Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I’m Harjot Singh, a Senior iOS Engineer focused on delivering high-performance mobile apps across banking, fintech, telecom, and retail. I specialize in Swift, SwiftUI, and UIKit, with a passion for modernizing legacy code, optimizing app performance, and mentoring engineers in fast-paced, agile environments. I enjoy exploring modular architectures and micro-app patterns, implementing Coordinator-based navigation, and building automated tests to ensure interface stability across devices. I thrive on collaboration and delivering features that scale.…I’m Harjot Singh, a Senior iOS Engineer focused on delivering high-performance mobile apps across banking, fintech, telecom, and retail. I specialize in Swift, SwiftUI, and UIKit, with a passion for modernizing legacy code, optimizing app performance, and mentoring engineers in fast-paced, agile environments. I enjoy exploring modular architectures and micro-app patterns, implementing Coordinator-based navigation, and building automated tests to ensure interface stability across devices. I thrive on collaboration and delivering features that scale.

Harjot Singh

App Developer, Full Stack Developer, Web Developer, +2





I’m Harjot Singh, a Senior iOS Engineer focused on delivering high-performance mobile apps across banking, fintech, telecom, and retail. I specialize in Swift, SwiftUI, and UIKit, with a passion for modernizing legacy code, optimizing app performance, and mentoring engineers in fast-paced, agile environments. I enjoy exploring modular architectures and micro-app patterns, implementing Coordinator-based navigation, and building automated tests to ensure interface stability across devices. I thrive on collaboration and delivering features that scale.…I’m Harjot Singh, a Senior iOS Engineer focused on delivering high-performance mobile apps across banking, fintech, telecom, and retail. I specialize in Swift, SwiftUI, and UIKit, with a passion for modernizing legacy code, optimizing app performance, and mentoring engineers in fast-paced, agile environments. I enjoy exploring modular architectures and micro-app patterns, implementing Coordinator-based navigation, and building automated tests to ensure interface stability across devices. I thrive on collaboration and delivering features that scale.

Available to hire

I’m Harjot Singh, a Senior iOS Engineer focused on delivering high-performance mobile apps across banking, fintech, telecom, and retail. I specialize in Swift, SwiftUI, and UIKit, with a passion for modernizing legacy code, optimizing app performance, and mentoring engineers in fast-paced, agile environments.

I enjoy exploring modular architectures and micro-app patterns, implementing Coordinator-based navigation, and building automated tests to ensure interface stability across devices. I thrive on collaboration and delivering features that scale.

Skills

Swift

iOS

Objective-C

Experience Level

Swift

Expert

iOS

Expert

Objective-C

Expert

Language

English

Fluent

Work Experience

Independent iOS Engineer at Independent iOS Engineer

May 1, 2024 - Present

Built a modular health and Retail application proof-of-concept using micro-app architecture and SwiftUI to pioneer modular UI component design. Implemented Coordinator-based navigation to decouple routing logic from the view layer, improving testability. Developed automated UI layout rendering tests to validate interface stability across diverse iOS device form factors. Optimized SwiftUI state management using modern observation frameworks, reducing redundant view redraws and improving performance.

iOS Consultant at Deloitte Digital, UK

August 1, 2022 - April 1, 2024

Delivered business-critical features for a high-traffic UK banking application using Swift and modular feature isolation. Maintained high XCTest unit test coverage standards using TDD practices to eliminate production regressions. Engineered secure client-side modules focusing on biometric login flows and robust session storage via iOS Keychain. Collaborated with DevOps teams to streamline CI/CD pipelines, manage complex branch merges, and ensure application release stability.

Technical Anchor - Mobility iOS at Infosys Ltd

November 1, 2018 - August 1, 2022

Led technical delivery, established engineering standards around Protocol-Oriented Programming, and mentored junior developers to elevate code quality. Anchored the technical strategy to migrate legacy Objective-C app modules to a clean, modular Swift architecture with zero live feature disruption. Worked on-site in the USA developing customer-facing features for a retail app serving millions of daily users; monitored network latency and resolved high-load crashes using Splunk, Grafana, and New Relic. Modularized a monolithic codebase into localized, team-owned Swift Packages, reducing local build times by 30% and integrating automated testing into deployment pipelines. Operated within high-performing Scrum frameworks across prominent UK loyalty and reward applications (On-Site) to seamlessly translate business requirements into high-performing features.