J2EE Developers For Hire
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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 johibkhan
With 10+ years of experience in software application development, I have worked with Avaya, Pramati, CGI, Yash, GMS, Vcentric, Meta-io, CTI Services, and MMTex. My core strengths are problem-solving, algorithms, system design, and building high-performance, low-latency systems for complex real-time workloads. I...With 10+ years of experience in software application development, I have worked with Avaya, Pramati, CGI, Yash, GMS, Vcentric, Meta-io, CTI Services, and MMTex. My core strengths are problem-solving, algorithms, system design, and building high-performance, low-latency systems for complex real-time workloads. I specialize in efficient coding, performance optimization, scalable architectures, and event-driven systems. Over the past 8+ years, I have led teams delivering trading, fintech, SaaS, AI/ML, automation, and IoT-based platforms. I am an AI/ML expert with deep experience in algorithmic trading, AI-driven signal generation, predictive analytics, reinforcement learning, NLP, and market regime detection. I work with Python, TensorFlow, PyTorch, Scikit-Learn, backtesting engines, walk-forward optimization, portfolio/risk-based position sizing, WebSockets, FIX, tick-level data, and order books. I also have experience in OMS/EMS, smart order routing, PnL/drawdown control, kill-switch mechanisms, blockchain/DeFi trading, automation bots, and cybersecurity including VAPT, secure coding, and API/network/cloud security. Mobile App Development ✅ Trading & fintech mobile apps with real-time data, charts, and alerts ✅ Flutter, React Native, Swift, Kotlin ✅ Secure APIs, backend integration, CI/CD, monitoring ✅ App Store / Play Store deployment and performance tuning Web & IoT / Embedded Systems ✅ IoT dashboards, device monitoring, telemetry, and real-time tracking ✅ Sensor data processing and hardware-to-software integration ✅ MQTT, WebSockets, REST APIs, serial communication, CAN/RS485 ✅ Edge device integration, alerts, logging, and cloud connectivity Frameworks ✅ Spring, Django, FastAPI, Laravel, ASP.Net, Nest.js, Next.js, Nuxt.js, React, Vue, Angular, Web3.js Backend Development ✅ Java, Python, Node.js, PHP, Laravel, ASP.Net, Go, Ruby, C++ ✅ Async systems, message queues, real-time processing Frontend & UI ✅ JavaScript, TypeScript, React & Redux, Vue, Angular, SCSS, Webpack, performance optimization Databases ✅ MySQL, PostgreSQL, Oracle, SQL Server, Cassandra, CouchDB ✅ Time-series and high-frequency data handling ✅ Supabase, Firebase, Firestore DevOps, Cloud & Infra ✅ Docker, Git, SonarQube, JMeter, Selenium ✅ AWS, Google Cloud, Azure, OpenStack ✅ Linux/Unix, Nginx, Apache, Tomcat, SSL ✅ High-availability, failover, monitoring Architecture ✅ Microservices, SOA, Event-Driven & Distributed Systems Portfolio & Live Applications GitHub https://github.com/viz-centric https://github.com/firee321/public.moneybox.au IoT / Hardware / Inspection Reference https://github.com/johibkhan2/Multi-Recorder https://pordoinspect.com/ Live Applications https://www.moneybox.au https://appwise.net.au/ https://pordoinspect.com/ https://serbob.com/ 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 techassist7865
techassist7865 techassist7865
$35 USD / hour
Vibe coding clean-up specialist, Full stack Dev.PakistanI have over 10+ years of expertise being a Full-stack developer, Solution Architect, and Technical Business Analyst. Over the course of my Freelancing career, I have actively participated in the successful completion of software projects in the following niches. - B2B Marketplace. - FinTech. - SaaS. - B2C...I have over 10+ years of expertise being a Full-stack developer, Solution Architect, and Technical Business Analyst. Over the course of my Freelancing career, I have actively participated in the successful completion of software projects in the following niches. - B2B Marketplace. - FinTech. - SaaS. - B2C Marketplace. - Generative AI (GPT API, Custom API, or similar). - Cross Platform Application development. - Progressive Web App (PWA). - Web Scraping & Software Automation. - DevOps. - CMS. - IoT (Internet of Things). - ELT & ETL. - Vibe Coding clean-up specialist. - Agentic AI and MCP development. - Prompt Engineering. My play area, - Web Application development: Bootstrap, Tailwind, Ant Design, React.js, Three.js, Angular.js, Vue.js, TypeScript, JavaScript, Node.js, Express.js, Next.js, Nest.js Nuxt.js, MEAN Stack, MERN Stack, Lambda functions, ASP.net core, Django, Java Spring Boot, ROR, Python, PHP ( Laravel, CodeIgniter (CI) ), Stripe, Twilio, Zapier, and