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4.8/5
based on 27,630 client reviews
  • US$48 hourly

    • 4.2/5
    • (11 jobs)
    I started in mobile development before the invention of the iPhone in a mom-and-pop games company creating the first multiplayer cellphone games for Qualcomm's BREW platform in C and C++. Since then, I've done freelance and speculative work in many languages, especially Java and Kotlin, and created a few apps which can be seen on my app store page, demonstrating the use of Amazon Web Services S3, Lambda, and Cognito integration; TextToSpeech and SoundPool/MediaPlayer resources; and a custom and user-customizable InputMethodService (built-in keyboard), among other things. (See my Google Play store linked below.) I'm seeking jobs to make use of and expand my experience in Kotlin, Android, and AWS and to this purpose I am happy to dive into existing code to solve bugs and insert new functionality, in addition to from-scratch development. Recent and Current Projects: IoT Bluetooth Display and Relay - Android App in Kotlin for phone/tablet and wearable Real-time control, calibration, processing, display, relay, and recording/playback of multiple remote sensors of various types in custom groupings and sessions. Maintaining bluetooth connection through out-of-range and device interruptions. WeeGee - Android App in Kotlin, Amazon Polly, under development Experimental alternative communication system in which touch interaction over custom dynamic menus builds strings of phonemes spoken aloud by the device's text-to-speech engine or Amazon's Polly service. DecodeTheNews - Android App in Kotlin, Amazon S3 and Lambda, released in October 2018 Challenging cryptogram game presenting current or historical headlines rather than quotes and a sophisticated interface. ImageKeyboard - Android App with InputMethodService, released February 2019 For users of icon-based alternative or augmentative communication, this app converts a directory tree of named images into a paged keyboard that can be set to replace the native Android keyboard in any text-input context. Insert and delete whole words, making text editing easier. Customizable preferences include grid size, highlight, trail, and other feedback behavior, touch sensitivity, and page navigation options. Retains several custom keyboards for easy context-swapping. GridMaker - Javascript Chrome App/Electron, under development as an Android module In support of the ImageKeyboard app, this program automatically parses icon grid images into a directories of named icon images, using OCR where possible. ChooseBook - Android App with Amazon S3, released in June 2018 Choose-your-own-adventure style ebook reader for young kids with zoom-and-pannable pictures, text-to-speech reader, and links between pages for easy navigation. A Javascript web page helps organize text, pagelinks, and images for each book in JSON files stored in Amazon S3. The app can browse available titles and download selected books, to view immediately or store on device for offline use. DecodeTheNews - Web Game, released 2015 Javascript/PHP application which finds and encrypts current headlines, storing them along with letter frequencies, a list of unique words, and other statistics for use by the cryptogram-style game. Visual tools in the game, including a pattern-matching dictionary, help players solve the cryptogram. A timer and leaderboard add suspense. Users can create an account or track their game history through a unique ID based on ip and computer configuration. Past Projects: RylaCampbell.com - Wordpress site with custom photo gallery with thumbnail navigation Songtunnel.com - PHP/MySQL Web Page, released 2007 A lyrics search site which grabbed and indexed song lyrics from other websites and enabled an advanced text/artist/album search. Matching songs are sorted by relevance with title, artist, album, year, and lyric snippet, as well as links to the Amazon media sample and "Buy now" referral link if available. Multiplayer Snake - C++/BREW Mobile app with Java, released 2005 The first true live-action multiplayer game on this platform. Developed to show off Entelepon's seamless networking layer. In offline and low-population games, non-player-controlled snakes using path-finding and goal-balancing algorithms fill in for other players with different levels of difficulty. Multiplayer Tank - C++/BREW Mobile app with Java, released 2004 The first turn-based multiplayer game on this platform where both player's actions were graphically represented in real time on the game-board. First use of Entelepon's UDP messaging layer. Offline play was available, against an AI using path-finding and cost/benefit strategies to simulate an intelligent opponent. Players could be matched at random or from a group of users within a custom "channel". Pre-coded taunts added a bit of social interaction. Dozens of game maps and random tank-fleet configurations made each game unique.
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    Android
    Bluetooth
    Amazon Polly
    MySQL Programming
    Android App Development
    Amazon Cognito
    Amazon S3
    Kotlin
    Java
    JavaScript
  • US$50 hourly

