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4.8/5
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  • $60 hourly
    • 5.0/5
    • (27 jobs)
    Software Engineer, with extensive experience developing mobile and web applications from the ground up. Comfortable working on all aspects of the full-stack, from UI design and implementation on the front-end to API and database integration and development on the back-end. Back-end development specialities include API integration and development with GraphQL, RestAPIs, and authentication providers. Adept at both developing and maintaining highly scalable database solutions using PostgreSQL, MySQL, SQLite and DynamoDB amongst others. Multiple years of experience working with CMS providers such as WordPress and Strapi developing custom blogging platforms and eCommerce sites. Front-end development specialities include React and React Native development, UI and UX design, and native web development using HTML, CSS, JS and TypeScript. Developing many projects past launch, I have thoroughly studied SEO and ASO, using this to develop applications that are optimized. I have a First-Class Computer Science Degree from the University of St Andrews. Previously, I have worked in the Aerospace & Defence Industry, a sector where bad habits and low-quality code are simply not an option; a mentality that I maintain when working for my own clients. I am a relatively new freelancer, but I have had plenty of experience delivering high-quality software throughout my career. Thank you for taking the time to read this far. Expertise: React and React Native || HTML || CSS || JS || PostgreSQL || DynamoDB || WordPress || Strapi || GraphQL || RestAPI || Postgraphile || React Apollo || AWS Architecture || API Integration || SEO || ASO || Authentication APIs
    Featured Skill Android App Development
    Amazon DynamoDB
    PostgreSQL
    MySQL
    Website Maintenance
    TypeScript
    Web Development
    React
    Node.js
    Next.js
    Firebase
    API Development
    React Native
    HTML
    JavaScript
    iOS Development
    WordPress
    API Integration
  • $30 hourly
    • 5.0/5
    • (11 jobs)
    🏆 TOP RATED PLUS (1% OF UPWORK) 🏆 💪💻 OVER 10 YEARS EXPERIENCE 🤵 RELIABLE PARTNER I offer great service and long-term support to my clients. You are looking for someone who could go with you from very first of the idea or someone for fixing your current project? I could do both. I am flexible, adaptable, trustworthy and patient. I also update myself newest technology regularly. Here are my list of skill: - Artificial Intelligence and Machine learning - Open AI and GPT Integration - Python solutions - Fullstack development - Web development - Database intergration - Automation
    Featured Skill Android App Development
    AI Development
    AI App Development
    Software Development
    WordPress
    AWS Development
    AWS Lambda
    Web Development
    API Development
    Apple Xcode
    Angular
    Kotlin
    Swift
    iOS
    Mobile App Development
    PHP
  • $105 hourly
    • 4.7/5
    • (738 jobs)
    ** HubSpot Design Certified ** Recently recognized as a HubSpot Champion User Worked on many different types of applications and with many different technologies. Quickly learn new programming languages and technologies. Can also read and understand existing code to find and fix bugs. Have 26 years experience in IT. Have a Bachelors Degree in Math as well as an MBA. I have worked with many programming languages including COBOL, Visual Basic, C, C++ and Java. Currently working on projects utilizing Angular, JQuery, Java Script, CSS, HTML5, Hubspot and Flex. I am familiar with content management systems. I have worked on front end designs/pages and back end services. Have done responsive development, desktop applications, and mobile applications.
    Featured Skill Android App Development
    CSS
    HTML
    Content Management System
    HubSpot
    CMS Development
    Website Customization
    Agile Software Development
    Blog Development
    Inbound Marketing
    Templates
    Business with 100-999 Employees
    iOS Development
    JavaScript
    Java
  • $49 hourly
    • 5.0/5
    • (3 jobs)
    Hi all, I’m an Android Developer with 6+ years of experience. I prefer using modern programming languages and technologies and always keep in touch with the latest Android Development updates. Experienced in developing applications from scratch, as well as complementing existing projects. Know how to understand someone else’s code, do the bug fixing, extend the application with new functionality. Self started, experienced, responsible and highly motivated. Like challenges. Do my best to create good apps. UI DESIGN - Figma - Sketch App - Adobe Photoshop - Adobe Illustrator PROGRAMING LANGUAGES - Kotlin - Java FRAMEWORKS - Kotlin Coroutines - Retrofit - Dagger - Koin - Hilt - NavigationComponent - Glide - Android Jetpack/Architecture - Material Components DATABASES - SQLite - Room TOOLS - MVP, MVVM - Firebase Cloud - Messaging - Firebase Crashlytics - Git PM METHODOLOGIES: Agile, Scrum, Kanban If you are looking for a reliable, creative and experienced IT professional, you have come to the right place - I will eagerly become your longtime partner. Let’s start to work together!
    Featured Skill Android App Development
    RxJava
    Model View ViewModel
    iOS Development
    Hybrid App Development
    Mobile App Development
    Firebase
    Facebook Development
    Material UI
    Dagger 2
    Android Studio
    Gradle
    Android SDK
    SQLite
    Firebase Realtime Database
    Kotlin
    Java
  • $35 hourly
    • 4.8/5
    • (52 jobs)
