Available for senior & staff iOS roles

Hi, I'm Deepak Singh.

Principal Mobile Engineer · iOS & React Native

12+ years shipping production iOS apps — from AI voice systems and on-device LLMs to BLE/IoT and consumer apps with millions of users.

Noida, India Instant Systems, Inc. 12+ yrs experience
Deepak Singh
📱 6 apps live
147K+ ratings
12+
Years building iOS
6+
Apps shipped to App Store
5M+
Users reached
147K+
App Store ratings on shipped work
Live on the App Store

Apps I've shipped

Selected iOS apps spanning healthcare, AI, IoT, audio, and consumer rewards. All currently available on the App Store.

Sully.ai icon
Sully.ai
Medical AI assistant
★★★★☆ 4.0 · Medical

All-in-one AI platform automating clinical workflows. I lead iOS for audio recording, PCM streaming, realtime speech-to-text, translation, and OpenAI voice integration.

SwiftSwiftUIAVFoundationOpenAIWebSockets
View on App Store →
Most popular
Swagbucks icon
Swagbucks
Surveys for Money
★★★★☆ 4.4 · 147,734 ratings

Consumer rewards platform with 5M+ users. Built and maintained iOS apps spanning video streaming, surveys, feedback, and a B2B advertising framework distributed to partners.

SwiftObjective-CVIPERVideo StreamingB2B SDK
View on App Store →
WiSA App icon
WiSA App
Wireless audio control
★★★★★ 5.0 · Lifestyle

Manage and optimize WiSA HT speakers, SoundSend, and Dolby Atmos audio systems. Built BLE and SwiftUI-based control workflows for ESP32 microcontrollers and WiSA transmitters.

SwiftUIBLEESP32IoT
View on App Store →
SmartTagIt icon
SmartTagIt
Workplace safety IoT
★★★★☆ 4.1 · 17 ratings

IoT-driven workplace safety platform. Engineered offline-first workflows recording millions of sensor data points per day and uploading to cloud streaming pipelines.

SwiftRealmBackground UploadsData Pipelines
View on App Store →
Clove Doctor icon
Clove Doctor
Dental practice management
★★★★★ 4.6 · 19 ratings

Doctor-facing app for Asia's largest dental chain. Built socket-based realtime communication, Core Data persistence, secure cloud file storage, and multi-clinic scheduling.

SwiftMVVMCore DataSockets
View on App Store →
Clove Patient icon
Clove Patient
Patient-facing dental care
★★★★★ 5.0 · 5 ratings

Patient-facing companion to Clove Doctor. Built appointment booking, secure file uploads, REST integration, and offline caching for the consumer experience across Indian metros.

SwiftUIKitRESTOffline-first
View on App Store →
Career

Experience

Twelve years across consumer, healthcare, IoT, and AI — from individual contributor to engineering leadership.

Oct 2021 — Present
4 yrs 8 mos

Principal iOS Engineer

Instant Systems, Inc.Noida · Hybrid

Lead the iOS practice across two flagship products — Sully.ai (AI clinical assistant) and WiSA (wireless audio hardware) — owning team direction, technical architecture, and stakeholder partnership end-to-end.

  • Lead the Sully.ai iOS team of 3 — own roadmap prioritization, release planning, and stakeholder alignment. Decide what ships each cycle based on customer impact and engineering risk; close the loop with product, design, backend, and clinical operations.
  • Hired to fix Sully.ai's critical audio-corruption issue — shipped the fix. Rebuilt the audio capture and PCM streaming layer (AVAudioEngine + WebSockets) to deliver clean recordings into the OpenAI realtime transcription, translation, and clinical-note pipeline.
  • Built a reusable Swift BLE framework for WiSA (IC) — abstracts ESP32 microcontroller and WiSA transmitter communication into a clean API. Powers the iOS app that controls WiSA-ready hardware across 40+ audio brands including Bang & Olufsen, Harman Kardon, Klipsch, and LG.
  • Client-facing technical lead — run discovery and architecture conversations directly with WiSA stakeholders. Translate audio-hardware constraints into mobile workflows and push back on scope when timelines aren't realistic.
  • Cut release prep from 1+ hour of manual work to a single-click deploy by automating signing, TestFlight, and App Store delivery via Fastlane + GitHub Actions.
  • Established production observability — introduced LogRocket + Firebase structured logging, audio-pipeline instrumentation, and a triage rotation that surfaces issues before users report them.
  • Standardized AI-augmented workflows (Cursor, Claude, MCP) across the iOS team — accelerating code review, debugging, and documentation.
SwiftSwiftUIAVFoundationOpenAIWebSocketsPCM StreamingTwilioBLEESP32VIPERClean ArchitectureFirebaseFastlaneReact Native
Oct 2017 — Dec 2021
4 yrs 3 mos