    • 5.0/5
    • (27 jobs)
    I’m a programmer with more than 10 years of experience who can work in different programming langauges using different frameworks. I can create any application type: ● web based ● desktop If I don’t know any programming language or framework which you want to use to build your application then I can learn it in couple days. SKILLS ● PHP ● Javascript ● jQuery ● Bootstrap ● AJAX ● MySQL/PostgreSQL ● REST API ● HTML/HTML5 ● CSS/CSS3 ● C/C++ ● Ruby (and framework Ruby On Rails) ● Python ● Java ● CUDA Computation ● OCR (on C/C++, Python, Java) EXPERINCE ● Freelance 5+ years (up to July 2014). I was working hard to learn what clients want to see, to learn different programming languages and frameworks. Those years taught me to learn new things everyday to provide high-quality solutions for my client. Here's some of my works (PHP, MySQL, HTML, CSS, JavaScript): ○ dev.louepartout.com ○ kilosolution.com ● Swiss Interactive Software GmbH (August 2014 - December 2014). Front-End and Back-End developer for gambling platform and websites (using the platform). Here's you can see some of the websites we built (PHP, MySQL, HTML, CSS, JavaScript, Bash): ○ betboro.com ○ sports.flutterclub.com ○ sports.princessstar.com ○ globalbet.eu ● Ad.net (February 2015 - Present).
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    HTML5
    CSS 3
    C++
    Java
    MySQL
    React
    Bot Development
    Automation
    Data Scraping
    Python
    PHP
    Data Extraction
    Web Crawling
    JavaScript
    Selenium
  • US$46 hourly

    • 5.0/5
    • (4 jobs)
    I am a tech enthusiast and Software Engineer with +7 years of experience in several fields. - Front-end experience: Flutter - Back-end experience: Firebase, Java, Node.js, C#, Ruby on Rails I am the co-founder of a Flutter Agency (SmartUp Software) in which we provide custom software development and staff augmentation services, having developed and deployed 10+ apps/webs. I developed an award-winning social project called "Berrinche" whose main purpose is to help parents and therapists of those with ASD to discover the causes of disruptive conduct and how to treat them.
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    pandas
    Microsoft Power BI
    Python
    Dart
    In-App Search
    Node.js
    Ruby on Rails
    CSS
    HTML
    Java
    C#
    Android
    Angular
    JavaScript
    Flutter
  • US$55 hourly

    • 5.0/5
    • (54 jobs)
    Hi. I’m a native Android developer with 7+ years of software development experience. I’m working with modern development stack: Android Jetpack, AndroidX, Coroutines, LiveData, DataBinding, Room, Rx, DI, MVVM, Git, etc. I also have experience in​ using Flutter/Dart to build cross-platform solutions. Some areas in which I have extensive experience: - Media processing (photo, video, audio). - Geolocation. - Integration of third-party API like Facebook, Google, Twitter, Dropbox, Amazon. - Firebase services (FCM, Analytics, Crashlytics, AdMob, etc.). - Machine learning. - In-App Purchase. - Converting Web/IOS apps to Android. - And more… Please feel free to contact me and I'll help you at any stage, from an idea or small app to a full-scale solution. Thanks!
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    Android SDK
    Mobile App Development
    Android App Development
    Firebase
    Smartphone
    Android
    Flutter
    Java
    Kotlin
  • US$30 hourly

