Hire the best Core Java developers

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Clients rate Core Java developers
Rating is 4.8 out of 5.
4.8/5
based on 307 client reviews
  • $40 hourly
    I have been working as a Java developer for 6 years. As I am new to Upwork, completing jobs according to the client's requirements is not only my duty but it is my necessity. Client satisfaction will be my first preference. It's important to me to build long term relationships with clients, so I'm primarily looking for long term projects. I'm flexible with my working hours and am happy to work closely with any existing freelancers you work with. I have 5+ years of experience in Web application development, Blockchain, Trading Platforms, Web Scraping, Microservice architecture, and Scripting. Worked on E-commerce apps, GPS Monitoring Servers, Crypto Exchanges, Blockchain. Experience on OAuth2, Facebook, Google, Twitter, Google Maps integration and Spring Security. Please connect with us for a safe business and for better product delivery on time. Instead of making false promises or writing big slogans let's start work.
    vsuc_fltilesrefresh_TrophyIcon Core Java
    Git
    Jakarta Server Pages
    Java
    Vue.js
    RESTful API
    Microservice
    Angular
    Web Application
    Spring Security
    Spring Boot
    React
    OAuth
    Scripts & Utilities
    JavaScript
    Ext JS
  • $30 hourly
    I offer premium service to my clients. Extensive success developing for both IOS and Android platforms for individual clients sets me apart from other professionals. I bring a wealth of experience and skills to the table With 7 years of experience as a highly-qualified professional, I have been dedicated to developing mobile applications for Android, iPhone, and iPad. Key Highlights: Proven Track Record: I have successfully launched over 45 projects, covering a wide range of domains and technologies. My experience spans from simple apps to complex and intricate projects. Process-Oriented Approach: My primary objective is to apply a process-oriented approach that combines my extensive experience and creativity to find the most productive solutions and achieve successful results. Collaborative Skills: I excel in working closely with offshore clients, ensuring effective communication and collaboration. Technological Proficiency: My strengths include flexibility and staying at the forefront of emerging technologies, which allows me to guarantee high-quality work. Experience with Web Development - HTML - JavaScript - CSS Experience with iOS technologies: - Xcode, Objective-C- databases: CoreData( MagicalRecords including), SQLite - internet and server side interactions(AFNetworking library): REST API, SOAP, JSON, Parse, Google API - maps: iOS MapKit Framework, Google Maps API, Yandex SDK - social networks: Twitter API, Facebook SDK, VK SDK - storage: local storage, cloud storage (icloud, dropbox) - multimedia (photo, video, audio)- tools: Redmine, Git, SVN, SoapUI, DBMS (database management systems), Crashlytics - notification/reminders: Local Notifications / APNS,EventKitUI - in-app purchases - iAd Experience with Android technologies: - Android studio, Java- Google Play Services and Patterns - Android libraries: Android Support Design Library, Android Support Library (v4, v7 appcompat, v7 cardview, v7 recyclerview), ActiveAndroid, RxJava, Retrofit, Picasso, UIL, ButterKnife, EventBus, Amazon - databases: Amazon DynamoDB, SQLite, Couchbase Lite Android - storage: local storage, cloud storage (Amazon S3, Couchbase Lite Android, dropbox) - multimedia (photo, video, audio) - tools: - Redmine, Git, SVN, SoapUI, DBMS (database management systems), Crashlytics - internet and server side interactions(AFNetworking library): REST API, SOAP, JSON, Parse, Local/Push-Notifications, Google API, GSON, GeoJson, Amazon SNS - MVP - Google Android Maps Utils - in-app purchases I am a Top rated Plus and Expert Vetted, I have maintained 100% customer satisfaction and repeat business by genuinely caring about my clients product , budget , and communication needs. I am passionate about mobile development, and that always comes across in the quality of work . Outside of development , I have 7 years of experience at the executive level in information Technology . This translates into strong business accumen and experience managing budgets , projects both locally and off-shore. Robust technology and business experience combine for a strong project outcomes no matters the size. I welcome discussing your projects and helping you find a success. I encourage you to check out my Upwork Profile. It will give you a good understanding of who I am and what I do.
