Hire the Best Apache Jakarta POI Developers

Hello! I have experienced in Telecommunication Industry for around 15 years now. Been working in IT as a Tester has been around 9 years, with skill variety as Test Engineer until Test Lead. For the past 3 years, i have closely exposed to Agile Methodologies, L1 and L2 Operations Support, as well as a Tester. I like to read novels, and hopefully i can find a freelance job as a translator from English to Bahasa Indonesia. Cheers.

🎯 Liferay DXP 7.4 Certified Professional Back-End Developer ⌛ 10 Years on Liferay Platform 🏆 100% Job Completion | Top Rated on Upwork | 7500+ Hours on Upwork I have 10 years of expertise in Software Development, Solution Architecture, and Product Design, with a strong focus on Liferay and Spring technology. 💼 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐒𝐤𝐢𝐥𝐥 : 𝐂𝐨𝐫𝐞 : Java, J2EE, Liferay(6.X/7.X), Spring Boot, JSF, PrimeFaces,Icefaces, Richfaces, FHIR, ABDM, SNOMED-CT,REST, SOAP web services 𝐅𝐫𝐨𝐧𝐭-𝐄𝐧𝐝 : AngularJS, ReactJS, HTML4/5, XHTML, XML, CSS3, jQuery, JavaScript, AJAX 𝐒𝐞𝐫𝐯𝐞𝐫𝐬 : Tomcat, JBoss/Wildfly and Jetty, GlassFish 𝐒𝐞𝐜𝐮𝐫𝐢𝐭𝐲 : Spring Security, OAuth2, JWT 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 : SQL, MySQL, PostgreSQL, MongoDB and Oracle 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬 : Gmail, Google Meet, Google Calendar, Zoom, RazorPay, Stripe, SMTP, Twilio, DocuSign, Google Maps API, PayPal 𝐇𝐞𝐚𝐥𝐭𝐡𝐂𝐚𝐫𝐞 𝐒𝐭𝐚𝐧𝐝𝐚𝐫𝐝 : FHIR | EHR | EMR | SNOMED | HL7 | OpenEHR | OpenEMR | ABDM 𝐒𝐞𝐚𝐫𝐜𝐡-𝐄𝐧𝐠𝐢𝐧𝐞𝐬 : Apache Solr, Elastic Search 𝐂𝐥𝐨𝐮𝐝 𝐚𝐧𝐝 𝐃𝐞𝐯𝐨𝐩𝐬 : AWS, Google Cloud, Azure, Jenkins, CICD, Docker, Kubernetes 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 : JTest, JUnit, Mockito and Powermock 𝐂𝐨𝐝𝐞 𝐐𝐮𝐚𝐥𝐢𝐭𝐲 𝐓𝐨𝐨𝐥𝐬 : Crucible and Sonarqube 𝐁𝐮𝐢𝐥𝐝 𝐭𝐨𝐨𝐥𝐬 : Maven, Gradle, Ant, npm, grunt and webpack 𝐕𝐂𝐒 : SVN, GIT, GITLAB, Bitbucket 𝐎𝐒 : Linux, Windows and Mac OS 𝐁𝐮𝐠/𝐈𝐬𝐬𝐮𝐞 𝐭𝐫𝐚𝐜𝐤𝐞𝐫𝐬 : Jira, asana, Trello 🔐𝐋𝐢𝐟𝐞𝐫𝐚𝐲 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 : ➜ Expert in almost all OOTB features [ Sites, Pages, Webcontents, Fragments, Layouts, Asset Publishers, Categories, Tags, Search, Workflows, User Management, Roles, Permission, User Groups ] ➜ Implemented Custom Portlets [ using MVC, React, Spring, JSF, service builder and standards like OSGI, JSR 168 and 268 ] ➜ Implemented REST API using Liferay Rest builder ➜ Implemented themes [ using Freemarker, velocity ], ➜ Customized Liferay [ using Service wrapper, Portlet filter, Lifecycle events, Model listeners, Search contributors, JSP, Core Classes ] ➜ Implemented Web Fragment [ Freemarker, HTML, CSS, Javascript ] ➜ Implemented SSO Integration supports SAML, Keycloak, LDAP, OpenId, OAuth, and more ➜ Implemented SMS and WhatsApp Integration using Twilio ➜ Implemented Third-Party integration using REST API or client SDK ➜ I have recently upgraded Liferay 7.0 to Liferay 7.4 including data and code migration both. Looking forward to working with you to develop and deliver a fantastic product and Solutions as per your Business Requirements.

I bridge the gap between enterprise-grade backend architecture and cutting-edge AI capabilities. With over 10 years of experience engineering scalable, mission-critical systems across fintech, e-commerce, and education domains, I specialize in building secure microservices and integrating advanced AI features—including production-ready RAG (Retrieval-Augmented Generation) pipelines and MCP (Model Context Protocol) implementations. Whether you need to optimize a high-throughput event-driven system or connect your enterprise data securely to Large Language Models (LLMs), I deliver clean, production-ready code optimized for performance and scale. My expertise includes: 🤖 AI & LLM Integration: Retrieval-Augmented Generation (RAG), Model Context Protocol (MCP), Vector Databases, LLM Orchestration & Context Window Optimization. ☕ Languages & Frameworks: Java (8+), Kotlin, Spring Boot, Quarkus, JPA (Hibernate, EclipseLink), JAX-RS, GraphQL, gRPC. 🌐 Frontend & UI: Angular 12+, HTML5, CSS3, SCSS, JavaScript, TypeScript (building responsive, data-driven user interfaces). ☁️ Cloud & DevOps: AWS (EC2, S3, SQS, RDS, Glue, Athena), Docker, Kubernetes, CI/CD (GitHub Actions, GitLab CI/CD). ⚡ Architecture & Messaging: Microservices, Event-Driven Architecture (Kafka, RabbitMQ, ActiveMQ, AWS SQS). 🗄️ Databases & Search: PostgreSQL, MySQL, Oracle, MongoDB, Elasticsearch, Cassandra. 🛠️ Tools & Testing: Git, JIRA, Slack, JUnit, Mockito, Redis, ETL, Cube.js.

