Hire the Best J2EE Developers
in the United States

More than 3,000 reviews on G2
Rating is 4.5 out of 5.
4.5/5
of Upwork by G2 peer reviewers
Maeis G.

Los Angeles, California

$50/hr
5.0
24 jobs

I have +10 years of experience developing Web-based applications on the J2EE, Groovy/Grails stack. I have used the cutting-edge technologies and frameworks to build robust, secure, scalable and Test-driven applications: OS: Linux, Windows Languages: Java, Groovy, HTML, JavaScript,... Frameworks: Grails, Spring, Hibernate, JSF, Struts, AWS, Spock, Selenium,... Databases: MySQL, PostqreSQL, MongoDB, Oracle, SQL Server I have leaded and participated in the teams across continents in an Agile based approach (Scrum) and have excellent communication skills in English and French.

  • J2EE
  • Grails
  • Java
  • PostgreSQL
  • MySQL
  • MongoDB
  • Apache Groovy
  • RESTful Architecture
  • Android App Development
  • Linux System Administration
Ariel O.

Creve Coeur, Missouri

$75/hr
5.0
1 jobs

✅ I perfectly realize my clients' visions. 🔝 As a talent equipped with top-tier skills and 🎩outstanding business acumen, I turn clients' visions into success. Poised to become a Software Engineer/Applications Developer in the company specializing in JAVA/J2EE(Full Stack or Backend). A Highly Talented Professional with over 14 years of experiences(12 years in Java/J2EE and 2 years in .NET). A Senior Software Engineer with some Lead Experiences in the domain of Finance, Telecommunications, State Jobs, etc. Summary of Qualifications: • HTML, HTML 5, CSS, CSS 3, JavaScript, jQuery, Ajax, XML, XSLT, Json, Dojo, Angular, Bootstrap, • React/React JS. • 14 years of solid experiences in Web Applications Technologies • 12 years of solid experiences in Core Java • 12 years of solid experiences in Java EE Technologies (STRUTS, SPRING, HIBERNATE, JSF, EJB, JPA, • EAD 4J/Jade) and spring boot Microservices • Experience in Shell Scripting and Perl Programming • Experience in JavaScript Frameworks like Angular/Angular JS, React/ReactJs and jQuery • Experience in Jenkins, Splunk • Experience in Windows, Linux, Unix and MacOS Operating Systems • Experience in Linux and Shell Scripting • Software Design and Architecting Skills • Experience JMS queue/topic, RabbitMQ and Kafka. • Strong experience of Analysis and Design of Databases (Entity Relationship Diagram) • Strong experience of Object-Oriented Analysis and Design (UML) • Strong experience in Agile Process Model • Repositories like TFS, RTC, git, unfuddle, SVN, bitbucket • Excellent verbal and written communication skills, with the ability to articulate complex ideas clearly and concisely to both technical and non-technical stakeholders. • Strong analytical and problem-solving abilities, with a focus on improving processes to accelerate delivery, foster innovation, reduce costs, and improve quality. • Japan Information Technology Standard Examination Certified Technical Skills: • View Technologies: Face lets, jsp, Angular(Typescript), React/ReactJs(JSX, Typescript), HTML, CSS, • Javascript, Bootstrap, etc • Object Relational Mapping (ORM): JPA and Hibernate • Programming Languages: Java, C#, Typescript, Groovy • Operating Systems: Linux, Windows, Unix, MacOS • Web Service: REST, SOAP, RESTful Microservices • Cloud Platforms: AWS, Windows Azure, PCF, GCP • Monitoring Tools: Dynatrace, Datadog, splunk, etc • Security: Spring Security, Certificates, SSL, LDAP • Batch Jobs: Spring Batch, Multithreading • Unit Testing Frameworks: Junit, Testng, PowerMock, Groovy Spock, Mockito, Jest, Vitest, etc • Application Servers: Glassfish, WebSphere and Tomcat • Integrated Development Environment (IDE): NetBeans, STS, RAD, RSA, intellij • Database Management Systems: MS SQL Server, DB2, Oracle, Mongo DB, Postgre SQL • CI/CD: jenkins, maven, gradle • Others: insomia, postman, jmeter, Docker, Kubernetes, swagger, RabbitMQ, Kafka, etc.