    • 5.0/5
    • (2 jobs)
    10+ Skills | 15+ Years experience in Engineering field Android, Java/Kotlin/Python/C/SQL, UI/UX, Git, GitHub/GitLab/Bitbucket, Android Studio/IntelliJ IDEA/Eclipse, Trello/GitLab board, SOLID Firebase, Bluetooth and much more - developing projects from scratch (setup, architecture, features development) - deveopment for embended devices - support legacy projects - integration of new technologies - working with Google guidelines I can just do any job for you, no matter how difficult the task you describe I do
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    Firebase
    Coroutine
    Retrofit
    Android Studio
    Java
    SQLite
    Kotlin
    Android App Development
    Mobile UI Design
  • US$20 hourly

    • 4.9/5
    • (42 jobs)
    🌟 Top-Rated Upwork Professional 🧑🏻‍💻 9+ years of experience 📱 Android | Kotlin | Java | Jetpack Compose | Kotlin-Multiplatform| Flutter | WearOS | AndroidTV | 🚀 AI | ChatGPT | 💻 Firebase | VoIP | Linphone With over 9 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
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    Mobile Device Management Software
    AOSP
    Java
    Smartphone
    iOS Development
    User Authentication
    Android
    JetPack
    Mobile App Development
    Wear OS
    In-App Purchases
    VoIP
    Firebase
    Android App Development
    Kotlin
  • US$40 hourly

    • 5.0/5
    • (48 jobs)
    I have a passion for taking the web and making it mobile. Over last 10 years I got mobile development experience in a broad range of industries, including social gaming, education, sports entertainment, dating, restaurant management and rental solutions. I have solid understanding of full mobile and software development life cycles, UIX, web analytics, changing web standards, and Agile methodologies. Dedicated to continuously developing, implementing, and adopting new technologies to maximize development efficiency and produce innovative applications.
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    Google Maps API
    CSS
    Git
    SQL
    GPS
    Android SDK
    Smartphone
    Android App Development
    Android
    Kotlin
    Java
    User Authentication
  • US$105 hourly

    • 4.7/5
    • (731 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.
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    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
    Android App Development
    JavaScript
    Java
  • US$25 hourly

    • 5.0/5
    • (2 jobs)
    I’m a developer with experience in building both front end and back end for small and medium sized businesses. Whether you’re trying to win work, list your services or even create a whole online store – I can help! I’m experienced in Java, Spring, Hibernate, SQL, Docker, Jenkins, React, Angular, JavaScript, plain HTML and CSS I’ll fully project manage your brief from start to finish.
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    Jenkins
    Docker
    Apache Kafka
    Angular
    Redux
    CSS
    HTML
    React
    JavaScript
    MySQL
    PostgreSQL
    Spring Boot
    Java
  • US$45 hourly

    • 4.8/5
    • (114 jobs)
    Thanks for viewing my profile! I am a detailed and thorough professional with over 10+ years of extensive experience in Mobile application development. I specialize in delivering quality services with respect for strict deadlines. Both my experience and problem-solving skill made me an outstanding developer. I will apprehend your business requirements and will help you choose the right technology for your solution. Below are some of the domains and technologies I've worked on. 🎨 User Interface and User Experience Designing Figma, Invision Studio, Adobe XD, Adobe Illustrator, Adobe Photoshop, Sketch, Balsamiq, etc. 📱 Mobile Application Development (Native & Hybrid) Kotlin, Java, Swift, ObjectiveC, React Native, Flutter 📟 Augmented Reality (AR) Vuforia, ARKit, ARCore Let's meet and discuss how to convert your idea into reality using technology!
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    Graphic Design
    Dating Website
    Mobile UI Design
    Travel & Hospitality
    Health & Wellness
    Apple Xcode
    Mobile App Testing
    Kotlin
    Java
    Augmented Reality
    Android App Development
    Payment Functionality
    Swift
    iOS Development
  • US$120 hourly

