Looking for a developer you can trust long-term? I focus on quality, transparency, and sustainable solutions. 💎 Senior Full Stack Developer 🧑‍💻 18+ years of experience 🚀 130+ completed projects 🤝 Long-term collaboration welcome 📅 Consistent weekly progress & updates ⏰ 30+ hrs/week availability 🔁 75% repeat clients 👨‍💻 What I can help you with: - Building websites and web applications from scratch - Improving, fixing, or extending existing projects - Backend development, API integration, forms, admin dashboards - Responsive and cross-browser frontend development - Security, speed, and scalability improvements - Bug fixes, refactoring, and performance optimization - Ongoing support and feature development 🧼 Clean code. 🔍 Clear process. 🚀 Real results. 🛠️ Tech stack: - Back-End Development : PHP / Core PHP / Custom PHP / Node.js / Express.js / Swift / Java Backend - PHP Frameworks : Laravel / Laravel Livewire / Yii / Yii2 / CodeIgniter / Symfony / Symfony4 / Laminas / Zend / Laminas / Phalcon / Slim / Lumen - RESTful API & Protocols : RESTful API / GraphQL / SOAP / XML / JSON / WebSockets - Front-End Development : HTML5 / CSS3 / SCSS / SASS / LESS / JavaScript / TypeScript / ECMAScript / AJAX / Canvas / Adaptive Web Design / Tableless Layout - Front-End Frameworks & Libraries : Vue.js / Vuex / Nuxt.js / Vuetify / Vue / React / React.js / Redux / React Native / Next.js / Flutter / Angular / jQuery / Svelte - CSS Frameworks : Bootstrap / Tailwind CSS / Foundation - Databases : MySQL / MariaDB / PostgreSQL / SQLite / Oracle Database / Supabase / Microsoft SQL Server / Transact-SQL / Database Development / Database Architecture & Administration / ETL - NoSQL : MongoDB / Redis / Memcached / Firebase - CMS & E-commerce : WordPress / WooCommerce / Joomla / Drupal / ModX / Shopify / Magento / Shopware / Vtiger - Cloud & DevOps : AWS / Amazon Web Services / Amazon EC2 / Docker / Kubernetes / Vagrant / Puppet / Continuous Integration / Apache Server / Ubuntu / SSH - Build & Package Tools : Webpack / Vite / Gulp / Grunt / NPM / Yarn / Bower / Composer - Version Control & Collaboration : Git / SVN / GitHub / GitLab / Bitbucket / Gitflow /Jira / Confluence / Redmine - Artificial Intelligence : OpenAI / ChatGPT / GPT 4+ / IBM Watson / TensorFlow / PyTorch / LLM (Large Language Models) / Prompt Engineering / AI Agents / RAG (Retrieval-Augmented Generation) / LangChain / Hugging Face - Payments & Finance APIs: Pay Pal / Str1pe / Authorize Net / Solid Payments - Third-Party APIs & Integrations: Facebook API / Twitter API / Instagram API / LinkedIn API / YouTube API / Slack API / Google Drive / Google Calendar / Gmail / Google Analytics / Google Ads / Google Maps API / Google Translate / Twilio / VOIP / Zoom API / SendBird / WhatsApp Cloud API - Email & Messaging : PHPMailer / Mailchimp / Mailgun / SendGrid / Amazon SES - GIS & Maps : Google Maps API / Mapbox / VNetGIS - Design & UI Tools : Adobe Photoshop / Sketch / Figma / Affinity Designer / MadCap Flare - Methodologies & Concepts : OOP / SOLID / MVC Develop / Design Patterns / Agile / Scrum / Kanban / SEO / Performance Optimization / Page Load Speed Optimization - Additional Technologies : .NET / Ruby / Python / Assembler - Roles & Specializations : Senior Full-Stack Developer / Back-End Developer / Front-End Developer / Senior Fullstack PHP Laravel Developer / Senior Mobile Developer / Web Application Development / iOS & Android App Development 🏭 Industries & Domains - Real Estate - property listings, CRM, lead capture - Healthcare - secure platforms, physicians, medical treatments - AI & ChatGPT - smart assistants, automation - Education - LMS, dashboard, progress tracking - Dashboard - admin panel, control console, analytics, internal tools - SaaS - MVP, subscriptions, scalable platforms - HR & Recruitment - hiring platforms, internal systems, workflows - Mobile App Development - cross-platform, custom mobile apps - E-commerce - online stores, payments, booking, ecommerce, conversions 🧠 Have a project in mind or need a reliable developer long-term? 📩 Send me a message

