More than 21 years of experience on Java/JEE, PHP, C, C++, Perl, Shell Script, JavaScript MySql and Oracle technologies. An experienced Software Engineer/Architect with having strong R&D[Research & Development] background. Enjoy working on research based development, creating API/SDK, application framework and performance engineering, testing, code profiling, code optimizing, query optimizing, team and project managing. Experienced in designing Cloud computing/service, Semantic web, Sensor network, Ontology, SSO/Identity management, Asynchronous architecture, Mobile based App[Android] Data collector[xForm], Asterisk[AMI/AGI] based interactive IVR application, mHealth, e-Education, disaster and early warning system, Courier & Freight Software, Warehouse & Retail Supply Chain Software, Corporate Mailroom Software, Travel Software, Billing software and Web Bot. Wide and deep knowledge in Java/JEE Technology & OOP Architecture, REST/RESTful architecture, design patterns. Experience in Business intelligence and Reporting Tool. Workflow and BPMS. RDBMS. Solid background in Object-Oriented analysis and design UML, Design Patterns, Architecture Patterns and Software development methodology (Agile/SCRUM/TDD). Technical experienced on Java/JEE, EJB3.0, Spring, Hibernate, JPA, JSF, RichFaces , PrimeFaces Wicket, Struts, DWR, GWT, AngularJS, PhantomJS, Android, HTML, CSS, JS, jQuery, JAX-WS, JAX-RS, SOAP, Maven, Gradle, Jenkins , CloudBees, Google App Engine, Amazon AWS, jBPM , ESB, Node.js ,MySQL, ORACLE, PostgreSQL, SQL Server, MongoDB etc My preference to work on long term project. It could be hourly or fixed price job but hourly job is my first preference. I would like to maintain trustworthily long term relationship through good work. If anyone is there on the same page and match my criteria please poke me for further... More details about technical skills --------------------------------------------------------------------- Programming Languages: J2EE/J2SE/J2ME, Scala, JRuby, C/C++, Assembly, HTML/HTML5 /DHTML/ XHTML, JavaScript, Ajax, XML/XSL, PHP, Android. Frameworks & Toolkits: Spring, EJB3.0, JPA, Hibernate, S2Dao, S2Hibernate, Seasar, JSF, RichFaces, PrimeFaces, Wicket, Struts, DWR, SWT, GWT, Facelets, MIDP 2.0, JavaRosa, Smarty, ADODB, Yii, CodeIgniter, Laravel, Node.js, Dojo, jQuery, AngularJS, PhantomJS. GUI's: SWT, Eclipse RCP & RAP, JFace, Swing/JFC, AWT, JavaDesktop, Java2D, JGoodies. Databases: Oracle, MYSQL, PostgreSQL, MongoDB, SQL Server, JavaDB, FireBird, HSQL Template Languages: Apache Velocity, Handlebars, Nunjucks Build and Logging Tools : Apache Ant, Maven, Gradle , Jenkins , Log4j, gulp, Liquibase Application Servers: Glassfish, Tomcat, WildFly, WebLogic, Jetty Testing Tools: Selenium, JUnit, EasyMock, Mockito, Mercury LoadRunner, JMeter, BlazeMeter. XML's: XML (Dom, Xerces), XPath, Schema, XSD, RDF, Xform (openrosa & javarosa). Workflow (BPMS) & ETL: jBPM, Kettle, Talend. Business Intelligence & Reporting Tool: Eclipse BIRT, Pentaho, JasperRepors. IDE's: Eclipse, NetBeans, IntelliJ, MyEclipse Project Management Tools: SFEE (Source Forge Enterprise Edition), Subversion, Mylyn, Version One, Target process, JIRA, WorkFront, Asana, Redmine, CVS, SVN, GIT, Marcural Methodologies: RUP, Agile, XP, Scrum Operating Systems: Sun-Solaris-x86(10), Linux Family (Redhat/obuntu/Suse), Windows Family (NT/XP/98/2000/2003, vista).

Full-stack developer with +25 years of experience based in Southern California. I can help you to: - upgrade and maintain your legacy Rails, Flask, Django, Odoo, PHP, React app - upgrade Heroku stack & database with minimal downtime, - implement complex D3 visualizations, refactor complex React / Vue codebase, - add/improve test code coverage in your Rails, Flask, Django, PHP, React app, - create v1 of your business idea

I design and build scalable, intelligent systems that empower businesses to streamline operations, automate workflows, and innovate faster—leveraging the full power of the Microsoft ecosystem. With deep expertise in .NET C#, Azure, Dynamics 365, and Power Platform, I specialize in building end-to-end solutions that bridge technology with business outcomes. From PowerApps and Power Automate to custom connectors, coded components, and web parts for SharePoint, I create solutions that extend platform capabilities and deliver real results. Beyond my hands-on development skills, I bring strong project leadership and systems thinking to every engagement. I’ve led full project lifecycles, from architecture to deployment and built best practices for sustainable, high-performing development teams. What sets me apart is my ability to translate complex technical requirements into actionable, business-focused solutions. I don’t just build systems, I solve real problems, reduce development time, and enable my clients to move faster with confidence. If you're looking for a developer who understands both the code and the context, let's connect and build something impactful together.