    • 4.9/5
    • (10 jobs)
    10 years of experience working on native Android applications for high profile clients and businesses. 100% Job Success | 11,000+ Hours | Top Rated Plus | 5 Star Reviews Exclusively From planning, developing and publishing to maintaining and supporting high quality Android applications. I hope you see the experience displayed in my profile as an indication of my reliability. ✔︎ Constantly updating my knowledge with the most recent design patterns and code conventions; ✔︎ The delivery of a product that respects the highest standards of usability, performance and appearance is guaranteed; ✔︎ Great cost-benefit by delivering faster and higher quality products than the average; ✔︎ Flexible availability to always meet the client's needs. Vast experience managing development teams located in different places around the world. As an example, I've been managing a team that averaged 7 developers located in different countries, such as Canada, Ukraine, Pakistan, India and Brazil. ✅ Mobile Development Leader; ✅ Native Development; ✅ Kotlin and Java Expert; ✅ Clean code, DRY and KISS principles; ✅ Unit and automated testing; ✅ Well documented code; ✅ UI/UX Best Practices; ✅ NoSQL and SQL Databases; ✅ API Integration; ✅ Web Services Development. MySQL, SQLite, PostgreSQL, SQL Server, Firebase, Java, Kotlin, Android Studio, Android SDK, Android NDK, Device Owner, Play Store...
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    RESTful Architecture
    Android
    MySQL Programming
    Material Design
    Android SDK
    SQLite
    PHP
    Firebase Cloud Firestore
    Java
  • US$40 hourly

    • 5.0/5
    • (10 jobs)
    Creative back-end developer dedicated to building elegant solutions that meet business demands. Over 10 years of experience developing software of different scales ranging from small startups to large enterprise applications. Implemented back-end as well as front-end with the main focus on the former. Good communication skills proven through work experience in distributed team projects. 𝗕𝗮𝗰𝗸-𝗘𝗻𝗱 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀: Java, Kotlin JavaEE, Spring, Guice JDBC, JPA, Hibernate JUnit, Mockito, Cucumber, FitNesse Maven, Ant Git, SVN Jenkins, Sonar TypeScript, JavaScript Node.js Jest Webpack 𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲𝘀: MySQL, MariaDB, Oracle MongoDB, AWS DynamoDB 𝗖𝗹𝗼𝘂𝗱 𝗣𝗿𝗼𝘃𝗶𝗱𝗲𝗿𝘀: Amazon Web Services 𝗦𝗲𝗮𝗿𝗰𝗵 𝗘𝗻𝗴𝗶𝗻𝗲𝘀: Solr, AWS Elasticsearch 𝗙𝗿𝗼𝗻𝘁-𝗘𝗻𝗱 𝘁𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀: Vue HTML, CSS, Bootstrap Should you need any further information, please do not hesitate to contact me.
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    Distributed Computing
    Node.js
    Microservice
    Amazon Web Services
    NoSQL Database
    Spring Framework
    TypeScript
    Java
    JavaScript
    SQL
    MongoDB
  • US$25 hourly

    • 5.0/5
    • (33 jobs)
    Minecraft Server Developer Extraordinaire Hello, I'm Pawel, a seasoned Minecraft server developer with over 7 years of experience in crafting and optimizing immersive gaming environments. Expertise: 🛠️ Minecraft Server Development: Crafting robust servers and plugins, staying updated with the latest trends. 💻 Java Programming: Creating efficient, secure, and high-performance code. 🧰 Development Tools: Skilled in IntelliJ IDEA and managing databases with T-SQL and PL/SQL. ⚙️ Systems Management: Expert in managing and optimizing Minecraft server systems. 🌐 Server Technologies: Proficient in Paper (Spigot) and BungeeCord configuration. 🚀 Redis: Extensive knowledge in using Redis for caching, pub/sub messaging, and synchronizing multiple servers for real-time data consistency. 🔌 API Integration: Enhancing functionality and connectivity with API integrations. 🖥️ Swing Applications: Developing modern and functional Swing applications. 🤖 Additional Skills: Web scraping, automation, algorithm optimization, and bot development. Collaboration: Passionate about creating seamless Minecraft experiences. Let's collaborate to bring your Minecraft vision to life. Contact: Ready to transform your Minecraft project? Contact me today and let's craft extraordinary adventures together.
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    Proxmox VE
    System Administration
    Apache Maven
    Gradle
    Swing
    DNS
    Network Engineering
    Redis
    SQL
    Plugin Development
    JetBrains IntelliJ IDEA
    Minecraft
    phpMyAdmin
    Java
    Linux
  • US$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!
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    RESTful API
    Apple Xcode
    Android App Development
    iOS Development
    Firebase
    Kotlin
    Java
    PHP
    Firebase Realtime Database
    Swift
  • US$30 hourly