    vsuc_fltilesrefresh_TrophyIcon Core Java
    iPad App Development
    3D Animation
    Autodesk 3ds Max
    iOS Development
    Unity
    WebRTC
    Android
    Firebase
    Java
  • $30 hourly
    I'm a software enginrer - java developer With +7 years of experience who has the passion and motivation to make valuable things that everyone can use and learn from it and be a role of change. I am focusing on designing and developing solutions for problems and challenges using my Java skills with analytical and problem-solving skills. I Holds B.Sc. in Computer Science, Faculty of Computers and Information, in 2016. I am specializing in back-end development, with good knowledge of front-end techniques. I love structure and order, and I also stand for quality. I Love spending time fixing little details and optimizing Java Apps. For easy contact, that's my Skype Name:- mohamed.hamid660 Thank you
    vsuc_fltilesrefresh_TrophyIcon Core Java
    Oracle
    SOAP
    JavaFX
    Agile Software Development
    Elasticsearch
    MySQL
    Spring Security
    Database
    Apache Maven
    Spring Boot
    Java
    Spring Framework
    Microservice
    Jakarta Server Pages
    Hibernate
  • $35 hourly
    10+ Year Experience | 6000+ Hours work | 50+ Mobile Application | Individual Extensive success developing for the Flutter platform for individual clients as well as larger companies. Expert development for Android, iPhone, iPad using Flutter, Kotlin, and Swift. I have launched my apps into the store that have reached Top status, and I have worked with individuals (including many first-timers!) and larger companies on apps from MVP to those with user bases into the tens of millions. I have created and improved dozens of successful applications for clients in the areas of social networking, education, entertainment, self-help, fitness, lifestyle, and commerce. I have In-depth knowledge of industry practices and application development protocols. How can I help you: - Build an app from ideation to MVP and beyond - Revive, update or fix existing applications in need of care and feeding - Integrate new or existing applications into popular back-ends like Firebase | AWS | Azure - Get previously stalled app development efforts over the finish line - Consult on feature possibilities, App Store guidelines, and monetisation strategies - Perform code reviews, Write Unit, Bloc, UI or Integration test-case I am Top Rated Plus. I have maintained 100% customer satisfaction and repeat business by genuinely caring about my client's product, budget, and communication needs. I am passionate about mobile development, and that always comes across in the quality of my work, Updating knowledge and skills through continuous learning is the key. Expert Flutter Developer | Flutter Development | Mobile Full Stack Developer | Mobile Development
    vsuc_fltilesrefresh_TrophyIcon Core Java
    Stripe
    Web Application
    CI/CD Platform
    Mobile App Redesign
    Android App Development
    Mobile App Development
    In-App Purchases
    Dart
    Flutter
    Android
    Hybrid App Development
    Native App Development
  • $30 hourly
    Hey everyone ,,, I'm a java web developer , i have 4+ years of experience in desktop and web applications development i'm here to meet new clients and have more challenges . Yasser
    vsuc_fltilesrefresh_TrophyIcon Core Java
    Angular 6
    NetBeans
    SOAP
    JavaFX
    MySQL Programming
    Servlet
    RESTful API
    Spring Boot
    Oracle Database
    Spring MVC
    Hibernate
    MySQL
    Angular
    Spring Framework
    MongoDB
  • $60 hourly
    Specialized Java and certified SnapLogic developer, practicing java for more than 4 years and Data Integration (SnapLogic) almost 3 years. You can see/verify my certification in certification section bellow. Also for my self I could say that I'm Salesforce enthusiast, every spare free time I used for learning Salesforce platform. Highly motivated and hardworking, willing to learn new skills also eager to absorb as much knowledge and insight as possible ability to maintain high level of confidentiality. I have good work ethic, capable to work with a team, always on time(fulfill deadlines).
    vsuc_fltilesrefresh_TrophyIcon Core Java
    Apache Kafka
    XML
    API Integration
    JSON
    Apache Maven
    Spring Integration
    Salesforce
    Gradle
    SnapLogic
    Spring Boot
    API
    CSS
    SQL
    JavaScript
    HTML
    Java
  • $25 hourly
    I'm a full-stack Ruby on Rails developer with over 5 years of programming experience. Since 2017, It's a pleasure for me to design applications that have aided, developed and added value to digital brands and a variety of projects requiring both front-end and back-end development. I'm also familiar with AWS services. Scrum was used to develop almost every project I worked on. My technology stack: Backend: Ruby, Ruby on Rails Frontend: JS, jQuery, CSS3, HTML5, React, Angular, Bootstrap 3 | 4 Databases: MySQL, PostgreSQL, Redis, Elasticsearch Testing: RSpec. Payment system integration: Stripe, Paypal, Braintree, etc Version Control: Github, Bitbucket Restful API, Microservices Development Others: Linux My approach: - a problem solver - familiar with best programming practices and agile project development Other: * Experience with Shopify theme and App Development * Experience with Agile Methodologies * Designing of high load web apps * Experience with Ecommerce Systems * Rspec Testing Thank you for reviewing my Upwork profile. Looking forward to working with you. Ali Haider
    vsuc_fltilesrefresh_TrophyIcon Core Java
    Shopify Plus
    Shopify Apps
    Shopify Theme
    API Development
    Angular
    Elasticsearch
    Ruby on Rails
    Database Architecture
    Node.js
    SaaS
    Database Management
    React
    Ruby
    JavaScript
    Shopify
  • $80 hourly
    Hi there! I am an experienced Python developer with a focus on algorithmic trading. I have over 5 years of professional experience in the field and a strong background in computer science. I have a strong foundation in Python programming and am proficient in various libraries and tools such as NumPy, Pandas, CCXT, Backtrader, Quantlib, Postgresql, MongoDB, Django, FastAPI, CI/CD, and Nginx. I have extensive experience in building and implementing trading strategies, analyzing market data, and using automated trading systems. In addition to my algorithmic trading skills, I have also worked on a wide range of projects, including web development, data analysis, and machine learning. I am a proactive and detail-oriented developer who is always eager to learn and take on new challenges. I have excellent problem-solving skills and the ability to work effectively in a team or independently. In my previous roles, I have successfully delivered projects on time and within budget, and have received positive feedback from clients for my high-quality work and dedication to meeting their needs. I am excited to bring my skills and experience to your project and contribute to its success. Thank you for considering my profile.
