FDA-adjacent: WCAG-compliant accessibility throughout, tamper-resistant interaction logging, and reminder/adherence workflows designed to align with clinical protocols.
SwiftHealthKitLocal NotificationsAccessibilityHIPAA
ScreenshopAcquired
Visual fashion search — snap any outfit, find shoppable matches. Built the iOS capture pipeline end-to-end: permission-aware camera access, real-time capture UX with framing guides, and the product-matching results interface.
SwiftUIKitCamera APIsPhotos FrameworkPermissions
Square RegisterNYSE: XYZ
Square’s flagship point-of-sale application. Joined via acquisition; promoted to the Register Foundation team, owning core iOS infrastructure, shared libraries, and build tooling across the organization. Cut CI build times 30%+ via parallelized builds, test sharding, and caching. Prototyped Square Invoices at Hack Week and shepherded it through to production.
Obj-CSwiftJenkins CIModular ArchitectureInternal Tools
BottleshakeB2B Platform
Brand-influencer marketplace with real-time campaign matching. Built LinkedIn OAuth onboarding, the match-scoring algorithm, and the full engagement pipeline. Led a 5-person cross-functional team owning iOS, web, and the backend API.
SwiftUIKitREST APIsLinkedIn OAuthNode.js
GiftikiAcquired by LaunchRock
Social gifting application featured in Apple’s “New & Noteworthy.” Built gift discovery, social graph integration, and push-driven engagement flows. Acquired by LaunchRock.
Obj-CUIKitPush NotificationsSocial APIs
PinsAcquired by Square
Location-based social discovery application acquired by Square. Built custom map clustering optimized for dense urban data, bidirectional Core Data sync with conflict resolution, and geofenced content delivery.
Obj-CCore DataMapKitCore Location
Titanium MobileOpen Source
Cross-platform mobile framework used by thousands of production applications. One of four core engineers on the Obj-C/JavaScript runtime bridge — responsible for exposing native iOS APIs to JavaScript and reconciling reference-counting semantics across the runtime boundary.
Obj-CJavaScriptRuntime BridgeNative Modules
experience
Independent Practice — Principal iOS Engineer & Technical Advisor
Embedded consulting across fintech, healthcare, social, IoT, and AI
- Embedded as senior engineer across 15+ clients — shipping production iOS in fintech, healthcare, social, IoT, and AI.
- Technical advisor to a venture-backed stealth startup working at the intersection of AGI, payments, and vertical SaaS.
- Architected and shipped end-to-end iOS products from founding-stage prototypes through mature production releases.
15+ clientsConsulting PracticeAdvisor
Bottleshake — Engineering Lead
B2B networking platform connecting brands with influencers
- Joined as engineering lead, building and managing a 5-person cross-functional team owning the full product stack (iOS, web, backend API).
- Shipped Login with LinkedIn OAuth, cutting onboarding friction and doubling activation rates.
- Led a full UI/UX redesign and rebuilt the match-scoring algorithm around weighted signal integration and deterministic ranking, reducing churn across both sides of the marketplace.
Full-stack lead5-person team
Square (now Block) — iOS Platform Engineer, Square Register Foundation Teamvia Pins Acquisition
Acquired via Pins → promoted to Register Foundation team
- Built Pins end-to-end — Core Data persistence, sync engine, and custom map clustering. Acquired by Square; promoted post-close to the Register Foundation team.
- Owned core libraries, tooling, and shared infrastructure behind Square’s flagship POS application as part of the Register Foundation team.
- Reduced CI build times by more than 30% through parallelized builds, test sharding, and caching — saving hundreds of engineering-hours per quarter.
- Prototyped Square Invoices at Hack Week; shepherded it through to production.
Platform EngineeringJoined via Acquisition
Breathometer — iOS Engineering Lead
Consumer Bluetooth breathalyzer — featured on ABC’s Shark Tank
- Founding iOS engineer — solo-built the application, CoreBluetooth stack, and BAC signal processing pipeline.
- Designed custom GATT profiles and real-time sensor streaming, turning raw Bluetooth signals into accurate BAC readings.
- Built a transport-agnostic communication layer that dispatched I/O to the connected hardware variant — Bluetooth or audio-jack — behind a single interface.
- Product secured $1M from all five Sharks on ABC’s Shark Tank (Season 5).
Founding EngineerHardware + Software
Doximity — Lead iOS Engineer
Professional network for physicians — now NYSE: DOCS
- Led v5.0 — the platform release that brought Search, DocMail, DocFax, and physician forums to 80% of U.S. physicians.
- Architected a white-label SDK deployed at Stanford, Harvard, Penn, UCSF, and UCSD — supporting per-institution theming, authentication, and data partitioning from a single codebase.
- Established iOS architecture patterns and module-boundary conventions that were adopted across the team as it scaled.
v5.0 Release LeadNYSE: DOCS
Earlier Roles — Giftiki, Appcelerator, Freeverse
- Giftiki (Lead iOS) — Built the social gifting application featured in Apple’s “New & Noteworthy.” Acquired by LaunchRock.
- Appcelerator (iOS Platform) — One of four core engineers on the Titanium Mobile cross-platform framework. Owned the Obj-C/JavaScript runtime bridge: exposing native iOS APIs to JavaScript, marshalling values across the boundary, and reconciling reference-counting semantics between manual retain/release and the JS garbage collector.
- Freeverse (Software Engineer) — Shipped two commercial iOS game titles during the early iPhone OS era.
Apple FeaturediOS since 2009
technical-skills
ExpertAdvancedFamiliar
Languages
SwiftObjective-CTypeScript / JavaScriptPythonRuby
Architecture
MVVM / TCAProtocol-Oriented DesignModular Swift PackagesState Management
Apple Platforms
UI Frameworks (UIKit, SwiftUI)CoreBluetooth & BLE (GATT)Concurrency & Reactive (Combine, async/await)Data Persistence (SwiftData, Core Data)System Frameworks (MapKit, HealthKit, AVFoundation)Push Notifications & StoreKit
Engineering Practices
Testing (XCTest, UI, Snapshot)Xcode & InstrumentsCI/CD (Fastlane, GitHub Actions)Networking (REST, WebSockets, GraphQL)
AI
Claude CodeLLM IntegrationPrompt Engineering
community
Contributing to the iOS and broader developer community since 2010 — Stack Overflow answers that still surface in search a decade later, and sustained open-source work across iOS tooling, frameworks, and cross-platform runtime bridges.
education
Lev Academic Center (Jerusalem College of Technology)— Computer Science
certifications
Newton Academy iOS Developer
Arc Certified Remote Developer
lets-talk
15+ years shipping iOS applications across consumer, enterprise, healthcare, and hardware-integrated domains. If you’re building something for iOS and think I could help, I’d love to hear about it.