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Results-driven system developer with more than 10 years of development experience using java. Having a strong technical background who possesses self-discipline and the ability to work with the minimum of supervision. Able to play a key role throughout the software development / support life cycle of a project to ensure the quality solutions meet business objectives. Also highly accomplished with a verifiable track record in fields such as analysis and gathering, business process mapping and the development of interactive prototypes.

I am a Java Web Developer, working as freelancer, mainly in Upwork. I am very passionate with Java and JVM technologies. My experience mostly in developing Software As A Service (SaaS) platform, business computing and information system area, using Bootstrap, Angular JS or JSF as UI Components or web framework, Spring Core, Spring MVC or JBoss Seam as Restful API endpoint and or Integration framework, and Hibernate as favorite Java Persistence API (JPA) implementation wrapped by Spring Data component. If my clients requires no casual application or web server, I like to use Spring Boot for simpler development and deployment of the application. I am also interested in database design and software design. I believe that great software not only mediocre work of typing, but also comes from thoughtful process. I believe in TDD, and also believe that tests code must be written, organized as good as the source code it self and is integral part of the source code. I am a quick learner, and In my spare-time, I am writing some personal open source project and small proof-of-concept about java-related stuff in my GitHub public repository. My primary machine is linux desktop with 1TB NVMe SSD and 64GB or RAM. I have macbook pro 15 for testing purpose and to allow me mobile occasionally, if needed. Communication is important in remote work, and for this purpose I have 2 link dedicated internet connections to my workspace. If you need my detailed skill abilities, below is