    👋Hi, I am Mobile App Developer, Full-Stack and Flutter Developer with 12 years of experience, relocated to Paraguay 🌳 Since 2013, I've been a proud member of Upwork in the area of app development.  🤖🌐 ✅ I bring a strong track record of success, having developed over 50 mobile apps, that have garnered millions of downloads and received rave reviews. Over 30 Flutter and other mobile app hybrid technologies. I am a lifelong learner passionate about continuously improving my collaboration and mobile application development skills. ✅ Last learned and my favorite technology to make efficient mobile app solutions is Flutter, and I am very strong in native mobile applications written in Swift, SwiftUI and Kotlin, Java. ✅ Possess in-depth knowledge of both front-end and back-end app development, allowing me to tackle projects from conception to deployment. ✅ My strong side is a deep understanding of object-oriented programming in flutter, respect for clean code principles, and proper architecture in flutter to ensure that I deliver high-quality and scalable solutions. Multiple clients have praised my flutter app development, mobile app development skills, and skills in full-stack app development: ⭐⭐⭐⭐⭐ "Denis was very skillful and helpful in every part of the process. In addition to doing the job in a very good way he also was a good "teacher" in helping me improve my skill and learning quicker and faster ways to develop. We worked very well as a team as well. In addition he helped me to set up some backend server with node.js. I look forward to working with him in the future on the Android part of the app" ⭐⭐⭐⭐⭐ "Solid Developer. Always available to talk. Produced quality work." ⭐⭐⭐⭐⭐ "Denis is very strong developer technically and from the product point of view, besides producing great software he gives you fantastic product recommendations. It is rare to meet a developer, who would give his option on UI/UX, but Denis is that kind of developer - he wants the app he is working on to be great and he delivers it right and on time. I highly Denis for any iOS related work. he is one the best developers i have ever worked with!" ⭐⭐⭐⭐⭐ "Denis is a skilled engineer who knows iOS and Android well, knows details on each platform more than most engineers do, and can help you find and eliminate bugs, memory leaks, etc." ⭐⭐⭐⭐⭐ "Denis did a fantastic job of our Parse migration and iOS update from the start and was very diligent, fast and communicative throughout the project. We would highly recommend him to anyone else who wants a competent app developer to carry out their work." ------Right now I am looking for a Flutter or native mobile app development project. I'll be happy to help with Full-Stack as well. I am available full time------- I specialize in mobile app solutions and I am an expert in the following: 📱Native iOS mobile app development: Swift, Swift UI, Objective C app developer, Apple in-app purchases 📱Native Android mobile app development: Java, Kotlin apps 📱Cross Platform mobile app development: Flutter app developer, Flutter Flow apps, React Native apps 🌐 Web and Full-Stack app development: React.js web apps, Vue.js and other Javascript-based web frontend frameworks, Java web apps, Node.js apps, Python, MEAN|MERN stack, cloud-based backend as Firebase, Amazon AWS, Azure. 💪 Appealing Agile Methodology in applications development: Adept of apps produced using the Agile approach for flexible project management. 🤝 Communication and Soft Skills in App Development: Excellent written and verbal communication skills to ensure clear project understanding. Looking forward to working together! Shoot me a message or apply to my profile. Let's make it happen!
    Featured Skill Android App Development
    Mobile App Bug Fix
    Mobile App Development Consultation
    App Development
    Flutter Stack
    FlutterFlow
    Mobile App Development
    iOS
    Android App
    iOS Development
    Dart
    Flutter
    Mobile App Design
    Mobile App
    Mobile App Redesign
  • $75 hourly
    • 5.0/5
    • (79 jobs)
    I understand my rates are higher than most, and for good reason. With 14+ years of experience and a proven track record delivering results for companies like Google, Meta, Cisco Systems, Reddit, Vivint Inc, Upwork Inc, and hundreds of startups, I focus on one thing: turning your development investment into real business growth. 📩 Let’s talk: whether you're building a product from scratch, scaling an existing app, or want the best system design for your startup using modern technologies, I’m here to help. My system design skills have been recognized and appreciated by multiple Fortune 500 companies. 🔥 Credentials: ✅ Expert-Vetted & Top Rated Plus on Upwork ⏱ 5,650+ Hours logged | ⭐ 100% Job Success 🧠 14+ Years in software engineering, technical leadership & agile product delivery 🧩 Core Expertise: - Custom Software Development – Tailored, scalable solutions to fit your unique needs - Mobile App Development – iOS & Android apps using Swift, Kotlin, and React Native - Web Development – Full-stack applications with React, Angular, and Node.js - Magento Expert – Magento 1 & 2 customization, optimization & integrations - AI/ML Integration – Implementing LLMs, LangChain, OpenAI, and Hugging Face models - Cloud Infrastructure – AWS Certified, with deep expertise in EC2, EKS, CDK, GCP & Azure - Enterprise-Grade Systems – Building secure, robust, and maintainable applications 🛠 Tech Stack: - Languages: JavaScript, TypeScript, Python, Swift, Kotlin, Ruby, Java, C# - Frameworks: ReactJS, Angular, Vue, Django, Spring Boot, Ruby on Rails - Mobile: Swift, Kotlin, React Native, Flutter - Databases: PostgreSQL, MySQL, MongoDB, DynamoDB - Cloud & DevOps: AWS, GCP, Azure, Docker, Terraform, AWS CDK, Heroku - E-commerce: Magento, WooCommerce, Shopify, SAP Commerce Cloud - AI Tools: OpenAI, LangChain, Hugging Face, TensorFlow, Diffusion Models - Let’s build something extraordinary together.
    Featured Skill Android App Development
    Magento
    Magento 2
    App Development
    AWS Lambda
    iOS Development
    AngularJS
    Amazon DynamoDB
    Swift
    React Native
    React
    Amazon Web Services
    Objective-C
    PHP
    JavaScript
  • $23 hourly
    • 4.9/5
    • (57 jobs)
    Greetings! I am a highly experienced and top-rated mobile developer from Lviv with over 15000 working hours on Upwork. My expertise lies in developing native iOS and Android apps, as well as cross-platform apps using React Native and Flutter. Over the years, I have worked on a wide range of projects, from simple utility apps to complex enterprise-level solutions. My skills include: • Strong knowledge of Swift, SwiftUI, Objective-C, Java, Kotlin, React Native, and Flutter • Experience working with various APIs and SDKs, including Firebase, Google Maps, and AWS • Proficiency in using version control systems such as Git and SVN • Ability to design scalable, maintainable, and reusable code • Strong debugging and troubleshooting skills • Familiarity with Agile methodologies In addition to my technical skills, I am also an excellent communicator and team player. I have worked with clients from various industries, and I understand the importance of clear communication, timely delivery, and excellent customer service. If you're looking for a reliable and skilled mobile developer, I am here to help. Feel free to get in touch to discuss your project requirements in detail. Thank you for your time, and I look forward to working with you! Best regards, Oleksii .