Top Rated Plus Backend Developer with 8+ years of experience building web applications, APIs, automation systems and data platforms. I help businesses automate workflows, integrate third-party services, modernize legacy applications, and build scalable backend systems that are reliable in production. ✓ 78+ Upwork Projects ✓ 5,000+ Hours Worked ✓ 100% Job Success ✓ Top Rated Plus ✓ 60% Repeat Clients Specialized in Ruby on Rails, Laravel, Web Automation, Data Scraping, and Legacy System Modernization. Recent projects include: ✓ Built large-scale review aggregation systems ✓ Developed booking and scheduling platforms ✓ Created web scraping systems using proxies and browser automation ✓ Integrated Stripe, PayPal, Braintree and Chargebee ✓ Modernized legacy applications without disrupting production users ✓ Designed REST APIs consumed by mobile and web applications ✆ Available for free Consultations

I fix Laravel systems that matter too much to break, and I build new ones fast without compromising on quality. Recent work: - Stabilized a 12-year-old government tracking platform still in daily production - Led a compliance-driven refactor for a financial services firm - Built and launched a 140-tool production SaaS solo in four months, using AI coding agents behind a 20-year engineer’s architecture Most engagements start with a fixed-scope Codebase Audit: $3,500–7,500, two weeks. You get an architecture, security, and data-integrity assessment plus a phased roadmap your team or I can execute. No surprises, no open-ended retainer until you’ve seen how I think. Clients bring me in when: - A system has outgrown its original design - An AI-generated app has hit its ceiling and nobody’s sure what’s inside - Mistakes are expensive: government, financial, medical, compliance-sensitive - They want one senior engineer instead of four juniors What I’m strong at: - Refactoring and modernizing legacy Laravel and PHP - Multi-tenant, role, and permission systems - Data integrity, transactions, auditing, and traceability - Queues, background processing, real-time updates, API integrations - Shipping new products quickly with AI agents, without the mess they leave when nobody senior is watching On AI: I use coding agents every day and they make me several times faster. They don’t make the architecture decisions, touch security, or decide what “correct” means. That’s the difference between an AI-built app and an AI-accelerated one. 20+ years, 25 Upwork contracts, 17,000 hours, 100% job success. US-based, remote, calm when things are on fire. If you’ve got a Laravel system that needs a steady hand, or a new one that needs to exist by next quarter, let’s talk.

✅ 85+ Projects Delivered ✅ Top-Rated Plus Freelancer ✅ Over 18000+ UpWork hours 𝐋𝐨𝐨𝐤𝐢𝐧𝐠 𝐟𝐨𝐫 𝐚 𝐬𝐞𝐚𝐬𝐨𝐧𝐞𝐝 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 𝐰𝐡𝐨 𝐜𝐚𝐧 𝐭𝐮𝐫𝐧 𝐜𝐨𝐦𝐩𝐥𝐞𝐱 𝐫𝐞𝐪𝐮𝐢𝐫𝐞𝐦𝐞𝐧𝐭𝐬 𝐢𝐧𝐭𝐨 𝐫𝐨𝐛𝐮𝐬𝐭, 𝐡𝐢𝐠𝐡-𝐩𝐞𝐫𝐟𝐨𝐫𝐦𝐢𝐧𝐠 𝐰𝐞𝐛/𝐝𝐞𝐬𝐤𝐭𝐨𝐩 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬? With over 20 years of hands-on experience, I build custom web and desktop solutions, SaaS platforms, and enterprise tools designed for reliability, speed, and scalability. Whether you need a top-tier developer to join your existing team or an expert to build your project from scratch, I’ve got you covered. 🚀 𝐖𝐡𝐚𝐭 𝐈 𝐁𝐫𝐢𝐧𝐠 𝐭𝐨 𝐭𝐡𝐞 𝐓𝐚𝐛𝐥𝐞: ➤ End-to-End App Development: SaaS products, CRMs, Marketplaces, Membership portals, and Multi-tenant systems. ➤ Cloud & Serverless Architecture: Cost-efficient backends powered by AWS CDK, Lambda, and DynamoDB. ➤ Backend & API Integrations: Build scalable microservices, RESTful API creation, third-party integrations, complex CRUD operations. ➤ Existing Codebase: Troubleshoot, maintain, modernize, or add complex features to legacy applications. ➤ Team Augmentation: Seamlessly integrate into your development team to accelerate delivery. 🛠️ 𝐂𝐨𝐫𝐞 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤: ➤ JavaScript / TypeScript: Node.js, Electron, Angular, Vue.js ➤ PHP & Frameworks: Laravel, CodeIgniter, Yii ➤ Cloud & Serverless: AWS CDK, Lambda, DynamoDB ➤ CMS Platforms: WordPress, Craft CMS ➤ Database & DevOps: PostgreSQL, MySQL, Apache, Nginx, Git 🤝 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞: ➤ Clear & Direct Communication: No jargon confusion, prompt updates, and quick alignment on goals. ➤ Long-Term Mindset: I build scalable, maintainable code designed to grow alongside your business. ➤ Quality First : Tailored solutions precise to your business specifications—delivered on time. Ready to bring your project to life? Send me a message, and let’s discuss how we can turn your goals into reality.