  • Web Application
  • Artificial Intelligence
  • Construction Document Preparation
  • Product Development
  • Specifications
  • Mobile App
  • Angular
  • Java
  • AI Development
  • FinTech
  • Flutter
  • MERN Stack
  • Python
  • Node.js
  • .NET Framework
  • C#
  • Finance & Accounting
  • Ruby on Rails
  • React
  • Spring Boot
Prashant G.

Columbus, Ohio

$46/hr
4.8
234 jobs

Over 20 years of experience in planning, developing and implementing various information technology and CRM solutions across Institutions.  Salesforce Certified Administrator. •Over 5 years of implementing customized CRM solutions to various clients like Verizon, Allianz Re-Insurance . •Automated Service, Sales and marketing processes using Salesforce Lightning flows, AI Agentforce and APEX/Visualforce • Implemented core Salesforce modules like Sales, Service, Financial, Health cloud for small businesses using Agile/Scrum methodologies • Integrated Salesforce with apps like Zoom, RingCentral, Box, Gmail using Zapier • Utilized Webservices/REST API to integrate Salesforce with third party applications. • Implemented Web to Lead, Web to Case and Email to Case channels. • Created OMNI Channel and Web Chat for customer service. • Built reports and dashboards to measure kpis. • Imported data into Salesforce using tools like DataLoader and workbench. • Implemented and created the full life cycle process for large-scale software development • Identified architectural improvements resulting in increased product reliability and responsiveness to new feature requests • Utilizing strong functional knowledge to drive product design • MS (Computer Science) , University of South Carolina, Columbia  Salesforce Certified Administrator  Sun Certified Programmer for Java 2 Platform  Sun Certified Web Component Developer for Java 2 Platform  Sun Certified Business Component Developer for Java 2 Platform  Project management for IT Profession TECHNICAL SKILLS • Java, J2EE, Java Servlets, JSP, JNDI, JFCs, EJB’s, Java Script, AJAX, Web services • Spring Webflow 2.5, STRUTS, Google Web Tool Kit, XML, XSL, ASP, .NET, Shell Scripts, JUnit • WebSphere 8.5, Tomcat, Web Logic 6.0, IIS, Silver Stream App Server, JRun, JWS • RAD 7.5, Eclipse, Visual Studio, JDeveloper, CVS, Clear Case, Stash, UML, Rational Rose • Oracle 11g, D2000, IBM DB2, MYSQL, MS SQL SERVER, MS ACCESS, Toad • Windows XP, IBM AIX and Unix (SUN SOLARIS 5.7), Silver Stream e-portal 2.2 • JIRA, Confluence, Cloud Services (PaaS), SalesForce Administration, APEX, Visualforce, LWC, AI Agentforce

  • J2EE
  • Jakarta Server Pages
  • Core Java
  • Salesforce Lightning
  • XML
  • XSL
  • Spring Framework
  • Apache Struts
  • IBM Db2
Muhammad M.