what I have experienced in: - Software Design, Database Design, and microservices/Micro-services/micro services architecture. - JPA 1.0, JPA 2.0, with Hibernate. - Bean Validation Specification with Hibernate Validator. - Dependency Injection with Java DI (JSR-330), Java Context and Dependency Injection for Java EE Platform (JSR-299), and Spring Core as most popular (but non-standard) Java Dependency Injection Framework. - Java Web Framework with Spring MVC and JSP, or Java Server Faces (JSF) with Facelet and Primefaces. - Spring Boot, Spring Data stack. - Generated / scaffolding web application using JHipster. - Java Web / Application server with Tomcat, Wildfly, or Websphere AS. - Logging with SLF4J as a wrapper to Log4J or Logback. - JUnit or Test NG as testing framework. - Ant, Maven or Gradle as build and dependency management tool. - HTML 5, CSS 3, JavaScript, JQuery, Twitter Bootstrap, transparency.js, and angular / angular.js - Third Party API such as Xero API, Open ERP Java API, Braintree Payment API, Stripe Payment API, and Social APIs. - Linux, Mac or Windows. - MySQL, PostgreSQL, Oracle, or Microsoft SQL Server for RDBMS. - Couchbase or Mongo DB for No-SQL solution. - Elasticsearch (ELK) stack or pentaho for data integration, advanced search, reporting and data analysis solution. Thanks, Resa

I help businesses and startups supercharge operations with smart AI systems and automation. Whether it’s 𝗯𝘂𝗶𝗹𝗱𝗶𝗻𝗴 𝗰𝘂𝘀𝘁𝗼𝗺 𝗔𝗜 𝗮𝗴𝗲𝗻𝘁𝘀, 𝘀𝗰𝗿𝗮𝗽𝗶𝗻𝗴 𝗱𝗮𝘁𝗮, workflow optimization, 𝗱𝗮𝘁𝗮 𝗮𝗻𝗮𝗹𝘆𝘁𝗶𝗰𝘀, 𝗼𝗿 𝗱𝗲𝗽𝗹𝗼𝘆𝗶𝗻𝗴 𝗲𝗻𝗱-𝘁𝗼-𝗲𝗻𝗱 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀. 👨‍💻 𝐖𝐡𝐚𝐭 𝐈 𝐒𝐩𝐞𝐜𝐢𝐚𝐥𝐢𝐳𝐞 𝐈𝐧: ✔ 𝐀𝐈 & 𝐂𝐡𝐚𝐭𝐛𝐨𝐭 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: GPT-4, 𝗟𝗮𝗻𝗴𝗖𝗵𝗮𝗶𝗻, OpenAI, LLM fine-tuning, LLaMA, 𝗔𝘂𝘁𝗼𝗴𝗲𝗻, RAG workflows, Langfuse and more ✔ 𝗦𝗺𝗮𝗿𝘁 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻: Custom bots in 𝗻𝟴𝗻, 𝗠𝗮𝗸𝗲.