I am senior software engineer having more than 8 years of experience designing & developing products based on below technologies- Backend: ✔ Spring Boot / Java EE / kotlin / Java ✔ Microservices / Kafka / RabbitMQ ✔ REST API / SOAP ✔ Spring security / OAuth ✔ Twilio / social / azure ad ✔ JPA / Hibernate ✔ Tomcat / glassfish ✔ Junit / mockito ✔ Azure / AWS services Database: ✔ MySql / mongodb / LDAP / Postgresql Frontend: ✔ Ionic with angular ✔ Angular / React / TypeScript ✔ JSP / JSF / Thymleaf ✔ HTML5 / CSS BI tools: ✔ jaspersoft studio / jasper server / ireport Others: GIT / tortoise SVN / IntelliJ / netbeans / eclipse / vs code / JIRA / STS Feel free to contact!

I am a Software Engineer with 15 years of experience in application development and infrastructure. Over the years, I have worked across a wide range of technologies, designing and implementing high-performance solutions in both cloud and on-premise environments. My expertise lies in AWS, where I have developed, deployed, and optimized cloud-based applications. I am comfortable navigating between development and DevOps, ensuring seamless integration between software and infrastructure. In addition, I have solid experience with Go and Java, leveraging them for cloud-native applications and high-efficiency systems.

Hi, my name is Chirag Patel and I'm working as a full-stack developer. I have more than 10 years of experience in developing enterprise portals. I'm having experience in both the frontend and backend. ​I have experience in software design, software development, and software testing using Java technology. I have worked on projects in various sectors like Insurance, Health, Logistics, E-commerce, Utility, etc. Below are the backend and front end skills I have but it is not limited to this only : Backend : - Worked on the frameworks - Spring, Hibernate, Spring Boot, JSF, Primefaces. - Rest and Soap API development - Experienced in microservices development - Extensive experience in Liferay Portal Development with versions 7.x DXP, 6.x. - Expertise in object-oriented analysis, design principles, and various J2EE design concepts. - Strong experience in Apache tomcat webserver - Hands-on ant, maven, gulp, and Gradle build tools. - Experienced in application deployment and performance tuning. - Worked on writing unit tests, integration tests, selenium tests etc. - Experience with containerization technologies like Docker and orchestration tools like Kubernetes. - Familiar with Unix and scripting languages - Experience to use the OAuth mechanism for User Authorization - Expertise in third party plugin/app integrations - Experience with AWS cloud technology i.e. EC2, RDS, ElastiCache, etc.. - Familiarity with DevOps practices and tools for CI/CD. - Familiar with the deployment cycle, and manage multiple environments builds. - Hand on experience to communicate with business stakeholders to understand long & short-term business needs. Frontend : - Expertise in Html, CSS, JS, jQuery, Bootstrap, velocity, Freemarker. - Experience creating good architecture in ReactJS - React Js - React hook - Redux - Functional components - Material UI Database - Postgres, Mysql, Oracle, MariaDB, No Sql - MongoDB Project Management and Code version - Hands-on SVN, GITHUB, BITBUCKET, Jira, Confluence, etc.. - Experience in a Self-organized, Agile, Test Driven Environment Let's connect to discuss this in detail. Thank you

Senior Java Software Architect with 15+ years of experience designing, developing, and delivering high-quality enterprise software solutions. Proven expertise building complex systems from scratch, modernizing legacy applications, and untangling long-standing technical issues in mission-critical Java environments. Recognized for reliability, technical depth, and consistent delivery of clean, maintainable, and scalable software. Core Technical Expertise Java & Enterprise Development: Spring Boot, Spring Batch, J2EE, EJB 2.0/2.1, JMS, Java Swing, JSF (PrimeFaces, RichFaces), JBOSS Frontend & App Development: Angular, AngularJS, React, TypeScript, PowerApps Portal & CMS: Liferay 6.2 / 7.0 Backend & Web Technologies: PHP, REST APIs, Microservices Cloud & DevOps: Kubernetes, AWS, CI/CD, containerized architectures Architecture & Design: Distributed systems, performance optimization, legacy modernization, system integration Professional Strengths Architected and implemented full-stack applications from the ground up using best-practice design patterns and modern development standards. Expert at analyzing, stabilizing, and refactoring complex or poorly structured Java applications — often resolving issues that remained unsolved for years. Strong communication and leadership skills, delivering clear solutions and prompt, high-quality results. Highly reliable, self-motivated, and committed to producing accurate and maintainable software aligned with business goals.

