J2EE Developers For Hire
Showing 36 results
Sponsored Freelancers
-
Hire liveinulancing
Senior Full-Stack Engineer | Java, Spring Boot, Angular, Cloud (GCP/AWS) | WebRTC | 8+ Years Experience I am a Senior Full-Stack Developer with over 8 years of experience designing and delivering production-grade software for enterprise and startup environments. I specialize in building scalable, secure, and...Senior Full-Stack Engineer | Java, Spring Boot, Angular, Cloud (GCP/AWS) | WebRTC | 8+ Years Experience I am a Senior Full-Stack Developer with over 8 years of experience designing and delivering production-grade software for enterprise and startup environments. I specialize in building scalable, secure, and high-performance systems using Java (8–17), Spring Boot microservices, Angular, REST APIs, Cloud platforms (GCP/AWS)—and real-time communication systems using WebRTC. My background spans fintech, healthcare, telecom, e-commerce, and government projects, where I’ve handled everything from greenfield architecture to refactoring legacy systems and scaling platforms used by thousands of users. Real-Time & Event-Driven Systems In addition to traditional enterprise systems, I work with WebRTC-based real-time solutions: WebRTC: One-to-one and group video/audio calling, screen sharing, low-latency streaming, signaling servers, secure real-time architectures Kafka: High-throughput event pipelines, asynchronous microservice communication, stream processing, audit/event sourcing patterns, and fault-tolerant data flows - One-to-one and group video/audio calling - Screen sharing and low-latency streaming -Signaling servers and backend integration -Secure, scalable real-time architectures -WebRTC integrated with modern web apps and cloud backends -This makes me well-suited for products involving: -Video conferencing -Live collaboration tools -Telehealth platforms -EdTech / remote learning -Real-time dashboards and streaming workflows What I deliver: -Clean, maintainable, production-ready code -Scalable microservice architectures -Secure applications (JWT, OAuth2, role-based access) -Cloud-native solutions on GCP & AWS -Real-time systems using WebRTC -End-to-end development: backend → frontend → deployment -Clear communication and predictable delivery -Core Skills -Backend: Java, Spring Boot, Spring Security, Microservices, REST APIs -Frontend: Angular (2–12), HTML, CSS, TypeScript -Real-Time: WebRTC, signaling design, low-latency systems -Cloud & DevOps: GCP, AWS, Docker, Jenkins, CI/CD -Data: MySQL, PostgreSQL, Oracle, BigQuery, Kafka -Architecture: System design, performance optimization, API design I work with an ownership mindset—treating your product as if it were my own. Whether you need a real-time communication feature, a cloud-native backend, or a full-stack platform built from scratch, I focus on long-term quality and business impact, not just “getting it done.” If you are looking for a reliable senior engineer who can think in systems, communicate clearly, and deliver production-grade results, I’m ready to help you build. less -
Hire devetar
Software and Hardware Engineer with 14 years of experience delivering reliable technical solutions across multiple industries, including hospitality, environmental monitoring, gaming, fintech, and healthcare, with a strong background in embedded systems, electronic hardware design, firmware development, system-level...Software and Hardware Engineer with 14 years of experience delivering reliable technical solutions across multiple industries, including hospitality, environmental monitoring, gaming, fintech, and healthcare, with a strong background in embedded systems, electronic hardware design, firmware development, system-level engineering, and modern software development. less -
Hire winmaclin