    • 4.2/5
    • (26 jobs)
    Senior Software developer professional bringing more than 11 years in software design, development and integration. Offering advanced knowledge of Java and Javascript programming languages for web and mobile applications.
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    Spring Framework
    Jakarta Server Faces
    HTML5
    Oracle PLSQL
    Jakarta Server Pages
    FFmpeg
    Wowza Media Server
    Android
    Python
    JavaScript
    Java
    Docker
  • US$10 hourly

    • 5.0/5
    • (1 job)
    Full stack developer. ▪ Both technical/architectural and business domain perception. ▪ 5 years of experience in j2ee & web technologies (spring, hibernate) with expertise in Software Development Life Cycle (Agile scrum) model including analysis, requirement engineering, architecture design, development, enhancements, testing, deployment and maintenance of standalone, Multi-tier, web-based and portals based object oriented enterprise applications. ▪ Having knowledge in back end database MySQL. ▪ Experience in SaaS architecture. ▪ Strong technical knowledge in Tomcat/ Apache implementation, support and performance tuning including Web server setup configuration. ▪ Proficient in JavaScript, jQuery, Angular. Basically, frameworks of one page application. ▪ Experience in managing AWS including EC2, securities. ▪ Experience in indexing and searching methods/tool – Elastic Search ▪ Experience in S3 bucket to manage physical storage ▪ Worked in the Accounting, IMS, Sales Tool ▪ Good working experience in HTML5/CSS3 with bootstrap – responsiveness of HTML page. ▪ OOP Concepts. ▪ Understanding of Design Patterns. REST web services. ▪ Worked on security level (oAuth) and JWT token for web services. ▪ Worked with Developers and Business Analysts to support defect analysis, reproduction, and resolution. ▪ Good team player for having cooperation with team members in project. ▪ Self-Initiator and can perform well as an individual.
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    AJAX
    Amazon EC2
    jQuery
    Amazon S3
    Angular
    Spring Framework
    Spring Boot
    Hibernate
    Java
    Spring MVC
    RESTful API
    MySQL
    Microservice
    Apache Tomcat
    Jenkins
  • US$45 hourly

    • 5.0/5
    • (60 jobs)
    With over 9 years of experience as a Mobile Developer, I bring to each project: ✓ Steadfast Commitment to Quality: Upholding the principle that excellence is the only standard, I approach every project with meticulous care and precision, ensuring outcomes that are not just completed, but masterfully executed. ✓ Passion for New Technologies: My enthusiasm for innovation drives me to continuously explore and integrate the latest trends and advancements in mobile development, keeping my solutions at the forefront of technology. ✓ Holistic Approach: Balancing innovation with reliability, I deliver projects that exceed client expectations, merging cutting-edge technology with dependable performance to create impactful solutions. ✓ Drive for Challenges: The dynamic and ever-evolving landscape of mobile development fuels my pursuit of new challenges and opportunities. Leveraging my extensive skills, I strive to make a significant difference in the mobile technology sphere, pushing boundaries and contributing to projects that set new benchmarks.
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    Android UI Design
    RESTful API
    Google Maps API
    JSON
    Core Java
    XML
    Android SDK
    Android App Development
    iOS Development
    Swift
    Kotlin
    iOS
    Android
    Java
    Firebase
  • US$75 hourly