I’m a Full Stack Developer with 3+ years of experience, highly skilled in AI workflows, pipeline automation, LLM integration, and building cost-efficient, scalable applications using Java (Spring Boot), Node.js (Express.js), and React.js. I design and develop production-ready systems by combining backend depth with cloud infrastructure, frontend precision, and machine learning integration. 🌟 My Specialization 💻 Backend Development • ✔️ Java (8, 11, 17): Lambdas, Streams, DateTime API, Functional Interfaces • ✔️ Java EE Stack: JPA, Hibernate, Servlets, EJB, JAX-RS, JAX-WS, Apache CXF • ✔️ Spring Frameworks: Spring Boot, Spring Data JPA, Spring Batch, Spring Cloud • ✔️ Node.js & Express.js: REST APIs, scalable backend services • ✔️ Messaging Systems: Kafka, Zookeeper, RabbitMQ, ActiveMQ 🤖 AI, LLMs & Data Annotation • ✔️ Integrated Large Language Models (LLMs) like GPT for automation & decision support • ✔️ Developed AI-powered SaaS systems with NLP pipelines and feedback collection • ✔️ Built automated complaint resolution tools with Twilio + Eleven Labs • ✔️ Designed and deployed data annotation tools for supervised learning workflows • ✔️ Managed end-to-end AI pipelines from prompt generation to API inference • ✔️ Created custom workflows for data labeling, cleaning, and augmentation 🛠️ Data Engineering • ✔️ Designed and implemented ETL pipelines for structured & unstructured data • ✔️ Experience with data ingestion, transformation, and aggregation in distributed systems • ✔️ Leveraged Redis, PostgreSQL, and MongoDB for real-time and batch analytics • ✔️ Integrated structured product and user data into ML pipelines 🌐 Frontend Development • ✔️ React.js: Component architecture, Hooks, Context API, Zustand/Redux • ✔️ UI Libraries: Tailwind CSS, PrimeFaces, Bootstrap • ✔️ Templating Engines: Thymeleaf, JSP, JSF 🗄️ Database Management • ✔️ SQL: PostgreSQL, MySQL, SQL Server, Oracle • ✔️ NoSQL: MongoDB, Redis ☁️ Cloud & DevOps • ✔️ AWS: EC2, S3, RDS, Lambda, IAM, Elastic Beanstalk • ✔️ DevOps Tools: Docker, Kubernetes, Jenkins • ✔️ Version Control: Git, GitHub, Bitbucket, VisualSVN ⸻ ✅ Testing & Best Practices • ✔️ JUnit, Mockito, Spring Test, Cypress • ✔️ Clean Architecture, SOLID principles, modular microservices • ✔️ Agile workflow, Git branching strategies, CI/CD automation ⸻ 🚀 What I Offer • 🔹 Full-stack app development (React + Java/Node.js) • 🔹 Custom AI workflows & LLM integration (OpenAI, ElevenLabs, etc.) • 🔹 Data engineering pipelines & annotation systems • 🔹 Cloud-native scalable deployment • 🔹 Enterprise-grade APIs with secure authentication ⸻ 💡 Why Work With Me? I combine full-stack engineering with AI integration and data expertise, delivering intelligent, scalable platforms. Whether you’re building an eCommerce product, AI-driven tool, or a data-labeled training system, I ensure it’s fast, secure, and cost-efficient. Let’s build something impactful together.

I am a dedicated and enthusiastic Java, Spring boot professional with a profound passion for software development. With a strong foundation in Java and a comprehensive skill set encompassing various technologies, I have been actively contributing to the software engineering field for several years. 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗦𝗸𝗶𝗹𝗹𝘀: My expertise spans a wide range of technologies, including Java , Spring MVC, Spring Boot, Spring Data, Spring Security, DDD, REST API, Hibernate, JPA, JSP, JSF, FTL, Sitemesh, XML, Groovy, Grails, GSP, Grails ORM, Oracle, MySQL, PostgreSQL, HTML, CSS, Bootstrap, JavaScript, jQuery, AJAX, Git, Gradle, Jira, Weblogic, Tomcat, CRON, Jrebel, Xrebel, OBI, and Linux. 𝗪𝗵𝘆 𝗵𝗶𝗿𝗲 𝗺𝗲? I thrive on continuous challenges and am driven by a genuine love for building software. My commitment to excellence, coupled with a keen interest in learning new technologies, positions me as a valuable asset for any software development project. If you are seeking a dedicated Java professional with a proven track record of success, I am eager to contribute my skills and experience to your project.

🌍 AissamGIS Engineer with 10+ Years of Expertise As a GIS Engineer with more than 10 years of experience, I bring a deep passion for geospatial technologies, spatial analysis, and remote sensing. My journey has been marked by a commitment to delivering impactful geospatial solutions that drive efficiency, accuracy, and innovation. Throughout my career, I have: - 📊 Led complex GIS projects for various government administrations, automating workflows and integrating cutting-edge technologies to optimize spatial operations. - 🌐 Developed robust GIS web applications, ensuring seamless user experiences and efficient data visualization for stakeholders. - ⚛️ Created custom plugins and scripts, enhancing QGIS and ArcGIS Pro to automate spatial workflows and improve data processing efficiency. - 🔍 Conducted extensive spatial analyses, working with both vector and raster data to derive actionable insights for critical decision-making. - 🎨 Focused on high-quality map design, ensuring visual clarity and precision for effective communication of spatial information. - 🛠️ Proficient in QGIS, ArcGIS Pro, and ArcGIS Online, with hands-on experience in programming plugins for both QGIS and ArcGIS Pro. My expertise lies in "transforming complex spatial data into actionable insights", streamlining workflows, and delivering solutions that are both technically robust and visually compelling. I’m passionate about collaborating closely with clients to understand your unique challenges and tailor geospatial solutions that drive real-world results. Let’s work together to bring your geospatial projects to life, combining my technical knowledge with your vision to create exceptional, scalable, and impactful solutions. 🚀

