With over 14 years of experience in software engineering, I specialize in designing and delivering robust back-end and full-stack solutions for the fintech, banking, and process mining sectors. I bridge the gap between complex business requirements and highly scalable, cloud-native architecture. Whether you need to migrate legacy systems to microservices, ensure strict financial compliance, or build full-stack platforms from the ground up, I bring the technical depth and leadership required to get it done right the first time. My Core Technical Expertise: Backend & Architecture: Java/J2EE, Spring Boot, Microservices, Spring Security, REST API, Open API, and JPA. (EJB Certified). Cloud & Containerization: AWS Certified (SAA, DVA, CloudOps), Docker, and Kubernetes. AI & Next-Gen Tooling: OpenAI, Spring AI, and MCP (Model Context Protocol). Frontend Integration: ReactJs, ZK UI. Databases & Observability: Oracle, MySQL, Grafana, and Prometheus. Domain Expertise: Process Mining, Core Banking, and Financial integrations. Why Partner With Me? Enterprise-Scale Impact: I have spearheaded mission-critical banking automation for over 1,700 bank branches and modernized massive monolithic systems into scalable microservices. Engineering Leadership: Deep experience in Agile/Scrum environments. I regularly lead teams to deliver complex projects on tight deadlines while maintaining strict code quality. Proven Remote Reliability: I have a decade of experience driving complex projects to completion while collaborating seamlessly with globally distributed teams across Australia, Europe, and South America.

✅ 8+ Years of Java Development Experience ⚡ Full-Cycle Backend Development & Architecture ⚡ AI-Powered Development for Faster Delivery & Better Code Quality 👀 Click Invite or Hire for Scalable Java Backend Solutions Looking for a Java Developer who can build scalable backend systems, SaaS platforms, enterprise applications, and cloud-native solutions designed for long-term growth? For 8+ years, I have helped startups, SaaS companies, fintech businesses, AdTech platforms, and enterprise organizations build secure, scalable, and high-performance software using Java, Spring Boot, PostgreSQL, MySQL, Kafka, GraphQL, AWS, Docker, Kubernetes, and modern cloud technologies. From backend architecture and microservices development to legacy application modernization, API integrations, troubleshooting, cloud deployments, and AI-assisted engineering, I deliver production-ready solutions built to scale. 👉 WHAT YOU GET: ✔️ Java Backend Development & Software Architecture ✔️ Spring Boot Applications & Microservices ✔️ REST APIs, GraphQL APIs & Integrations ✔️ Cloud-Native Applications using AWS ✔️ AI-Assisted Development & Automation ✔️ Legacy System Modernization ✔️ Long-Term Support, Maintenance & Optimization 🏆 KEY ACHIEVEMENTS: ✔️ 8+ years building Java, Spring Boot, and enterprise backend applications ✔️ Built scalable SaaS platforms, fintech applications, AdTech systems, and enterprise software ✔️ Maintained and enhanced 15+ production microservices ✔️ Contributed to Adstrome, TrustArc, Acquia DAM, and Digi-Docket ✔️ Designed secure APIs, event-driven systems, and scalable architectures ✔️ Improved application performance through optimization and modernization ⚙️ CORE EXPERTISE: ✔️ Java, Core Java, Java EE, Spring Boot, Spring MVC, Spring Security ✔️ Hibernate, JPA, JDBC, MyBatis, ORM Frameworks, REST APIs, GraphQL APIs ✔️ Microservices Architecture, Apache Kafka, Event-Driven Systems ✔️ PostgreSQL, MySQL, Snowflake, Query Optimization ✔️ AWS, Docker, Kubernetes, Jenkins, Maven, Gradle, Git, GitHub, Bitbucket, Version Control Systems ✔️ Authentication, Authorization, RBAC, Multi-Tenant SaaS ✔️ ZK Framework & Enterprise Web Application Development 🛠 DEVELOPMENT & MAINTENANCE: ✔️ Web Application Development & Enterprise Software Development ✔️ Spring MVC & ZK Framework Application Development ✔️ Legacy Application Maintenance, Modernization & Application Upgrades ✔️ Feature Development & Application Enhancements ✔️ Bug Fixing, Root Cause Analysis & Production Support ✔️ Performance Bottleneck Analysis & Optimization ✔️ Memory Leak Detection & Resolution ✔️ Security Vulnerability & CVE Remediation ✔️ Third-Party API Integration & Business Workflow Automation ✔️ Performance Optimization & Scalability Improvements ☁️ CLOUD & DEVOPS: ✔️ AWS Cloud Services, Docker Containerization & Containerized Application Deployment ✔️ Kubernetes Container Orchestration for Scalable Cloud Infrastructure ✔️ Linux-Based Server Systems, Linux Server Administration & Linux Server Troubleshooting ✔️ Apache Tomcat Installation, Deployment, Monitoring & Performance Tuning ✔️ CI/CD Pipelines, Jenkins Automation, Git, GitHub, Bitbucket & Version Control Systems ✔️ Web Application Troubleshooting, Production Environment Support & Incident Resolution 🧪 TESTING & QUALITY: ✔️ JUnit, Mockito, Unit Testing & Integration Testing ✔️ Test-Driven Development & Automated Testing ✔️ API Testing, Debugging & Log Analysis ✔️ Root Cause Investigation & Production Stability ✔️ Code Quality Improvements & Maintainable Software Development ✔️ Regression Testing & Application Reliability Improvements 🤖 AI-ENHANCED ENGINEERING: ✔️ AI-Assisted Development & AI-Powered Coding Workflows ✔️ OpenAI API Integration, LLM Workflows & AI Automation ✔️ AI-Assisted Testing, Refactoring & Documentation ✔️ Faster Delivery Through AI-Enhanced Engineering 🏢 INDUSTRY EXPERIENCE: ✔️ SaaS Platforms & Enterprise Applications ✔️ AdTech & Programmatic Advertising ✔️ Fintech & Loan Processing ✔️ Privacy & Compliance Systems ✔️ Digital Asset Management ✔️ Multi-Tenant & White-Label Solutions 🚀 WHY CLIENTS CHOOSE ME: ✔️ 8+ Years of Java Development Experience ✔️ Enterprise SaaS & Microservices Expertise ✔️ Strong Spring Boot & Cloud-Native Skills ✔️ Scalable, Secure & Maintainable Solutions Whether you need to build a backend platform from scratch, scale an existing SaaS application, maintain a legacy system, resolve performance bottlenecks, remediate security vulnerabilities, implement microservices, modernize enterprise software, deploy applications on Tomcat or Linux-based server systems, integrate AI capabilities, or optimize application performance, I can help. Looking for a Java Developer, Senior Java Developer, Java Backend Developer, Spring Boot Developer, Java Architect, Backend Engineer, Enterprise Software Developer, API Developer, GraphQL Developer, AWS Developer, Cloud Engineer, Kafka Developer, Software Architect, Backend Architect, or Java Consultant?

Over the last 10+ years, I have developed a wide range of Enterprise Web Applications using Java. My Skills include : ✅ Java, JavaEE, EJB, JSP, Servlet, Hibernate, JPA, Android ✅ Frameworks: Grails with Groovy, Spring MVC, JSF, Struts, GAE, ZK, Android SDK ✅ Cloud services : AWS (EC2, RDS, Elastic Beanstalk, S3), Google Services ✅ Databases: MySql, MSSQL, Oracle ✅ Reporting Tools: iText, Apache POI, JasperReport, Aspose, Highcharts ✅ JAX-RS, REST API, Web Service, XML, JSON, Amazon S3/EC2 Services ✅ Web Security (XSS Attack, SQL Injection, XSRF Attack, Server Security) ✅ Social Integration : Facebook, Twitter, YouTube, Google+ Integration ✅ Payment Gateway : Payeezy(FirstData), Stripe, Twillo ✅ Frontend Tools: HTML, JavaScirpt, jQuery, Ajax, CSS, Bootstrap ✅ VCS: GIT, SVN ✅ Build Tools: Maven, Ant, Gradle ✅ Server: Tomcat, NGINX, JBoss (WildFly) ✅ IDE: Eclipse, Intellij, NetBeans, Android Studio ✅ Unit Test: JUnit, Mockito ✅ Automation: Selenium web driver I believe in quality along with deadline of the project.

