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based on 27,630 client reviews
  • $50 hourly

    • 5.0/5
    • (118 jobs)
    My name is Saul Hidalgo, a Computer Engineer with a passion for developing Java and .Net software. I have been fortunate to work with exceptional teams and have had the opportunity to contribute to various sectors, including National Security/Defense in the United Kingdom, Oil companies, and Universities such as Harvard Business Publishing. The software I have created is currently being successfully utilized by these organizations. I thrive on new challenges and continuously seek opportunities to expand my skills. You can explore my public contributions on my GitHub account: saulhidalgoaular. Below are my areas of expertise and skills: 1. Code Translation and Conversion: - Proficient in translating code across various languages, with expertise in Python, Java, Delphi, C++, and C#. 2. Document Management System (DMS) - OpenKM: - Extensive experience in developing workflows, automations, cron tasks, and integrations using the Java/PHP API. - Configuration of daily backups. - Skilled in utilizing OpenKM as a DMS. 3. Algorithms and Programming: - Strong command over algorithms and programming skills, particularly in C/C++ and Java. - In-depth knowledge of data structures, strings, sorting, arithmetic and algebra, combinatorics, number theory, backtracking, graph traversal, algorithms for graphs, dynamic programming, and computational geometry. 4. Accounting: - Well-versed in managing material movement between stores and shops. - Proficient in handling retail-related accounting tasks. 5. Point of Sale (POS) Area: - Experience in integrating POS software with label printers, fiscal printers, barcode readers, fingerprint scanners, and keyboards.
    vsuc_fltilesrefresh_TrophyIcon Java Persistence API (JPA) Developers
    Core Java
    Microsoft Excel
    Document Management System
    API
    Algorithm Development
    Data Structures
    API Development
    Hibernate
    Object-Oriented Programming
    Java
    .NET Framework
    MySQL
    Desktop Application
    C++
  • $105 hourly

    • 4.7/5
    • (734 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 Java Persistence API (JPA) 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
  • $20 hourly

    • 5.0/5
    • (66 jobs)
    🏅 Top Rated Freelancer Hello !!! I’m a Software Engineer specialised in Backend Development with over 6+ years of working experience mostly working on Spring Framework. Hands-on design, development, implementation, and optimisation of the application. Use Object-oriented techniques and Software engineering best practices including Design review, Code review, and Code re-factoring. Experienced with the full Software development life cycle (SDLC) including - Requirement gathering - Prototyping (Design, Development & Debugging) - Testing and - Deployment Good experience in Agile software development methodologies (Scrum, Sprint plan, Timeline, etc.). The strong idea about the deployment process and tools like Maven, Jenkins. 🌟 My Specialization 🌟 ✅ Java (8, 11 & 17): JavaSE, JavaFx, JDBC, Swing, Java Beans, Java Mail. ✅ Java Ee Family: EJB, JPA, Hibernate, CDI, Servlets, RESTful Services (JAX-RS), SOAP Services (JAX-WS), Apache CXF & Bean Validation. ✅ Java Ee Web: JSF, JSP, Thymeleaf, Bootsfaces & Primesfaces. ✅ Spring Family: Spring MVC, Spring Boot (Data, Rest, Vault, Security & Cloud [Microservices etc.]). ✅ SQL: MySQL, PostgreSQL, MariaDB & Oracle ✅ NoSQL: MongoDB & Redis ✅ AWS: IAM, EC2, S3, RDS, Lambda, Elastic Beanstalk etc. ✅ Oracle Cloud Infrastructure (OCI): Compute Service & Autonomous JSON Database ✅ Message Queues: ActiveMQ & RabbitMQ. ✅ Networking: WebSocket (Stomp & SockJs), Socket & RMI. ✅ Testing: JUnit, Spring Test, Mockito, Integration Test, Unit Test. ✅ Versioning: Git, Github, BitBucket & VisualSVN. ✅ DevOps: Docker, Docker Compose & Jenkins. ✅ Web: HTML, CSS, SASS, Javascript, React Js, Bootstrap & Material UI. 🌟 WHY CHOOSE ME OVER OTHER FREELANCERS? 🌟 ✅ Client Reviews: I focus on providing VALUE to all of my Clients and Earning their TRUST. The Client Reviews and Feedback on my Profile are critical to me. ✅ Over-Delivering: My focus is on PROVIDING more than what I expect to RECEIVE. I take pride in leaving all of my Clients saying "Great Work." ✅ Responsiveness: Being responsive and keeping all lines of communication readily open with my Clients.
    vsuc_fltilesrefresh_TrophyIcon Java Persistence API (JPA) Developers
    JavaFX
    Technology Tutoring
    Jakarta EE
    API Development
    Java
    MySQL
    Java Persistence API
    MongoDB
    RESTful API
    React
    Spring Boot
    PrimeFaces
    PostgreSQL
    Docker
    JUnit
  • $50 hourly