    vsuc_fltilesrefresh_TrophyIcon Core Java
    PostgreSQL
    MongoDB
    Celery
    NGINX
    Django
    Ubuntu
    CI/CD
    Redis
    Flask
    pandas
    Python
    NumPy
  • $50 hourly
    I am a trustworthy, enthusiastic, and experienced WordPress and dotNet (C#) developer in America’s time zone with 15 years of experience in web development after another 15 years in related fields, so I am also knowledgable in SysAdmin tasks to help you with the hosting/DNS issues altogether. I have been working mostly with marketing agencies in the USA during my last 12 years and I build long-term relationships with my clients so rest assured, you’ll be in good hands by hiring my services. As for my academic background, I hold a Computer Science degree as well as a Master’s Degree from the University of Tampa in the USA so I’m fluent both in English and Spanish and I communicate frequently with my clients during project execution that way you’ll be constantly informed about progress while working together.
    vsuc_fltilesrefresh_TrophyIcon Core Java
    Elementor
    .NET Core
    .NET Framework
    WordPress Consultation
    DNS
    PSD to HTML
    WordPress Development
    PSD to WordPress
    WordPress Website
    WordPress Installation
    C#
    WordPress
    WordPress Theme
  • $30 hourly
    Passionate programmer, ever hungry to learn and earn. I have a CAN DO attitude and i am a dedicated learner. EXPERIENCE : 9 Years Backend Skills : * Java * Grails * Node * Groovy * Spring * Hibernate * AWS Frontend Skills : * Javascript * React * Redux * AngularJs * HighCharts * Html * Sass, Less Databases : * Mysql * Mongo * Elastic Search * Snowflake
    vsuc_fltilesrefresh_TrophyIcon Core Java
    Agile Software Development
    Elasticsearch
    RESTful API
    Software Architecture & Design
    Web Development
    React
    AngularJS
    Grails
    JavaScript
    Java
    HTML5
    MongoDB
    Spring Framework
    AJAX
  • $12 hourly
    Good Day! This is md mazaharul Islam. working as a freelancer in web development. I have experience in php, laravel, react js, vue js, wordpress. I have 10 years working experience in programming. Client's satisfaction is my top priority. 100% Quality, Commitment, Accuracy & satisfaction. If you would like high quality work with a fast turn around for a fair price, contact me. You won't be disappointed. I have expertise in below mentioned development: ✅PHP Development ✅Laravel Developer ✅CodeIgniter Developer ✅PHP Web Development ✅Custom PHP Development ✅MySQL Database Development ✅API Integration (PHP) ✅PHP E-commerce Development ✅PHP Backend Development ✅PHP Performance Optimization ✅PHP Security ✅PHP Troubleshooting ✅React js ✅Vue js Below are the list of technology stack I have worked with: ✅PHP ✅CodeIgniter 3/4 ✅Laravel ✅MySQL ✅HTML/CSS ✅JavaScript/jQuery ✅Bootstrap ✅RESTful APIs ✅JSON ✅Git ✅Apache or Nginx Why me?? ✅24/7 Available ✅Deliver work on time ✅ Fast Worker ✅100 % Accuracy Guaranteed
    vsuc_fltilesrefresh_TrophyIcon Core Java
    Laravel
    HTML5
    Online Research
    CSS 3
    Data Scraping
    React
    PHP
    JavaScript
    Lead Generation
    Email Marketing
  • $40 hourly
    Greetings, I am a seasoned full-stack developer with over 10 years of expertise in Java technologies, specializing in the end-to-end software development life cycle. My proficiency extends to agile methodologies, ensuring the successful implementation of web applications. Technical Proficiency: - Java: Extensive experience in J2SE, J2EE, JDBC, REST, Servlets, Swing, AWT, Java Beans, and Java Mail. - Frameworks: Proficient in Spring MVC, Spring Boot, Spring Integration, Spring Security, and Struts. - Database: Skilled in RDBMS (PostgreSQL, MySQL, Oracle, MSSQL) and NoSQL (ElasticSearch, Neo4J, MongoDB, Redis, Memcached). - AWS: Hands-on expertise in AWS services like Lambda, S3, CloudFront, EC2, Elastic Beanstalk, and RDS. - JavaScript: Proficient in TypeScript, JQuery, NodeJS, Angular JS, and Angular 10+. - Design: Skilled in Bootstrap 3, Custom CSS Design, Media Query, HTML5, JSP, and Thymeleaf. - Testing: Experienced in JUnit, Spring Test, Mockito, MockMVC, Integration Test, and Unit Test. - Chrome Extensions: Expertise in designing and developing Chrome extensions for enhanced browser functionality. Client's Feedback: ⭐⭐⭐⭐⭐ "Parth has good experience in both backend and frontend technologies. He is willing and capable of learning new skills, and implementing them in live projects. He has been vary available in just brainstorming possible solutions to unrelated tasks. Parth works with very minimal guidance, which really helps in saving a lot of customers time, in planning the requirements. Needless to say, he is a complete professional in project management, be it delivery or team communications. I would highly recommend him for your