Kana | Full Stack Developer | Project Manager | 15+ Years Experience 🚀 Transforming Ideas into Scalable Solutions With 15+ years of industry experience, I lead the development and management of innovative, high-impact solutions across diverse tech stacks. I am a seasoned Full Stack Developer and Project Manager, committed to delivering exceptional results that meet both business goals and user needs. 🔑 Why Work With Me? Expert in Full Stack Development: Proficient in JavaScript (React, Node.js, Angular, Vue), Python, PHP, Ruby, and Java, delivering clean, maintainable code for scalable applications. Project Management Excellence: Experienced in leading cross-functional teams, driving projects from concept to completion using Agile, Scrum, and Kanban methodologies. End-to-End Solution Delivery: From design and architecture to deployment and optimization, I oversee all phases of the development lifecycle. Spatial Technologies & Data-Driven Solutions: Expertise in Geospatial Technologies, GIS, and Spatial Data Analysis, helping businesses harness the power of location-based services and mapping solutions. Cloud Integration & DevOps: Skilled in AWS, Azure, and Google Cloud platforms, ensuring efficient and secure cloud architecture. Mobile & Web Applications: Building responsive, user-centric apps that scale seamlessly across platforms. Continuous Improvement: Passionate about continuous learning and staying up-to-date with the latest industry trends and technologies. 🌟 What I Offer Full Stack Development: Frontend, Backend, Database Management End-to-End Project Management: Planning, Execution, Delivery Custom Geospatial Solutions: Mapping, GIS, Location-based Data Solutions Cloud Architecture & DevOps Best Practices Agile & Scrum Leadership: Timely, cost-effective, and high-quality delivery Code Optimization & Performance Tuning for Robust Systems My Approach: Collaborative Communication: I work closely with clients to fully understand their vision and business objectives. Transparency & Timely Delivery: Keeping you updated at every stage of development with clear, concise milestones. Commitment to Quality: Rigorous testing and attention to detail to ensure your project exceeds expectations. 🔍 Ready to bring your project to life? Let’s connect and discuss how we can create the next big thing together!

I am a Senior Web Applications Engineer - recently returned to Upwork. What you can expect from me - Fast response times - Beautifully designed interfaces, and systems logic, even more advance tasks - Error and bug free services & applications - Documentation & transparency

Develop and support complex websites and applications using WordPress, Laminas (Zend Framework), React, Node.js. Have experience with LMS and SCORM, including integrations and maintenance. Clean up, stabilize, and launch legacy, poorly or "vibe" coded projects, helping clients turn unfinished or unstable code into production-ready solutions.