    • 5.0/5
    • (4 jobs)
    Having 10 years of experience of commercial and enterprise application development mainly Java Spring applications with technology stacks such as: - Java Spring (Boot) framework - Hibernate ORM - Relational database (SQL Server, MySQL/MariaDB) - AWS or GCP Involved and developed various type of project and application such as: - IoT application - Desktop Point Of Sales - Mobile (Android) application - Company Project Calculation System - Database content migration and processing tool - Mobile Point Of Sales - Back End / Web Service / API & Web Scraping
    vsuc_fltilesrefresh_TrophyIcon Java Persistence API (JPA) Developers
    AWS Lambda
    Spring Data
    Apache Kafka
    Spring Boot
    Hibernate
    Relational Database
    jQuery
    Data Scraping
    Responsive Design
    PostgreSQL
    MySQL
    Java
    Node.js
    Android App Development
    Spring Framework
  • $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 Java Persistence API (JPA) Developers
    Distributed Computing
    Node.js
    Microservice
    Amazon Web Services
    NoSQL Database
    Spring Framework
    TypeScript
    Java
    JavaScript
    SQL
    MongoDB
  • $20 hourly

    • 4.9/5
    • (51 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 Java Persistence API (JPA) 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
  • $45 hourly

    • 5.0/5
    • (7 jobs)
    A developer with 15+ years of IT experience from development to management. Here is a dedicated and versatile developer for your project with experience in 🟢 JAVA 🟢 PHP 🟢 Python 🟢 Docker 🟢 Spring Boot 🟢 Symfony 🟢 Laravel and various web frameworks My skill set includes: ✔ Strong knowledge of JAVA and PHP, and mostly worked Spring Boot and Symfony/Laravel frameworks ✔ In-depth understanding of SQL/NoSQL databases, mostly worked with PostgreSQL, MySQL, MongoDB ✔ Experience working with serverless solutions and third-party integrations ✔ Familiarity with software development tools and practices, including GitHub and JIRA ✔ Comprehensive knowledge of the software development life-cycle, including technical documentation ✔ Expertise in developing, testing, and debugging web applications and adding new features ✔ I have a proven ability to collaborate effectively with team members, troubleshoot issues, and improve back-end applications and processes. My main goal is to provide automated solutions that enhance efficiency and productivity. I look forward to the opportunity to work on exciting projects and contribute to our mutual success. Please feel free to reach out for 15 minutes free talk, if you need any additional information.
    vsuc_fltilesrefresh_TrophyIcon Java Persistence API (JPA) Developers
    PostgreSQL
    RESTful API
    MySQL
    React
    Next.js
    RabbitMQ
    Docker
    Spring Boot
    Java
  • $25 hourly

    • 4.8/5
    • (177 jobs)
    Thanks for visiting my profile. I have been doing Mobile App development for the past 5+ years, I have plenty of experience and a great eye for app development. I had already completed all job perfectly and I have many experience of developing mobile app and back end communication server building. I am able to offer competitive prices and deliver great work. I would like to work with you. I will provide the best product to you as you wanted. Key features : * Quality work * Always online status for communication * Full Support * On time delivery
    vsuc_fltilesrefresh_TrophyIcon Java Persistence API (JPA) Developers
    Fire OS
    Android SDK
    Mobile App Development
    Android App Development
    Tablet
    Camera
    API Integration
    Firebase
    Location-Based Service
    Android
    Java
    Kotlin
    TV Set
    SQLite
    Native App Development
  • $15 hourly

    • 5.0/5
    • (2 jobs)
    Dedicated and adaptable junior software developer eager to contribute my technical skills and enthusiasm to a dynamic team. Seeking a position that encourages continuous learning, where I can leverage my existing expertise while embracing new technologies to enhance my capabilities. Committed to collaborating with team members to achieve collective goals and contribute to the success of innovative projects.
    vsuc_fltilesrefresh_TrophyIcon Java Persistence API (JPA) Developers
    HTML
    Next.js
    Golang
    TypeScript
    JavaScript
    Mobile App Development
    Android App Development
    PostgreSQL
    User Authentication
    Android
    Android Studio
    Firebase
    Java
    Kotlin
    SQLite
  • $50 hourly