next project." ⭐⭐⭐⭐⭐ "Parth is a hard worker and always meets deadlines ahead of schedule. I'd highly recommend him to anyone looking for high quality web development work!" ⭐⭐⭐⭐⭐ "Very good experience, he solved some problems we can't solve by ourself in a very good and fast way! Good communication and perfect adherence to schedule" ⭐⭐⭐⭐⭐ "Parth has delivered the work within the time agreed. I appreciate very much about his availability, commitment to schedule, flexibility in dynamic situations and co-operation in the implementation. I would look forward to work with Parth again in the future and would recommend him very much for web site development." ⭐⭐⭐⭐⭐ "Parth is an extremely efficient and thorough programmer. He always delivers high quality code very quickly. I would recommend Parth to anyone needing backend development." ⭐⭐⭐⭐⭐ "Parth is sensational to work with, exceptionally knowledgeable, goes above and beyond for his customer. In addition provides sound direction and clean, working code. Highly recommend for full stack development. Very much looking forward to working with him again." I am passionate about delivering innovative solutions. I look forward to contributing to your success. Thank you for considering my profile. Best Regards, Parth
    vsuc_fltilesrefresh_TrophyIcon Core Java
    Web Service
    Data Scraping
    Spring Security
    MongoDB
    Amazon Web Services
    Java
    Web Development
    Microservice
    Google Chrome Extension
    Hibernate
    API Integration
    PostgreSQL
    Spring Framework
    Angular
    Browser Extension
  • $15 hourly
    Hello Dear Client, I am Jay Trivedi. I'm always looking forward to working with a client and solving the problem that they are facing. Feel free to contact me any kind of project which is related to my skill sets. About Me: • I have 3+ Years of experience. • I am Fast Learner. • I develop Websites, BOTs, Automation, Web Scrapers and much more... • I also deploy app on Docker, Kubernetes using cloud providers such as AWS, GCP, Azure, Linode, DigitalOcean and more... • I also design DataBases and Systems. • I completed 25+ Projects. • I provide Full Stack service. Why My Services? 1. I provide support for the service you bought even after the contract ends. (Based on the project and size) 2. Available for Long Term project. 3. Ready to provide Long-Term service. 4. Eager to provide solution for your startup and company. My Services: 1. Angular Websites 2. Backend Development in Django, Flask and FastAPI. 3. API Development 4. Browser Automation 5. Web Scrapers & Multithreaded web scrapers 6. API Integrations 7. Custom BOT 8. Zapier development 9. Power Automate 10. UiPath 11. Google’s API Integration 12. Telegram, Slack, Discord and WhatsApp BOTs. 13. Deployment of Any Website, BOTs, Scrapers etc.. My Skills: • Programming Languages Python, TypeScript • Frameworks Django, Flask, FastAPI, Angular • Front-end HTML, CSS, Bootstrap • Database MySQL, PostgreSQL, MonogoDB, SQLite, Redis • DevOps Docker, Jenkins, Kubernetes, AWS, GCP, DigitalOcean, Azure • Automation Selenium, UiPath, Automation Anywhere • Tools Git GitHub Postman Linux
    vsuc_fltilesrefresh_TrophyIcon Core Java
    Python Script
    Bot Development
    API
    Django
    Database
    Angular
    DevOps Engineering
    MongoDB
    MySQL
    Flask
    ETL Pipeline
    XML
    Scripting
    Selenium
    Automation
    Python
  • $20 hourly
    ☑️ 8+ years of experience ☑️ Proven Track Record of Accomplishment ☑️ 41 Project/Application Developed ☑️ B2B Verified Reviews ☑️ Available Full Time for Mobile Development ☑️ Flexible hours of discussion ☑️ Available on IM, in case, needed! 🌟 Clear communicator 🌟 Fast delivery 🌟 High-performance work 🌟 Satisfaction guaranteed 🌟 100% Job Success. 🏴 Skill Set 🏴 ⭐️ Front-End: Angular, React, Vue.js, Bootstrap, LESS, HTML/CSS ⭐️ Back-End: Python, Django, Laravel, ROR, Node.js ⭐️ Native programming: iOS8,9(Objective-C, Swift), Android (Java, Kotlin) ⭐️ MAC Plugins Development ⭐️ Chatting & Messaging: XMPP, Jabber, Socket, OpenTok Web RTC ⭐️ Payment Integration: Paypal, Credit Card, Braintree, klarna, Stripe ⭐️ Video, Photo, News sharing: Live-Stream, Multitask, Real-time upgrade, Red5, Wowza ⭐️ Video, Audio, Image processing: OpenGL, OpenCV CoreAudio, Bass ⭐️ Modern, flexible, clean and fresh UI animation effects ⭐️ Dynamic customize User Interface modules and APIs ⭐️ Communication: Excellent written & spoken English skills ▶️ Web service and Backend programming: AWS lambda, JSON, firebase, AWS, JSON, XML, REST, SOAP APIs ▶️ Databases: SQLite, Coredata, MySQL, SQL, MongoDB, Amazon RDS ▶️ Social SDK integration: Facebook, Twitter, Foursquare, Instagram, Tumblr, Google+, Pinterest 🔘 Sphere of experience 👉 Business Automation App | Swift, Kotlin 👉 Geo-Location App | Swift, Kotlin 👉 Health and