    Featured Skill Android App Development
    SwiftUI
    iOS SDK
    React Native
    Flutter
    In-App Purchases
    Java
    Objective-C
    iOS Development
    Kotlin
    Swift
    Smartphone
    Mobile App Development
    Android
    iOS
  • $35 hourly
    • 5.0/5
    • (2 jobs)
    I'm a developer with 5+ years of experience in Android native development. There are a lot of different applications in my portfolio: messengers, maps, e-commerce, media, IoT clients, business clients, and even games. Many of them work great and carry out their tasks, some of them have become one of the best in their field with hundreds of thousands of pleased active users. I experienced: - Android SDK - Java, Kotlin - Realm, SQLite, Room - Firebase - Dagger 2, Koin - RxJava 1, 2; Coroutines, Flow - OkHTTP, Retrofit, Smack (XMPP) - MVC, MVP, MVVM, MVI - Compose - Clean Architecture, SOLID, GoF, UDF, KISS, DRY и др - AndroidJetpack: Live Data, ViewBinding, Livecycle, Navigation и др. - Git, Github, Gitlab, Bitbucket, Jira, Trello, Redmine, Linux, Crowdin, TravisCI, GitlabCI, Jenkins, Postman, and other instruments Contact me if you want to make your application great!
    Featured Skill Android App Development
    Kotlin
    Android
    Android SDK
    Realm Database
    Multithreaded Programming
    Java
    Material Design
  • $50 hourly
    • 4.9/5
    • (195 jobs)
    ** I am what I am because of what we all are. ** I am a self-motivated, hard-working, and open-source contributor. I am also an Android Enterprise Certified Professional. My GitHub handle is *amsurana* Mobile experience [since 2009] * Worked on Qualcomm, Mediatek, Amlogic, Rockchip based devices. * Porting and Writing Device Drivers * Customizing Android Kernel * Android Automotive OS Expert - Projects and Consulting. Ported Automotive OS to RPI. * Android Firmware development for all kind of Devices [PCBA, Phones, Tablet, TV, Accessories] * Android SDK/NDK * Android Wearable * Custom ROM - I have deep experience in customizing Android and modifying the entire OS experience as per the requirements. Some of the customizations I have done - changing boot animations, modifying shutdown screen, removing bloatware, developing system-level apps, making a tablet a Kiosk (without permissions), Bluetooth stack modification, Carrier config updates, and many more. * Secure OS - Make your Android ultra-secure. * OTA for A/B Seamless or Non-AB devices * Secure Android OS using AVB Tool * MDM, EMM, Mobile Device Management - If you plan to use MDM or develop your MDM, do reach out to me. I have experience in Airwatch, SOTI, ScaleFusion, Gears42, and FieldX. Special Skills: Z-wave, Zigbee, IoT, Amazon Alexa, Google Home Assistant, Smarthome, IFTTT Keywords - Android, Web, Social Media Integration, Java, J2EE, Bluetooth, BlueZ, DBus, AOSP, Custom ROM, Docker, Play Framework, Linux, AWS, EC2, MongoDB, Eclipse, Cyanogen mod, LineageOS Android TV, Android OS, Custom ROM, Tizen, LinegaeOS, RaspberryPi, OrangePi, Khadas VIM, HiKey, Amlogic, Rockchip, Airwatch, SOTI, MDM, EMM, Pentest, Penetration Testing, Qualcomm, Mediatek
    Featured Skill Android App Development
    Raspberry Pi
    AOSP
    Mobile Device Management
    Embedded System
    Firmware
    Internet of Things
    Firmware Programming
    Android SDK
    Android NDK
    Mobile App Development
    Android
    Kotlin
    Java
  • $75 hourly
    • 4.9/5
    • (66 jobs)
    I am a professional software developer with 25 years of experience. I focus on mobile app development for Android and iOS, web development, and cloud services. Throughout my career I have gained experience in many different technologies, from modern cloud, mobile, and web development architectures all the way back to mainframe systems. My app development experience includes location services, map integration, user authentication and user profile management, payment functionality, media playback including both audio and video, and in-app purchases. I can work with many services available from Amazon Web Services (AWS) and Google Cloud Platform (GCP). I am committed to producing a quality product. I always stand behind my work and communicate as much as I can. The more my client and I both know about what is being done, the happier everyone is.
    Featured Skill Android App Development
    ChatGPT
    Google Cloud Platform
    User Profile Creation
    Location-Based Service
    Firebase
    Amazon Web Services
    Node.js
    Java
    Kotlin
    Swift
    iOS Development
    iOS
    Android
    Mobile App Development
  • $33 hourly
    • 4.8/5
    • (32 jobs)
    Hello, I'm working with Flutter (Cross platform mobile framework from Google) for more than 5 years and have deep understanding of framework and plugins. I was responsible for implementing and maintaining various mobile apps, components and tools parts including pixel perfect UI, state management architecture, user authorization, maps navigation, messaging, in-app purchases. My current stack is: - Flutter/Dart cross platform - BloC, Provider state management - Android, Android Wear (Java, Kotlin) - iOS (SWIFT) - Node.js - REST API - Google Cloud - Firebase Auth, Firebase Firestore, Firebase Distribution, Firebase Cloud Functions - Git - Facebook, Google, Apple,OAuth - CI\CD (Codemagic) - InApp purchases (RevenueCat) - Payment (Stripe)
    Featured Skill Android App Development
    SQL
    iOS SDK
    Mobile App Development
    Firebase Cloud Firestore
    Java
    Kotlin
    Android
    Swift
    Firebase
    Flutter
    Dart
  • $90 hourly
    • 5.0/5
    • (68 jobs)
    Featured Skill Android App Development
    Ionic Framework
  • $75 hourly
    • 4.2/5
    • (30 jobs)
    I'm an Android developer and consultant over 7 years experience. I have solid expertise in the bolts and nuts of modern android development and can competently handle complex projects. I have comprehensive experience in building apps from scratch, taking over existing unfinished projects and poorly built projects that are in need of swift bug fixing, performance optimizations, new featues, code refactoring and cleanup.
    Featured Skill Android App Development
    Android SDK
    Android
    Clean Architecture
    Mobile App Development
    Git
    Google Play
    Unit Testing
    Firebase
    Xamarin
    Java
    Kotlin
  • $30 hourly
    • 4.9/5
    • (325 jobs)