    • 4.8/5
    • (11 jobs)
    Hello there, I'm Gaurav ✅ *Mobile development Expert* ✅ *Kotlin/Android, Flutter and React Native* ✅ *Developed and delivered apps with an overall rating of 4.8+ rating. and thousands of downloads* ✅ *Great communicator* ✅ *Adaptable to any time zone* ✅ *Fullstack enthusiast* I have been developing native Android apps for more than 8 years now. I have worked on different stages of mobile development - developing, architecting, and designing apps from scratch, migrating existing apps with the old codebase to use the modern android development approach, and updating popular apps by adding new features to the same in a modular and scalable way. Specialize in: * Creating timely deliverables * Architecture implementation * Third-party library/API integration * Ability to convert mockups to a functional app with attention to detail Skills : Android, Java, Kotlin, MVVM, Android architecture components, Reactive programming (RxJava/RxKotlin), Dependency Injection (Koin), Backend API integration (Retrofit2/Okhttp), Node.js, Express, Mongo, React.js, Php/MySql, Third-party API integration (Twilio, Stripe, Social Apps, etc), Material Design, Git. I am looking forward to working with you. Regards Gaurav Sarma
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    ChatGPT
    Chat & Messaging Software
    A/B Testing
    Flutter
    Android SDK
    Android App Development
    Push Notifications
    Mobile App Development
    Map Integration
    Material Design
    Android Studio
    Android
    Java
    Firebase
    Kotlin
  • US$45 hourly

    • 5.0/5
    • (16 jobs)
    Java\Kotlin\Android and Groovy\Grails developer. Work on HTML5 projects sometimes. As a hobby, I learn neural networks.
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    pandas
    PyTorch
    Android App Development
    Gradle
    Python
    Java
    HTML5
  • US$40 hourly

    • 5.0/5
    • (5 jobs)
    Hey there! 👋🏻 👨🏼‍💻 I'm an experienced Full Stack Developer, with expertise in both Web and Mobile Applications. I can also provide services in the area of scripting/automation (for example crypto trading bots, data scrapers, social media channel automation, etc.) Depending on the project, I could also provide services in terms of server configurations and deployments, as well as security consultancy and testing with no extra fees. Some keywords describing my areas of expertise are as follows: Backend development: - Java (Spring framework) ☕️ - NodeJS (ExpressJS) 📝 - Python (Flask) 🐍 Frontend + Mobile development: - ReactJS ⚛️ - Flutter 🎯 - Native Android (written in Java) 🤖 Cloud - deployment: - AWS ☁️ - GCP ☁️ - Docker 🐳 Database systems: - MySQL 🫙 - PostgreSQL 🐘 - MongoDB 🍃 My experience comes from both professional work and personal projects. If you're interested in working together, don't hesitate to hit me up! 🚀
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    Android
    Flutter
    Linux
    PostgreSQL
    React
    MongoDB
    Node.js
    JavaScript
    Python
    HTML
    Java
    CSS
  • US$25 hourly

    • 5.0/5
    • (76 jobs)
    I've completed 2000+ projects till now. Most of the projects are of mobile & desktop software development. I worked with most renowned companies of US and UK. I have 5 years of experience in Java, Python & Android Development. I'm also working as a Technical Team Lead in Apricot Technologies.
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    Web Development
    Algorithm Development
    Data Structures
    Apache Maven
    HTML
    Unified Modeling Language
    JavaFX
    WordPress
    Mobile App Development
    Java GUI
    Android
    C++
    Python
    Java
  • US$40 hourly

    • 4.6/5
    • (4 jobs)
    I have strong experience in web applications using .NET Web Forms, MVC, Java Spring MVC, Primefaces, Richfaces and other Java Server Faces frameworks. In addition, I have worked as a programmer in Unity, and using C++, Lua, and C# programming languages. I have been working as a developer for seven years and currently I am a EPiServer Certified Developer and pursuing a Sitecore certification. Knowledge: C++, C#, .NET 4.0, Web Forms. MVC .NET, Java, Swing, Angular JS, Python, JSF, JPA, EJB, Bootstrap, Unity 3D, SQL Server, MySQL, Oracle, MongoDB, Scrum, Power Designer, WCF, UML, Windows Phone and Android. Episerver MVP 2019
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    Jakarta Messaging
    CSS
    API Integration
    AJAX
    Microsoft SQL Server
    ASP.NET Core
    RESTful Architecture
    API
    Python
    C++
    C#
    Visual Basic
    Java
    ASP.NET
    ASP.NET MVC
  • US$23 hourly

