Hire the Best Android Developers
in Germany

I'm the Android developer who built in-vehicle navigation for Harley-Davidson and a 100,000+ download app with on-device AI. Need the hard parts done, Bluetooth/BLE, on-device AI, or native speed that can't lag? That's my lane. 8+ years, Kotlin-first. See exactly how I work in my Portfolio below: iThing, a live open-source IoT dashboard (99.6% Kotlin, Clean Architecture, Jetpack Compose), and Ambicam, my 100,000+ download surveillance app on Google Play. I also ship cross-platform with Kotlin Multiplatform (KMP), so you get iOS and Android from one codebase. Most clients come to me with one of these: • A Bluetooth/BLE device that pairs but won't stay connected or sync reliably • An app that needs AI running on the device, not a slow round-trip to the cloud • A native Android app that lags, drains battery, or crashes under load • Two separate budgets for iOS and Android when one shared codebase would do SERVICES I PROVIDE BLE & IoT-Connected Apps • BLE / Bluetooth device pairing, reconnection and background sync • Zigbee, TCP/IP and WiFi smart-device integration • Smart-home, wearable, healthcare and industrial IoT apps • Device data synced to your backend over REST API and Firebase • Native hardware integration that no-code tools and AI cannot fake On-Device AI & Computer Vision • On-device ML with TensorFlow Lite (data never leaves the phone) • Face recognition, number-plate / object detection, OCR (OpenCV) • Camera pipelines and real-time inference • Gemini and Claude API integration for cloud LLM features Native Android App Development • Kotlin, Jetpack Compose, Clean Architecture, MVVM, Coroutines, Flow • REST API integration, Firebase, Room, offline-first apps • Performance tuning, JNI/NDK and C/C++ for the critical paths • Automotive-grade, latency-sensitive, real-time systems • Full lifecycle: architecture to Play Store launch Kotlin Multiplatform (KMP) Cross-Platform • One shared Kotlin codebase for iOS and Android (60-95% shared) • Compose Multiplatform for shared UI • Roughly 35-50% cheaper than two native teams • Migrating an existing Android app to KMP PROVEN RESULTS (see for yourself) • iThing, a live open-source IoT dashboard (in my Portfolio): 99.6% Kotlin, Clean Architecture + MVI, Jetpack Compose, Hilt • Ambicam, a 100,000+ download Android surveillance app I built and maintain solo, on Google Play (iOS in Swift too) • In-vehicle navigation for Harley-Davidson (TomTom Navkit): led 5 engineers, 25% latency reduction • On-device face + number-plate recognition (TensorFlow Lite + OpenCV) and native C/C++ live streaming via JNI/NDK • BLE, Zigbee, TCP/IP and WiFi integrations for government-scale tracking and attendance hardware • First Upwork contract closed at 5.0 with all five client-insight endorsements HOW I WORK Communication: I reply within a few hours, give you honest timelines, and tell you the moment something changes. No silent weeks. Quality: Clean architecture, code that respects the Android lifecycle and device memory, tested on real hardware (not just an emulator). Where I fit: A senior Android app developer based in Munich, fluent in English and Hindi, conversational German, comfortable in EU time zones and GDPR-aware by default. TECHNOLOGY Native: Kotlin, Java, Jetpack Compose, Clean Architecture, MVVM/MVI, Coroutines, Flow, Hilt Cross-platform: Kotlin Multiplatform (KMP), Compose Multiplatform AI/ML: TensorFlow Lite, OpenCV, on-device ML, Gemini API, Claude API Native/Perf: JNI/NDK, C/C++, real-time streaming, performance profiling IoT/Hardware: BLE, Bluetooth, Zigbee, TCP/IP, WiFi, smart-device integration LET'S BUILD IT If your project involves a Bluetooth or IoT device, on-device AI, a performance-critical Android app, or a Kotlin Multiplatform build, send me the details. I will reply within a few hours with an honest read on feasibility, the approach I would take, and a realistic timeline. What is the hardest technical part of your app, the piece you are least sure can be done? Tell me that first. - Khyati Keywords: Android App Developer, Kotlin Developer, Mobile App Developer, Jetpack Compose, Kotlin Multiplatform (KMP), BLE Developer, IoT App Developer, On-Device AI, TensorFlow Lite, OpenCV, Native Android, Android NDK, Clean Architecture, Firebase, REST API, Cross-Platform App Developer, iOS Developer.