⭐ Top 2% on Freelancer.com | Narola Infotech - Digitalising Businesses Since 2005 ✎ About Us We are Narola Infotech, a globally recognized IT solutions company with 20+ years of experience delivering high-performance web, mobile, and enterprise software solutions to 1500+ happy clients across 50+ countries. Trusted...⭐ Top 2% on Freelancer.com | Narola Infotech - Digitalising Businesses Since 2005 ✎ About Us We are Narola Infotech, a globally recognized IT solutions company with 20+ years of experience delivering high-performance web, mobile, and enterprise software solutions to 1500+ happy clients across 50+ countries. Trusted by Fortune companies like CGI, L&T, Infosys, Biocon, and TVSNext. We don't just build software, we build lasting partnerships. Our approach is simple: understand your vision, deliver beyond expectations, and stay with you every step of the way. ✎ Why Choose Us? ➬ 20+ Years of Industry Experience ➬ 350+ Talented IT Professionals ➬ 3000+ Successfully Delivered Projects ➬ 95% Client Retention Ratio ➬ 4.9 ⭐ Clutch Rating ➬ 100% Project Success Ratio ➬ Clutch Top 1000 Companies Global 2022 ➬ Best Outsourcing Company - SGCCI ✎ Our Services ➬ Custom Web & Mobile App Development ➬ Custom Enterprise Software Development ➬ AI/ML & Data Analytics Solutions ➬ QA & Software Testing (Automation, Security, Performance) ➬ DevOps, Cloud Migration & Managed Services ➬ Salesforce Consulting, Implementation & Support ➬ Staff Augmentation - Dedicated Teams or Individual Developers ➬ Support & Maintenance ✎ Tech Stack ➬ Frontend: ReactJS, AngularJS, VueJS, NextJS, NuxtJS ➬ Backend: Node.js, Java, PHP, Laravel, .NET, Python, Django, WordPress ➬ Mobile: Flutter, React Native, iOS (Swift), Android (Java/Kotlin) ➬ Cloud & DevOps: AWS, Azure, Docker, Kubernetes, Jenkins, CI/CD, Terraform ➬ Database: MySQL, MongoDB, PostgreSQL, Firebase, MS-SQL ➬ Other: Salesforce, MS Dynamics 365, Power Platform, Big Data, AI/ML, Automation ✎ Industries We Serve ● Fintech ● Healthcare ● Retail & Ecommerce ● Education ● Real Estate ● Media & Entertainment ●Transport & Logistics ✎ Our Strengths ➬ Agile Development Methodology ➬ Daily & Weekly Progress Reports ➬ Clear Communication & Collaboration ➬ 100% Plagiarism-Free & Secure Delivery ➬ Guaranteed Data Privacy & NDA Protection ➬ Flexible Engagement Models: ● Fixed Cost ● Time & Material (Hourly) ● Dedicated Team ● Hybrid Model (Fixed + Hourly) ✎ Our Promise "You will get the value of every penny you spend. We are committed to driving your business forward with reliable, quality solutions powered by technology and innovation." - Ashish Narola, CEO less -
Hire jitendrasatpuda
Quality Work + Fast Speed = Excellent Result + Business Success, this is my working style. In this site, if you want to implement your idea, then I am always ready for you. Skillset: - iOS and Android (Native, Cross Platform and Hybrid) - Web: Web development, Core PHP, WordPress, HTML 5, CodeIgniter, Bootstrap,...Quality Work + Fast Speed = Excellent Result + Business Success, this is my working style. In this site, if you want to implement your idea, then I am always ready for you. Skillset: - iOS and Android (Native, Cross Platform and Hybrid) - Web: Web development, Core PHP, WordPress, HTML 5, CodeIgniter, Bootstrap, Laravel, CSS, JS, Angular, Ajax - Database: MySQL, Firebase DB MASTERED SOFTWARE: - Android Studio - Eclipse - Visual Studio MASTERED SERVICES: - UI/UX - App Dev - App/Website UI - Brand Building - Graphic Designing SERVICES - Free support - Every time available - Flexible with any time zone as per project requirement less -
Hire KarthikTechCon
Enterprise AI Solution Architect | Founder & CEO – Resonite Technologies With over 18 years of experience in enterprise software engineering and solution architecture, I help organizations transform business ideas into scalable, production-ready digital platforms. I specialize in designing and delivering AI-powered...Enterprise AI Solution Architect | Founder & CEO – Resonite Technologies With over 18 years of experience in enterprise software engineering and solution architecture, I help organizations transform business ideas into scalable, production-ready digital platforms. I specialize in designing and delivering AI-powered enterprise applications, SaaS platforms, cloud-native architectures, and intelligent automation solutions. My expertise spans the complete software lifecycle—from solution architecture and technology selection to