East Brunswick, New Jersey

$60/hr
5.0
19 jobs

🏆 𝗘𝘅-𝗚𝗼𝗼𝗴𝗹𝗲 & 𝗔𝗺𝗮𝘇𝗼𝗻 (𝗔𝗪𝗦) 𝗖𝗹𝗼𝘂𝗱 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 | 𝟮𝟬+ 𝗬𝗲𝗮𝗿𝘀 𝗼𝗳 𝗘𝘅𝗽. 🤝 𝗙𝗿𝗲𝗲 𝟯𝟬–𝟲𝟬 𝗺𝗶𝗻𝘂𝘁𝗲 𝗰𝗼𝗻𝘀𝘂𝗹𝘁𝗮𝘁𝗶𝗼𝗻 before starting the project 𝗨𝗦-𝗯𝗮𝘀𝗲𝗱 𝗦𝗲𝗻𝗶𝗼𝗿 𝗔𝗪𝗦 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁, 𝗔𝗪𝗦 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 & 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗲𝗱 𝗚𝗼𝗼𝗴𝗹𝗲 𝗖𝗹𝗼𝘂𝗱 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁 𝗧𝗿𝘂𝘀𝘁𝗲𝗱 𝗯𝘆 𝗘-𝗰𝗼𝗺𝗺𝗲𝗿𝗰𝗲, 𝗙𝗶𝗻𝘁𝗲𝗰𝗵, 𝗛𝗲𝗮𝗹𝘁𝗵𝗰𝗮𝗿𝗲 & 𝗜𝗻𝘀𝘂𝗿𝗮𝗻𝗰𝗲 𝗰𝗹𝗶𝗲𝗻𝘁𝘀 𝘄𝗼𝗿𝗹𝗱𝘄𝗶𝗱𝗲 𝗖𝗼𝗹𝗹𝗮𝗯𝗼𝗿𝗮𝘁𝗲𝗱 𝘄𝗶𝘁𝗵 𝗰𝗹𝗶𝗲𝗻𝘁𝘀 𝗮𝗻𝗱 𝘁𝗲𝗮𝗺𝘀 𝗮𝗰𝗿𝗼𝘀𝘀 𝘁𝗵𝗲 𝗨𝗦, 𝗨𝗞, 𝗘𝘂𝗿𝗼𝗽𝗲, 𝗮𝗻𝗱 𝗨𝗔𝗘 If your cloud bill keeps climbing every month for no clear reason, your deployments feel slow and risky, or server downtime keeps costing you customers and revenue, I know exactly how frustrating that is. Most businesses run into these problems because their cloud infrastructure was never properly architected from the start, their CI/CD pipelines are outdated, or security and monitoring simply weren't set up right. This is exactly what I fix every day. Whether it's a messy AWS Architecture that's bleeding money, a GCP DevOps pipeline that's holding your team back, or legacy systems that desperately need to move to the cloud. I don't just write code, I dig into the real problem behind your infrastructure and deliver a solution that cuts costs, boosts performance, and lets you finally stop worrying about 3 AM outage calls. 𝗔𝗹𝗿𝗶𝗴𝗵𝘁, 𝗾𝘂𝗶𝗰𝗸 𝗶𝗻𝘁𝗿𝗼 𝗯𝗲𝗳𝗼𝗿𝗲 𝘄𝗲 𝗱𝗶𝘃𝗲 𝗶𝗻, 𝗵𝗲𝗿𝗲'𝘀 𝗮 𝗹𝗶𝘁𝘁𝗹𝗲 𝗮𝗯𝗼𝘂𝘁 𝗺𝗲. 😊 With 20+ years of hands-on experience, I work as an AWS Developer, AWS DevOps expert, and GCP DevOps engineer, helping businesses move to the cloud faster, cheaper, and safer. I've had the privilege of working directly with teams at Google and Amazon Web Services, which means I don't just know best practices, I helped write them. As a GCP Engineer and Google Cloud Architect, I specialize in building cloud systems that just work, no downtime, no headaches, no wasted budget. Whether you need a GCP Developer to build from scratch, or someone skilled in devops google cloud automation to fix what's broken 🏆 𝗣𝗥𝗢𝗙𝗘𝗦𝗦𝗜𝗢𝗡𝗔𝗟 𝗖𝗘𝗥𝗧𝗜𝗙𝗜𝗖𝗔𝗧𝗜𝗢𝗡𝗦:- 🥇 AWS Certified Solutions Architect – Professional 🥇 AWS Certified DevOps Engineer – Professional 🥇 AWS Certified SysOps Administrator – Associate 🥇 AWS Certified Developer – Associate 🥇 GCP Cloud Architect 🥇 GCP Cloud DevOps Engineer 🥇 IBM Certified XML Developer 🥇 IBM Enterprise Connectivity with J2EE 🥇 Sun Certified Java Programmer 🥇 Sun Certified Java Web Components Developer 💥 𝗦𝗼𝗺𝗲 𝗼𝗳 𝗺𝘆 𝗿𝗲𝗰𝗲𝗻𝘁 𝗵𝗶𝗴𝗵-𝗶𝗺𝗽𝗮𝗰𝘁 𝗽𝗿𝗼𝗷𝗲𝗰𝘁𝘀 𝘁𝗵𝗮𝘁 𝘀𝗽𝗲𝗮𝗸 𝗳𝗼𝗿 𝘁𝗵𝗲𝗺𝘀𝗲𝗹𝘃𝗲𝘀:- ➝ Insurance (AWS Developer): Designed a disaster recovery solution with 99.99% uptime. ➝ Media Company (AWS DevOps): Improved CI/CD pipeline, reducing deployment time by 90%. ➝ Healthcare (GCP DevOps): Automated deployment as a Google Cloud Engineer, cutting downtime by 40%. ➝ E-Commerce (AWS Architect): Migrated 50+ apps, reducing costs by 30% and improving performance by 25%. ➝ Financial Services (GCP Architect): Migrated data warehouse to Google Cloud Platform, cutting processing time by 40%. ➝ Retail (GCP Developer): Developed a recommendation engine using devops google cloud practices, increasing engagement by 20%. 𝗟𝗲𝘁’𝘀 𝘀𝗰𝗵𝗲𝗱𝘂𝗹𝗲 𝗮 𝗳𝗿𝗲𝗲 𝟯𝟬-𝗺𝗶𝗻𝘂𝘁𝗲 𝗰𝗼𝗻𝘀𝘂𝗹𝘁𝗮𝘁𝗶𝗼𝗻 𝘄𝗵𝗲𝗿𝗲 𝗜 𝗰𝗮𝗻 𝘄𝗮𝗹𝗸 𝘆𝗼𝘂 𝘁𝗵𝗿𝗼𝘂𝗴𝗵 𝗲𝘃𝗲𝗿𝘆𝘁𝗵𝗶𝗻𝗴 𝘀𝘁𝗲𝗽 𝗯𝘆 𝘀𝘁𝗲𝗽. Best, 𝐌𝐮𝐡𝐚𝐦𝐦𝐚𝐝 𝐌𝐚𝐧𝐬𝐨𝐨𝐫

