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Hi, I’m Karanpreet Singh Purba. I’m a Mobile & Platform Engineer based in Toronto, specializing in the design, architecture, and development of scalable iOS and Android apps in enterprise environments. I focus on secure identity, multi-tenant subscription platforms, and serverless backend architectures on AWS, with deep expertise in native iOS development (Swift, SwiftUI, UIKit) and RESTful API design. I also enjoy mentoring engineers, defining engineering standards, and driving cross-functional technical strategy across mobile and backend teams.\n\nWith 5+ years of hands-on experience across mobile, web, and cloud stacks, I deliver end-to-end solutions, guide architectural decisions, and help teams ship reliable, secure software at scale.…Hi, I’m Karanpreet Singh Purba. I’m a Mobile & Platform Engineer based in Toronto, specializing in the design, architecture, and development of scalable iOS and Android apps in enterprise environments. I focus on secure identity, multi-tenant subscription platforms, and serverless backend architectures on AWS, with deep expertise in native iOS development (Swift, SwiftUI, UIKit) and RESTful API design. I also enjoy mentoring engineers, defining engineering standards, and driving cross-functional technical strategy across mobile and backend teams.\n\nWith 5+ years of hands-on experience across mobile, web, and cloud stacks, I deliver end-to-end solutions, guide architectural decisions, and help teams ship reliable, secure software at scale.

Karanpreet Singh Purba

App Developer, Web Developer, Front-End Developer, +2

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Hi, I’m Karanpreet Singh Purba. I’m a Mobile & Platform Engineer based in Toronto, specializing in the design, architecture, and development of scalable iOS and Android apps in enterprise environments. I focus on secure identity, multi-tenant subscription platforms, and serverless backend architectures on AWS, with deep expertise in native iOS development (Swift, SwiftUI, UIKit) and RESTful API design. I also enjoy mentoring engineers, defining engineering standards, and driving cross-functional technical strategy across mobile and backend teams.\n\nWith 5+ years of hands-on experience across mobile, web, and cloud stacks, I deliver end-to-end solutions, guide architectural decisions, and help teams ship reliable, secure software at scale.…Hi, I’m Karanpreet Singh Purba. I’m a Mobile & Platform Engineer based in Toronto, specializing in the design, architecture, and development of scalable iOS and Android apps in enterprise environments. I focus on secure identity, multi-tenant subscription platforms, and serverless backend architectures on AWS, with deep expertise in native iOS development (Swift, SwiftUI, UIKit) and RESTful API design. I also enjoy mentoring engineers, defining engineering standards, and driving cross-functional technical strategy across mobile and backend teams.\n\nWith 5+ years of hands-on experience across mobile, web, and cloud stacks, I deliver end-to-end solutions, guide architectural decisions, and help teams ship reliable, secure software at scale.

Available to hire

Hi, I’m Karanpreet Singh Purba. I’m a Mobile & Platform Engineer based in Toronto, specializing in the design, architecture, and development of scalable iOS and Android apps in enterprise environments. I focus on secure identity, multi-tenant subscription platforms, and serverless backend architectures on AWS, with deep expertise in native iOS development (Swift, SwiftUI, UIKit) and RESTful API design. I also enjoy mentoring engineers, defining engineering standards, and driving cross-functional technical strategy across mobile and backend teams.\n\nWith 5+ years of hands-on experience across mobile, web, and cloud stacks, I deliver end-to-end solutions, guide architectural decisions, and help teams ship reliable, secure software at scale.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Mobile Application Developer at SailTimer Inc.

November 1, 2025 - April 1, 2026

Led the architectural design and development of a cross-platform mobile SDK ecosystem (iOS & Android) enabling third-party partner applications to securely activate premium subscription features. Defined entitlement validation, authentication standards, and versioned API contracts used across multiple partner applications to ensure long-term SDK compatibility and scalability. Designed and implemented a serverless backend platform using AWS (Lambda, API Gateway, DynamoDB, S3, CloudFront) to support partner onboarding, subscription verification, SDK authentication, and entitlement lifecycle management. Architected secure partner activation workflows binding SDK access to verified app identifiers (bundle ID / package name), enforcing backend-driven authorization and short-lived token validation. Implemented Apple App Store (StoreKit 2) and Google Play Billing verification systems, including webhook handling and subscription state reconciliation across platforms. Established backend archit

Software Developer / Product Lead — Load Board & Operations Platform (Contract) at Singh Brothers Logistics (SBL Logistics)

May 1, 2025 - Present

Leading development of a full-stack logistics load board and dispatch platform, designed to run on private on-prem infrastructure with planned cloud scaling. Architecting a microservices-based system where each service (load lifecycle, carrier onboarding, driver workflow, notifications, and proof-of-delivery) runs as a Docker container on a NAS. Hosting version control, artifact storage, environment configs, and internal CI pipelines on NAS to enable secure intranet-first development. Building web interface with Next.js and companion React Native mobility features for web and mobile. Developing a Kotlin Multiplatform shared module for cross-platform networking and caching using Ktor, Serialization, and Coroutines. Building Node.js RESTful APIs and background workers with Azure AD B2C-based identity for secure multi-tenant access. Designing PostgreSQL schemas with caching and event-based updates for real-time freight visibility and load state transitions. Implementing real-time dashboar

Mobile Application Developer at FGF Brands Inc.

March 1, 2022 - January 1, 2025

Developed and maintained enterprise native iOS applications using Swift and UIKit/SwiftUI, supporting real-time operations, secure authentication flows, offline-first data sync, and background processing. Built and maintained cross-platform mobile applications using React Native and native Android/iOS (Kotlin, Swift, Java), including native module bridging for NFC, sensor access, and background tasks. Integrated Azure AD B2C authentication, Azure Key Vault, and JWT token encryption to ensure secure login and session management. Delivered a real-time operations and incident management app using MongoDB Realm SDK, enabling live task assignments, chat messaging, automated alerts, and dynamic performance dashboards. Designed and developed RESTful APIs using C# and ASP.NET Web API / .NET Core. Implemented GPS route tracking with deep linking, geofencing, and telemetry updates. Implemented barcode/QR scanning for data capture and real-time processing. Developed an IoT-weight monitoring app u

Mobile Application Developer (Contract) at Pearson GTA Limo

March 1, 2020 - January 1, 2022

Designed and developed the company's mobile booking app for Android (Kotlin) and iOS (Swift), enabling ride scheduling, trip history, driver tracking, and payments. Implemented React Native UI components with native bridging for GPS, push notifications, and secure storage. Built RESTful API integrations for scheduling, fare estimation, routing, and real-time status updates. Developed an admin dashboard for dispatch and driver management. Implemented push notifications (FCM/APNs) for ride confirmations and ETA updates. Delivered ongoing support, testing, debugging, crash resolution, and lightweight CI/CD workflows for internal and beta releases. Collaborated with stakeholders to translate operational needs into technical features.

Guest IT Support Service Agent at Delta Hotels

April 1, 2018 - February 1, 2020

Designed and developed a custom internal intranet portal to streamline hotel operations, including SOP access, employee directory, onboarding automation, and ticket-based tech support workflows. Provided hardware, software, and network support across 100+ endpoints, maintaining 95%+ user satisfaction. Administered user accounts and access controls through Microsoft 365 and internal identity systems. Troubleshot network connectivity, device configuration, authentication, VPN, and workstation issues. Supported enterprise platforms including Salesforce CRM and Microsoft 365. Reduced average support response times by 50% through documentation and escalation improvements. Collaborated with cross-functional teams to translate requirements into technical solutions.