🔥 I am a Senior Full Stack Developer and Web Developer specializing in PHP-based backend systems, scalable web development, high-performance web applications, and database architecture. I build secure, optimized, and production-ready solutions with strong expertise in backend engineering, API development, AI integration, frontend systems, and full stack product delivery. ✔ I have extensive experience working with PHP, Laravel, Phalcon, CodeIgniter, Zend, Yii, MySQL (as well as MS SQL and Oracle), along with modern frontend technologies including Vue.js, JavaScript, jQuery, AJAX, HTML/CSS, and responsive UI development. I design and develop scalable backend systems, REST APIs, SaaS platforms, and business-critical web applications with a strong focus on clean architecture, performance optimization, and reliable database design. 🔧 As a Full Stack Developer, Vue.js Developer, and Web Developer, I build responsive frontend dashboards, admin panels, data-driven interfaces, and scalable frontend-backend integrations that deliver complete end-to-end web development solutions. I specialize in building stable and scalable systems with optimized queries, efficient data handling, and maintainable architecture. ✔ I have strong experience in database design, SQL optimization, and working with large-scale relational databases to ensure performance, consistency, and scalability. ✔ I also integrate AI-powered solutions into applications, including OpenAI-based features, automation workflows, AI assistants, and intelligent backend systems that improve business processes and user experience. ⚙️ Additionally, I have experience with payment system integrations such as PayPal and Authorize.Net, ensuring secure and reliable transaction processing for SaaS platforms, e-commerce systems, and custom web development projects. Beyond PHP development, I also work with Python for backend automation and AI-related tasks, WordPress for CMS and website development solutions, and Android development for mobile applications. This allows me to support multi-platform and cross-technology solutions. ✔ I also handle Linux server administration, deployment, and environment configuration, ensuring stable and production-ready hosting infrastructures. 💡 Core Skills & Keywords Full Stack Developer, Web Developer, Web Development, PHP Developer, Laravel Developer, Vue.js Developer, CodeIgniter Developer, Phalcon Developer, MySQL Expert, Database Architecture, SQL Optimization, Backend Developer, Frontend Developer, API Development, AI Integration, OpenAI, Web Application Development, Payment Integration, PayPal, AuthorizeNet, JavaScript, jQuery, Python Developer, WordPress Developer, Android Developer, Linux Server Administration, Data Management, Scalable Systems 🚀 Let’s build a scalable, secure, and high-performance application for your business! Click “Invite” or “Hire” to discuss your project and start working together.

🖥️ Front-end Development, 🔙 Back-end Development, 🔗 API Integration, 🗄️ Database Management, 🌐 Server and Agile Management, 📚 Version Control and CMS Meet M. Adnan Masood, a seasoned developer with over 12 years of experience in the industry. As a Top Rated Plus freelancer on Upwork, I have successfully completed numerous projects, accumulating over 17,237 logged hours. My comprehensive expertise encompasses both front-end and back-end development, offering tailored solutions to meet clients’ unique needs. I specialize in creating seamless user experiences and robust applications. Dedicated to maintaining high-quality standards, I strive to build long-lasting client relationships. Let’s connect to explore how I can elevate your project to the next level. As a dedicated and professional full-time freelancer with over 12 years of experience, I am proud to be a consistent Top Rated Plus freelancer on Upwork, having logged over 17,237 hours. My expertise spans both front-end and back-end development, ensuring comprehensive solutions for my clients. 🖥️ Front-end Development: Crafting visually appealing and interactive user interfaces using HTML/CSS, Bootstrap, JavaScript, AJAX, jQuery, Vue.js, and React.js. 🔙 Back-end Development: Developing secure and scalable server-side applications with PHP, Zend, Codeigniter, Laravel, Symfony, Node.js, and Express.js. Expertise in API Development, cURL, and Web Services. 🔗 API Integration: Seamlessly integrating third-party services such as Google, Facebook, Twitter, Google Maps, EAN, eBay, PayPal, Stripe, and YouTube, as well as custom API solutions. 🗄️ Database Management: Managing complex databases with MySQL, PostgreSQL, Elastic Search, and Singlestore to ensure data integrity and performance. 🌐 Server and Agile Management: Expertise in server environments like WAMP, LAMP, Vagrant, AWS, Docker, and Linux. Proficient in Agile Development using Atlassian Jira and Scrum methodologies. 📚 Version Control and CMS: Managing code repositories with Git and SVN. Creating and customizing websites using WordPress. Ready to bring your project to life with my expertise? Contact me today to get started!