development, deployment, and production support. Over the years, I have successfully delivered solutions across Healthcare, Logistics, Banking, FinTech, Retail, Manufacturing, and Enterprise Operations for clients in Australia, Singapore, the Middle East, Europe, and North America. My Core Expertise ✔ Enterprise Solution Architecture ✔ AI & Generative AI Applications ✔ RAG (Retrieval Augmented Generation) ✔ AI Agents & Workflow Automation ✔ SaaS Platform Development ✔ Enterprise Web Applications ✔ Cloud Architecture (AWS / Azure / GCP) ✔ Python | FastAPI | Django ✔ React | Vue.js | Angular ✔ Node.js | .NET | Java ✔ PostgreSQL | SQL Server | MongoDB ✔ REST APIs & Microservices ✔ DevOps & CI/CD Enterprise Solutions Delivered • AI-powered Warehouse Management System (WMS) • AI-enabled Transport Management System (TMS) • Multi-tenant Hospital Management SaaS Platform • Banking & Investment Management Platform • Money Transfer Platform • CRM & ERP Solutions • AI Chatbots & Enterprise Knowledge Assistants • OCR & Document Intelligence Solutions • Enterprise Reporting & Analytics Platforms Why Clients Hire Me ✔ 18+ Years Enterprise Experience ✔ End-to-End Solution Ownership ✔ Clean, Scalable Architecture ✔ Production-Ready Code ✔ Strong Communication ✔ Long-Term Technical Partner Whether you need an AI-powered platform, enterprise application, cloud migration, system integration, or solution architecture, I can help transform your requirements into reliable, scalable software. less -
Hire islam3200
Hi, I'm Eng Touhidul Islam. I'm a Top Rated Full Stack Developer with 10+ years of experience helping startups, businesses, and agencies build modern, secure, scalable, and high-performance web applications. I specialize in React.js, Next.js, Node.js, TypeScript, MongoDB, PostgreSQL, and MERN Stack development,...Hi, I'm Eng Touhidul Islam. I'm a Top Rated Full Stack Developer with 10+ years of experience helping startups, businesses, and agencies build modern, secure, scalable, and high-performance web applications. I specialize in React.js, Next.js, Node.js, TypeScript, MongoDB, PostgreSQL, and MERN Stack development, helping businesses build reliable digital products that solve real-world challenges. I don't just write code. I understand your business goals, users, and requirements first, then build solutions that are easy to use, maintain, and scale. From frontend development and backend architecture to database design, API development, third-party integrations, cloud deployment, testing, and ongoing support, I handle the complete development lifecycle. Whether you need a SaaS platform, startup MVP, custom web application, CRM, ERP system, e-commerce platform, marketplace, booking system, admin dashboard, customer portal, or AI-powered application, I can help transform your idea into a reliable product. What I Can Build:--- ➥ SaaS Applications & Multi-Tenant Platforms ➥ Startup MVP Development ➥ Custom Web Applications ➥ CRM & ERP Systems ➥ E-Commerce Platforms ➥ Multi-Vendor Marketplace Platforms ➥ Booking & Reservation Systems ➥ Customer Portals ➥ Admin Dashboards ➥ Business Automation Systems ➥ Real-Time Applications ➥ AI-Powered Applications ➥ REST APIs & Third-Party Integrations Technical Expertise:---- Frontend Development → React.js → Next.js → TypeScript → JavaScript (ES6+) → HTML5 → CSS3 → Tailwind CSS → Material UI → Bootstrap → Redux Toolkit → Zustand → Responsive Web Design Backend Development → Node.js → Express.js → NestJS → REST API Development → GraphQL → JWT Authentication → OAuth Integration → NextAuth.js → Webhooks → Microservices Database Development → MongoDB → PostgreSQL → MySQL → Firebase → Supabase → Mongoose → Sequelize → Database Design & Optimization Cloud & DevOps → AWS EC2 → AWS S3 → AWS Lambda → AWS CloudFront → Docker → Linux → Nginx → CI/CD Pipelines → Vercel → Git & GitHub AI & API Integrations → OpenAI API → Google Gemini API → Claude API → AI Chatbots → AI Automation → AI-Powered Applications → Stripe → Razorpay → PayPal → Twilio → WhatsApp Business API → CRM Integrations → Payment Integrations → Email & SMS APIs 📩 Send me a message or invite me to your project. Let’s build something reliable, maintainable, scalable, and ready for real-world use. less -