  • Amazon Web Services
  • Node.js
  • Cloud Engineering
  • MongoDB
  • AWS Development
  • Google Cloud Platform
  • Amazon S3
  • AWS Lambda
  • Back-End Development
  • MERN Stack
  • Full-Stack Development
  • JavaScript
  • AWS Amplify
  • CI/CD
  • BigQuery
  • Firestorm
  • AWS Application
  • React
  • Next.js
  • NestJS
Mike B.

Lee's Summit, Missouri

$40/hr
4.6
220 jobs

Expert Full Stack developer having skills in AI, Android, iOS & Web Development. I have 12 Years of experience in Mobile Application Development (Flutter/React Native), .Net, MERN Website Development and AI Driven softwares. 5 star rating from last 23 completed projects. My specialization is in building social networks, streaming apps, tools, utilities, e-commerce apps, consumer-facing products and B2B solutions. Integrated AI tools like Claude, OpenAI Codex, and GPT-based systems to accelerate code generation, documentation, and intelligent feature development (e.g., chatbots, sentiment analysis, recommendation systems). Designed and deployed AI-driven modules for predictive analytics, personalized content delivery, and automated decision-making in e-commerce and social apps. Developed voice and text-based assistants leveraging LLMs, Dialogflow, and OpenAI APIs, enhancing user engagement and customer support experiences. Leveraged machine learning pipelines for data-driven applications in domains such as healthcare, agriculture, and ad-tech—enabling smarter dashboards and business insights. - Website Skills: React, Angular, PHP, Wordpress, CakePHP, Magento, .Net, MySQL, CodeIgnitor etc. - Android/iOS: SWIFT, Java, J2EE, Objective C , C# , C++, C. - Hybrid framework: React Native, Flutter, Angular, NodeJS - Web service: XML/JSON, REST/SOAP - Cloud backend: Amazon S3 EC2 AWS, Firebase, Parse, Twillio - Online Payment Gateway: Paypal, Authorize.net, Stripe, PayUMoney, Braintree, Juspay - Tools: Visual Studio Code, X-Code, Android Studio, Netbeans, GitHub, Gitlab, Twilio I have done mobile applications ranging from Tiles manufacturing company, Hospitals, Pharmaceutical company to Entertainment applications like Kids ABCD and maths game. I have developed many web applications for ecommerce, agricultural warehouse management, Advertisement Network etc. With a growing focus on AI-powered automation, I combine software engineering expertise with next-gen AI capabilities to build digital products that are not only functional but also intelligent and future-ready.

  • Android
  • C#
  • React Native
  • Angular
  • TypeScript
  • React
  • Node.js
  • Microsoft SQL Server
  • Xamarin
  • iOS Development
  • Flutter
  • ASP.NET MVC
  • .NET Core
  • Redux
  • ServiceNow
Carprece R.