𝗰𝗼𝗺, 𝗭𝗮𝗽𝗶𝗲𝗿, APIs, cloud deployments and Python – from lead generation, email/calendar automation to CRM workflows ✔ 𝗗𝗮𝘁𝗮 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 & 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴: Predictive modeling, EDA, 𝗽𝗶𝗽𝗲𝗹𝗶𝗻𝗲𝘀, Scraping, processing, and delivering clean, structured data (APIs, dynamic sites) ✔ 𝗙𝘂𝗹𝗹-𝗦𝘁𝗮𝗰𝗸 𝗔𝗜 𝗦𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀: Strategy, architecture, and deployment on 𝗔𝗪𝗦, 𝗚𝗖𝗣, 𝗙𝗮𝘀𝘁𝗔𝗣𝗜, 𝗗𝗼𝗰𝗸𝗲𝗿 💡 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬 𝐘𝐨𝐮 𝐂𝐚𝐧 𝐂𝐨𝐮𝐧𝐭 𝐎𝐧: 📌 Build & deploy AI-powered applications 📌 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗲 𝗿𝗲𝗽𝗲𝘁𝗶𝘁𝗶𝘃𝗲 𝘁𝗮𝘀𝗸𝘀 𝗮𝗻𝗱 𝗯𝗼𝗼𝘀𝘁 𝘁𝗲𝗮𝗺 𝗲𝗳𝗳𝗶𝗰𝗶𝗲𝗻𝗰𝘆 📌 Design intelligent workflows with n8n or custom scripts 📌 Strategic guidance on ML/DL/RL projects 📌 Lead generation, email agents, and LinkedIn automation 📌 Custom chatbot solutions for sales, support, or internal ops 📌 𝗥𝗔𝗚 𝗶𝗺𝗽𝗹𝗲𝗺𝗲𝗻𝘁𝗮𝘁𝗶𝗼𝗻 for data-driven responses. 💼 𝐈𝐝𝐞𝐚𝐥 𝐅𝐨𝐫: 💰 Businesses automating sales, outreach, or internal ops 👑 Teams building AI-powered tools or data workflows 👑 Founders launching AI MVPs or SaaS tools 🚀 𝐖𝐡𝐲 𝐇𝐢𝐫𝐞 𝐌𝐞 ⚡ 𝗦𝘁𝗿𝗮𝘁𝗲𝗴𝗶𝗰 𝗔𝗜 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻: Seamlessly embed AI into your workflow or launch new AI-driven products. ⚡ 𝗔𝗜-𝗣𝗼𝘄𝗲𝗿𝗲𝗱 𝗔𝗻𝗮𝗹𝘆𝘁𝗶𝗰𝘀: Decision-making tools for 𝗳𝗶𝗻𝗮𝗻𝗰𝗲, 𝗿𝗲𝗮𝗹 𝗲𝘀𝘁𝗮𝘁𝗲, 𝗮𝗻𝗱 𝗺𝗮𝗿𝗸𝗲𝘁𝗶𝗻𝗴. ⚡ 𝗖𝘂𝘁𝘁𝗶𝗻𝗴-𝗘𝗱𝗴𝗲 𝗦𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀: Leverage tools like 𝗟𝗮𝗻𝗴𝗖𝗵𝗮𝗶𝗻, 𝗟𝗟𝗠𝘀, 𝗥𝗔𝗚, 𝗻𝟴𝗻, 𝗠𝗮𝗸𝗲.𝗰𝗼𝗺, and 𝗦𝘁𝗮𝗯𝗹𝗲 𝗗𝗶𝗳𝗳𝘂𝘀𝗶𝗼𝗻 for marketing, sales, and operations. ⚡ 𝗧𝗲𝗰𝗵 + 𝗕𝘂𝘀𝗶𝗻𝗲𝘀𝘀 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲: 5+ years in Python, ML frameworks (𝗧𝗲𝗻𝘀𝗼𝗿𝗙𝗹𝗼𝘄, 𝗣𝘆𝗧𝗼𝗿𝗰𝗵), cloud (𝗔𝗪𝗦/𝗚𝗖𝗣), and 𝗱𝗮𝘁𝗮 𝗽𝗿𝗶𝘃𝗮𝗰𝘆. 💻 𝐓𝐨𝐨𝐥𝐬 & 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬: Python, FastAPI, Flask, Docker, AWS, GCP, Scrapy, Selenium, OpenAI API, CrewAI, LangChain, RAG, Pinecone, Vector DBs, Stripe, GraphQL ✅ 𝗦𝗸𝗶𝗹𝗹𝘀: GPT-4, RAG, n8n, Cloud, Data Science, NLP, Computer Vision 🌟 𝐑𝐞𝐜𝐞𝐧𝐭 𝐒𝐮𝐜𝐜𝐞𝐬𝐬 𝐒𝐭𝐨𝐫𝐢𝐞𝐬: 🔄 𝗠𝗮𝗿𝗸𝗲𝘁𝗶𝗻𝗴 𝗔𝗴𝗲𝗻𝘁: Scraped profiles/posts, built branding strategies, and executed campaigns via Llama Index. 🔄 𝗥𝗲𝗮𝗹 𝗘𝘀𝘁𝗮𝘁𝗲 𝗕𝗼𝘁: Integrated ATTOM API for property data, mortgage analysis, and owner info. 