About
15+ years building iOS products that ship to millions.
Founding engineer at Breathometer — built the platform behind a $1M Shark Tank deal with all five Sharks.
Acquired into Square via Pins, promoted to the Square Register Foundation team powering the flagship POS app. Flagship iOS release at Doximity to 100K+ physicians.
163K+ Stack Overflow reputation — top 0.01%, ~22M people reached.
Craft & Depth
From Bluetooth protocols to polished UI. Low-level systems to performance-critical pipelines.
Ownership & Leadership
Leading teams, mentoring engineers, owning products from architecture through launch.
Systems Thinking
Platform tooling, offline-first architectures, and compliance frameworks built for scale.
Notable Projects
DoximityNYSE: DOCS
Professional network for 100K+ physicians. Led the iOS v5.0 platform release and architected the white-label SDK deployed at Stanford, Harvard, and Penn.
Obj-CUIKitCore DataREST APIsWhite-Label SDK
Amion350+ Health Systems
Clinician scheduling platform serving 200K+ providers. Built on-call, shift, and rotation schedule management with HIPAA-secure messaging and offline calendar sync.
SwiftUIKitOffline SyncPush NotificationsHIPAA
BreathometerIoT / Hardware
Bluetooth breathalyzer that secured a $1M Shark Tank deal with all five Sharks. Solo-built the iOS app, CoreBluetooth GATT stack, and real-time BAC signal processing pipeline.
Obj-CCoreBluetoothSignal ProcessingHardware Integration
ShopKeep POSAcq. by Lightspeed
iPad POS serving tens of thousands of small businesses. Engineered the transaction engine with persistent local-first storage for uninterrupted operation.
SwiftCore DataPayment APIsOffline Sync
JSwipeAcquired by Match Group
Dating app that scaled to millions of users before acquisition. Engineered real-time matching engine, WebSocket chat infrastructure, and StoreKit purchase flow.
SwiftWebSocketsStoreKitPush NotificationsCore Location
Galafold® MyDayFDA-Adjacent
Rare disease drug management app for Amicus Therapeutics (NASDAQ: FOLD). HIPAA-compliant, FDA-adjacent, with full regulatory audit trail and accessibility mandates.
SwiftHealthKitLocal NotificationsAccessibilityHIPAA
ScreenshopAcquired
AI-powered fashion discovery—screenshot any outfit, get shoppable results instantly. Architected the camera capture pipeline, on-device Core ML inference, and product matching UI.
SwiftVisionCore MLCamera APIsUIKit
Square RegisterNYSE: XYZ
Square’s flagship POS app. Joined via acquisition, promoted to the Register Foundation team owning core iOS infrastructure. Prototyped Square Invoices at Hack Week—shipped to production.
Obj-CSwiftJenkins CIModular ArchitectureInternal Tools
BottleshakeB2B Platform
Brand-influencer marketplace with real-time campaign matching. Engineered LinkedIn OAuth onboarding, algorithmic match scoring, and a full-stack engagement pipeline.
SwiftUIKitREST APIsLinkedIn OAuthNode.js
GiftikiAcquired by LaunchRock
Social gifting app featured in Apple’s “New & Noteworthy.” Acquired by LaunchRock.
Obj-CUIKitPush NotificationsSocial APIs
PinsAcquired by Square
Location-based social discovery app whose engineering quality led directly to acquisition by Square. Custom map clustering, Core Data sync engine, and geofenced content delivery.
Obj-CCore DataMapKitCore Location
Titanium MobileOpen Source
Cross-platform mobile framework. One of four core engineers on the Obj-C/JS runtime bridge powering thousands of production apps.
Obj-CJavaScriptRuntime BridgeNative Modules
Experience
Independent Practice — Principal iOS Engineer & Technical Advisor
Embedded engagements across fintech, healthcare, social, IoT, and AI
- Embedded as senior engineer with 15+ clients shipping production iOS across fintech, healthcare, social, IoT, and AI
- Currently serving as technical advisor to a venture-backed stealth startup (AGI + payments + vertical SaaS)
- Delivered production systems spanning real-time chat, payment processing, HIPAA-compliant healthcare, Bluetooth hardware, and on-device ML
15+ clientsConsulting PracticeAdvisor
Bottleshake — Engineering Lead
B2B networking platform connecting brands with influencers
- Hired by CEO as engineering lead—built and managed 5-person cross-functional team owning the full product stack (iOS, web, backend API)
- Engineered Login with LinkedIn integration that significantly increased new user signups
- Spearheaded UI/UX redesign and matching algorithm overhaul that meaningfully reduced churn and increased weekly engagement
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 from the ground up—Core Data persistence, sync engine, custom map clustering. Engineering quality led directly to acquisition by Square
- Post-acquisition, promoted to Square Register Foundation team—owned core libraries, tooling, and shared infrastructure powering the flagship POS app
- Cut CI build times by over 30% through parallelized builds, test sharding, and caching—saving hundreds of engineering-hours per quarter
- Prototyped Square Invoices at Hack Week—shipped to production
Platform EngineeringJoined via Acquisition
Breathometer — iOS Engineering Lead
Consumer Bluetooth breathalyzer — featured on ABC’s Shark Tank
- Founding iOS engineer—built the iOS app, Bluetooth stack, and signal processing pipeline
- Product featured on ABC’s Shark Tank (Season 5)
- Engineered custom CoreBluetooth GATT profiles, real-time sensor streaming, and BAC calculation algorithms
Founding EngineerHardware + Software
Doximity — Lead iOS Engineer
Professional network for physicians — now NYSE: DOCS
- Led development of v5.0—the major platform release. Shipped Search, DocMail, DocFax, and physician forums
- Architected a white-label SDK deployed at Stanford, Harvard, Penn, UCSF, and UCSD; established iOS architecture standards adopted company-wide
v5.0 Release LeadNYSE: DOCS
Earlier Roles — Giftiki, Appcelerator, Freeverse
- Giftiki (Lead iOS) — Built social gifting app featured in Apple’s “New & Noteworthy.” Acquired by LaunchRock.
- Appcelerator (iOS Platform) — One of four core engineers building the Titanium Mobile cross-platform framework (Obj-C/JS runtime bridge).
- Freeverse (Software Engineer) — Shipped two commercial iOS games starting at age 14.
Apple FeaturediOS since 2009
Technical Skills
ExpertAdvancedFamiliar
Languages
SwiftObjective-CTypeScript / JavaScriptPython
Architecture
MVVM / TCAProtocol-Oriented DesignModular Swift PackagesState Management
Apple Platforms
UI Frameworks (UIKit, SwiftUI)Bluetooth & Hardware (CoreBluetooth)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)API Integration (REST, GraphQL)
AI-Augmented Development
Shipping production code and tooling faster with AI-assisted workflows—from architecture to implementation.
AI-Augmented Dev (Claude Code)LLM IntegrationPrompt EngineeringCore ML / On-Device AI
Community
Education
Lev Academic Center (Jerusalem College of Technology)— Computer Science
Certifications
Newton Academy iOS Developer
Arc Certified Remote Developer
Let’s Talk
Building something for iOS? I’d love to hear about it.