15+ years of Java development means I’ve worked far beyond writing backend code, from designing application architecture and building Spring Boot services to modernizing legacy systems, developing APIs, optimizing databases, and solving production-level challenges. I help businesses turn complex backend requirements into secure, scalable, maintainable, and production-ready software. My experience spans SaaS, FinTech, Banking, Healthcare, Agriculture, ERP, CRM, AdTech, Digital Asset Management, Identity Verification, Workflow Automation, Document Management, and enterprise software. 𝗝𝗔𝗩𝗔 & 𝗕𝗔𝗖𝗞𝗘𝗡𝗗 𝗘𝗫𝗣𝗘𝗥𝗧𝗜𝗦𝗘 Java, Core Java, Java SE, Java EE, Spring Boot, Spring Framework, Spring MVC, Spring Security, Hibernate, JPA, JDBC, MyBatis, Spring Batch, Maven, Gradle, Apache Tomcat, Java Servlet API, ZK Framework, REST APIs, GraphQL, SOAP, Microservices, Distributed Systems, Event-Driven Architecture, Enterprise Java, Backend Development, Web Application Development and Cloud-Native Development. 𝗪𝗛𝗔𝗧 𝗜 𝗕𝗨𝗜𝗟𝗗 ✔️ Java & Spring Boot backend applications ✔️ Microservices and scalable backend architecture ✔️ REST API, GraphQL API and SOAP web services ✔️ Java web applications using ZK Framework ✔️ SaaS, ERP, CRM and workflow automation platforms ✔️ Authentication, Authorization, OAuth, OIDC, JWT and RBAC ✔️ Third-party API and payment gateway integrations 𝗔𝗣𝗜𝗦, 𝗗𝗔𝗧𝗔𝗕𝗔𝗦𝗘𝗦 & 𝗦𝗘𝗖𝗨𝗥𝗜𝗧𝗬 REST API Development, GraphQL, SOAP Web Services, API Integration, OpenAPI, Swagger, OAuth 2.0, OIDC, JWT, RBAC, API Security, PostgreSQL, MySQL, Oracle Database, SQL Server, MongoDB, Redis, Database Design, Query Optimization, Performance Tuning, Hibernate/JPA and Transaction Management. 𝗠𝗜𝗖𝗥𝗢𝗦𝗘𝗥𝗩𝗜𝗖𝗘𝗦 & 𝗖𝗟𝗢𝗨𝗗 Spring Boot Microservices, Microservices Architecture, Distributed Systems, Apache Kafka, Redis, AWS, Azure, Google Cloud Platform, AWS EC2, RDS, S3, Lambda, Docker, Kubernetes, Jenkins, Git, GitHub, CI/CD, Cloud Deployment, Containerization, Kubernetes Orchestration and Linux-based Server Systems. 𝗟𝗘𝗚𝗔𝗖𝗬 𝗠𝗢𝗗𝗘𝗥𝗡𝗜𝗭𝗔𝗧𝗜𝗢𝗡 & 𝗦𝗨𝗣𝗣𝗢𝗥𝗧 ✔️ Legacy Java Application Maintenance ✔️ Legacy System Modernization ✔️ SOAP to REST Migration ✔️ Java Version & Framework Upgrades ✔️ Monolith to Microservices Migration ✔️ Code Refactoring & Technical Debt Reduction ✔️ Bug Fixing & Root Cause Analysis ✔️ Linux Server & Web Application Troubleshooting ✔️ Database & Performance Optimization 𝗥𝗘𝗔𝗟-𝗪𝗢𝗥𝗟𝗗 𝗣𝗥𝗢𝗝𝗘𝗖𝗧 𝗘𝗫𝗣𝗘𝗥𝗜𝗘𝗡𝗖𝗘 Worked on Digital Asset Management platforms with 15+ microservices, FinTech loan processing and digital lending systems, privacy and compliance platforms, Farm Management ERP, banking workflow automation, identity verification and document intelligence, multi-tenant SaaS and booking platforms, CRM systems, document management and enterprise workflow applications. My responsibilities have included backend architecture, Java development, Spring Boot development, ZK-based web application development, API development, database design, integrations, authentication, authorization, cloud deployment, modernization, performance optimization and production support. 𝗔𝗜-𝗔𝗦𝗦𝗜𝗦𝗧𝗘𝗗 𝗘𝗡𝗚𝗜𝗡𝗘𝗘𝗥𝗜𝗡𝗚 I use Cursor, Claude Code, ChatGPT, GitHub Copilot, Gemini and Windsurf for AI-assisted coding, code generation, debugging, refactoring, testing, documentation, code reviews and development automation. AI/LLM experience includes OpenAI API integration, AI-powered document intelligence, RAG workflows, LLM integrations, AI-generated code validation, AI-assisted modernization and intelligent application development. 𝗧𝗘𝗦𝗧𝗜𝗡𝗚 & 𝗤𝗨𝗔𝗟𝗜𝗧𝗬 JUnit, Mockito, Unit Testing, Integration Testing, API Testing, Debugging, Log Analysis, Code Reviews, Performance Testing, Root Cause Analysis, Secure Coding, Application Monitoring and Production Troubleshooting. 