    ***Upwork Top Rated HubSpot CMS Developer with 100% Job Success & Full Stack HubSpot Solutions Partner!*** ***Automate & Streamline Your Marketing With HubSpot Solution Partner*** # HubSpot Certified Partner # HubSpot CMS Certified # HubSpot CMS Developer # Certified HubSpot Developer # Top HubSpot Solutions Partner # Full Stack HubSpot Solutions Partner I specialize in HubSpot CMS development, API integrations, and UI extensions to automate and optimize your digital processes, saving you time and effort. HubSpot Expertise You Can Trust: A recognized developer and technical expert in the HubSpot community, I deliver exceptional results – it's all I do! # HubSpot CMS Website Design # HubSpot CMS Website Development # HubSpot CMS Landing Page Design # HubSpot CMS Landing Page Development # HubSpot CMS Blog Design Design # HubSpot CMS Blog Design Development # HubSpot CMS Email Template Design # HubSpot CMS Email Template Development # HubSpot CMS Newsletter Template Design # HubSpot CMS Newsletter Template Development # HubSpot Infographic Design # HubSpot Infographic Development # HubSpot CMS module-based Development # HubSpot CMS Drag-and-Drop # HubSpot CMS Theme Design # HubSpot CMS Theme Development # HubSpot App Development Are you looking for a HubSpot CMS Certified Developer? Here I'm a HubSpot Certified CMS / COS designer and developer, working with a variety of B2B, and B2C industries, and marketing agencies to provide a variety of websites, landing pages, blogs, email templates, infographics dynamic pages, etc. as per business requirement. My main focus is on the page's performance with proper and interactive user experience with pixel-perfect designs and fully responsive to all devices. I have vast experience in API and jQuery plug-in integration with HubSpot. I enjoy working with tools, and platforms, and the core part of HubSpot expertise is mentioned below: # HubSpot # HubSpot CMS # LeadPages # WordPress # Shopify # Wix # Squarespace # Mailchimp # Campaign Monitor # UI/UX Design # PSD to HTML # PSD to HubSpot CMS # Figma to HubSpot # Design in HubSpot # Development in HubSpot # WordPress to HubSpot # Wix to HubSpot # Webflow to HubSpot # Squarespace to HubSpot # HubSpot Migration # HubSpot Marketing Automation # HubSpot App Marketplace # Mailchimp Email Template Development # Campaign Monitor Email Template Development # HubSpot CMS Hub # HubSpot Sales Hub # HubSpot Marketing Hub # HubSpot Service Hub # HubSpot Operations Hub # HubDB # HubL Code # Hub API # JavaScript Integration In HubSpot # HTML5 # CSS3 # BootStrap # JSON # JavaScript # jQuery # Ajax # CRM Integrations # CRM setup # HubSpot Onboarding # API Integrations # Inbound Marketing # Graphical user interface design (UI/UX Design) Native Mobile Apps | React Native | Kotlin | Flutter | Swift PHP + Laravel, Symphony, Yii Python Django, Java Spring, hibernate Please feel free to contact me to arrange an interview. Thank you for your time and consideration. I look forward to hearing more from you.
    Featured Skill Android App Development
    Landing Page Design
    WordPress Landing Page
    PSD to HTML
    Website Migration
    PSD to Mailchimp
    Landing Page
    Web Development
    Email Template Development
    Mobile App Development
    Figma
    WordPress
    Webflow
    HubSpot
    Shopify
    Mailchimp
  • $15 hourly
    • 5.0/5
    • (20 jobs)
    #AndroidDeveloper I graduated from GC University with a degree in Computer Science in 2019 and have been working professionally as a Android developer since 2018. I developed more than 50 apps and also worked as a team lead in Idealogic software house.
    Featured Skill Android App Development
    Android SDK
    Laravel
    Android
    Kotlin
    Java
    Node.js
  • $55 hourly
    • 5.0/5
    • (54 jobs)
    Hi, I’m an Android developer with over 10 years of experience in building native applications. I work with a modern tech stack, including Android Jetpack, Kotlin Coroutines, Jetpack Compose, MVVM, and Dependency Injection (DI). I also have experience with cross-platform development using Flutter/Dart and Kotlin Multiplatform. Key Expertise: • Audio/Video Calls: WebRTC integration for real-time communication. • In-App Purchases and Google Play Billing. • Machine Learning: On-device ML with TensorFlow Lite, ML Kit. • Geolocation and Firebase Services (e.g., FCM, Crashlytics, Analytics). • Media Processing: Photo, video, and audio. • Platform Migration: Converting iOS/web apps to Android. I’m skilled at integrating third-party APIs, working with CI/CD pipelines, and implementing modular architectures for scalable and testable code. I’d love to help bring your ideas to life, from early-stage concepts to full-scale app solutions. Feel free to reach out! Thanks, Oleksandr Ilchuk
    Featured Skill Android App Development
    Android SDK
    Mobile App Development
    Firebase
    Smartphone
    Android
    Flutter
    Java
    Kotlin
  • $15 hourly
    • 5.0/5
    • (9 jobs)
    Hi, If you are looking for a 𝐫𝐞𝐥𝐢𝐚𝐛𝐥𝐞, 𝐜𝐫𝐞𝐚𝐭𝐢𝐯𝐞, 𝐚𝐧𝐝 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞𝐝 App Developer, you have come to the right place - I will eagerly become your longtime partner. I am an expert 🆃🅾🅿- 🆁🅰🆃🅴🅳🏅 App Developer (Android, iOS) with 7+ years of experience, 𝐈 𝐡𝐚𝐯𝐞 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐝, 𝐭𝐞𝐬𝐭𝐞𝐝, 𝐚𝐧𝐝 𝐝𝐞𝐩𝐥𝐨𝐲𝐞𝐝 𝐬𝐞𝐯𝐞𝐫𝐚𝐥 𝐚𝐩𝐩𝐬 𝐨𝐧 𝐛𝐨𝐭𝐡 𝐭𝐡𝐞 𝐚𝐩𝐩 𝐬𝐭𝐨𝐫𝐞 𝐚𝐧𝐝 𝐩𝐥𝐚𝐲 𝐬𝐭𝐨𝐫𝐞.I prefer long-term work and am In love with coding and am proud of my creations! I am working on high-quality iOS/Android applications for different industries, including medicine, marketing, advertisement, etc as a developer. I have overall 6 years of experience. It's important to me to create supportable and upgradable applications. I prefer to build long-term relations with my customers. When they come back to add support for new mobile devices or new features - I am always glad to see that application continue its life. My Skill Set: ------------------- - Flutter, Dart - Swift, Xcode, iOS SDK - Java, Kotlin, Android Studio - Super Level UI Customization, Suggestion of Best User-Friendly and elegant UI/Graphic design - Google Map Service, Real-time tracking, Geo-location, GPS, Geo-fencing - Web services, REST/SOAP, XML/JSON Domains on which i developed apps ------------------------------------------------- On-Demand Marketplace Utility Social networking/Chat/messaging Mini-games E-commerce Bluetooth/beacons Taxi/booking Fitness/health Coding Strategy: ------------------------- *Well-optimized, clean, robust, and well-commented code with qualified naming conventions. * Multi-Language Support * Localization And Internationalization support * API /Web Service Integration Thanks!