I design and build HIPAA-compliant healthcare apps (web & mobile), AI-enabled clinical platforms, and secure Mirth Connect (HL7/FHIR) integrations for hospitals, clinics, and digital health startups. With 15+ years of experience in Healthcare IT, I help organizations modernize legacy systems while preparing for the future by combining interoperability, compliance, and AI into scalable healthcare solutions. WHY WORK WITH ME - Healthcare domain expertise with deep understanding of clinical workflows, billing, RCM, and provider operations - Compliance-first engineering with HIPAA-aligned design, security, auditability, and data privacy built in - Full-stack execution — I don’t just integrate systems; I build complete healthcare platforms end to end CORE SPECIALIZATIONS HEALTHCARE AI & INTELLIGENT SYSTEMS - AI-enabled clinical workflows and analytics - NLP for clinical notes, documents, and structured data - Predictive insights and workflow automation - AI designed with explainability and compliance in mind MIRTH CONNECT & INTEROPERABILITY (HL7/FHIR) - Mirth Connect channel design, optimization, and long-term support - HL7 v2/v3 message processing (ADT, ORM, ORU, SIU, DFT) - FHIR APIs and SMART on FHIR integrations - EHR/EMR, LIS, RIS, HIE, lab, and pharmacy integrations HEALTHCARE APP DEVELOPMENT - HIPAA-compliant web and mobile applications - Provider, patient, and administrative portals - Telehealth and remote care platforms - Secure backend APIs and cloud-native architectures TECHNICAL STACK - Languages: JavaScript/TypeScript, C#, Python, SQL - Frameworks: Next.js, Node.js, .NET Core, React, Flutter - Interoperability: Mirth Connect, HL7, FHIR, CCD/CCDA - Cloud and AI: AWS, Azure, OpenAI APIs, RAG-based architectures SELECTED PROJECT EXPERIENCE - AI-Enabled Pain Management Platform (Painkare.ai) Designed and developed an AI-enabled healthcare platform focused on pain assessment and patient engagement. Built secure, HIPAA-compliant workflows with intelligent analytics to support clinicians and patients while maintaining explainability and data privacy. - Cardiac Remote Patient Monitoring (RPM) System Architected and implemented a cardiac RPM platform integrating data from implantable cardiac devices using HL7 interfaces. Worked with data feeds from major cardiac device manufacturers including St. Jude Medical, Medtronic, Boston Scientific, and Biotronik to normalize, process, and securely deliver clinical data to care teams. - EHR Integrations with Epic and Cerner (FHIR & HL7) Implemented interoperability solutions integrating custom healthcare applications with Epic and Cerner using FHIR APIs and HL7 messaging. Built secure data exchange for patient demographics, encounters, observations, and clinical documents using SMART on FHIR and REST-based integrations. - Enterprise Healthcare Interoperability Programs Designed and supported Mirth Connect-based integration engines handling high-volume HL7 traffic across EHRs, labs, pharmacies, and third-party healthcare systems with monitoring, alerting, and fault tolerance built in. I work with both healthtech startups and enterprise healthcare teams, translating complex requirements into secure, maintainable, and scalable solutions. Message me to discuss your healthcare integration, AI, or application development needs.

Having extensive expertise in project management, finance & investments, accounting and business leadership, I position myself as a web developer with finance and business insight. I believe that code is for users not for developers, therefore I look at algorythms from the standpoint of the final beneficiary to make them smooth and easy to understand. I look for interesting and challenging projects, but will accept minor tasks, like cleaning your code from bugs and understanding the logic of your shopping engine. My specialities: 1) backend: - Python stack (Django, Flask, FastAPI), - PHP stack (Laravel, Zend Framework), - Node.JS stack (AWS Lambdas, Express.js, Next.js) 2) databases and data stores: MySQL, PostrgreSQL, MSSQL, MongoDB, Redis 4) frontend: plain Javascript, ReactJS, Angular, Vue.JS, 5) mobile: React Native, 6) integration between web and corporate systems (ERP and Accounting systems, Warehouse management systems, call management systems); 7) devops: full scope Linux Server administration; cloud administration for AWS, Google Cloud, IBM Cloud, Openshift; CI/CD with initiation from github / bitbucket; docker / k8s, auxiliary technologies.