Fitness App | Swift, Kotlin 👉 Video and Audio Stream App (Real TIme) | Swift, Kotlin 👉 Taxi Hiring App - Uber clones | Swift, Kotlin 👉 News, Event and Schedule App | Swift, Kotlin 👉 Booking and Service App | Swift, Kotlin 👉 Photo and Video Social Chat App | Swift, Kotlin 👉 Shopping App | Swift, Kotlin 👉 Real Estate App | Swift, Kotlin 👉 Calendar/QRcode scan App | Swift, Kotlin 🔘 What more I can offer 👉 Security Audits 👉 Project Architecture Consultancy iOS, Android 👉 SQLite database, Push notifications, Back-end Web services 👉 Maintenance and Updating service of existing mobile applications (iOS, Android) 👉 Free submitting on respective stores (Apple, Google) 👉 Quality Assured Deliveries 👉 Maintenance & Support for both iOS, Android 💾 Source code and project management: ▪️ Git, GitHub, BitBucket ▪️ JIRA, Slack, Redmine, Trello ▪️ TestFlight distribution, AppStore submission ❇️ If I work for you, I'll use all of my skills to do whatever you need ❇️ Drop a message 📨 Or Invite 🏆 for the task; will be happy to bring best to it through my skills 🤗
    vsuc_fltilesrefresh_TrophyIcon Core Java
    Laravel
    Android App Development
    Mobile UI Design
    iPhone UI Design
    Objective-C
    Swift
    Android Things
    Kotlin
    iOS Development
    Hybrid App Development
  • $60 hourly
    I am a software engineer with 17+ years of experience in designing and implementing large-scale enterprise software. - Expertise on Java, Spring, Angular and AWS - Can design a solution from start to finish, architecture, implementation and documentation included. - Understanding customer requirements is essential to me, so I am willing to communicate regularly. - Have a passion for clean code and engineering principles, a maintainable solution is a top priority for me.
    vsuc_fltilesrefresh_TrophyIcon Core Java
    Git
    CSS
    HTML
    MongoDB
    Oracle
    Web Application
    Angular
    Hibernate
    Spring Framework
    Spring Boot
    Solution Architecture
    Cloud Computing
    Amazon Web Services
    JavaScript
    Java
  • $38 hourly
    With over 6 years of experience in web & mobile applications (iOS/Android), project management (agile) and DevOps — I ensure seamless development processes. Languages: - Python, JavaScript I have successfully supported companies in surpassing their business goals, generating multimillion-dollar revenues, and engaging thousands of satisfied active users. My commitment goes beyond just writing code; I take full ownership of the projects I work on, guaranteeing results that speak volumes and stand the test of time. Are you in need of a dedicated and skilled developer who not only understands the technicalities but also the business implications of your project? Connect with me to transform your vision into exceptional, market-ready outcomes.
    vsuc_fltilesrefresh_TrophyIcon Core Java
    React Native
    WordPress
    Django
    Database Architecture
    React
    Google Analytics
    iOS
    Java
    PHP
    Python
  • $10 hourly
    I am a Full-stack developer with 8+ years of experience. My strong skills at website development and maintenance enable me to provide flexible, responsive and pixel perfect product in a short period of time. I perform maintenance to existing systems by monitoring and correcting bugs, do updates and add new features. My skills include but are not limited to: ➽ PHP, Laravel, CodeIgniter, WordPress ➽ JavaScript, jQuery, ES6 ➽ Vue.js, React Native, React.js, ➽ Databases: MySQL, MS SQL ➽ HTML5, CSS3, SCSS/Less, Bootstrap4 ➽ Version Control: Git, GitHub, BitBucket, SVN ➽ Linux, Ubuntu ➽ Experience with different API's ➽ Amazon Services EC2, S3 ➽ API Integration: Social Media, Payment Gateways
    vsuc_fltilesrefresh_TrophyIcon Core Java
    RESTful Architecture
    Laravel
    CodeIgniter
    PHP
    React
    jQuery
    HTML5
    CSS 3
    Vue.js
    CSS
  • $60 hourly
    With over 9 years of experience in mobile development, I'm your go-to expert for architecting top-notch solutions. From crafting robust architectures to delivering user-friendly mobile apps (iOS, Android, Cordova) and backend systems (NodeJS, PHP, Firebase), I ensure your ideas transform seamlessly into reality. Here's what I bring to the table: 📱 Native iOS and Android expertise with Swift, Objective-C, and Java. 🔧 Proficiency in frameworks like UIKit, Android SDK, and Cordova/Ionic. 🌐 Solid backend skills using NodeJS, Express, and databases like MongoDB and MySQL. 🛠️ Extensive experience with third-party services including Firebase, AWS, and Google APIs. 🚀 Specialized in integrations like social platforms, ad networks, and IoT technologies. ⏰ Committed to timely delivery with uncompromising quality and accuracy. Let's collaborate and turn your visions into exceptional digital experiences. Looking forward to creating greatness together!