    • 5.0/5
    • (39 jobs)
    I am a Java Developer with 7+ years of professional experience in developing Web and Enterprise Applications using technologies like Java / J2EE, Spring, REST ,SOAP webservices, Struts, Hibernate, iBatis, JavaScript, jQuery. I have experience as a Full-Stack developer with more emphasis on the backend. I was part of the Order Management System team for Sears Holdings, which is the system which manages an order placed in Sears and Kmart sites till it is fulfilled to the customer, by communicating with multiple systems. Improved the efficiency of the orders sent to Kmart store system by designing and implementing a Merchandise Pickup subsystem which allows the orders to be held during the store closed hours. I was selected under Wipro Technologies' STAR Hire Program 2014. I was part of the team that designed and implemented a Dealer Management System for Mahindra & Mahindra, which is a centralized application that captures customer, vehicle and inventory information to facilitate better inventory management and provide visibility on dealer operations. I was also part of NextGen Medicare Advantage Team, which provides real-time eligibility and enrolment, member management, financial reconciliation and encounter data services to Medicare Advantage, compliant with CMS requirements.
    vsuc_fltilesrefresh_TrophyIcon Java Persistence API (JPA) Developers
    AWS Fargate
    Object-Oriented Programming
    J2EE
    Android App Development
    SOAP
    Software Architecture & Design
    Docker
    PostgreSQL
    SQL
    Spring Boot
    MySQL
    Apache Maven
    Hibernate
    Java
    Spring Framework
  • $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
    vsuc_fltilesrefresh_TrophyIcon Java Persistence API (JPA) Developers
    Android SDK
    Mobile App Development
    Android App Development
    Firebase
    Smartphone
    Android
    Flutter
    Java
    Kotlin
  • $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 Java Persistence API (JPA) Developers
    JetBrains IntelliJ IDEA
    Desktop Application
    JavaFX
    OpenGL
    MQTT
    User Interface Design
    Game Development
    SQL
    Git
    Java
  • $50 hourly

    • 5.0/5
    • (58 jobs)
    Native Android Developer | Java & Kotlin 🚀 Top Rated Plus 💯 100% Job Success Score 8+ years of experience working on native Android applications for high profile clients and businesses. I've strong Java/Kotlin programming skills including low-level performance optimizations and memory management. ✔ Ml-kit, OpenCv, TensorFlow, Camera, Image Processing ✔ Clean Architecture, MVVM, Firebase, Coroutines, Live data, DataBinding, Dagger2/Hilt, Room, Retrofit, Glide, Payments 🚀 Why Choose Me? 8+ Years of Servicing High-Profile Clients Strong Java/Kotlin Programming Skills Developer with a Keen Eye on Technological Advancements Detail-Oriented and Timely Deliveries
    vsuc_fltilesrefresh_TrophyIcon Java Persistence API (JPA) Developers
    Android App
    Android Studio
    Native App Development
    Firebase
    Java
    Android App Development
    Kotlin
    Android
    Mobile App Development
    SQLite
    Camera Operation
    NFC
    Mobile App
    Android SDK
    OpenCV
  • $100 hourly

    • 5.0/5
    • (6 jobs)
    I am a software engineer with 20 years of experience in multiple industry. I am a very passionate and an excellent problem solver. I work with Java 11 using Spring, Elastic Search, Jersey, Hibernate, Postresql , Mysql and ActiveMQ. I also have a lot of experience in AWS services such as Cloudformation, DynamoDB, Lambda, SQS , RDS. I have the AWS developer associate certification.
    vsuc_fltilesrefresh_TrophyIcon Java Persistence API (JPA) Developers
    PostgreSQL Programming
    Linux System Administration
    Apache ActiveMQ
    Amazon Elastic Beanstalk
    AWS Lambda
    Hibernate
    Java
    Oracle Database
    Docker
    RESTful API
  • $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!
    vsuc_fltilesrefresh_TrophyIcon Java Persistence API (JPA) Developers
    Kotlin
    Android
    Android SDK
    Realm Database
    Multithreaded Programming
    Java
    Material Design
    Android App Development
  • $50 hourly