𝗪𝗛𝗬 𝗖𝗟𝗜𝗘𝗡𝗧𝗦 𝗪𝗢𝗥𝗞 𝗪𝗜𝗧𝗛 𝗠𝗘 ✔️ 15+ years of hands-on Java backend development ✔️ Strong Spring Boot, Microservices and Software Architecture expertise ✔️ Enterprise backend, SaaS and production system experience ✔️ Java web application development with ZK Framework ✔️ AI-enhanced development and modernization workflows Looking for a Senior Java Developer, Java Backend Developer, Spring Boot Developer, Microservices Developer, Java Architect, Backend Engineer, Enterprise Java Developer, REST API Developer, GraphQL Developer, AWS Java Developer, Cloud Engineer, Software Architect, Backend Architect, Java Consultant, ZK Developer, or Enterprise Application Developer? Whether you need Java backend development, Spring Boot Microservices, REST API development, ZK web application development, legacy modernization, database optimization, cloud deployment, API integration, production troubleshooting, or SaaS backend development, I can help. Click Hire or Invite me to your job post and let's discuss your project.

🚀 Senior Back-End Engineer & Tech Leader (14+ yrs) — I help businesses build scalable, secure, and high-performance systems that handle millions of users and requests with ease. ✅ Delivered 50+ successful projects across healthcare, fintech, ed-tech, real estate, government, and non-profit sectors. ✅ Scaled apps from 1K → 1M+ daily requests and platforms from zero → 1M+ users. ✅ Trusted by global companies including Upwork (NASDAQ: UPWK), Letshego (Botswana Stock Exchange), OCO Global, and multiple startups worldwide. If you need a reliable partner who can architect solutions from scratch or optimize existing systems for performance, security, and scale — let’s talk. Do you like Upwork's Reports & Time tracking feature? I am one of those developers who built that :) ✅ How can I help you ✓ I can handle your all end-to-end requirements analysis, UX, development, testing & delivery so you can focus on your sales & operations ✓ I can extend/develop your MPV product to production-ready ✓ I can develop products from scratch until the final delivery and support with maintained code quality and proper code coverage ✓ I can maintain your currently live products in the most optimum way by keeping quality and customer experience at first place in mind and with the minimum team and can save your cost ✓ I can choose the right technology stack and tools for your solution based on real needs and can save costs ✓ I can manage the team, do code reviews, handle CI/CD and releases, support live systems ✓ I can understand and implement the most difficult parts of software systems at very large-scale platforms like Upwork, (I am one of the Upwork platform devs) ✅ Expert areas - Java based back-end frameworks like Spring Modules (Spring MVC, Spring Security, Spring AOP, Spring Rest, Spring Data/JPA) & ZK (Zkoss) - ECMS implementation with Alfresco Content Services 4.x, 5.x, 6.x and Alfresco Process Services (Activiti) - RDBMS (MySQL, PostgreSQL, Oracle) - Graph/Document Databases MongoDB and DynamoDB - Web Crawlers with all features - Microservices based architecture implementation with Spring boot, Spring Integration and Apache Camel - AWS experience with RDS, SQS, SNS, SES, S3, and EC2 Instances - AWS API implementation experience - Queue based implementations with ActiveMQ/SQS - Test driven development implementation with unit and integration test cases with Junit/TestNG + Mockito + Spring - Database integration frameworks like JDBC/Hibernate/Sprint Data (ORM) and Spring Mongo - REST based Web Service/API implementation with Spring REST - CI/CD implementation with (Bamboo + Jenkins + Maven + Nexus + GIT(Bitbucket/Gitlab/Github)) - Payment Gateways implementations like Paypal and Stripe with debit/credit card integration - Solr/Lucene/ElasticSearch search engine integration - Jasper