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Full-Stack Mobile Engineer
Wake up, Samurai — time to ship off your next app 🚀
I'm crafting lightning-fast mobile experiences that keep users coming back.

Flutter • Android• iOS • Dart • Kotlin • Swift
Go • Rust
10
YEARS
OF
EXPERIENCE
20+
Projects
Delivered
Senior Android & Flutter Developer

What I Do?

Mobile App Development

Mobile App Development

From concept to launch, I build responsive, high-performance mobile applications that delight users across Android and iOS platforms with seamless experiences and cutting-edge functionality

Cybersecurity

Cybersecurity

From threat detection to implementation, I provide robust cybersecurity solutions that safeguard your digital assets, protect sensitive data, and ensure your business remains resilient against evolving cyber threats.

Internet of Things (IoT) & IIoT

Internet of Things (IoT) & IIoT

From concept to connected ecosystems, I develop Internet of Things and Industrial IoT solutions that transform physical assets into smart, data-driven systems enhancing efficiency, automation, and strategic insights

End-to-End AI-Powered Mobile Solutions

End-to-End AI-Powered Mobile Solutions

From on-device model optimization (TensorFlow Lite, Core ML, TinyML) and federated learning to hybrid edge-cloud workflows and seamless API integrations (OpenAI, Hugging Face), I build privacy-preserving, real-time AI experiences—computer vision, NLP, AR, personalization—and manage continuous model updates, A/B testing, and cost-optimized inference for high-performance mobile apps.

Technical Leadership & Team Management

Technical Leadership & Team Management

From building high-performing teams to bridging the gap between business vision and technical execution, I provide leadership that transforms organizational goals into actionable roadmaps, translates expectations across departments, and cultivates engineering excellence while delivering measurable business outcomes

More Services

More Services

From full-stack web development with modern backend technologies (Node.js, Go, Rust) to cloud infrastructure (AWS, Azure, GCP), CI/CD pipelines, database design, UI/UX design, and code audits—I provide comprehensive solutions tailored to your specific business needs.

My Portfolio

Explore a selection of projects that showcase my expertise across mobile development, cybersecurity, IoT, AI, and technical leadership.

DOCUframe MobileAccess

DOCUframe MobileAccess

A niche Android client for the German DMS/CRM platform DOCUframe®. Led deep refactor of a legacy app.

Role: Lead Android Engineer / Engineering Manager
AndroidJavaKotlinMVVMREST APIRetrofit Barcode ScanningBluetooth PrintingServer Driven UI
INGENIOUS.BUILD

INGENIOUS.BUILD

Construction project management platform for real estate development. Led Android/iOS team and rewrote mobile app from scratch to secure next investment round.

Role: Android / iOS Lead
AndroidiOSKotlinSwiftMVVMREST API
Mitt Spor - GPS Dog Tracking App

Mitt Spor - GPS Dog Tracking App

A comprehensive Flutter-based pet tracking and health monitoring app for Norwegian dog owners. Features real-time GPS tracking, activity monitoring, and geofencing.

Role: Senior Flutter Developer
FlutterDartIsarBLoCGPSIoTFirebaseMaps
TipTip - Cashless Tip App

TipTip - Cashless Tip App

Revolutionary Flutter-based mobile app for cashless tipping in restaurants using QR codes and NFC technology. Simplifies the tipping process for customers and staff.

Role: Lead Flutter Developer / Mobile Architect
FlutterDartBlocDioNode.jsMobile PaymentsQR ScannerNFCREST APIDrift
Gastrokasse - Restaurant Management App

Gastrokasse - Restaurant Management App

An app for waiters to check restaurant vacancies, reserve tables, take orders, and manage modifications. Used by multiple hotels including Hotel Rebhan.

Role: Android Developer
AndroidKotlinMVVMRoom DatabaseBluetooth Printing
LIVESTREAM/VOD SDK

LIVESTREAM/VOD SDK

Comprehensive live shopping SDK supporting streaming and VOD, integrated with major e-commerce platforms in Poland. Features include 1-click-buy, chat, emojis, and live feedback.

Role: SDK Architect / Lead Developer
AndroidiOSKotlinSwiftWebRTCHLSRTMPChat API
HOTEL ROOM - Remote Management

HOTEL ROOM - Remote Management

A specialized hotel app that enables remote management of hotel rooms, providing a competitive edge and added value for customers.

Role: Lead Mobile Developer
FlutterDartIoT IntegrationSmart Home APIsRestAPI
RAUH SCAN APP

RAUH SCAN APP

Logistics application that modernizes and simplifies the package delivery process for transport services.

Role: Mobile Developer
AndroidQR/Barcode ScanningGPS TrackingOffline SupportRoute Optimization
Field Service - Mobile Technician App

Field Service - Mobile Technician App

Mobile app supporting field workers and technicians with access to client documentation, real-time chat with colleagues, and instant invoice generation after job completion.

Role: Mobile Developer
AndroidiOSKotlinSwiftFirebaseRealmNode.jsJavaScript

Additional Projects: I've worked on numerous additional projects spanning mobile development, enterprise solutions, fintech, and emerging technologies. Some of these projects are under NDA agreements and cannot be publicly showcased.

Let's Work Together

Ready to bring your next project to life? I'm always excited to discuss new opportunities and challenges in mobile development, IoT, cybersecurity, and technical leadership.

Email

Email

konrad@krutkowski.com

Drop me a line anytime

LinkedIn

LinkedIn

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GitHub

GitHub

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Open source projects

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🚀 Ready to Start?

Whether you need a mobile app, IoT solution, security assessment, or technical leadership for your team, I'm here to help turn your vision into reality.

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