Plivo. - Desktop Application Development: Flutter, PyQT, Vb.net, C#.net. - Mobile Application Development: React Native, Flutter, Xamarin, Kotlin, Swift. - IoT: Node-red. - CMS: WordPress, Shopify, Bubble.io, Wix, Moodle, Magento, Drupal, Webflow, BigCommerce, Squarespace. - Web Scrapping & Software Automation. Python, Selenium web driver, Puppeteer, Proxy mapping (Residential & Commercial), Captcha Verification. - UI/UX Prototyping: Figma, Adobe XD, Adobe Illustrator, Adobe Photoshop. - DevOps: CI/CD, Amazon Web Services (AWS), AWS Amplify, Google Cloud Platform (GCP), Heroku, Smartfox server (Multiplayer Game Server). - DB and RDBMS: PostgreSQL, Mongo DB, MySQL, No SQL, Indexed DB, MS SQL. - AI: Prompt Engineering, Integration and customisation using Open AI, Google Gemini, Deepseek. Chat Bot development. - Game Development: Unity, AR, VR, Three.js, Unreal. Why me? - Meticulous Attention to Detail. ❤️ - Over 350K lines of code written. - Flexible working hours as per your need. - Seamless Collaboration. - Swift Execution. - Dependable & Efficient. - Fluent in English. Elevate your project to new heights with my proven expertise, unparalleled creativity, and unwavering commitment to excellence. Let's embark on this thrilling journey together and craft a masterpiece that will leave a lasting impression. So what are you waiting for? Your dev and IT assistance is just one click away. Simply hit the "Hire Me" button and let's get this started. less -
Hire ShahinurMithun
Great Software Starts with the Right Questions. Let's Start There. We've delivered more than 500 successful projects for clients across nearly every continent. But what we're proudest of isn't the number—it's that many of our clients return to us for their next project. I'm Shahinur, Founder & CEO of OrFactor. Our...Great Software Starts with the Right Questions. Let's Start There. We've delivered more than 500 successful projects for clients across nearly every continent. But what we're proudest of isn't the number—it's that many of our clients return to us for their next project. I'm Shahinur, Founder & CEO of OrFactor. Our team of 70+ engineers designs and builds custom software, SaaS platforms, mobile applications, AI-powered solutions, and cloud infrastructure for startups, growing businesses, and enterprises. We don't simply build what we're asked to build. We challenge assumptions, identify risks early, and recommend better solutions whenever we believe they'll lead to a stronger product. Once we commit, we deliver. What We Build – Product strategy & technical architecture – Modern UI/UX design – Full-stack web & mobile development – API & third-party integrations – Cloud infrastructure & DevOps – AI agents & intelligent automation How We Work With You – Dedicated Project Manager – Daily progress updates – Complete source code ownership – Post-launch support & long-term maintenance Technologies We Work With Frontend: React • Next.js • Angular • Vue.js • TypeScript • Tailwind CSS Backend: Node.js • Java (Spring Boot) • PHP (Laravel) • Python (Django) • .NET Core • Ruby on Rails • Perl Mobile: Flutter • React Native • Swift • Kotlin Databases: PostgreSQL • MySQL • MongoDB • Redis • Firebase Cloud & DevOps: AWS • Microsoft Azure • Google Cloud • Docker • Kubernetes AI & Intelligent Automation: OpenAI • Claude • OpenAI Agents SDK • LangGraph • CrewAI • TensorFlow Whether you're launching an MVP, modernizing a legacy platform, or building a large-scale enterprise solution, our focus is the same: delivering software that is reliable, scalable, and built to last. If you're looking for a development partner who values long-term success over short-term sales, we'd be happy to discuss your project—even if that means recommending a simpler solution than you expected. less -
Hire EndMorse
As a full stack developer , I got lots of tech stack in my hand , like springboot、springMVC、springCloud、Mybatis、MybatisPlus、Hibernate、Redis、MySQL、Oracle、JS、Vue2 、Vue 3、HTML + CSS 、Tomcat、Nginx balabala , that can lead me to build up any project that I face;As a full stack developer , I got lots of tech stack in my hand , like springboot、springMVC、springCloud、Mybatis、MybatisPlus、Hibernate、Redis、MySQL、Oracle、JS、Vue2 、Vue 3、HTML + CSS 、Tomcat、Nginx balabala , that can lead me to build up any project that I face; less -
Hire zameerfaiz