Reports (with DynamicJasper as well) - Agile Methodology understanding all terminology - Experience with implementing very complex queries with MySQL db - Java based Servers Tomcat/JBoss - Repositories like Git, SVN, P4V(Perforce) ✅ What my clients says (You may check in Work History) ⭐⭐⭐⭐⭐ "Vishal is best developer I have worked with till date. He is prompt responsive, an incredible problem solver, very professional, highly skilled and great team leader. He handles our portal continuous development including all project phases starting from requirement gathering(calls), task creation with all details, estimation, development, deployment on all environments, testing, creating wiki pages, choose right technology stack and AWS resources and manage tickets! He is handling dev team and also do development himself and supports everyone. Will certainly work with him again when we restart the project development! Highly recommended developer." 👤 Hugo Galicia ( CEO @ chicagodealvault.com ) ⭐⭐⭐⭐⭐ "It was a highly positive experience working with Vishal. He was conscientious, always doing his due diligence to clarify any uncertainties before starting work. He gives accurate estimates of effort/time required for work, and either delivers on time or early. Overall a very reliable and dependable worker. We hope to work together with him soon. Highly recommended!" 👤 Dominik Bieringer ( CEO @ Kandu ) ⭐⭐⭐⭐⭐ "Very experienced and diligent contractor" 👤 Abhijit Dhar ( VP - Technical Services @ Whitehat Virtual Technologies ) ⭐⭐⭐⭐⭐ "Vishal is an excellent java engineer, with great business logic, self-motivated, with deep technical knowledge. He jumped right in and understood the current project architecture with minimum KT and limited documentation. He is always eager to solve new issues. I highly recommend him and will definitely work with him again, if opportunity permits. A pleasure to work with" 👤 Chris Adams ( CEO @ eDataSource )

🌟 Top Rated Plus & Expert-Vetted Freelancer on Upwork 🌟 I’m a seasoned Software Engineer with 12+ years of experience in building high-performance, enterprise-grade applications and cloud-native platforms. I specialize in developing scalable multi-tenant SaaS products, AI-powered automation tools, and secure, cloud-based backend systems. I have led the end-to-end development of enterprise SaaS platforms used globally, with a focus on microservices architecture, event-driven design, and robust multi-region tenant isolation. My experience also extends to integrating advanced AI workflows into production systems using cutting-edge tools like OpenAI and Google Vertex AI. I bring a results-driven mindset, strong problem-solving ability, and the ability to align technology with business goals. Whether you need to build from scratch, modernize an existing system, or integrate AI, I can help deliver value quickly and reliably. 💼 Core Expertise • SaaS Architecture: Multi-tenant design, tenant-aware microservices, RBAC, region-based deployments • AI Integrations: OpenAI (GPT), Google Vertex AI, LangChain, Pinecone, embeddings, vector search, LLM agents • Cloud & DevOps: AWS (Lambda, ECS, RDS, Cognito), GCP (Cloud Functions, Cloud Run, BigQuery), Docker, Kubernetes, Terraform • Backend Development: Java (Spring Boot), Python (FastAPI, Django), Node.js (Express, NestJS), PHP (Laravel) • Frontend Development: React, Angular, Vue.js, Tailwind CSS • CI/CD & Monitoring: GitHub Actions, Jenkins, AWS CodePipeline, Prometheus, Grafana, ELK, CloudWatch • Databases & Caching: PostgreSQL, MySQL, MongoDB, DynamoDB, Redis If you’re looking for a developer who can take ownership, move fast, and deliver production-ready results, let’s connect. I’m confident I can help you build reliable software that scales with your business.