    • 5.0/5
    • (12 jobs)
    My areas of expertise: • Native Android apps with Kotlin/Java • Cross-platform apps (Android/iOS) with Flutter • Firebase as a backend (BaaS) My experience: • 8 years as a mobile developer • 5+ years on Upwork • 15 apps in total, with a focus on long-term projects • Started with Java (Android), transitioned to Kotlin (Android) and later Flutter (iOS/Android) • Worked in different environments: startups and established companies, as a solo developer and within medium to large teams. What I offer: • Efficiency: leaning on my experience, I'm able to work efficiently and deliver results quickly. • Reliability and Timely communication: I maintain a consistent work schedule so tasks get done on time, and you can also expect prompt replies when I'm online from 1am to 4pm (UTC). • Code quality and App architecture: I know how to prevent technical debt. I have a good eye for identifying suboptimal solutions and coding practices, and I understand the general guidelines that any codebase should follow. • Proactivity and Responsibility for my work: I try to understand not only how to build something but also why it is being built, so I can positively contribute to all aspects of product development. Ultimately, I try to help as much as I can in building a great product.
    vsuc_fltilesrefresh_TrophyIcon Java Persistence API (JPA) Developers
    Java
    Dart
    Kotlin
    iOS Development
    Hybrid App Development
    Flutter
    Mobile App Development
    Android App
    Android SDK
    Firebase
    Android
    Android App Development
  • $35 hourly

    • 5.0/5
    • (5 jobs)
    I'm working as software developer. I'm coding Java, C# and PHP. About Me: Java, C#, PHP, Devops, Docker, E-Signature - Java * Spring, Spring Boot, * Spring Data, Spring REST, Spring Web Services * Spring Security, Spring JMS, Spring Cache, Spring AMQP * SOAP and REST API * Hibernate and JPA (ORM) * Hazelcast and Redis * Elasticsearch * ActiveMQ, RabbitMQ * MYQL, Postgresql, Percona Cluster - C# (.NET) * Entity Framework * Windows Form Application * Class Library * WCF Webservice * REST API (ASP.NET Web APIs) * Microsoft SQL - PHP * Codeigniter - Electronic Signature * iTextPDF * Bouncycastle (.NET and Java) * Pkcs11 (Smartcard, HSM) * OpenSSL * CAdES, XAdES, PAdES Programming * E-Signature ETSI Standards and Specifications * SignServer, EJBCA installation and configuration - Devops * Jenkins (CI/CD) * Nexus Reposiyory * Docker Swarm and Kubernetes * Dockerize Java, C#, NodeJS, Gradle, PHP Apps * Gitlab CI/CD * Github Action (CI/CD) * CircleCI (CI/CD) * TravisCI (CI/CD) * Azure DevOps (CI/CD) - Operating Systems * Linux * Fedora * Ubuntu * CentOS * Windows * MacOSX - Tools * IDE: Visual Studio, Eclipse, IntelliJ IDEA, Visual Studio Code, Phpstorm * Version Control: SVN, Git * JIRA, Gitlab, Redmine
    vsuc_fltilesrefresh_TrophyIcon Java Persistence API (JPA) Developers
    Spring Framework
    Docker
    DevOps
    Spring Boot
    Jenkins
    CI/CD
    GitLab
    Google Cloud Platform
    Java
    Hibernate
    C#
    SOAP
    Linux System Administration
    Linux
    PHP
  • $75 hourly

    • 4.9/5
    • (62 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.
    vsuc_fltilesrefresh_TrophyIcon Java Persistence API (JPA) Developers
    ChatGPT
    Google Cloud Platform
    User Profile Creation
    Location-Based Service
    Firebase
    Amazon Web Services
    Node.js
    Java
    Kotlin
    Swift
    iOS Development
    iOS
    Android App Development
    Android
    Mobile App Development
  • $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 Java Persistence API (JPA) Developers
    RESTful Architecture
    Android
    MySQL Programming
    Material Design
    Android SDK
    SQLite
    PHP
    Firebase Cloud Firestore
    Java
  • $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 Java Persistence API (JPA) Developers
    pandas
    Microsoft Power BI
    Python
    Dart
    In-App Search
    Node.js
    Ruby on Rails
    CSS
    HTML
    Java
    C#
    Android
    Angular
    JavaScript
    Flutter
  • $30 hourly