As a seasoned software developer with a strong background in delivering custom tailored software solutions with a focus on Health Care IT solutions, I bring a decade of experience and expertise to the table. With a career spanning Java, JavaFx, and .NET technologies, I have successfully delivered a diverse range of...As a seasoned software developer with a strong background in delivering custom tailored software solutions with a focus on Health Care IT solutions, I bring a decade of experience and expertise to the table. With a career spanning Java, JavaFx, and .NET technologies, I have successfully delivered a diverse range of web and desktop applications. Key Highlights: Versatility: Proficient in a wide array of technologies, including Java, C#, React, Angular, and IoT development using Raspberry Pi and Arduino. Client-Centric Approach: I'm dedicated to delivering not only high-quality work but also ensuring complete client satisfaction. Going the extra mile is a standard practice for me. I optimize for predictable delivery: clear milestones, weekly demos, and production-ready code. Why Me? Proven Track Record: 4.9/5 star rating and delivered 43 successful projects Reliability: I take pride in consistently meeting deadlines and adhering to project budgets. Exceptional Expertise: Clients trust my in-depth knowledge, quality of work, professionalism, and strong communication skills. Let's Collaborate: I look forward to the opportunity to work with you, leveraging my skills and dedication to bring your project to fruition. less -
Hire bhardwaj786
Welcome to Appquipo! We are a Mobile Application Development team that is well-respected for our captivating, innovative, and one-of-a-kind mobile app designs. Our certified team of App Experts has more than 10 years of comprehensive experience in this field and has worked with some absolutely phenomenal clients to...Welcome to Appquipo! We are a Mobile Application Development team that is well-respected for our captivating, innovative, and one-of-a-kind mobile app designs. Our certified team of App Experts has more than 10 years of comprehensive experience in this field and has worked with some absolutely phenomenal clients to create a stunning portfolio of work. Through our expertise, we offer the following services: ✅Salesforce Expertise – Commerce Cloud, Marketing Cloud, Sales Cloud, Service Cloud, Analytics, Salesforce Einstein, Salesforce -- CRM, Salesforce Mobile App ✅eCommerce Expertise-- Magento 2, Shopify, BigCommerce, WooCommerce, OpenCart, Shopware, ✅Languages Expertise -- PHP(CorePHP, Laravel, Cakephp, Yii, Yii2, Symfony, CodeIgniter, Zend), Angular, Node, React ✅Mobile Platforms - iOS, Android, Xamarin, Flutter, ionic Phone-gap, React Native, All On-Demand App ✅Software – ERP & CRM Development, SaaS products, Database Solutions Management, Supply Management, HRM, Booking Software, e-Learning As you can see, our offerings encompass a number of areas, and we can confidently say that we deliver some of the best services and assets in each of these areas. Whether you need a new app built, or an existing app reconfigured or edited, we will work with you to fix all your problems. We do this through consistent communication and in-depth planning and brainstorming. We will also meet all deadlines and budgetary limits, so there never needs to be any stress about deliverables. If you’re interested in working with us, you can reach us on Freelancer, where our team will gladly answer any questions you may have about our work, portfolio, reviews, or skill set. So please, let us know how Appquipo can help you today! less -
Hire natesd
Staff-level software engineering with 20+ years building production systems for startups and global companies including Cisco Systems and Qualcomm. We design and deliver complete solutions end-to-end, from low-level real-time infrastructure to full-stack web and mobile applications. ✅Python & PHP ✅Scraping...Staff-level software engineering with 20+ years building production systems for startups and global companies including Cisco Systems and Qualcomm. We design and deliver complete solutions end-to-end, from low-level real-time infrastructure to full-stack web and mobile applications. ✅Python & PHP ✅Scraping ✅Microsoft365 ✅Automation ✅Full-Stack ✅Mobile ✅Web3 ✅Power BI ✅AutoCAD ✅Engineering ✅Microcontroller ✅2D & 3D Design ✅Game ✅Audio ✅Embedded Systems ✅Solidworks ✅Circuit Design ✅Architectual Design What we do: - Real-Time & Performance-Critical Systems — low-latency apps, streaming, audio/video, embedded firmware - AI Integration — RAG systems, speech processing, LLMs built into real products - Full-Stack & Mobile — modern web apps and cross-platform mobile on solid backend architecture - Business Automation — Power Automate, Excel/VBA, Power BI dashboards, Sage, Office integrations - CAD & 3D — Solidworks, AutoCAD, STL modeling, HVAC load calculations - Web Platforms — WordPress, Joomla, Shopify, PHP less
