Mohit Kumar Singh

Senior iOS Engineer

Swift · SwiftUI · UIKit · MVVM · CI/CD

Senior iOS Engineer with 6+ years and 12+ production apps shipped across healthcare, banking/fintech, e-commerce, AI and lifestyle — including two products designed, built and shipped solo, one of them live across 175 App Store storefronts. I own the full iOS delivery lifecycle: architecture, feature shipping, CI/CD automation, and App Store plus Apple Enterprise distribution.

mohit.singh.ectech@gmail.com LinkedIn Noida, Uttar Pradesh, India

Years building iOS

12+

Production apps shipped

175

App Store storefronts live

Products built solo

Own products

Products I design, build and ship myself.

End to end — product definition, architecture, the native app, the backend, release and monetization.

EvenSteven

Live on App Store iOS · Android in progress

Cross-platform expense-splitting app — “Split anything. Stay friends.” Equal, custom and itemized splitting, groups with QR and smart-link invites, live balances with smart settle-up, recurring splits, and a spending-insights suite.

Highlights

Built the native iOS app (Swift, SwiftUI, SwiftData) with an on-device + cloud receipt-scanning pipeline — VisionKit OCR, a custom spatial line-item parser, and Apple FoundationModels — enabling item-by-item bill splitting from a photo.
Built a multi-provider AI engine (Cloud Functions router over Gemini + Groq) with per-feature quotas, policy control and graceful fallback, giving natural-language spending insights without vendor lock-in.
Launched RevenueCat monetization across 175 App Store storefronts with purchasing-power-parity pricing, plus UPI-based in-app settle-up for the India market.
Built the Firebase backend (Auth, Firestore, Cloud Functions, FCM/APNs, App Check) with Cloudflare R2 signed-URL media storage, and a SwiftUI admin console for live remote config — feature flags, paywall, regions, AI policy and forced updates.

SwiftSwiftUISwiftData VisionKitFoundationModels FirebaseCloud Functions RevenueCatCloudflare R2

App Store → Google Play → Product page →

WLB

In development iOS · Android

A multi-event budget, guest and gift planner built for the real complexity of Indian weddings — multiple ceremonies under one event, shagun customs on the guest list, joint budgeting across families, and group gift-giving.

Highlights

A pure budget allocator that turns a total into a percentage split across renameable categories, with auto-allocate, lock-and-redistribute and recommend operations — unit-tested in a shared domain package.
Budget governance: a contingency buffer that tops up an over-running category, and optional hard caps that block over-budget spend outright.
Five-role access control (owner, admin, editor, viewer, gift-contributor) resolved through a single capabilities value the whole UI gates on, plus a preview-as-role mode.
Event-centric Firestore where clients may never write membership — seven Cloud Functions do it atomically with the Admin SDK, covering invite claim/decline, role change and account deletion.
Money stored as integer paise throughout, formatted whole-rupee with lakh/crore grouping. Local-first on both platforms, with 20 security-rules tests written as the attacks they prevent.

SwiftSwiftUISwiftData KotlinJetpack ComposeRoom FirebaseCloud Functions

Feature breakdown →

Invocera

In development iOS · Android · macOS · Web

Invoicing and expense tracking for freelancers and solo businesses — branded invoices, expenses, mileage, estimates, recurring billing and payment reminders across four surfaces on one shared backend.

Highlights

One backend serving four clients: SwiftUI + SwiftData on iOS, Compose + Room on Android, SwiftUI on macOS, and Next.js on the web.
All privileged work behind Cloud Functions — PDF generation, email send, recurring and overdue crons, and the RevenueCat webhook.
Binaries in Cloudflare R2 with Firestore holding only the object key; R2 keys are never handed out, only short-lived signed URLs minted server-side.
Owner-scoped Firestore rules, a custom admin claim with MFA for the admin console, and an audit collection.

SwiftSwiftUIKotlin Next.jsTypeScript FirebaseCloudflare R2RevenueCat

Experience

Professional experience.

iOS Engineer — Self-employed

Independent · Noida, India

Aug 2026 – Present

Building and shipping independent iOS products end to end — product definition, architecture, native app, backend, release and monetization.