Sugar Land, Texas

$75/hr
5.0
18 jobs

Helping Startups & Enterprises Build Reliable, AI-Enabled Systems I help companies overcome unstable systems, integration bottlenecks, and production bottlenecks - turning fragile codebases into scalable, reliable, and production-ready platforms. With 15+ years of experience in backend architecture, mobile apps, AI integration, and cloud deployment (AWS, Azure, GCP), I specialize in solving complex technical challenges that slow down growth or increase operational risk. My expertise includes: • AI & ML Integration: Structured prompt design, LLM evaluation loops, JSON outputs, and automation workflows • Backend Architecture & Microservices: Scalable, maintainable systems for web and mobile applications • Payments & Cloud Systems: Stripe integration, secure cloud deployment, CI/CD pipelines Recent results: • Reduced AI output variance and improved reliability across thousands of records for an enterprise client • Delivered microservices for a federal healthcare platform, improving notification delivery speed and system stability • Built production-ready payment and e-commerce systems, cutting manual processing by 80% If you need to stabilize a system, integrate AI into your workflow, or build a high-quality backend platform, I can help you do it efficiently and reliably. AI & Automation: Prompt Engineering, LLMs (GPT-4/5), NLP, Structured Output, Evaluation Loops, LangChain Backend & Web: Java, Python, Spring Boot, FastAPI, REST APIs, Microservices Mobile: iOS Apps (Swift) Databases: MySQL, PostgreSQL, Oracle Cloud & DevOps: AWS, Azure, GCP, CI/CD (GitHub Actions) Payments & APIs: Stripe, OAuth, Postman, Swagger Featured Projects: AI Evaluation Loop Platform Designed structured prompts and evaluation workflows for LLMs, improving model consistency and reliability across thousands of records. Impact: Reduced output variance and improved accuracy. Government Healthcare Microservice Platform Developed backend microservices for federal healthcare notifications. Impact: Improved delivery speed, reliability, and employee communication. Startup Fitness App (iOS) Built a mobile app capturing user data and integrated AWS cloud storage. Impact: Enhanced user experience and retention through seamless cloud integration. Baked Goods E-Commerce Platform Developed backend microservices with Stripe payments and admin dashboards. Impact: Reduced manual order processing by 80%, improving operational efficiency. Why Hire Me: Strategic Problem-Solver: I don’t just code — I solve technical challenges aligned with your business goals. Senior Expertise: 15+ years building scalable, production-ready systems. AI + Engineering: Integrating AI into workflows for consistent, reliable results. Reliable Communication: Clear, proactive updates and milestone tracking. Call-to-Action: Let’s discuss your project and explore how I can help you scale your system, integrate AI, or stabilize complex applications. High-impact, production-ready solutions start here.

  • Python
  • Azure Cosmos DB
  • MySQL
  • Spring Boot
  • Web Service
  • iOS Development
  • Hibernate
  • Mobile App Development
  • Firebase
  • API Development
  • Google Cloud Platform
  • HTML5
  • CSS
  • RESTful API
  • Swift

How it works

Post a job for freePost a job

Tell us what you need. Create your own job post or generate one with AI then filter talent matches.

Hire top talent fast

Consult, interview, and hire quickly, so you can meet the freelancers you're excited about.

Collaborate easily

Use Upwork to chat or video call, share files, and track project progress right from the app.

Payment simplified

Manage payments in one place with flexible billing options. Only pay for approved work, hourly or by milestone.

Don't just take our word for it

How do I hire a J2EE Developer in the United States on Upwork?

You can hire a J2EE Developer in the United States on Upwork in four simple steps:

  • Create a job post tailored to your J2EE Developer project scope. We'll walk you through the process step by step.
  • Browse top J2EE Developer talent on Upwork and invite them to your project.
  • Once the proposals start flowing in, create a shortlist of top J2EE Developer profiles and interview.
  • Hire the right J2EE Developer for your project from Upwork, the world's largest work marketplace.

At Upwork, we believe talent staffing should be easy.

How much does it cost to hire a J2EE Developer?

Rates charged by J2EE Developers on Upwork can vary with a number of factors including experience, location, and market conditions. See hourly rates for in-demand skills on Upwork.

Why hire a J2EE Developer in the United States on Upwork?

As the world's work marketplace, we connect highly-skilled freelance J2EE Developers and businesses and help them build trusted, long-term relationships so they can achieve more together. Let us help you build the dream J2EE Developer team you need to succeed.

Can I hire a J2EE Developer in the United States within 24 hours on Upwork?

Depending on availability and the quality of your job post, it's entirely possible to sign up for Upwork and receive J2EE Developer proposals within 24 hours of posting a job description.