    • 4.9/5
    • (53 jobs)
    Greetings! I am a highly experienced and top-rated mobile developer from Lviv with over 14,000 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 .
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    iOS SDK
    React Native
    Flutter
    In-App Purchases
    Java
    Objective-C
    Android App Development
    iOS Development
    Kotlin
    Swift
    Smartphone
    Mobile App Development
    SwiftUI
    Android
    iOS
  • US$30 hourly

    • 5.0/5
    • (15 jobs)
    I am a Software Engineer for 13 years expert in Coldfusion PHP and Wordpress. My skills includes the following - Programing ( ColdFusion, PHP, Java ) - Scripting (Javascript, jQuery, Mootols, Prototype, ReactJS, VueJS) - Database (MySQL, MsSQL) - CMS (Wordpress, Joomla, Drupal, Shopify) - CSS (Bootstrap) - Integrations (Single Sign On, Payment - Paypal, AffiniPay, BluePay, Authorize.net, eWay)
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    Adobe ColdFusion
    Payment Gateway Integration
    Web Development
    MySQL
    React
    SQL
    Vue.js
    Joomla
    jQuery
    PHP
    Java
    JavaScript
    AJAX
    WordPress
  • US$25 hourly

    • 5.0/5
    • (87 jobs)
    I'm a senior developer with 5+ years of experience in developing apps on iOS and Android. And now I'm very happy to see my profile is TOP RATED PLUS on Upwork. I have created many apps with high quality and affordable prices. Over the past 4 years, I have satisfied all of my clients when making their ideas come to life with really great apps. Please review my portfolio and client's feedback to see the testimonials. My experience with iOS and Android development: - Swift / Objective-C - Java - SDK and API add for the native app - Social Networking app - UIKit, CoreFoundation, CoreData, iAd, MapKit, CoreLocation, CoreGraphics, StoreKit - Ads - Payment gateway and In-App purchase - Location tracking - Image/Video processing - Other frameworks I was a creative person before I became a developer. As such, I have an eye for design, mobile analytics and QT/Testing. Hope you will contact me for your project! Thanks
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    iPad App Development
    Business with 1-9 Employees
    iOS SDK
    Android SDK
    Android App Development
    iOS Development
    In-App Purchases
    In-App Advertising
    Java
    Swift
    Objective-C
  • US$160 hourly

    • 5.0/5
    • (8 jobs)
    I am an experienced, versatile, and creative full-stack software engineer with extensive experience in designing and building innovative technology solutions to solve complex problems. HireRight, 8/3/23, EFE, DF9742BFF305B507A30CB5BC320A2E71
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    Quantitative Analysis
    API Development
    Vue.js
    JavaScript
    React
    Java
    HTML5
    AngularJS
    TypeScript
  • US$40 hourly

    • 5.0/5
    • (21 jobs)
    With over 8 years of experience as an Oracle certified developer, I specialize in JavaFX desktop application development, boasting expert knowledge of the JavaFX framework. My forte lies in applying architectural patterns and adhering to best practices, resulting in the creation of clean, expandable code for your projects. I am passionate about delivering robust and user-friendly applications, always striving to guarantee client satisfaction. My dedication extends beyond technical expertise; I am also a proficient communicator and an effective team player, ensuring seamless collaboration on every project. In addition to my core skills, I am well-versed in essential development tools like Git, Maven, Gradle, Eclipse, IntelliJ IDEA, and JProfiler. This comprehensive skill set enables me to navigate your projects with precision and efficiency. Let's work together to transform your Java development goals into reality.
    vsuc_fltilesrefresh_TrophyIcon Glassfish Developers
    JetBrains IntelliJ IDEA
    Desktop Application
    JavaFX
    OpenGL
    MQTT
    User Interface Design
    Game Development
    SQL
    Git
    Java
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