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

I'm John Martin, an iOS Developer and Solution Architect with over a decade of experience delivering iOS solutions across retail, enterprise, sporting, aviation, health tech and more. I excel at turning concepts into high-quality, user-centric applications for Apple devices, and I enjoy leading cross-functional teams to achieve measurable outcomes. I stay current with the latest technologies, design scalable architectures, and communicate clearly with stakeholders and engineers to ensure transparency, collaboration and trust. I'm open to independent contracting opportunities to help clients innovate and meet ambitious goals.…I'm John Martin, an iOS Developer and Solution Architect with over a decade of experience delivering iOS solutions across retail, enterprise, sporting, aviation, health tech and more. I excel at turning concepts into high-quality, user-centric applications for Apple devices, and I enjoy leading cross-functional teams to achieve measurable outcomes. I stay current with the latest technologies, design scalable architectures, and communicate clearly with stakeholders and engineers to ensure transparency, collaboration and trust. I'm open to independent contracting opportunities to help clients innovate and meet ambitious goals.

John Martin

Full Stack Developer, Front-End Developer, App Developer, +1





I'm John Martin, an iOS Developer and Solution Architect with over a decade of experience delivering iOS solutions across retail, enterprise, sporting, aviation, health tech and more. I excel at turning concepts into high-quality, user-centric applications for Apple devices, and I enjoy leading cross-functional teams to achieve measurable outcomes. I stay current with the latest technologies, design scalable architectures, and communicate clearly with stakeholders and engineers to ensure transparency, collaboration and trust. I'm open to independent contracting opportunities to help clients innovate and meet ambitious goals.…I'm John Martin, an iOS Developer and Solution Architect with over a decade of experience delivering iOS solutions across retail, enterprise, sporting, aviation, health tech and more. I excel at turning concepts into high-quality, user-centric applications for Apple devices, and I enjoy leading cross-functional teams to achieve measurable outcomes. I stay current with the latest technologies, design scalable architectures, and communicate clearly with stakeholders and engineers to ensure transparency, collaboration and trust. I'm open to independent contracting opportunities to help clients innovate and meet ambitious goals.

Available to hire

I’m John Martin, an iOS Developer and Solution Architect with over a decade of experience delivering iOS solutions across retail, enterprise, sporting, aviation, health tech and more. I excel at turning concepts into high-quality, user-centric applications for Apple devices, and I enjoy leading cross-functional teams to achieve measurable outcomes.

I stay current with the latest technologies, design scalable architectures, and communicate clearly with stakeholders and engineers to ensure transparency, collaboration and trust. I’m open to independent contracting opportunities to help clients innovate and meet ambitious goals.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Senior iOS Developer at The Economist

September 1, 2025 - September 11, 2025

Delivered greenfield iOS features including onboarding, paywall/IAP, cross-entitlement, analytics integration, article gifting and tooltip support; addressed Core Data performance and memory issues; improved article scroll performance.

iOS Developer at Pulselive

March 1, 2024 - September 11, 2025

Developed features for large-scale apps for major sporting events; re-architected for white-label use; implemented branding rollouts and API integration; contributed to Kotlin Multiplatform sharing.

iOS Developer at Beyond

March 1, 2022 - September 11, 2025

Designed a hardware abstraction layer architecture to support multiple devices (card readers, printers) and connectivity types; led refactoring to support multiple models and easier device integration.

Senior iOS Developer at Deloitte (Keytree In-store Technology)

March 1, 2021 - September 11, 2025

Re-engaged to continue support for in-store deployment; enhanced app for additional clients; improved performance and configurability for new store launches.

Senior iOS Developer at Deloitte (Keytree In-store Technology)

March 1, 2020 - September 11, 2025

Provided iOS expertise for configurable in-store technology product; led modular architecture and rollout to client; transitioned app to middleware; added extensions for new features and API integrations.

iOS Developer at Black Swan Data

June 1, 2019 - September 11, 2025

Developed high-profile avionics-focused white-label product; implemented Core Bluetooth peer-to-peer synchronization; integrated with hardware devices and middleware APIs for pre/post flights.

iOS Developer at Infinity Health

April 1, 2018 - September 11, 2025

Prepared app for App Store release; refined UI/UX; fixed defects; improved performance and stability; worked with Swift 4, Realm, Carthage and REST APIs.

Senior iOS Developer at Keytree Limited

January 1, 2018 - September 11, 2025

Led iOS development for in-store technology; built modular CocoaPods-based codebase; mentored developers; supported enterprise deployments with major retailers.

Co-founder and CTO at DASH PM

February 1, 2017 - September 11, 2025

Co-founded the mobile project management app; led iPad development (Objective-C with Swift enhancements) and server-side API/backend (Java/SpringBoot); MVP delivered for 2014 release.

CEO and IT Consultant at Martinsoft Limited

February 1, 2014 - Present

Owner and Principal IT Consultant; specialised in native iOS development services, APIs and system integrations; designed and delivered full-stack iOS solutions and provided ongoing support to clients.

Server-side (Java) and Mobile (iOS) Developer at Yazino

March 1, 2013 - September 11, 2025

Developed server-side Java and iOS mobile components in a gaming environment; contributed to platform features.

Principal Consultant at Detica (BAE Systems)

August 1, 2011 - September 11, 2025

Provided high-level consultancy and software development expertise in enterprise environments; led large-scale technology initiatives.

Software Developer at Truro College

July 1, 2003 - June 30, 2003

Software development role in early career; supported college IT projects and learning platforms.