Open to opportunities

Erik Terwan

@erikterwan

I build intuitive Apple-platform apps and lead teams delivering high-impact mobile products.

I've built Apple-platform software since I was 15, most recently helping DNA.inc improve an AR/VR SDK, architecture, and developer-facing code. I build for iOS, macOS, watchOS, and tvOS while caring deeply about intuitive experiences and solid code.

I've led teams and shipped work for Starbucks, NOS, the Olympics, Avianca, and Weber, including apps serving over a million active users daily. My work spans SwiftUI, Kotlin Multiplatform Mobile, Bluetooth and WiFi integrations, secure deployment practices, testing, and mentoring junior and mid-level developers.

Experience

Work history, roles, and key accomplishments

Freelance Senior Apple Engineer

DNA.inc

Jan 2026 - Mar 2026 (2 months)

Provided feedback on SDK/API for a large AR/VR client, improving architecture and developer-facing code.

AR VR APIs and SDKs Architecture Developer Experience

Freelance iOS Developer

Media.Monks

Nov 2024 - Sep 2025 (10 months)

Led a team to release a major new feature for Starbucks while transitioning the project to SwiftUI.

iOS SwiftUI Team Leadership Project Management

Freelance iOS Developer

Talk360

Aug 2024 - Nov 2024 (3 months)

Worked on a VoIP native calling app in SwiftUI, fixing Bluetooth stack bugs and developing new features in a fast-paced startup environment.

SwiftUI VoIP Bluetooth Bug fixing Feature Development

Freelance iOS Developer

NOS

Apr 2023 - Sep 2023 (5 months)

Helped release a new version of the Jeugdjournaal app, a complete rewrite using Kotlin Multiplatform Mobile and SwiftUI with feature modules and custom state management.

Kotlin Multiplatform SwiftUI Feature modules Unit Testing Snapshot Testing State Management

Senior iOS Developer

Media.Monks

Jan 2020 - Jan 2023 (3 years)

Worked on multiple projects with over a million daily active users, including Starbucks, Olympics, Avianca, and Weber. Responsible for training junior and mid-level developers.

iOS Swift Security Real time Events Bluetooth WiFi Mentorship

Lead Developer

Child Healthcare Solutions

Jan 2018 - Jan 2020 (2 years)

Led a small team of developers building a central hub for in-house applications with a Swift (Vapor) backend and Vue.js/Nuxt.js frontend. Played a key role in obtaining ISO27001/NEN7510 certification.

Swift Vapor Vue.Js Nuxt.Js Team Leadership ISO 27001 NEN 7510 Secure Coding

Freelancer

Self Employed

Jan 2011 - Jan 2018 (7 years)

Worked on a wide range of projects including web apps (JS, React.js, Vue.js), iOS apps (Objective-C, Swift), and Android apps (Java) for clients like Johnson & Johnson, RANJ, and Audi Deutschland.

JavaScript React Vue.Js Objective C Swift Java Android