    vsuc_fltilesrefresh_TrophyIcon Core Java
    Flutter
    iOS Development
    Game
    Android App Development
    Swift
    Django
    HealthKit
    Node.js
    Mobile App Development
    Java
    PHP
    Kotlin
    Python
    Android
    Smart Contract
  • $50 hourly
    I have been in the IT industry for more than 10 years and have supported/launched many successful business ideas from the planning stage to a complete professional-looking mobile or web application. My expertise in business analysis and management will guarantee that your project will receive the necessary attention to detail and stand out among the competitors. Your business goals are my top priority and I'll do everything in our power to achieve them. Picking the right technology and being agile in the development process will bring success to your product, be it a complex enterprise-grade solution or a slim MVP. I'm proficient in using the latest technologies which include but not limited to: Languages and frameworks: Java, C#, Objective C, Flutter, Swift, Cocoa Touch, PHP, Symfony, Laravel, Zend, Python, SQL, HTML, CSS, JavaScript, Angular.js, Node.js, Backbone.js, React, ReactNative, Ember.js, Require.js, Moment.js, jQuery, Bootstrap Data: MySQL, PostgreSQL, MongoDB, JSON, XML, RESTful IDE: Eclipse, Android Studio, Xcode, Zend Studio, Aptana, IntellijIdea API: Media API, Location and Map API, Web API Let's collaborate to bring your vision to life!
    vsuc_fltilesrefresh_TrophyIcon Core Java
    Angular
    Python
    Node.js
    Vue.js
    SaaS Development
    React
    SaaS
    MySQL
    Web Design
    CSS
    HTML5
    HTML
    Web Development
    PHP
    JavaScript
  • $15 hourly
    OBJECTIVE To work in a stimulating environment where I can apply and enhance my knowledge and skills to serve the organization to the best of my efforts.
    vsuc_fltilesrefresh_TrophyIcon Core Java
    Spring Boot
    Docker
    Git
    AWS Lambda
    Kubernetes
    Amazon S3
    Amazon Web Services
    Spring Security
    Java Persistence API
    API
    Amazon EC2
    Hibernate
    Java
    HTML
  • $20 hourly
    Over the last 15+ years, I have developed several Web Applications and mobile apps in android and iOS myself as well as managed teams to deliver clients in a satisfactory and timely manner. I am specialist in building applications from ground up. Most of my accomplished projects resulted in long-term association with my clients as I keep on adding values to the project from the concept phase to the final deployment to the stores and afterward. I look forward to building something beautiful and long-term with you. My skill sets in particular: 1. Web Application Development: Full Stack Development including both front end and backend a. Backend: PHP (Laravel, Codeigniter), Node.js, Express.js b. Frontend: Vue.js, Nuxt.js, Bootstrap, Tailwind CSS, Bulma CSS framework Especially proficient in rapid prototype development using some of the most prominent Vue based themes like Vuexy and Vuero. 2. Mobile Application Development: a. Hybrid / Cross platform apps: Flutter b. Native Apps: Objective C and Swift for iOS apps and Core Java and Kotlin for Android apps 3. Database: Scope understanding, Schema design, DB optimization a. MySQL b. Mongodb c. PostgreSQL d. AWS Aurora MySQL 4. API / WEB SERVICES Implementation 5. Server Setup and Deployment: Specialized in AWS environment a. Nginx b. Apache 6. Other Skills: - Scoping and Wireframing - Project Architecture Development and Project Management - Git for version control, AWS barebone server setup - Capability of solving complex logical problems in elegant manner - Extensive Experience in handling wellness apps besides social and service based hyper-local apps - Extensive Experience in custom CRM development, safety and health compliance based solutions, Do you have any questions? We can have a chat or call via Upwork messenger. Feel free to contact me!
    vsuc_fltilesrefresh_TrophyIcon Core Java
    Vue.js
    Android
    Core Bluetooth
    Flutter
    Objective-C
    Swift
    iOS
    PHP
  • $50 hourly
    I'm a Senior software engineer with 8+ years of extensive experience in building Mobile Apps and Web Apps. My experiences include working with modern technologies like Swift for iOS and Kotlin for Android, and Hybrid technologies like React Native and Flutter. I have been working with the MEAN/MERN stack as well. With more than 8 years of experience in development and customization of Mobile and Web applications, I have expertise in both Front end and Back end development. Being a Full Stack engineer, I can handle an application from the Start to Finish, including the designing. Areas of Expertise - E-commerce apps, Social Media Apps, On Demand Apps, Location-based Apps, BLE, and Business Apps. I am here to build long term relationship with my clients. Let's work together and create solutions that can change the world. Have an idea? Let's connect and get it started.