    • 5.0/5
    • (26 jobs)
    I have 11 years experience in software development. My technology stack are as follows: - VueJS/Next.js/React/Astro - TypeScript - NodeJS - PHP - Custom/Laravel - TailwindCSS - Bootstrap - JQuery - Docker - CircleCI (CI/CD) - Github Actions - Serverless - AWS Services - Java (Android development) - Server Management - Ubuntu & Windows - Shell/Bash Scripting (deployment automation) I am keen to details, and I work hard to provide beyond expectations. Let's work together.
    vsuc_fltilesrefresh_TrophyIcon Java Persistence API (JPA) Developers
    Docker Compose
    AWS CloudFormation
    Amazon ECS
    AWS Lambda
    Next.js
    React
    CircleCI
    PHP
    Vue.js
    Laravel
    Amazon Web Services
    Java
    Docker
    JavaScript
    Node.js
  • $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 Java Persistence API (JPA) Developers
    RESTful API
    Apple Xcode
    Android App Development
    iOS Development
    Firebase
    Kotlin
    Java
    PHP
    Firebase Realtime Database
    Swift
  • $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 Java Persistence API (JPA) Developers
    HTML5
    CSS 3
    C++
    Java
    MySQL
    React
    Bot Development
    Automation
    Data Scraping
    Python
    PHP
    Data Extraction
    Web Crawling
    JavaScript
    Selenium
  • $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 Java Persistence API (JPA) 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
  • $35 hourly

    • 5.0/5
    • (20 jobs)
    I am a Software Developer with around ten years of experience in Java, developing both the back-end and front-end of multiple software solutions. I have experience with each layer of development, from creating database structures and stored procedures to designing and developing the user interface of the applications. My knowledge and experience includes: - Programming languages: Java, PHP, C#, Python. - Frontend frameworks/ technologies: ZK, Vaadin, JSP, HTML5, Jquery, Javascript, AngularJS, AJAX. - Backend frameworks: Spring, Spring Security, Spring Batch, JSF, Hibernate, Mybatis. - Versioning Control: Git, SVN. - Databases: Oracle, MySQL, SQLite, SQL Server, Oracle Database, PostgreSQL - SOAP and REST web services - Tools: Maven, Ivy, JasperReports I'm always motivated with the idea of new challenges and learning new technologies. I'm willing to make the best effort to do an excellent job, even if it takes extra work researching the way to solve a problem. I have several years working on financial institutions, so I have experience working under pressure, meeting really strict deadlines and communicating with the users to evaluate options and generating solutions for their needs. I'm used to work as a team member as well as independently, following instructions or coming up with the solutions that best suites the needs of the business.
    vsuc_fltilesrefresh_TrophyIcon Java Persistence API (JPA) Developers
    Tableau
    ZK Framework
    API Integration
    API
    Database Architecture
    Spring Boot
    RESTful Architecture
    Database Design
    Web Application
    Vaadin
    MySQL
    Java
    Spring Framework
    iBATIS
    RESTful API
  • $15 hourly

    • 5.0/5
    • (19 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.
    vsuc_fltilesrefresh_TrophyIcon Java Persistence API (JPA) Developers
    Android SDK
    Laravel
    Android
    Kotlin
    Java
    Android App Development
    Node.js
  • $50 hourly

    • 5.0/5
    • (27 jobs)
    I'm a full stack software developer with experience in Java and Android projects. I focus on service and delivering the best experience to my clients, while providing quality software on a timely fashion. I have experience with various technologies to help fulfill any kind of job. I'm also open to having a chat with my customers, if they so desire, so we can arrange any details about the job. I also have experience with Cyclos Banking System Software, providing consultant services to small-medium banks. I've done several integrations with 3rd parties software with it, also developed plenty of aditional feature for it too, like bank statements and import of payments. I have experience on the following languages and technologies: -Java: Everything enterprise, Servlets, JSF, Primefaces and JPA. -JavaScript: pure Script, NodeJS and AngularJS. -PostgreSQL, SQLServer, SQLLite I also have experience providing products and solutions for financial institutions. My biggest desire is to serve my customers as if it was me requesting the product, I always strive to deliver the best software since I wouldn't settle for less.
    vsuc_fltilesrefresh_TrophyIcon Java Persistence API (JPA) Developers
    Email Campaign Setup
    J2EE
    Android App Development
    Microsoft SQL Server Programming
    API Development
    MySQL Programming
    Java Servlet API
    JavaScript
    Java
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