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I am a Senior Mobile Engineer with 15+ years of experience designing and delivering scalable, production-grade mobile applications for startups, scale-ups, and enterprise teams. I specialise in clean architecture, performance, and long-term maintainability, delivering across the full software development lifecycle from design and architecture through implementation, testing, and deployment. I consistently ship reliable solutions on time in both greenfield and legacy environments. I work closely with product, design, and backend teams, translating complex requirements into robust, maintainable solutions and delivering predictable outcomes at any team size. I have deep native iOS expertise (Swift, SwiftUI, UIKit) complemented by 3+ years of Android development in Kotlin, and since 2020 I have been applying Kotlin Multiplatform to unify iOS and Android business logic while keeping fully native UI on both platforms.…I am a Senior Mobile Engineer with 15+ years of experience designing and delivering scalable, production-grade mobile applications for startups, scale-ups, and enterprise teams. I specialise in clean architecture, performance, and long-term maintainability, delivering across the full software development lifecycle from design and architecture through implementation, testing, and deployment. I consistently ship reliable solutions on time in both greenfield and legacy environments. I work closely with product, design, and backend teams, translating complex requirements into robust, maintainable solutions and delivering predictable outcomes at any team size. I have deep native iOS expertise (Swift, SwiftUI, UIKit) complemented by 3+ years of Android development in Kotlin, and since 2020 I have been applying Kotlin Multiplatform to unify iOS and Android business logic while keeping fully native UI on both platforms.

Sander Korebrits

PRO

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

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I am a Senior Mobile Engineer with 15+ years of experience designing and delivering scalable, production-grade mobile applications for startups, scale-ups, and enterprise teams. I specialise in clean architecture, performance, and long-term maintainability, delivering across the full software development lifecycle from design and architecture through implementation, testing, and deployment. I consistently ship reliable solutions on time in both greenfield and legacy environments. I work closely with product, design, and backend teams, translating complex requirements into robust, maintainable solutions and delivering predictable outcomes at any team size. I have deep native iOS expertise (Swift, SwiftUI, UIKit) complemented by 3+ years of Android development in Kotlin, and since 2020 I have been applying Kotlin Multiplatform to unify iOS and Android business logic while keeping fully native UI on both platforms.…I am a Senior Mobile Engineer with 15+ years of experience designing and delivering scalable, production-grade mobile applications for startups, scale-ups, and enterprise teams. I specialise in clean architecture, performance, and long-term maintainability, delivering across the full software development lifecycle from design and architecture through implementation, testing, and deployment. I consistently ship reliable solutions on time in both greenfield and legacy environments. I work closely with product, design, and backend teams, translating complex requirements into robust, maintainable solutions and delivering predictable outcomes at any team size. I have deep native iOS expertise (Swift, SwiftUI, UIKit) complemented by 3+ years of Android development in Kotlin, and since 2020 I have been applying Kotlin Multiplatform to unify iOS and Android business logic while keeping fully native UI on both platforms.

Available to hire

Hoofddorp, Netherlands

I am a Senior Mobile Engineer with 15+ years of experience designing and delivering scalable, production-grade mobile applications for startups, scale-ups, and enterprise teams. I specialise in clean architecture, performance, and long-term maintainability, delivering across the full software development lifecycle from design and architecture through implementation, testing, and deployment. I consistently ship reliable solutions on time in both greenfield and legacy environments.

I work closely with product, design, and backend teams, translating complex requirements into robust, maintainable solutions and delivering predictable outcomes at any team size. I have deep native iOS expertise (Swift, SwiftUI, UIKit) complemented by 3+ years of Android development in Kotlin, and since 2020 I have been applying Kotlin Multiplatform to unify iOS and Android business logic while keeping fully native UI on both platforms.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

Dutch

Fluent

English

Advanced

Work Experience

Freelance Mobile Architect (iOS & KMP) at Normec Carenet

January 1, 2015 - Present

Architected and delivered a greenfield iOS application for iPhone and iPad with an offline-first architecture using Core Data; delivered a second greenfield dual-platform mobile solution for iOS and Android, supported by a shared Kotlin Multiplatform layer for networking and business logic, achieving full feature parity across platforms while maintaining native UI. Built a mock server using the same KMP networking layer, auto-generating an OpenAPI spec with 100% endpoint coverage, eliminating external dependencies in integration testing. Implemented a proactive API error-reporting system with real-time diagnostic alerts and automated MTTR reduction. Built Jenkins CI/CD pipelines on a dedicated macOS build server, automating testing and App Store/TestFlight distribution.

Freelance iOS & Android Developer at Lahoux Optics

January 1, 2019 - January 1, 2025

Owned a legacy dual-platform (Objective-C/Java) codebase, focused on stability and controlled evolution. Modernised the media stack with a VLC-based playback solution, expanding codecs and formats while improving playback reliability. Expanded platform capabilities by adding support for new camera hardware and device variants, preserving backward compatibility with existing integrations.

Senior iOS Consultant at Framna / M2Mobi

January 1, 2018 - January 1, 2022

Mobile agency work delivering apps for clients including Heineken, AH to go, and Dubai Airports. Implemented end-to-end onboarding flows and maintained App Store compliance across iOS releases. Designed and implemented a reusable RESTful chatbot integration framework, abstracting complexity behind a protocol-driven interface to accelerate delivery agency-wide. Collaborated across Design, Backend, Android, and QA in Agile/Scrum environments to ensure smooth cross-platform delivery.

Freelance iOS Developer at Clue Technologies

January 1, 2015 - January 1, 2018

MYHOMEBOX: unified home automation platform connecting devices across radio technologies. Architected and delivered full mobile and cloud infrastructure with modular Xcode architecture, AWS backend services, and messaging protocols. Designed serverless AWS architecture using API Gateway, Python Lambda, and MQTT for secure bidirectional device control with sub-second responsiveness. Built push notification service via AWS Lambda and APNs and developed an Alexa Skill in Python.

Freelance iOS Developer at Northernlight

January 1, 2014 - January 1, 2015

Interactive iPad experiences for the Philips Museum and Jewish Historical Museum. Implemented Mission Eureka! with iBeacon proximity and location-triggered gameplay. Created personalised post-experience webpages and photo certificates. Built an interactive cultural experience for the Jewish Historical Museum with multimedia quizzes and PHP-backed content.

Freelance iOS Developer at Designlapp

January 1, 2011 - January 1, 2014

Freelance iOS development across multiple clients. Delivered an AR-powered discovery experience for Spoorwegmuseum Utrecht, a companion app for MyRocki, and a white-label app generation framework enabling branded iOS apps from a single codebase.