Hire falgunpatel83
I have 20+ years of experience in IT industry which includes complex ERP implementation, Roadmap design to simple excel reporting using macro. This vast experience allows me envision the end product for my customers specially in cases where customers themselves have very vague understanding of the requirements. I am...I have 20+ years of experience in IT industry which includes complex ERP implementation, Roadmap design to simple excel reporting using macro. This vast experience allows me envision the end product for my customers specially in cases where customers themselves have very vague understanding of the requirements. I am based out of Melbourne, Australia and flexible to work in various time zones. less -
Hire arturg6
Hello and welcome! I am a Full Stack Developer, AI Engineer, and Mathematics Researcher with a strong academic background in mathematics, scientific computing, machine learning, and software development. My experience combines advanced mathematical problem-solving, research methodology, and modern software...Hello and welcome! I am a Full Stack Developer, AI Engineer, and Mathematics Researcher with a strong academic background in mathematics, scientific computing, machine learning, and software development. My experience combines advanced mathematical problem-solving, research methodology, and modern software engineering to create efficient, scalable, and intelligent solutions for businesses, startups, and individuals. ===== Academic Background ===== ✓ Master's Degree in Mathematics ✓ Doctoral Research Experience in Mathematics ✓ Published Research Author ✓ Scientific Computing & Mathematical Modeling ✓ Advanced Statistics & Data Analysis ===== Development Expertise ===== - Frontend Development • React.js • Next.js • Vue.js • TypeScript • JavaScript (ES6+) • HTML5, CSS3, Tailwind CSS - Backend Development • Node.js & Express.js • Python (Django, Flask, FastAPI) • PHP & Laravel • RESTful APIs • Authentication & Security - Database Systems • PostgreSQL • MySQL • MongoDB • SQLite • Database Design & Optimization ===== Artificial Intelligence & Data Science ===== • OpenAI & ChatGPT Integration • AI Chatbot Development • LangChain Applications • Machine Learning Solutions • Natural Language Processing (NLP) • TensorFlow & PyTorch • Data Analytics & Visualization • Predictive Modeling • Automation & Intelligent Workflows ===== Cloud & DevOps ===== • AWS Cloud Services • Google Cloud Platform (GCP) • Docker & Kubernetes • CI/CD Pipelines • Linux Server Administration • Nginx & Apache • Infrastructure Automation ===== Mathematics & Research ===== My mathematical background enables me to approach projects with strong analytical thinking and precision. Areas of interest include: • Machine Learning • Graph Theory • Optimization Algorithms • Statistical Analysis • Scientific Computing • Linear Programming • Mathematical Modeling • Data Mining ===== Why Choose Me? ===== ✓ Strong Problem-Solving Skills ✓ Research-Oriented Mindset ✓ Clean & Maintainable Code ✓ Fast and Clear Communication ✓ Reliable Project Delivery ✓ Scalable and Secure Solutions ✓ Long-Term Technical Support ===== My Goal ===== To help clients transform ideas into high-quality digital products through modern web technologies, artificial intelligence, and data-driven solutions. Whether you need a web application, AI-powered system, automation workflow, API integration, database solution, or custom software, I am ready to help bring your vision to life. Feel free to contact me to discuss your project. less -
Hire dataspro