    Featured Skill Android App Development
    RESTful API
    Apple Xcode
    iOS Development
    Firebase
    Kotlin
    Java
    PHP
    Firebase Realtime Database
    Swift
  • $60 hourly
    • 4.9/5
    • (79 jobs)
    I am a well-rounded software engineering expert with around two decades of experience. As a developer, architect and a consultant I have hundreds of successfully completed projects under my career belt. Software development is what I like and I do it very well. My skillset roughly covers these areas: - software development - applications design and architecture - troubleshooting and bug fixing - operations support - requirements analysis. My major areas of expertise are: - software development for a wide range of platforms, including but not limited to Microsoft ecosystem, Apple devices, web and cross-platform apps and services; - cloud platforms - Azure, CGP, AWS; - data modeling, data warehouses, ETL, data engineering; - Business Intelligence with a strong focus on MS BI (MSSQL, SSIS, ADF, etc) and Power BI; - Office 365 (O365). I can write clear and efficient code in a wide variety of programming and scripting languages. I hold a number of certifications from Microsoft, CompTIA and I am also a PMI-certified professional. I have excellent communication skills and unique cross-discipline experience. I will be glad to help you with your next software project. Feel free to reach out to me to discuss or invite me to your job.
    Featured Skill Android App Development
    Microsoft Visual Studio
    C#
    Business Intelligence
    Microsoft Power BI
    iOS Development
    watchOS
    Troubleshooting
    Microsoft SharePoint Administration
    Microsoft Azure
    Apple Xcode
    React Native
    Microsoft Azure SQL Database
    Software Development
    Root Cause Analysis
    Database Programming
  • $30 hourly
    • 4.8/5
    • (29 jobs)
    I am a professional mobile app developer with more than 4 years of experience. I have experience developing native apps using Java, Swift or ReactNative.
    Featured Skill Android App Development
    Swift
    Objective-C
    React Native
  • $65 hourly
    • 5.0/5
    • (59 jobs)
    8 plus Years of experience in android development worked 70+ fully functional apps I am a professional mobile developer specializing in Android App Development. I have a bachelor's degree in Software Engineering. Highlights worked 70+ fully functional applications for Android devices with more than 1M+ downloads. Known for writing efficient, maintainable, and reusable code. Proficient in design, data structures, problem-solving, and debugging. Expert in the interaction between various devices and versions of Android. BS Software Engineering degree Currently, I have these applications on my personal android developer account: • Muslim Matrimonials app (Firebase backend) • Audiobooks free download (API call) • Ok Ameer Urdu assistant (Firebase backend) • Copy hashtags for Instagram (web scraping and API call) • Video touch lock for youtube - locki touch lock(100,000+ downloads with 4.1 ratings ) • Animated gif live wallpaper - Lite(700,000+ downloads with 4.0+ ratings) • Snap map fake location spoofer(100,000+ downloads with 4.1 ratings) • Champion trophy live score • Latest Urdu news updates • Jang epaper QR Code Reader • Pakistani Urdu news Professional Technical Skills: Deep understanding of Android SDK Android Studio MVVP(android new ViewModel lib) JSON/Volley Firebase Libraries integration like Facebook, YouTube, Exo player,Rxjava Google play services e.g. Google map Android Annotation. Material Design Data Binding RX android Kotlin Programming Java Programming Web scrapping Design patterns Github Tensorflow Proguard Reverse engineering SQL lite with ROOM lib Constraint layout Non-Technical Skills Passionate I can very quickly learn to new technologies like Kotlin, android new architecture components, and so on Collaboration and communication Writing Bonus! A Good Idea Youtuber Understanding of Google plays policies. I am very active on StackOverflow and Github. Looking forward to working with you. Let's build the strong and trusted relationship
    Featured Skill Android App Development
    Native App
    Google Maps API
    JSON
    TensorFlow
    Android SDK
    GitHub
    Mobile App Development
    Tablet
    Smartphone
    Android Studio
    Android
    Java
    Firebase
    Kotlin
  • $50 hourly
    • 4.6/5
    • (9 jobs)
    Unity Game Developer | Multiplayer & Physics Expert | C# Specialist I'm a seasoned software engineer and Unity game developer with strong expertise in C# and a deep understanding of gameplay systems, multiplayer networking, and physics-based mechanics. Over the years, I’ve built and contributed to a wide range of game projects from small indie prototypes to complex multiplayer titles, handling everything from prototyping and core mechanics to optimization and polish. I’ve shipped successful commercial games including Little Sim World and Nightclub Tycoon which have collectively generated over $1 million in revenue. What sets me apart: ✅ Strong grasp of Unity's architecture and performance best practices ✅ Multiplayer development using FishNet, Photon Fusion, and custom netcode ✅ Server-authoritative gameplay and tick-based simulation for precision and fairness ✅ Physics-driven systems (e.g. racing, knockback, ragdoll) with realism and responsiveness ✅ Full development cycle experience, from planning and architecture to testing and release ✅ Comfortable working solo or integrating into remote teams with clear, timely communication Whether you're looking to develop a multiplayer party game, a racing system with fine-tuned handling, or need a reliable dev to implement clean and scalable gameplay logic, I'm ready to help bring your vision to life.
    Featured Skill Android App Development
    Multiplayer
    Mobile App Development
    Mobile Game Development
    Game Development
    Video Game
    Unity
    C#
  • $20 hourly
    • 4.9/5
    • (53 jobs)
    🌟 Top-Rated Upwork Professional 🧑🏻‍💻 10+ years of experience 📱 Android | Kotlin | Java | Jetpack Compose | Kotlin-Multiplatform| Flutter | WearOS | AndroidTV | 🚀 AI | ChatGPT | 💻 Firebase | VoIP | Linphone With over 10 years of extensive experience as an Android Developer, I specialize in native Android application programming with a strong focus on SCRUM/Agile workflow. 
 