🔄 𝗙𝗶𝗻𝗮𝗻𝗰𝗶𝗮𝗹 𝗣𝗼𝗿𝘁𝗳𝗼𝗹𝗶𝗼 𝗠𝗮𝗻𝗮𝗴𝗲𝗿: 5 AI agents analyzing NYSE data, legal compliance, and investment strategies. 📩 𝗠𝗲𝘀𝘀𝗮𝗴𝗲 𝗺𝗲 to discuss your project – let’s turn your vision into reality! 📅 Let’s chat about your project goals—I'm available 7 days a week and usually reply within 30 minutes | 𝗥𝗲𝗮𝗱𝘆 𝘁𝗼 𝘀𝘁𝗮𝗿𝘁 𝗔𝗦𝗔𝗣. 🎯 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐂𝐡𝐨𝐨𝐬𝐞 𝐌𝐞: ✨ 20+ successful projects | $1K+ earnings | reviews ✨ Client-Centric Approach ✨ Strong communicator with business + tech expertise ✨ Up-to-date with GPT-4, LLaMA, Autogen, and more 🌐 𝐖𝐡𝐚𝐭 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐀𝐫𝐞 𝐒𝐚𝐲𝐢𝐧𝐠 💪 "𝘐 𝘩𝘢𝘥 𝘢𝘯 𝘢𝘮𝘢𝘻𝘪𝘯𝘨 𝘦𝘹𝘱𝘦𝘳𝘪𝘦𝘯𝘤𝘦 𝘸𝘪𝘵𝘩 𝘈𝘨𝘶𝘯𝘨. 𝘐 𝘸𝘢𝘴 𝘦𝘹𝘤𝘪𝘵𝘦𝘥 𝘸𝘩𝘦𝘯 𝘩𝘦 𝘧𝘪𝘯𝘪𝘴𝘩𝘦𝘥 𝘵𝘩𝘦 𝘱𝘳𝘰𝘫𝘦𝘤𝘵𝘴 𝘧𝘰𝘳 𝘮𝘦 𝘸𝘪𝘵𝘩𝘪𝘯 𝘵𝘩𝘦 𝘵𝘪𝘨𝘩𝘵 𝘥𝘦𝘢𝘥𝘭𝘪𝘯𝘦 𝘐 𝘩𝘢𝘥 𝘳𝘦𝘲𝘶𝘦𝘴𝘵𝘦𝘥. 𝘏𝘦 𝘥𝘪𝘥 𝘢 𝘨𝘰𝘰𝘥 𝘫𝘰𝘣, 𝘵𝘩𝘦𝘯 𝘸𝘰𝘳𝘬𝘦𝘥 𝘰𝘯 𝘶𝘱𝘥𝘢𝘵𝘦𝘴 𝘶𝘯𝘵𝘪𝘭 𝘸𝘦 𝘸𝘦𝘳𝘦 𝘴𝘢𝘵𝘪𝘴𝘧𝘪𝘦𝘥. 𝘏𝘪𝘴 𝘪𝘥𝘦𝘢 𝘢𝘯𝘥 𝘢𝘥𝘷𝘪𝘤𝘦 𝘸𝘢𝘴 𝘱𝘩𝘦𝘯𝘰𝘮𝘦𝘯𝘢𝘭. 𝘞𝘪𝘭𝘭 𝘥𝘦𝘧𝘪𝘯𝘪𝘵𝘦𝘭𝘺 𝘩𝘪𝘳𝘦 𝘩𝘪𝘮 𝘢𝘨𝘢𝘪𝘯." - 𝗖𝗵𝗿𝗶𝘀 𝗖𝗵𝗿𝗶𝘀𝘁𝗼𝗽𝗵𝗲𝗿𝘀𝗲𝗻 (Manager, US) 💪 "𝘈𝘨𝘶𝘯𝘨 𝘪𝘴 𝘢 𝘨𝘰𝘰𝘥 𝘥𝘦𝘷𝘦𝘭𝘰𝘱𝘦𝘳 𝘢𝘯𝘥 𝘐 𝘦𝘯𝘫𝘰𝘺𝘦𝘥 𝘸𝘰𝘳𝘬𝘪𝘯𝘨 𝘸𝘪𝘵𝘩 𝘩𝘪𝘮. 𝘈𝘨𝘶𝘯𝘨'𝘴 𝘤𝘰𝘮𝘮𝘶𝘯𝘪𝘤𝘢𝘵𝘪𝘰𝘯 𝘢𝘯𝘥 𝘳𝘦𝘴𝘱𝘰𝘯𝘴𝘪𝘷𝘦𝘯𝘦𝘴𝘴 𝘸𝘦𝘳𝘦 𝘷𝘦𝘳𝘺 𝘨𝘰𝘰𝘥 𝘢𝘯𝘥 𝘩𝘪𝘴 𝘴𝘬𝘪𝘭𝘭𝘴 𝘸𝘦𝘳𝘦 𝘴𝘵𝘳𝘰𝘯𝘨. 𝘢𝘯𝘥 𝘐𝘯 𝘢𝘯𝘺 𝘤𝘢𝘴𝘦 𝘵𝘩𝘦 𝘸𝘰𝘳𝘬 𝘸𝘢𝘴 𝘝𝘦𝘳𝘺 𝘴𝘢𝘵𝘪𝘴𝘧𝘢𝘤𝘵𝘰𝘳𝘺, 𝘩𝘦 𝘸𝘢𝘴 𝘷𝘦𝘳𝘺 𝘧𝘰𝘳𝘵𝘩𝘤𝘰𝘮𝘪𝘯𝘨 𝘢𝘯𝘥 𝘸𝘦 𝘸𝘰𝘳𝘬𝘦𝘥 𝘸𝘦𝘭𝘭 𝘢𝘴 𝘢 𝘵𝘦𝘢𝘮 . 𝘐 𝘦𝘯𝘫𝘰𝘺𝘦𝘥 𝘸𝘰𝘳𝘬𝘪𝘯𝘨 𝘸𝘪𝘵𝘩 𝘈𝘨𝘶𝘯𝘨 𝘢𝘯𝘥 𝘸𝘪𝘭𝘭 𝘭𝘪𝘬𝘦𝘭𝘺 𝘩𝘢𝘷𝘦 𝘢𝘥𝘥𝘪𝘵𝘪𝘰𝘯𝘢𝘭 𝘫𝘰𝘣𝘴 𝘧𝘰𝘳 𝘩𝘪𝘮 𝘪𝘯 𝘵𝘩𝘦 𝘧𝘶𝘵𝘶𝘳𝘦." - 𝗕𝗲𝗻 𝗖𝗿𝗮𝗻𝘄𝗲𝗹𝗹 (Client Relationship Manager, UK) 🎯 RESULT-BASED PAYMENT – ONLY PAY FOR WHAT YOU GET 💰 We are the ✨ first freelancers ✨ to introduce a 💡 Result-Based Payment system! That means: 🔹 No results? No full payment. 🔹 Only pay for what’s delivered. 🔹 Extra results = BONUS for YOU 🎁

Having 10 years of experience of commercial and enterprise application development mainly Java Spring applications with technology stacks such as: - Java Spring (Boot) framework - Hibernate ORM - Relational database (SQL Server, MySQL/MariaDB) - AWS or GCP Involved and developed various type of project and application such as: - IoT application - Desktop Point Of Sales - Mobile (Android) application - Company Project Calculation System - Database content migration and processing tool - Mobile Point Of Sales - Back End / Web Service / API & Web Scraping