Hi, my name is Anthony Muñoz, Senior Software Engineer and Founder of DSPro, a software development company specialized in custom software, web applications, APIs, AI automation, cloud infrastructure, DevOps, and scalable business solutions. I help businesses turn ideas, manual processes, and technical problems into...Hi, my name is Anthony Muñoz, Senior Software Engineer and Founder of DSPro, a software development company specialized in custom software, web applications, APIs, AI automation, cloud infrastructure, DevOps, and scalable business solutions. I help businesses turn ideas, manual processes, and technical problems into reliable software products. Whether you need a new platform, a website, an API integration, automation, cloud deployment, or a dedicated development team, I can help you design, build, launch, and maintain it. My focus is not only writing code, but delivering real business value: better systems, faster processes, cleaner architecture, and software that can scale. What I Can Help You With Custom Software Development Web Application Development Website Development SaaS and MVP Development API Development and Third-Party Integrations Backend Development Frontend Development Mobile App Development Software Architecture Database Design and Development AI Automation and OpenAI Integrations Business Process Automation Data Scraping, Data Mining, and Data Engineering Cloud Infrastructure and DevOps AWS, Google Cloud, and Azure Deployments Docker, Linux, CI/CD, and Server Administration E-commerce Development Shopify, WordPress, and WooCommerce Development Payment Gateway Integrations Cybersecurity Reviews and Vulnerability Testing QA Automation and Software Maintenance Dedicated Development Teams / Staff Augmentation Technologies I Work With Languages: Python, JavaScript, TypeScript, Java, Go, C#, .NET, PHP, Ruby, Solidity, Bash Frontend: React.js, Next.js, Vue.js, Angular, HTML, CSS, Figma, UI/UX Design Backend: Node.js, Express.js, Django, Flask, FastAPI, Laravel, Spring Boot, ASP.NET Core, Ruby on Rails, REST API, GraphQL Databases: MySQL, PostgreSQL, MongoDB, SQL Server, Redis, BigQuery Cloud & DevOps: AWS, Google Cloud, Azure, Docker, Kubernetes, Linux, CI/CD, GitHub Actions, Azure DevOps, Cloud Run, Firebase AI, Data & Automation: OpenAI, AI Agents, Machine Learning, Pandas, Jupyter Notebook, Data Engineering, Data Mining, Business Intelligence, Automation Workflows E-commerce & CMS: Shopify, WordPress, WooCommerce, Custom E-commerce Platforms, Payment Gateway Integration Why Work With Me? I bring a combination of senior engineering experience, business understanding, and a reliable delivery process. Through DSPro, I can support projects as an individual senior developer or provide a complete nearshore development team when the project requires more capacity. You can expect: Clear communication Clean and scalable code Business-focused recommendations Reliable delivery Long-term technical support Experience with real production systems Ability to work with startups, small businesses, and enterprise projects less -
Hire badarmadni927
badarmadni927 badarmadni927
$35 USD / hour
⭐ Top 1% Full-Stack | AI | LLM | IOS | WEB | APP|PakistanI’m a Top-Rated Full-Stack Developer helping startups and businesses design, build, and scale modern web, mobile, and AI-driven applications. My focus is not just development — but delivering reliable systems that perform at scale. What I Deliver: ✅ AI-driven applications & intelligent automation ✅ Custom web &...I’m a Top-Rated Full-Stack Developer helping startups and businesses design, build, and scale modern web, mobile, and AI-driven applications. My focus is not just development — but delivering reliable systems that perform at scale. What I Deliver: ✅ AI-driven applications & intelligent automation ✅ Custom web & mobile app development (end-to-end) ✅ SaaS platforms & business systems ✅ E-commerce solutions & integrations ✅ Clean UI/UX with performance in mind ✅ Robust backend systems & API architecture ✅ Application optimization & scaling ✅ Secure deployments, testing & CI/CD workflows Tech Stack: ✅ Frontend: React, Next.js, TypeScript, Angular,Bootstrap,Tailwind css, shade cn ✅ Backend: Node.js, Express, Django, Laravel, Next js. ✅ Databases: PostgreSQL, MongoDB, Supabase, Prisma ✅ Mobile Apps: React Native (iOS & Android) & Flutter ✅ AI Systems: LLM integrations, RAG apps, AI agents I work closely with clients to transform ideas into production-ready products — focusing on scalability, performance, and long-term maintainability. less
