iOS Developer

IOS - BLE

Experience: 8 - 18 yrs

Budget: 1.4

Work Mode

Office, 

Location

India - Trivandrum

Job Description

Key Responsibilities

Native iOS development using Swift and the current iOS SDK

Implement new features based on product requirements

Maintain existing applications, including bug fixes and performance optimization

Integrate with backend APIs (REST / GraphQL) and cloud services (AWS-hosted)

Must have: Implement device communication over BLE (CoreBluetooth) — BLE queue management, scanning and scan filtering, ciphering, GATT services/characteristics, and hardware communication protocols for smart devices

Implement UI/UX following design specifications and Apple Human Interface Guidelines

Manage app store submission, builds, and release management

Write unit and UI tests to minimize defects and reproduce intermittent issues

Diagnose and resolve hard-to-reproduce production issues using analytics and crash data

Conduct code reviews and maintain technical documentation

Collaborate closely with the Cloud/Web team on API integration

Required Skills & Experience

Core iOS & Language

Expert-level native iOS development (Swift, current iOS SDK)

Strong command of both SwiftUI and UIKit, and sound judgment on when to use each

Concurrency: async/await, Combine and GCD; thread-safety and race-condition handling; tracing and preventing memory leaks

Architecture & Design

MVVM and Clean Architecture in depth, including the domain / Use Case layer

Dependency Injection; designing reusable UI and functional components across the app

APIs, Networking & Security

RESTful and GraphQL integration (Alamofire); awareness of SOAP and its trade-offs

API caching, request optimization (reducing redundant calls), and timeout configuration

Token-based auth: JWT (payload/claims), refresh tokens and expiry handling, SSO, Cognito or similar

Certificate / SSL pinning and certificate renewal; secure credential storage (Keychain)

Data & Persistence

Persistence mechanisms (Keychain, UserDefaults, Core Data / local DB) and secure storage of sensitive data

Handling data migration and integrity issues across app updates

BLE / Connected-Device Communication (core to the role)

Hands-on CoreBluetooth: full BLE flow (scanning → connection → service discovery → communication → disconnection)

BLE queue / operation management, scan filtering, GATT/ATT, services and characteristics

MTU / packet-size handling, response parsing, acknowledgements and reliable byte-level transfer, exponential retry and reconnection

Ciphering and encrypted device communication; OTA firmware-update considerations

Notifications, Analytics & Observability

Push notifications (APNS): payload structure, parsing, and payload-driven navigation

Analytics and crash reporting (Firebase / Crashlytics); using analytics and logs to debug elusive production issues

Quality, Tooling & Delivery

CI/CD pipelines for mobile (e.g., Fastlane); app-store submission (TestFlight, Apple App Store)

Build / dependency tooling: Xcode, CocoaPods, Swift Package Manager

Testing: XCTest, XCUITest; a clear view of meaningful coverage and which layers to test

Localization implementation and management (incl. tooling such as Phrase); awareness of iOS/Android localization differences

Preferred / Nice to Have

Experience with IoT / connected-device companion apps (strongly preferred)

Experience with OTA firmware update flows

Location features: Geofencing (background and terminated-state behaviour), MapKit

Siri Shortcuts, AWS service integration, in-app chat SDKs

Designing a shared codebase across iOS and macOS

Practical use of AI-assisted development tools in day-to-day workflow

Good to have: B1 visa

Technical Screening Focus Areas

Candidates should be prepared to go deep, with real implementation detail rather than theory, on the following:

Project walkthroughs — architecture decisions, individual contributions, and real production challenges and how they were resolved

BLE end-to-end — flow, GATT and characteristics, MTU / packet size, reliable transfer and acknowledgements, retry and reconnection, max simultaneous device connections

Concurrency — async/await vs Combine, thread-safety, race conditions, memory-leak tracing

Architecture — MVVM / Clean, Use Cases, Dependency Injection, reusability

Networking & security — REST/GraphQL (and SOAP), caching and optimization, JWT and refresh tokens, SSO, SSL pinning and certificate renewal

Persistence — Keychain vs UserDefaults, secure storage, data migration across app updates

Supporting areas — APNS payload handling, analytics-led production debugging, localization, and unit-testing strategy