I am a Senior Java Developer with experience since 2005. I have developed various Java projects in many industries. I'm also good with testing and quality assurance. Since 2012 I have worked with clients from Australia, Singapore, USA, Netherlands, Germany, Hongkong, and Greece. DETAILS: ✓Language: Java ✓Framework: Spring Framework (Spring Boot, Spring MVC, Spring-Security, Spring-WS, etc), Quarkus, Eclipse Vert.x, Play Framework, JHipster ✓Technologies & libraries: Hibernate/JPA, Web-Services (JAX-WS / SOAP, JAX-RS / REST, XML-RPC), Apache CXF, Jersey, SMPP, Apache Mina, Google Maps API (JS & Android), JSOUP, Mondrian/OLAP/OLAP4J, Apache Camel, Microservice Architecture, CloudSim, JWT (JSON Web Token), Apache Kafka ✓ Application Server: Tomcat, Jetty, Wildfly ✓ IDE: IntelliJ IDEA, Eclipse, Netbeans ✓ Database: MySQL, Oracle, PostgreSQL, MS SQL Server ✓ NoSQL DB: MongoDB ✓ Cache / In-memory software: Redis, Infinispan ✓ Payment processor: Braintree, Stripe, TokenEx (SecureNet, Payeezy, Worldpay US, Vantiv, MercuryPay) ✓ Front End: JSP, Thymeleaf, Velocity, HTML, CSS, JQuery, Bootstrap, AngularJS (1.x), Angular 2+, Highcharts, Ajax, JSON ✓ Build Tools: Maven, Gradle, Ant, SBT ✓ Mobile Notification: Google Cloud Messaging (GCM), Firebase Cloud Messaging (FCM), Apple ✓ Push Notification service (APNs) ✓ Test and code quality framework: JUnit, TestNG, SonarQube ✓ Reporting Tools: JasperReports ✓ Continuous Integration: Jenkins ✓ Collaboration Tools: JIRA, Asana, Pivotal Tracker, GitHub, Bitbucket, Slack ✓ Social Media / OAuth Integration: Facebook, Google ✓ Identity Management: Keycloak ✓ Authorization and authentication: Oauth2, OpenID, JWT ✓ Specification Documentation: Swagger / OpenAPI ✓ Containerization: Docker ✓ OS: Linux, Windows What I'm good for: ✓ Software/Back-End development ✓ Software design/architecture/solution ✓ Web application development ✓ System/business analyst ✓ Database design/architecture ✓ Software testing and quality assurance I'm available to hire up to 30 hours/week. I am looking forward to working with you! Thanks!