    vsuc_fltilesrefresh_TrophyIcon Core Java
    Mobile App Development
    React Native
    Firebase
    Angular
    Swift
    Flutter
    iOS Development
    Node.js
    ExpressJS
    Android App Development
    Kotlin
    MongoDB
  • $50 hourly
    I am a senior full-stack developer & designer with plenty of experience as a presales engineer, system architect, product manager, and project manager etc. I have been in this industry since a teen and have deep knowledge across the full-stack technology. Because of this, I am able to design and implement high quality solutions in a short period of time. I have many happy customers who come back to me with more job request. So I am proud to say that every project I have undertaken have been very successful. I have also earned the respect of my peers who have worked alongside me during big projects. Frontend: - HTML, CSS - JavaScript, TypeScript - PostCSS, SASS, Less, Bootstrap - Webpack - Gulp - Vue.js - React.js - jQuery Backend: - Python - Node.js - PHP - Go - Java - C# - Django - Express - Gin - Yii, Laravel Server: - Postgresql - MySQL, MariaDB - Redis - Nginx - Apache - Linux - AWS - Azure Devops: - Git - Ansible - Vagrant - Monitoring & alerting - Logging - Docker Design: - UI/UX design - Photoshop - Illustrator Misc Experience: - API Integration - Stripe, Twillio, GCP, Faceboo, Twitter Mailgun etc. - AEM (Adobe Experience Manager) - Project Management - Product Management - Wordpress - Data analytics - Natural language processing- - Test-driven development - iOS development - Android development - Graphics processing - Optimizing performance
    vsuc_fltilesrefresh_TrophyIcon Core Java
    ExpressJS
    DevOps
    Solidity
    Python
    Django
    HTML5
    Blockchain
    JavaScript
    Golang
    CSS
    web3.js
    Node.js
    React
    HTML
  • $15 hourly
    🏆 Boasting extensive experience as a FULL-STACK JAVASCRIPT web developer, I am a maestro in navigating complex frontend and backend programming, microservices, and database intricacies. My proficiency extends to Website/Web Application Development, Web Design, Maintenance, Enhancement, Troubleshooting, and an array of tasks. 🌟 I revel in embracing coding challenges and continuously expanding my repertoire with the assimilation of new technologies. ✳ I command a highly refined skill set, including: ✔ JavaScript, ReactJS, NextJS, AngularJS, VueJS, NuxtJS, Svelte, Typescript, State management techniques, NodeJS, ExpressJS, MERN STACK, MEAN STACK. ✔ HTML, CSS, SCSS, Bootstrap, TailwindCSS, Material UI, Mantine, Ant, etc. ✔ MySQL, MongoDB, DynamoDB, PostgreSQL, MariaDB, Microsoft SQL server. ✔ AJAX, REST API, SOAP, JSON, GraphQL. ✔ AWS, Digital Ocean, Google Cloud, Vercel, Netlify, Heroku, Kubernetes, Helm, etc. 🗨 Additionally, I am well-versed in integrating the ChatGPT-3 model. ✳ My professional journey spans across diverse sectors: 🔸 Marketplace, Retail, and grocery e-commerce 🔸 Fintech 🔸 Transport & Logistics 🔸 Real estate 🔸 Taxi-Booking, Event booking, and On-Demand Services 🔸 Health & Fitness 🔸 Social Networking 🔸 E-commerce, Shopping 🔸 Dating 🔸 Education 🔸 Sports ✳ A snapshot of my roles & responsibilities includes: ➕ Crafting front-end website architecture. ➕ Designing and developing the backend of Web applications. ➕ Pioneering user interactions on web pages. ➕ Establishing servers and databases for optimal functionality. ➕ Spearheading API development. ➕ Ensuring seamless responsiveness of applications. ➕ Proficiently debugging and optimizing code for peak performance. ➕ Meeting all technical and consumer requirements. ➕ Exhibiting excellent problem-solving skills and the ability to work independently or collaboratively within a team. 🤝🏻 Let's connect! I assure you a commitment to delivering 100% satisfaction. Thank you for investing your valuable time. Please engage with me in the Upwork message box for more in-depth discussions.
    vsuc_fltilesrefresh_TrophyIcon Core Java
    React Bootstrap
    React
    Node.js
    MySQL
    PHP
    Laravel
  • $48 hourly
    I am Sumon, a market researcher, sales enabler, data scientist, and web engineer from New York City. You will find me reliable, skilled, and experienced in web design and development, lead generation, business development, and market research/campaign management. I am a full-stack developer and have expertise in UX/UI. I have so far developed 22 iOS/Android apps and more than 82 custom websites. I have also provided 580,000 plus organic leads to my clients. I have successfully conducted 109 researches and campaigns to boost clients' sales/marketing numbers. I also manage marketing and drip campaigns for SMBs that are eager to enrich their customer bases globally. I am a strategic customer advocate who thinks deeply about how to improve customer experiences, have a passion for bringing your products into customers around the world, and enjoys working with diverse partners to execute complex projects. I find interest in tech products, and have crafted GTM strategy for seventeen applications and tech solutions in the US market in six years. I would love to take your project, and you can trust my quality/cost/time parameters. I value client needs and focus on client success. You can reach me 24/7 for real-time communication and clarifications. You will find clarity and visibility in the research & development processes as I will provide you daily updates. Feel free to connect. I can walk you through my process and share more portfolios.