Senior Android Engineer | 10+ Years Experience | Fintech & E-commerce Specialist I help businesses build high-performance, production-grade Android applications that scale to millions of users. Based in Munich, Germany, I bring a decade of experience from industry leaders like thinkorswim (top-rated trading platform) and Wildberries (Europe's retail giant). What I bring to your project: ✅ Fintech Expertise: Deep understanding of real-time data, complex trading tools, and secure payment integrations. ✅ Modern Tech Stack: Expert-level Kotlin, Jetpack Compose, Coroutines, and Flow for building responsive, maintainable UIs. ✅ Architecture at Scale: Proven track record of migrating legacy Java codebases to modular Clean Architecture (MVVM/MVI) and Hilt/Dagger. ✅ Product Ownership: I don't just write code; I take features from architectural design to Google Play release, ensuring stability and 99.9% crash-free rates. Core Technical Stack: • UI: Jetpack Compose, Material 3, Custom Views. • Logic: Kotlin, Coroutines, Flow, Dagger/Hilt. • Data: Room, Retrofit, GraphQL, OkHttp. • Quality: Unit Testing, Performance Profiling, CI/CD. Whether you are a startup looking for an MVP or an established enterprise needing to refactor a complex module, I provide clean, scalable solutions and clear communication. Available for part-time/full-time contracts. Let's build something stable together!

Currently developing with React Native, React, and libraries including databases and server-side technologies compatible with React and React Native. I am engaged in the development of Admin Panel from interface design to programming of various functions, calculators, and automating the speed of work for the company. Consistently met my short and long-term targets. Dealing with customer complaints with empathy and composure. Actively participated in meetings and created new practices. A package of documentation has been processed and information has been entered into databases. Trained, coached, and supervised newsgroup members. Carefully handled large sums of money at the checkout. Offered an idea on how to improve productivity and efficiency. Helped management identify operational problems and find solutions. Managed and delegated tasks to a team of 6 people. Now only 4. In addition to this, I develop various projects and ideas (e.g., creating business cards or any design, developing an online store, online presentation of products—these are small projects that do not take much time). I also know how to develop 3D models and design 3D interiors (with experience in German standards). Just imagine your house or facility plan. Manage the WWW service; Conduct maintenance activities of the WWW service; Perform testing and quality assurance of the operation of the website and web applications; Maintain, monitor, and support the optimal functioning of the websites. Employment opportunities: Website technician; Webmaster; WebDesigner, etc.

👋 Hi, I am Khalil, I am a Senior Full Stack Engineer who loves turning tricky problems into clean, scalable and user-friendly solutions. I specialize in React(NextJS), Angular and TypeScript for responsive, modern Front-End and architect robust Back-End with NodeJS(Express), Java, FastAPI and PHP, supported by PostgreSQL, MongoDB, and Supabase. Experienced in real-time systems, AI-powered features and DevOps pipelines, I deliver maintainable solutions that scale effortlessly and drive business impact. I don't simply release features and I build systems that are high-performing, easily scalable and satisfy users from the start.

Hey there :) I’m a Full-Stack Developer with experience in AI, automation, Android, and iOS development. I enjoy building practical digital products that solve real business problems, not just demos. Recently, I worked on an AI legal advisor LLM using OpenAI, LangChain, FastAPI, and RAG, where users can ask legal-related questions and get structured answers from uploaded documents. I’m also building an AI chatbot for Shopify and WooCommerce stores that can answer customer questions, help with product search, track orders, recover abandoned carts, and reply in multiple languages. My main focus is helping startups and businesses save time, reduce manual work, and launch reliable AI-powered products faster. Tech Stack: Frontend: React, Next.js, HTML, CSS, JavaScript, TypeScript Backend: Node.js, Python, FastAPI, REST APIs AI & Automation: OpenAI, LangChain, RAG, n8n, Zapier Mobile: Android, Kotlin, Java, iOS, Swift, Flutter E-Commerce: Shopify, WooCommerce, AI chatbots, customer support automation Databases & Cloud: Firebase, Firestore, PostgreSQL, MySQL

Full-Stack Developer specializing in Java, Spring Boot, scalable APIs, and AI-driven systems with 3.5+ years of professional experience. I build secure, production-ready backend architectures, REST APIs, microservices, and automation solutions with a strong focus on performance, maintainability, and clean code practices. Experienced in Spring Boot, PostgreSQL, Docker, CI/CD, and cloud-native development, with additional expertise in Python, AI/LLMs, and full-stack application development. I’ve delivered high-performance systems in research and production environments, improved API efficiency, implemented TDD workflows, and developed intelligent automation pipelines. I help clients build reliable software that scales from backend systems and enterprise applications to AI-powered solutions and modern web platforms.