Key apps: EvenSteven — live on the App Store, Android in progress · WLB — in development · Invocera — in development.

Senior iOS Developer

Adventure India Journey Pvt Ltd · Delhi, India

Aug 2024 – Jul 2026

Owned the iOS codebase end to end for the company's travel platform — architecture, feature delivery and App Store release cycles.
Shipped offline-first architecture with local caching, enabling full itinerary and trip-content functionality with zero connectivity — critical for travelers in transit and remote areas.
Migrated local persistence to SwiftData, removing hand-written boilerplate and giving SwiftUI views type-safe, reactive reads.
Partnered with design and product in Agile delivery, translating Figma specs into adaptive UI across iPhone and iPad size classes.

Key app: Adventure — travel and trip-planning app for discovering, booking and managing adventure experiences and itineraries.

Senior Software Engineer (iOS)

Nickelfox Technologies Pvt Ltd · Noida, India

Jun 2021 – Aug 2024

Delivered 7+ client-facing iOS apps across healthcare, banking, AI and wellness — public App Store products alongside internal and staff apps — including a banking + healthcare platform consuming banking-as-a-service APIs for in-app account opening and money transfers.
Architected reusable MVVM components and shared UI/networking layers, reducing per-project setup time and enabling rapid multi-client delivery.
Automated the release pipeline with Fastlane, Bitrise and XCTest unit/UI coverage on core flows, eliminating manual archive-and-upload builds and enabling on-demand deployments.
Ran dual-track distribution — public App Store releases alongside an Apple Enterprise (In-House) account for internal and staff apps — owning signing, provisioning and rollout.
Integrated ChatGPT/LLM capabilities and persona-driven chat experiences into consumer apps.

Key apps: Agalia (healthcare + banking) · Ele (AI chat) · PlantAI (plant identifier) · Silk + Sonder · Realize (daily affirmations) · Oklahoma Fire Service apps · Cooper's Hawk.

Software Engineer (iOS)

Uniqubic Solutions Pvt Ltd · Gurugram, India

Feb 2021 – Jun 2021

Built an iOS companion app for a major online game, focused on fast navigation across large reference datasets and engaging UI.
Implemented RESTful API integration with local caching for fast, offline-friendly access to game data.

Key app: SOT: Sea of Thieves (Companion) — unofficial companion app giving players guides, references and tools.

Software Engineer (iOS)

SD Global Services India Pvt Ltd · Noida, India

Mar 2020 – Feb 2021

Built and maintained on-demand marketplace iOS apps for both sides of a two-sided platform, connecting customers with service providers in real time.
Shipped location-aware booking, push notifications and scheduling flows using Core Location and APNs.

Key apps: Soothe: In-Home Massage · Soothe for Therapists.

Technical skills

What I build with.

iOS platform: Swift, Objective-C, SwiftUI, UIKit, Combine, Swift Concurrency (async/await, actors), GCD, SwiftUI ↔ UIKit interop
Architecture: MVVM, MVC, VIPER, Clean Architecture, protocol-oriented programming, offline-first design, dependency injection
Data & networking: SwiftData, Core Data, Realm, Codable, local caching, URLSession, Alamofire, RESTful APIs, JSON parsing, WebSocket
Apple frameworks: Core Location, MapKit, VisionKit, Push Notifications (APNs), Auto Layout, adaptive UI, Lottie, Apple FoundationModels (on-device AI)
Testing & CI/CD: XCTest, UI Tests, Quick & Nimble, Fastlane, Bitrise, Xcode Cloud, TestFlight, App Store Connect, Apple Enterprise (In-House) distribution
Backend & integrations: Firebase (Auth, Firestore, Cloud Functions, FCM, App Check), Banking-as-a-Service (Treasury Prime iFrame, client-side encryption), RevenueCat, ChatGPT / LLM APIs
Tooling: Xcode, Git, Bitbucket, SourceTree, JIRA, Confluence, Figma, Agile / Scrum
Also: Kotlin, Jetpack Compose (Android builds of my own products)

Education

Education.

B.Tech, Electronics & Communication Engineering

IMS Engineering College, Ghaziabad, India · 71%

2010 – 2014