    vsuc_fltilesrefresh_TrophyIcon Core Java
    QA Software & Testing Tools
    Technical Writing
    Software Testing
    Company Research
    CMS Development
    AngularJS
    iOS Development
    Core PHP
    Business Development
    Android App Development
    MEAN Stack Administration
    Market Research
  • $40 hourly
    **EXPERT VETTED BY UPWORK and among Top 1% talent on Upwork** I am a Full-Time Freelance IT consultant with more than 12 years of rich and varied experience in providing solutions to clients in various domains in the form of – • Full stack web application development • Enterprise applications development • Backend web services development • Desktop application development • Cloud infrastructure development I have extensive experience of developing applications in - Java, J2EE, Spring, JPA, Hibernate, Angular, Typescript and React Framework. BACKEND DEVELOPMENT - I have worked upon and developed backed of at least 100 different applications to date, which involves extensive experience working with Event Driven Architecture, Micro services architecture and Backend Web Services development. I also have strong hands-on experience and rely heavily upon TDD and BDD approach of Software development FRONT-END DEVELOPMENT - At the front-end, my expertise lies in working with – • JSP • JSF • Vaadin • JavaScript • HTML5 • CSS • Ajax • Bootstrap DESKTOP APPLICATION DEVELOPMENT - I have strong knowledge and experience of working with and developing Desktop applications using Java Swing and JavaFX. I have experience in developing applications for Mac, Windows as well as Linux. CLOUD INFRASTRUCTURE DEVELOPMENT - • 9x AWS Certified and "Microsoft Certified" Azure Solutions Architect Expert. • Extensive experience with using Docker, Kubernetes, Terraform. • Dockerisation and Orchestration, automating CI/CD Pipelines, VPN Setup, Monitoring and Logging, Cloud Cost Optimisation are my Forte. • Active user of AWS and Azure and excellent in picking cost-effective and secure solutions using these platforms. OTHER PROFICIENCIES - • Skilled in SQL as well as NoSQL programming. - Relational Databases - Postgres, MySQL, SQL Server, Oracle and DB2. - Non-Relational databases - MongoDB, DynamoDB • Skilled with ElasticSearch and Redis SOFT SKILLS – • Individualistic personality – who likes to find solutions. • Strong work ethic - my past work can vouch for this. • Positive attitude- comes in handy, while solving complex problems. • Excellent command over English language. • Excellent Communication skills. • Believes in Team work and joint efforts - can mingle into your current team easily. • Leadership skills - can lead and take up responsibility, even in difficult situations. • Highly dedicated personality - I don’t get bogged down by hiccups, and work to sail my way through them. As I am working in a highly dynamic field, so I keep updating myself with latest trends and developments in the field of software development, thus ensuring HIGH VALUE WORK for my clients. My technical capabilities, hardworking nature and past record of providing value to my clients can be vouched by client reviews on my profile. Thanks & Cheers!
    vsuc_fltilesrefresh_TrophyIcon Core Java
    Cloud Computing
    DevOps
    Microsoft Azure
    Amazon Web Services
    CI/CD
    RabbitMQ
    SQL Programming
    Hibernate
    Microservice
    RESTful API
    Spring Security
    Spring Boot
    Spring Framework
    J2EE
    Java
  • $35 hourly
    Java developer for 19 years. I have developed a web applications using Java, JSP, Servlets, DHTML, Java EE, JDBC and standalone Java applications. My competency lies in development of full end-end products. I'm seekin opportinities for build java based web applications, standalone Java applications or Eclipse plugins. Also have experience in the following areas: GWT, Swing, AWT, SQL, OOP, JUnit, OSGi, Maven, Ant, Git, SVN, CVS, Floreant POS, Marketcetera, Quickfix/J, Play 1.x, Docker and software design and testing.
    vsuc_fltilesrefresh_TrophyIcon Core Java
    JavaFX
    HTML
    Spring Framework
    Java Persistence API
    KNIME
    J2EE
    Hibernate
    Jakarta Server Pages
    OSGi
    Java
    Eclipse IDE
    JavaScript
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At A Glance: Core Java

Developing and programming software is the backbone of many modern businesses and industries. Programs and applications can be created to fill many different roles, including games, e-commerce, and interactive web content. These applications can be used internally for tracking and managing other digital resources, or developed as standalone software to distribute to customers and consumers. One important feature of any program is that it is written and developed in a programming language that allows it to be easily ported and executed on other computer systems. Core Java, commonly known as Java Standard Edition (SE), is one such programming language that gives you the portability and flexibility in your developed software that you need for your business and project. Taking advantage of an experienced Java developer or programmer is the most effective way to leverage this powerful language.

Java developers and programmers available on Upwork generally possess a deep knowledge and skill set. Backgrounds include building, writing, and developing programs from the ground up for a wide variety of uses. Java developers and programmers also have experience working with existing applications by adding additional functions or features. Core Java developers and programmers are highly computer-literate professionals with advanced mathematical skills and frequent experience working with other computer programming languages and development frameworks. The portable nature of applications written in Core Java lead to programmers’ and developers’ comfort with many different systems, which fills dynamic roles within a business or project.

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