As a 𝐒𝐞𝐧𝐢𝐨𝐫 𝐉𝐚𝐯𝐚 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 & Enterprise Solutions Architect with over 𝟏𝟓+ years of experience, I specialize in designing and building scalable, secure, and high-performance 𝐛𝐚𝐜𝐤𝐞𝐧𝐝 𝐬𝐲𝐬𝐭𝐞𝐦𝐬 for complex domains. I’ve successfully modernized monolithic legacy systems into modular, microservice-based architectures, developed enterprise-grade APIs, and delivered Java-powered backend platforms that improve reliability, performance, and business outcomes. 𝐊𝐞𝐲 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 🔧𝐁𝐚𝐜𝐤-𝐄𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: Proficient in Java (J2SE, J2EE, J2ME), Spring Boot, Hibernate, and JPA, building clean and modular backends with REST APIs and microservice-based architectures. 🌐 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 (𝗠𝗘𝗥𝗡 & 𝗠𝗼𝗱𝗲𝗿𝗻 𝗪𝗲𝗯) Experienced in developing full-stack applications using MongoDB, Express.js, React.js, and Node.js. Capable of building responsive UIs, integrating APIs, and delivering complete end-to-end web solutions. 🔗𝐄𝐧𝐭𝐞𝐫𝐩𝐫𝐢𝐬𝐞 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧: Proficient in integrating Oracle BRM, Salesforce, Microsoft Dynamics, and OSS/BSS systems to build scalable enterprise ecosystems. Act as a Subject Matter Expert (SME) in business object mapping, aligning CRM structures with real-world business domains. Experienced in driving automation through RPA for streamlined operations. 🚀𝐃𝐞𝐯𝐎𝐩𝐬 & 𝐂𝐈/𝐂𝐃: Skilled in setting up CI/CD pipelines using Git, Bitbucket, Bamboo, Jenkins, and Docker to streamline deployments and improve delivery efficiency. 🔐𝐒𝐞𝐜𝐮𝐫𝐢𝐭𝐲 & 𝐒𝐒𝐎: Experience implementing secure authentication mechanisms using OAuth2, JWT, and enterprise-grade Single Sign-On (SSO) across distributed systems. 🖥️𝐒𝐞𝐫𝐯𝐞𝐫𝐬: Worked extensively with Apache Tomcat, JBoss (4,5, 7), WildFly (4, 7, 13), Glassfish server v3, BES, VMWare 17, Apache tomcat, Jettyserver and JSF with RichFaces for UI-driven enterprise solutions. 🖥️ 𝐎𝐩𝐞𝐫𝐚𝐭𝐢𝐧𝐠 𝐒𝐲𝐬𝐭𝐞𝐦𝐬: Microsoft Windows XP, Windows 7, window 10, Red Hat Enterprise 4.0, Knoppix 5.1, BackTrack 4, Linux, Ubuntu 22 LTS 🛠️ 𝐓𝐨𝐨𝐥𝐬: Bitbucket, Git, Vs code Jira, pipline, hipchat and Confluence, Scrum/Agile development methodologies, Netbeans 6.1 & 6.9 and Eclipse IDE, Metlab, MS-Visual Studio, MS Office 2007, Ms Visio, Jasper reports 🗃️𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 & 𝐒𝐲𝐬𝐭𝐞𝐦𝐬: Oracle 9i, 13g, 14g, SQL Server 5.0 2017, PostgreSQL 7, MySQL 8, MS Access, Oracle BRM, EBSData (Financial Reporting) Holistics, MySQL Workbench 5.0 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐂𝐡𝐨𝐨𝐬𝐞 𝐌𝐞: 🔹 Strategic Alignment: I design solutions that align with business goals, not just technical requirements. 🔹 Proven Track Record of Excellence: Experience working across domains like telecom, fintech, healthcare, and SaaS systems. 🔹 Architectural Precision: Focus on building future-proof, maintainable, and high-performance systems. 🔹 Executive-Level Communication: I maintain transparent, articulate, and timely communication throughout the project lifecycle. 🔹 Operational Excellence: My solutions are engineered for performance, resilience, and sustainability, enabling businesses to scale with confidence and efficiency. 📚 𝐁𝐨𝐨𝐤𝐬 & 𝐏𝐮𝐛𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 Voice Vox: Published by Lambert Academic Publishing (ISBN: 978-3-659-30294-7) Mobile Call Establishment using SIP Without GSM Charges is a technical guide on implementing a complete VoIP client using SIP and Asterisk PBX, this book explores how to build telecom applications across all OSI layers, including SIP, RTP, SDP, UDP, and more , empowering developers to create cost-efficient, real-time voice communication systems. 🤝 𝐋𝐞𝐭'𝐬 𝐂𝐨𝐥𝐥𝐚𝐛𝐨𝐫𝐚𝐭𝐞: If you're looking for a results-driven Java Developer who understands enterprise systems and builds scalable, secure, and modern backend platforms, let's connect and bring your vision to life.