I'm java expert over 15 years in many positions such as as programmer, freelancer, analyst, java team leader, product architect, project manager. I'm major on Document Output, Document Management System, Enterprise Content Management (ECM), Document Conversion fields, Digital Image processing. Besides that, i have lot of experiences and good skills in WDK (Windows driver kit) development, Alfresco ECM, Filenet ECM, Filenet BPM, Education, Transportation, Hotel Reservation, Human Resource, Business Process Management (BMP), Groupon, CRM (Customer Relationship Management). About technology stack, almost time, I have worked and researched in J2EE technology and Open Source Frameworks such as Cruise Control, Hudson, JBoss, Apache Tomcat, Apache server, Tomcat/ JBoss High available system (HA- clustering & load balancing between many web servers), BPM Activiti, Apache Axis, Apache Struts, Apache Ant, Apache Lucene, Java Server Faces, ZK (the very famous Ajax framework for Java), Vaadin, GWT, Selenium, JQuery, iText, PDFLib, JTOpen, Spring, Hibernate, JPA, Eclipse, MyEclipse. Several years go, i started working with LAMP stack. MongoDB, Php, Wordpress, WooCommerce, Yii are also my favorite language/framework. My favorite methodology to develop software product is Test Driven Development (TDD). Generally, I’m very eager to work with Java and Php. In addition to the practical experience, I achieved the Master degree in Computer Science field at the Natural Science University with “Optical Music Recognition” in July 2005.

Hi everyone! I am an Oracle Certified full-stack Java developer with huge experience writing secure code. I have been working on banking software for one of our local banks in Ukraine for more than 9 years. And it’s not a single experience I have, also I have worked on eCommerce projects, and participated in the development of hiring platforms, and tools for the CA Gen environment. My main goal is to create long-term relationships with my clients and build qualitative and reliable applications. I like to learn new technologies and move on with the latest trends in IT industry. I am an easy-talk-to person and think that communication is important in the development field. Feel free to message me, I will be glad to answer all your questions! These are my key skills: Backend: Java 6+, JavaEE, JavaSE Spring (Spring boot, Spring JPA, Spring data, Spring security and other Spring modules) Hibernate SQL DBs (MySQL, Oracle, PostgreSQL, SQLite) Non SQL DBs (Redis, Mongo) Elastic (full-text search and complicated full-text search) Amazon S3, AWS Thymeleaf Jasper Report jBOSS JBPM JUnit Frontend: ZK Ajax JSP, PrimeFaces HTML, XML Groovy Angular React Others JavaFX Git, SVN Docker SDK Eclipse/IntelliJ Idea Have a nice day!