Senior iOS Developer

Instant Systems, Inc.Noida

Took two products from zero to App Store while growing from individual contributor to team lead — culminating in managing a cross-platform mobile team and owning client relationships.

  • FactorLab / SmartTagIt — built and led mobile (iOS + Android). Took SmartTagIt from zero to App Store as the iOS owner, then expanded into managing a 3-person cross-platform mobile team. Ran planning, code review, hiring input, and direct client communication.
  • IoT data pipeline at scale — engineered offline-first iOS workflows capturing millions of sensor data points per day with background uploads to cloud streaming infrastructure. Chose Realm over Core Data after benchmarking — write-heavy sensor data made the difference.
  • Clove Dental — shipped Patient & Doctor apps from scratch. Owned the full lifecycle: architecture, REST + socket-based realtime communication, Core Data persistence, secure cloud file storage, App Store submission, and post-launch iteration. Apps power Asia's largest dental chain.
  • Technical voice in client meetings — defined scope, estimated, surfaced risk early, and proposed alternatives when requirements clashed with mobile platform realities.
  • Built patterns that outlived the project — reusable networking, caching, and crash-debugging conventions adopted as the default starting point for new iOS work.
SwiftUIKitCore DataRealmMVVMSocketsBackground UploadsFirebase
Jan 2014 — Nov 2017
3 yrs 11 mos

Sr. iOS Developer

TechAheadNoida · On-site

Contributed to Swagbucks (5M+ users) and reusable framework components spanning video streaming, surveys, feedback, advertising monetization, and partner integrations.

  • Developed and maintained multiple production iOS applications using Swift, UIKit, Objective-C, VIPER, REST APIs, and iOS SDK frameworks.
  • Built and optimized video streaming workflows for high-volume media consumption — improving playback experience, loading performance, and stability.
  • Designed feedback and survey features using VIPER, improving user interaction and structured data collection.
  • Developed and maintained an advertising iOS framework distributed to B2B partners for monetization integrations.
  • Built reusable UI components, networking layers, and shared utilities to support faster feature development across multiple apps.
SwiftObjective-CUIKitVIPERVideo StreamingB2B SDK
Toolkit

Skills

What I reach for day-to-day — sharpened over a decade of production iOS work.

🧩

Languages & Frameworks

Swift SwiftUI UIKit Objective-C React Native TypeScript Expo Expo Modules AVFoundation Combine Core Data Realm
🏛️

Architecture

Clean Architecture MVVM VIPER MVC Coordinator Dependency Injection Modular Design
🤖

AI & Realtime

OpenAI APIs On-device LLMs (GGUF) SFSpeechRecognizer PCM Streaming WebSockets Twilio Prompt Design
📡

IoT & Hardware

BLE ESP32 WiSA Background Uploads Sensor Pipelines Offline-first
🚀

Release & DevOps

GitHub Actions Fastlane TestFlight App Store Connect Firebase LogRocket XCTest

Productivity & AI Tooling

Cursor Claude Code MCP Workflows Code Review at scale Mentoring
Background

Education

Master's in Computer Science

Graphic Era University
2011 — 2014
Let's work together

Looking for a Principal / Staff iOS Engineer?

I'm open to senior iOS, mobile architecture, and engineering leadership roles. Happy to talk about AI-powered mobile, BLE/IoT, healthcare, or anything ambitious.