I'm a full stack web and application developer with over five years of experience building websites, custom applications, and e-commerce solutions. I work with a wide range of technologies and platforms—including modern JavaScript frameworks like React and backend technologies like Python—and I focus on creating clean, functional, and scalable solutions that align with business goals. Over the years, I’ve delivered projects for startups, small businesses, and established companies across various industries. Whether you need to launch a new site, integrate a custom feature, or build a complex web app, I can help bring your idea to life—efficiently and professionally. My skill set includes: Front-End Development: React, JavaScript, HTML5, CSS3, jQuery Responsive, mobile-friendly design Dynamic UI development using Canvas, SVG, and interactive components Back-End Development: Python (Flask, Django), PHP (CodeIgniter, Yii, CakePHP, Zend), Node.js RESTful APIs, JSON, AJAX, MVC architecture Custom logic, integrations, and backend features for web apps and e-commerce platforms CMS & E-Commerce Platforms: WordPress, Shopify, Magento, Joomla, Drupal, Prestashop WooCommerce, OpenCart, OSCommerce Theme and plugin development, site customization, and third-party integrations Database Technologies: MySQL, PostgreSQL, MSSQL, Oracle, MongoDB, and other NoSQL solutions Structured and optimized database design for performance and scalability Other Tools & Technologies: Git, GitHub/Bitbucket, API integrations, deployment tools Cordova / PhoneGap for hybrid mobile apps CRM and ERP integration experience (VTiger, SugarCRM)

I am MAGENTO CERTIFIED developer with over 17 years of intensivework in the web development and 11 years in e-commerce industry. I am a part of the Polcode team, a Polish software development company established in 2006 with over 150 developers, designers, project managers, DevOps and QA specialists onboard. This means that besides my programming skills you always have access to a full-stack product design & development team. I became an effective expert, application developer focused on delivering high quality code and top notch solutions. I have experience in all aspects of building large-scale web based applications. I have genuine interest in technology, up to date with best practices at every level of development. I'm an engineer who understands that technology ultimately supports a business and should contribute to the bottom line. This understanding guides all my consulting endeavours. My technical expertise: - Version Control Systems: Git, Bitbucket, GitLab - Databases: MySQL, MariaDb - Server workexperience: Apache - Frameworks: Magento, ZendFramework, Slim Framework, Casperjs, - Project management tools: JIRA, Redmine, Basecamp - Test Driven Development, Modularity, OOP, Acceptance tests My technology stack: - Magento: frontend, backend, performance optimization, SEO, modulesimplementation, extensions, development from scratch, integration with externalsystems, implementation RWD Magento skins, multilanguage and multistoreinstances - PHP 5/7 (OOP), MySQL, MVC - HTML5, CSS3, Prototype JS, AJAX, jQuery, XML, JSON, QR code More about Polcode Polcode provides customized software solutions for startups, SaaS companies, eCommerce stores, and enterprise clients worldwide. From building the product from scratch to extending the existing teams, we have expertise in a diverse set of open source technologies and platforms to bring innovation in an agile fashion. Our team excels in PHP, Symfony, Laravel, Magento, Go, React Native, React.js, Vue.js, Ruby on Rails and Angular. With over 150 people, Polcode has either empowered client teams or delivered end-to-end development projects for brands from fintech, manufacturing, consulting, eCommerce, marketing or eLearning industries and is recognized as Top Developer in Poland by Clutch. Looking forward to our cooperation! Paweł, Polcode Dev Team