💡 10+ Marketplace, iOS & Android App, SaaS, and Enterprise SaaS Engineering 👥 Coordinate as Freelancer, Teams, Large Teams, Firms Software Houses 💰 Launch on Google, App Stores, AI Domains, LLM Engineering, & Chatbot Development Top-Rated Full-Stack Engineer | 7+ Years of Experience • 100+ Apps Delivered: iOS, Android, AI/LLM, Web & Cross Platform. • Open for Opportunities: Available for invitations, contracts, and long term projects. • Target Clients: Startups, Enterprises & Tech Leaders. Technical Skills & Expertise • Flutter, Swift, Kotlin, Java. • React, Next.js, Node.js, Laravel. • MySQL, PostgreSQL, MongoDB, Firebase. • AWS, Docker, Kubernetes, GitHub. • REST APIs, GraphQL, WebSockets, CI/CD. • OpenAI, LLMs, LangChain, LlamaIndex. • RAG, AI Agents, AI Automation, MCP. • Vector Databases: Pinecone, Weaviate, ChromaDB. • Blockchain, Web3, Solidity, Smart Contracts, dApps. • Redis, Supabase, Elasticsearch, RabbitMQ. • Tailwind CSS, Bootstrap, HTML5, CSS3. • OAuth, JWT, Microservices, DevOps. • Agile/Scrum, Git, Express.js, FastAPI. • TensorFlow, PyTorch, Anthropic Claude API, Google Gemini API. Certifications ✦ Apple Certified. ✦ DeepLearning, AI Certified. ✦ JavaScript RAG Web Apps with LlamaIndex Certification. ✦ Certiport Certified. ✦ Google Cloud Certified. ✦ AWS Certified. ✦ Microsoft Certified: Azure AI Engineer Associate. ✦ Meta Front-End Developer Professional Certificate. ✦ IBM AI Engineering Professional Certificate. ✦ Oracle Certified Professional (Java). ✦ Scrum Alliance Certified ScrumMaster (CSM). ✦ Docker Certified Associate (DCA). Industries I Serve • AI & LLM Software, Web & Mobile Applications. • SaaS Platforms & Applications. Enterprise Software & Business Applications. Healthcare Software, Web & Mobile Applications. Finance, Banking & FinTech Applications. Ecommerce & Marketplace Applications. Logistics & Supply Chain Applications. • Manufacturing & Industrial Applications. • Real Estate & PropTech Applications. • Enterprise Applications. • Insurance Applications. • Telecommunications Applications. • Social Media Applications. • Video Streaming Applications. I am available for long-term positions, multiple projects, and ongoing collaborations. Send me an invitation with your project details, and I can start working immediately. #MobileAppDeveloper #LLMDevelopment #Kotlin #Swift #JavaScript #AndroidAndiOSAppDevelopment #SaaSDevelopment #SaaS #AISaaS #AIAppDevelopment #EnterpriseSaaS #NativeAndroid #PaaS #Marketplace #Fintech #FintechApp #FinanceApp #FinanceSoftware #SocialMediaAppDevelopment #FirmAppDevelopment #StartupAppDevelopment #StartupSoftware #AIChatbot #AIWebApplication #ComplexAppDevelopment #AppDevelopmentTeam

With over 24 years of expertise in Progress OpenEdge database administration and Java/OpenEdge development, I bring a wealth of experience to the table. My skills extend beyond traditional database administration into the realms of software development and architecture. As a seasoned Progress/OpenEdge/Java Developer and OpenEdge Database Administrator, I excel at optimizing database performance, ensuring data integrity, and leading complex projects to success. My commitment to delivering high-quality solutions is unwavering, and I have a proven track record of achieving exceptional results. I am passionate about leveraging my extensive knowledge to drive database management and software development excellence. Key Skills: 🚀 Programming Languages: Proficient in Progress OpenEdge 9.X, 10.X, 11.X, 12.X 4GL/ABL, Java, Android, HTML, and JavaScript. 🛠️ Frameworks: Experienced in OpenEdge ABL, ADM2, Spring, Struts, JPA, Hibernate, and ZK. 💾 Databases: Well-versed in OpenEdge, MySQL, PostgreSQL, and Oracle. 🌐 Middleware: Skilled in managing middleware technologies such as Tomcat, JBoss, Apache HTTP Server, NGINX, OpenEdge Classic AppServer, PASOE, Webspeed, REST API, SonicMQ, JMS Adapter, and ActiveMQ. 🛠️ Tools: Proficient in Eclipse, OpenEdge Developer Studio, PCT, SVN, ANT, Maven, and Jenkins. 🖥️ Operating Systems: Experienced in Windows, IBM AIX, Linux, and HP-UX. I am eager to collaborate on challenging projects within dynamic organizations that value expertise and innovation in both database administration and software development. Let's work together to drive your projects to success.