Are you looking to build a high-performance SaaS platform, automate a complex supply chain, or integrate secure, production-ready AI into your business workflow? Many developers can write code, but very few understand how to seamlessly blend cutting-edge AI/ML systems with scalable, enterprise-grade architecture while ensuring strict data security (HIPAA, PCI-DSS). I am a Full-Stack Developer and AI/ML Engineer with extensive experience architecting end-to-end solutions for SaaS, Supply Chain, Healthcare (HIS/HMS), and custom ERP systems. Whether you need to build an MVP from scratch or scale an existing enterprise platform, I deliver clean, maintainable code and robust infrastructure. 🚀 Core Expertise & How I Can Help You: AI/ML & GenAI Integration: Building intelligent RAG systems, custom chatbots, and LLM-powered workflows using OpenAI, Anthropic, LangChain, and Vector Databases (Pinecone, Qdrant). Robust Backend & Architecture: Designing secure, high-throughput microservices and APIs using Node.js (NestJS), Python (FastAPI/Django), and PHP, backed by PostgreSQL, MongoDB, or Redis. Modern, Responsive Frontends: Crafting seamless web and mobile interfaces using React, Next.js, Angular, Vue.js, and React Native. Cloud, DevOps & Compliance: Deploying production-ready applications on AWS/GCP/Docker with CI/CD pipelines, keeping security and regulatory standards (HIPAA, GDPR) at the forefront. 🛠️ Technical Snapshot: Frontend: React, Next.js, Angular, Vue.js, React Native, Tailwind CSS Backend: Node.js (NestJS/Express), Python (FastAPI/Django), PHP, Java AI/ML: LLMs, LangChain, Vector DBs, Prompt Engineering, RAG Systems Cloud & Databases: AWS, GCP, Docker, Kubernetes, PostgreSQL, MySQL, MongoDB, Redis Let’s build something scalable. Click the "Invite to Job" or "Hire" button on the top right, and let’s discuss how we can bring your project to life.

- Experienced Flutter/Dart Developer: Proficient in developing mobile applications using Flutter and Dart. - Firebase Integration: Skilled in integrating Firebase services with Flutter applications, including push notifications and cloud functions. - Software Architecture: Strong background in clean architecture and test-driven development (TDD) practices. - Corporate Data Systems: Experience with large volume corporate data systems and technologies, including Laravel/PHP, Bootstrap, Java Web, JavaScript, jQuery, HTML, PL/SQL, C, C++, Perl, Natural, and ADABAS. - Data Analysis and Maintenance: High-performance data analysis and maintenance for reports and system corrections using databases such as MySQL, Oracle, and SQL Server. - Complex Systems Development: Expertise in creating, constructing, and maintaining complex systems tailored to various industries. - Industry Knowledge: Extensive knowledge and interaction with high-performance systems, serving clients in telecommunications, steel, and government sectors. - Python Proficiency: Academic training and experience with Python, including the development of neural network models. - Mathematics Expertise: Solid knowledge in mathematics, complemented by didactic experience. - Language Skills: Native Brazilian Portuguese speaker.

I am a resourceful and dynamic developer that is fluent in most flavors of Microsoft's developing environment. I also have a long history working with Microsoft SQL server. I have worked extensively in acquiring, normalizing, processing, managing and analyzing data. Finally, I am very experienced as a full stack developer developing complex data management application for the desktop and the web. In addition to my experience with Microsoft technologies I have also worked with Xcode, Cold Fusion, Perl, Java, JQuery and Transact SQL. I am customer oriented (check my feedback) and able to contribute as a productive team member. I have been a full time free lance developer since 1999 and will successfully complete your project.

Having a bachelors degree in CS and over 14 years of experience in the software industry, I know how to apply technology to achieve business goals. I have been a programmer all my professional life. I have participated and delivered projects ranging from VoIP, Salesforce, DevOps, Database (Sql NoSQL, Proprietary etc), XML, JSON using variety of programming languages like Apex, Perl, PHP, Visualforce, Lightining Components, Javascript, CSS, HTML and technologies like Radius AAA, RabbitMQ, Redis.io, Mysql, MemCache, Asterisk, OpenSIPS/Kamailio, CDR Billing, Third Party API Integrations (Google Maps, Google Translate, Google Speech-To-Text, Intercom, Gocardless, Stripe, Pagerduty to name a few) etc. I am a self learner and treat programming language as a tool to solve problems i.e. always willing to learn new technologies and languages.