I have a proven track record of delivering high-quality mobile applications in various domains, including:
 * Airline Domain * Banking Domain * Cargo Management Domain * Logistics Domain * Financial Domain * Social Media/Dating Domain with Video/Audio Chats * Location Tracking Domain
 My expertise in mobile development includes:
 * Programming Languages: Java, Kotlin * Architectural Patterns: MVVM, MVP, MVC * Design Patterns, Custom Controls, and REST API integration * Material Design, Mobile UI/UX, and Firebase integration (AdMob, Analytics, A/B testing, etc.) * Jetpack Compose, Jetpack Navigation * Firebase Realtime Database and Storage * Android SDK, NDK, Open Source, Support Libraries * Reactive Programming with rxJava and rxAndroid * Dependency Injection using Dagger, Kodein, and Hilt * Databases: SQLite, Room, Realm, Page * Network Libraries: Retrofit, OkHttp, Volley, ktor * Image Loading Libraries: Picasso, Glide * Crash Reporting and Analytics Tools: Crashlytics, Firebase, Fabric, LeakCanary, Timber * Other Libraries: Gson, AutoValue, JodaTime, AndroidJob, Google Services * Sockets/SignalR * Kiosk Mode * SonarQube code coverage * Kotlin-Multiplatform (One POC)
 * Wear OS & Smartwatch development * Mqtt In addition, I am an expert in the Linphone SDK, a powerful tool for building voice and video communication applications. I have in-depth knowledge of integrating and customising the Linphone SDK to create high-quality, real-time voice and video chat functionalities within Android applications. I am experienced in implementing Linphone's advanced features, including call management, audio/video codecs, encryption, push notifications, and more. Whether you need to develop a VoIP application from scratch or enhance an existing app with Linphone capabilities, I can provide the expertise you require.
 I have integrated various features and technologies into Android applications, including:
 * Beacons integration for proximity-based interactions * Calendar API integration for managing events and schedules * QR Code integration for scanning and processing QR codes * OCR (Optical Character Recognition) integration for text recognition and extraction
 For multimedia capabilities, I have integrated Video Chat using WebRTC, ZegoClould, Twilio, and Agora, as well as Audio Streaming. I am familiar with ExoPlayer for HLS Video Streaming (HTTP Video Streaming), RTSP Video Streaming, and DASH Video Streaming.
 Other skills and features I offer include Custom Calendar development, Media Gallery implementation, Background Download and Upload functionality, Tiff file format handling in Android, Live Streaming using Agora and ZegoCloud SDK, Deep Linking, LeakCanary for memory leak detection, and code annotations to improve the linting process.
 Experienced Kotlin Multiplatform Developer with a track record of delivering efficient cross-platform solutions. Proficient in Kotlin Multiplatform Mobile (KMM) and skilled in creating high-performance apps for Android, iOS, web, and more. Experienced Jetpack Compose Developer, proficient in creating dynamic, interactive, and modern Android UIs. Skilled in leveraging Jetpack Compose's power to build visually stunning and responsive applications. Over the years, I have developed many different types of iPhone and Android apps. These include: - Food delivery apps - On-demand apps - Home services apps - Handy man apps - Salon apps - Beauty apps - Taxi apps - Ride apps - E-commerce apps - Dating apps - Health and fitness apps - Travel apps - Video streaming apps - Fintech apps - Shopping apps - Telemedicine apps - Finance apps - Real estate apps - Social media apps - Chat apps - Business apps - Messaging apps - Online courses apps - Online education learning apps - Tutor apps - Hotel booking apps - Online grocery order apps - Telecommunication apps - VoIP apps - SIP Apps - Apps using the Twilio API I am fluent in English and passionate about Android development. Please feel free to reach out to me with any Android-related questions or projects. I would be pleased to help you bring your ideas to life.
    Featured Skill Android App Development
    Mobile Device Management Software
    AOSP
    Java
    Smartphone
    iOS Development
    User Authentication
    Android
    JetPack
    Mobile App Development
    Wear OS
    In-App Purchases
    VoIP
    Firebase
    Kotlin
  • $20 hourly
    • 4.9/5
    • (60 jobs)
    Languages: Java/Kotlin OOD: SOLID/DRY/KISS principles, GoF patterns, MVC/MVP/MVVM/MVI architecture Jetpack: ViewModel, LiveData, LifeCycle, Room, Paging, Navigation, WorkManager, Compose Libraries: RxJava/RxAndroid, Dagger/Hilt, Retrofit/OkHttp, Gson/Moshi, Glide/Picasso/UIL/Coil, ButterKnife, Realm, Parceler, EventBus, GPUImage, Timber, JodaTime/ThreeTen, Dexter, GoogleMaps/OSM/YandexMapKit, Zxing, MPAndroidChart SDK: Firebase, Facebook/Twitter/OK/VK/LinkedIn, Google Play Services (auth, analytics, cloud messaging, drive, ads, location, activity, in-ap billing)
    Featured Skill Android App Development
    RESTful API
    Android SDK
    Kotlin
    Java
    Android Studio
    Firebase
    Android
  • $60 hourly
    • 4.7/5
    • (35 jobs)
    ✅ Top Rated Plus (Top 3%) Upwork Freelancer ✅ 100% Job Success Ratio ✅ 32+ Successfully Completed Jobs ✅ 8+ years experience For many years, I have worked as a Unix system administrator, but then I went back to my childhood passion - programming. And what better place for it than mobile app development! I’m developing Android apps more than 10 years now and iOS apps (using Swift/Objective-C for more than 8 years) expanding my knowledge and expertise every day. While I have a strong knowledge of basics and standard Android and iOS frameworks, I also have experience in wide number of third-party SDKs: Firebase, Facebook, Google Maps etc. I’m devoted to writing quality clean code that will be a delight for anyone who takes over and you won’t have problems developing your app further along. Also, my analytical skills developed in system administration days are of great help developing your app idea even further. Looking forward for long-term cooperation. - My Skills: ✔️︎ iOS (iPhone/iPad,iOS), Objective-C, Swift / SwiftUI, Xcode ✔️︎ Android (Java, Kotlin, Android Studio) ✔️︎ Cross Mobile App Developer with Flutter ✔️︎ API Development using XMPP, Socket.io, WebSocket ✔️︎ API Integration(JSON, XML, REST/SOAP) ✔️︎ Coding Architecture (MVP, MVVM) ✔️︎ Mobile App Database (MySql, SQLite, Core Data, Realm) ✔️︎ Google, Facebook, Instagram, LinkedIn, Twitter APIs. ✔️︎ Apple and Google Pay, In-app billing services like Integrating in-app purchases, selling consumable-non consumable products, virtual and physical goods. ✔️︎ Integrating push notifications and handling the backend as well for this (APNs, Firebase, OneSignal). ✔️︎ Payment integration (Stripe, Braintree, and so on) ✔️︎ Crash analysis and reporting ✔️︎ Google Maps, MapBox, GeoFencing. ✔️︎ Amazon AWS, Firebase Cloud services, Parse server ✔️︎ GitHub, Bitbucket, Trello, JIRA, Asana