I am a top-rated plus freelancer on Upwork, having completed many Healthcare projects in Android and iOS development using Swift, Objective-C, Kotlin, and Java. With 15 years of experience in mobile and web application development, I represent Technosoft Solutions, a company focused on healthcare software development. Technosoft is known for its exceptional Java/J2EE, .Net, Angular, React, Android, and iOS development capabilities, I bring a proven track record and strong references to the table. Our team is distinguished by its excellent communication skills and familiarity with JIRA and Trello, seamlessly integrating with on-site teams through daily scrums and status calls. Our specialization in healthcare software development has led us to focus primarily on solutions for the U.S. market. Over our 15-year journey, we have developed numerous web and mobile applications for hospitals, pharmacies, physicians, patients, and device manufacturers. Our software is deployed in over a thousand U.S. hospitals and clinics, demonstrating our deep understanding of HL7, HIPAA, EDI, and other healthcare standards. Our portfolio includes a wide range of applications tailored to various healthcare needs, including chronic care, rehabilitation, mental health, burn care, and more. We provide comprehensive HIPAA implementation services, from application compliance to security training, audits, vulnerability testing, and facility compliance. As a HIMSS-certified healthcare security professional since 2002 and a longstanding member of the Upwork community since 2006, my commitment to quality and customer satisfaction is reflected in our 100% success rate and five-star ratings. At Technosoft, we pride ourselves on developing scalable applications that serve over 150,000 users and more than 1,000 hospitals and clinics across the USA. Our Harvard University graduate leadership, coupled with an affordable hourly rate starting at $18, ensures the highest quality of service. Our consistent 100% success rate over the last decade is a testament to our dedication and focus on quality software development. We invite you to review our portfolio and customer feedback to see the unparalleled level of service we provide. Give us the opportunity to demonstrate our capabilities and commitment to excellence.

UI Technologies AngularJS Framework, Node.js, AJAX, JQuery, Web-Sockets, Socket-IO, D3.js (beginner), Twitter Bootstrap Web Related HTML, XML, XSD, WSDL, UML, HTML5, CSS3, HTML5 Video, socketio.js, angular- webpack. J2EE Technologies J2EE, Servlets ,JSP, EJB , Web-services(REST, SOAP) ,JSF 1.2, J2EE Design Patterns Open Source technologies Apache ActiveMQ, JADE(Java Agent Development), Apache Camel, Kafka, Spring- LDAP, OpenLDAP Languages Core Java , JavaScript, C++ Databases Oracle 9i,Teradata, Postgres, HBase Operating System Windows NT, 9X, 2000, XP ,VISTA, Windows 7, MAC OSX, Ubuntu 10.X + Servers JBoss Server 4./4.2, Apache Tomcat, TomEE, IBM WebSphere, Wildfly Source Code Maintenance and Deployment SVN, Git, Maven, Jenkins, Sonar, HP Fortify Cloud Amazon EC2 services, Azure Media Services. Testing JUnit, Postman, SOAP-UI Tools Used Eclipse 3.2 and above, Toad( For Oracle),SOAP-UI 4.5 and above, Visual Studio Code, Sublime Text, Aqua Data Studio(for Oracle and Teradata), PGAdmin3(Postgres), WinSCP, Putty, Google Chrome JavaScript Developer tools.

✨ Highly accomplished and top-rated Upwork developer with 15+ years of experience in Java/Android/Flutter/React Native/ React.JS /AI Integration. ✨ 11,000+ hours in hourly projects, 17,000+ hours in fixed cost projects. ✨ Developed 60+ mobile apps from scratch with backend. ✨ Deployed 15+ enterprise web applications on cloud services. ✨ Achieved 100% client satisfaction and consistently delivered top-quality results. ✨ Self-motivated, detail-oriented, punctual, and fast learner. ✨ Strong troubleshooting and debugging skills. ✨ Turn your idea/concept into reality with my expertise. ✨ Proficient in Node, Java, Spring Framework, JSF, EJB, JPA, Hibernate, Maven, Jetty. ✨ Skilled in Android SDK, React Native, Flutter, NDK, BT LE device integration, and performance improvement. ✨ Experienced in IOT, AR/VR, Machine Learning. ✨ Expertise in REST API, Web Service, XML, JSON, HTML5, Angular, Reactjs, Bootstrap. ✨ Integration with social platforms like Facebook, Twitter, Google+, Linkedin. ✨ Familiarity with cloud services like AWS, Google Cloud Platform, Azure and Firebase. ✨ Proficient in GPS, Location Based Services, Push Notification. ✨ Experienced in Payment Gateway integration: PayPal, ZooZ, Stripe, Braintree, Payfort. ✨ Familiar with project management tools: Asana, Basecamp, Git, SVN, Jira, Mantis, Trello, Slack.