    Featured Skill Android App Development
    Unity
    Git
    Linux System Administration
    C#
    iOS SDK
    iOS Development
    React Native
    Firebase
    Swift
    Objective-C
    Kotlin
    Java
    Ionic Framework
    Flutter
  • $40 hourly
    • 4.8/5
    • (72 jobs)
    iOS & Android Mobile Apps / Website Design & Development Professional and skilled in design and development, bringing your ideas to market: *Food/Retail Delivery, Pickup Platform for Drivers, Staff and Customers; *Social Networks for Friends/Groups with Chat, Feeds, Profiles, Signup and Login; *Yelp-like Geolocation Services; *Buy and Sell Marketplaces with Commissions and Payments; *Task Management, Expense Management and more. iOS, Android apps and websites that are user-friendly and easy to maintain. You can count on me to communicate with regular updates and be available on short notice. Attention to project details include following best practices and guidelines for design (Material Design), testing and bug fixes, creative solutions and clean code. Why am I a good fit for you? I own Tiny Screen Labs, located in the Chicago area. We provide full stack development for mobile apps and websites. I have a growing portfolio of apps for startups, businesses, nonprofits and creatives. I handle the design, development and publishing of your apps. After the apps are launched, we provide updates and support. Please contact me about your project and get a fixed price proposal
    Featured Skill Android App Development
    iOS Development
    WordPress Plugin
  • $30 hourly
    • 4.9/5
    • (34 jobs)
    Goal: My goal is to exceed client expectations by delivering top-quality work. Hello! I am a renowned professional developer with a specialization in developing CRMs, along with extensive experience in Web Development, Mobile App Development, Artificial Intelligence, and UI/UX design. My expertise lies in meeting the unique needs of both companies and individuals. I have strong analytical skills, allowing me to research, analyze, and develop innovative solutions. I am a quick learner and can work efficiently both independently and as part of a team to create high-quality applications. Additionally, my exceptional communication, interpersonal skills, and problem-solving abilities make me an excellent team player. I would be delighted to offer my services to you. Please feel free to reach out to schedule an interview. I look forward to connecting with you!
    Featured Skill Android App Development
    User Interface Design
    Artificial Intelligence
    SwiftUI
    Ecommerce Website Development
    Full-Stack Development
    MERN Stack
    Web Development
    Mobile App Development
    Dart
    Flutter
    Hybrid App Development
    Kotlin
    Swift
    iOS Development
  • $75 hourly
    • 4.9/5
    • (58 jobs)
    Ever felt swamped in the vast sea of mobile app developers? It's frustrating when deliveries are late, functionalities go missing, and codes resemble intricate mazes. Trust me, you aren't the only one navigating these waters. Many collaborators have shared stories of past stumbles. But here's a ray of hope: we can steer towards a brighter horizon. With a decade under my belt and a heart full of passion, I aim to rewrite these narratives. Some Milestones: ⭐ Spearheaded development for Fitbit, which impressively raised $66M. ⭐ Had the honor of collaborating with Pure, Powerdot, and Xsat, all of which celebrated significant investment milestones. ⭐ Steered numerous projects using cutting-edge technologies, simplifying and accelerating the development trajectory. ⭐ Seamlessly merged the principles of Agile & Scrum, fostering flexibility and quick turnarounds. Let me introduce myself I'm Sergey, possibly your next Lead Android/iOS Developer. The past decade has been an exhilarating roller-coaster, packed with invaluable experiences, challenges, and a string of successful projects. I've lent my expertise to startups, and industry giants, helping them manifest their mobile app dreams. Why do they choose me? ✅ A relentless drive to craft projects that stand out and garner rave reviews. ✅ Undying support post-project because our relationship isn't just transactional. ✅ A rich toolkit encompassing Kotlin, Swift, and trailblazing frameworks like Jetpack Compose & SwiftUI. ✅ Agility in approach with a deep-rooted foundation in OOP & Functional programming styles. My Array of Specialties: 📱 Leading mobile development with Kotlin, Java, Swift 🚀 Cross-platform mobile app development using Flutter, React Native 🌐 Backend prowess with Firebase and Node.js. 💻 Architectural excellence with MVVM, MVP, MVI, and VIPER. 🔄 Transparent updates and effortless communication, ensuring you're always in the loop. In a nutshell? I value transparency, efficiency, and making a tangible difference. It's not just about crafting any mobile app, but sculpting one that resonates, scales, and surpasses the norm. Ready to embark on an extraordinary journey? Let's unite over a virtual coffee and set the wheels in motion for your next mobile marvel!
    Featured Skill Android App Development
    Machine Learning
    VPN
    Wear OS
    Smartphone
    Mobile App
    iOS
    Android
    iPad App Development
    Kotlin
    Android NDK
    Java
    Android SDK
    Swift
    iOS Development
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Android App Developer Hiring Guide

What is an Android app developer?

An Android app developer is a professional specializing in android application development, creating mobile applications for the Android platform. They use programming languages like Kotlin and Java, as well as tools like Android Studio and the Android SDK, to build high-quality apps. These apps are designed to run smoothly across Android devices such as smartphones, wearables, and even Android TVs.

Android developers focus on key aspects like user experience, functionality, and compatibility, ensuring the app is ready for the Google Play Store. From e-commerce solutions and real-time messaging apps to IoT integrations, these experts deliver mobile app development projects tailored to specific use cases and business needs.

Why hire an Android app developer?

Hiring an Android app developer ensures your mobile development project benefits from expert Android development skills. Professionals in this field bring years of experience working with frameworks, development tools, and APIs like Firebase, allowing them to deliver high-performance apps optimized for the Android platform.

With their expertise, Android developers create solutions for startups, enterprises, and businesses of all sizes. Whether you need a cross-platform app built with Flutter or React Native, a web app integrated into your ecosystem, or an MVP for the Play Store, their technical proficiency ensures exceptional outcomes.

How to hire Android app developers

Hiring the right talent for Android app development services requires clear steps. Here’s how to hire an Android app developer on Upwork:

  • Define your project goals. Clearly outline your mobile app development needs, including functionality, target devices, and key features like in-app messaging, real-time updates, or IoT capabilities.
  • Set a budget and timeline. Decide how much to allocate for your development project and the timeframe for completion.
  • Write a detailed job post. Specify required skills, such as expertise in Kotlin, Java, Android SDK, and development tools like Jetpack Compose.
  • Review proposals. Evaluate potential hires based on their portfolios, feedback, and relevant Android development experience.
  • Conduct interviews. Ask about their approach to app design, experience with frameworks, and understanding of platforms like the Play Store.
  • Hire and start your project. Once you find the right professional, collaborate to build a seamless workflow for success.

How to write an Android app developer job post

An effective job post attracts top-tier Android app development talent. Follow these steps to craft a compelling post:

  1. Create a descriptive title. Examples include “Experienced Android Developer for E-commerce App” or “Kotlin Expert for IoT Mobile Application.”
  2. Provide project details. Explain your app’s purpose, use cases, and specific requirements, such as Android Studio or Firebase integrations.
  3. List technical skills. Include necessary expertise, such as proficiency in programming languages like Java and Kotlin or knowledge of React Native and Flutter for cross-platform development.
  4. Clarify deliverables. Specify what’s expected, whether it’s an MVP, a completed app for the Google Play Store, or ongoing app design support.
  5. Mention budget and timeline. Being upfront about these details can help you connect with professionals who fit your needs.

Common Android app developer services

Android app developers provide specialized services across industries like healthcare, e-commerce, and startups. Here are common offerings:

  • Custom Android app development. Tailored solutions for businesses, from high-performance apps to innovative features like IoT and wearable integrations.
  • Cross-platform app development. Building apps using Flutter or React Native for both Android devices and iOS platforms.
  • API and third-party integrations. Enhancing apps with features like real-time messaging, in-app payments, or analytics using tools like Firebase.
  • Maintenance and upgrades. Ensuring your app remains functional with updates for Android platform compatibility and Android SDK changes.
  • Web development and app design. Creating web apps or improving UX for seamless functionality across mobile devices.

FAQ

What is Kotlin, and why is it important for Android app development?

Kotlin is a modern programming language designed for Android development. It improves workflow, enhances productivity, and integrates seamlessly with Java and the Android SDK.

Can Android developers also build iOS apps?

Yes, developers can use cross-platform frameworks like Flutter or React Native to create apps for both iOS and Android devices, making mobile development more efficient.

What tools do Android developers use?

They often rely on Android Studio, Jetpack Compose, and tools like Firebase for software development and testing. These IDE and tools streamline building apps for the Android ecosystem.

What industries benefit most from Android application development?

Industries like healthcare, e-commerce, IoT, and startups often rely on Android app development services to create innovative solutions for smartphones, wearables, and mobile devices.

Hire an Android app developer on Upwork

Ready to bring your Android application development project to life? Start today:

  • Sign up for Upwork.
  • Post your Android app development job.
  • Hire skilled professionals to build your app.
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