$𝟏𝐌 𝐄𝐚𝐫𝐧𝐢𝐧𝐠𝐬 | 𝟏𝟔𝐤+ 𝐇𝐨𝐮𝐫𝐬 𝐖𝐨𝐫𝐤𝐞𝐝 | 𝟏𝟎𝟎% 𝐉𝐨𝐛 𝐒𝐮𝐜𝐜𝐞𝐬𝐬 𝐒𝐜𝐨𝐫𝐞 | 𝐄𝐱𝐩𝐞𝐫𝐭 𝐕𝐞𝐭𝐭𝐞𝐝 🏅 Senior Full Stack Developer and AI Engineer with 15 years of experience building scalable web platforms, SaaS products, enterprise applications, and MVPs. As a Full Stack Developer, I take ownership of the entire product lifecycle—from discovery and architecture to deployment and long-term scaling. By combining modern AI-powered workflows with deep engineering expertise, I help businesses launch faster, reduce development costs, and build products that are ready to grow. As a Full Stack Developer, I leverage AI-powered tools including Cursor, GitHub Copilot... to accelerate development without compromising code quality. My experience as an AI Engineer allows me to integrate intelligent features, automate workflows, and build AI-driven products that create real business value. Whether you're building an MVP or scaling an existing platform, you can expect a Full Stack Developer who focuses on business outcomes first. I build maintainable architectures, deliver clean code, and ensure every technical decision supports your long-term product strategy. My work with React, Node.js, and Next.js enables me to create high-performance applications that are fast, secure, and scalable. 𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐞𝐬 𝐈 𝐬𝐩𝐞𝐜𝐢𝐚𝐥𝐢𝐳𝐞 𝐢𝐧: 💰 FinTech & Banking Platforms 📊 SaaS & Dashboards 🤖 AI Applications 🩺 Healthcare & MedTech 🏡 Real Estate Platforms 🏢 Corporate Websites 🛒 E-commerce ✈️ Travel & Logistics 🧘 Wellbeing & Fitness Apps ❤️ Social Apps & Dating Apps ⚙️ Management Systems 💎 Luxury Membership Platforms 🚸 Children's Applications 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤: 🤖 𝐀𝐈 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠 𝐀𝐬 𝐚𝐧 𝐀𝐈 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫, 𝐈 𝐛𝐮𝐢𝐥𝐝 𝐢𝐧𝐭𝐞𝐥𝐥𝐢𝐠𝐞𝐧𝐭 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 𝐮𝐬𝐢𝐧𝐠 • OpenAI API • GitHub Copilot • Cursor • Lovable.dev • AI automation and workflow integrations • AI integrations ⚛️ 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 As a Full Stack Developer, I specialize in modern frontend technologies including: • React • React ecosystem • React Query • React Router • Next.js • Next.js App Router • Next.js Server Components • TypeScript • Tailwind CSS • HTML5 • CSS3 • JavaScript 🔗 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 My backend expertise includes: • Node.js • Node.js APIs • Node.js microservices • NestJS • Express • Firebase 📱𝐍𝐚𝐭𝐢𝐯𝐞 & 𝐂𝐫𝐨𝐬𝐬-𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦 𝐌𝐨𝐛𝐢𝐥𝐞 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 • Flutter • React Native • Swift • SwiftUI • Kotlin ☁️ 𝐈𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞 • AWS • Docker • Kubernetes • Terraform • CloudFormation • PostgreSQL • MySQL • MongoDB • Supabase • Firebase • Vercel • GitLab CI/CD 🎨 𝐏𝐫𝐨𝐝𝐮𝐜𝐭 𝐃𝐞𝐬𝐢𝐠𝐧 • Figma 🚀 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐇𝐢𝐫𝐞 𝐌𝐞 You work directly with one experienced Full Stack Developer instead of coordinating multiple specialists. As both a Full Stack Developer and AI Engineer, I bridge product strategy, frontend, backend, infrastructure, and AI implementation under one roof. My expertise in React enables me to build modern, responsive user interfaces that users love. My experience with Node.js allows me to create reliable APIs and scalable backend services. Using Next.js, I deliver SEO-friendly, high-performance applications optimized for speed and growth. Clients choose me because I combine the technical depth of a Full Stack Developer with the innovation of an AI Engineer. Whether it's a SaaS platform, enterprise application, AI-powered product, or startup MVP, I use React, Node.js, and Next.js to deliver solutions that scale. 📈 𝐖𝐡𝐚𝐭 𝐘𝐨𝐮 𝐂𝐚𝐧 𝐄𝐱𝐩𝐞𝐜𝐭 • Complete ownership from idea to production • Fast MVP development using AI-assisted workflows • Scalable architecture built with React, Node.js, and Next.js • Clean, maintainable code • Transparent communication • 100% IP ownership upon delivery • Fluent English • Seamless collaboration via Slack, Jira, GitHub, and Notion If you're looking for a Full Stack Developer who can also act as an AI Engineer, delivering modern products powered by React, Node.js, and Next.js, I'm ready to help you build software that moves your business forward. 📞 Let’s catch up right NOW and focus on what matters for your first release 📞 Ivan Kovač ___________________________________________________ Discover me by: #FullStackDeveloper #FullStackExpert #FullStackSpecialist #BackendDeveloper #FrontendDeveloper #React.js #Node.js #Next.js #SeniorDeveloper #WebDevelopment #MobileDevelopment #Flutter #Kotlin #Swift #iOSDeveloper #AndroidDeveloper #API #Enterprise #SaaSDeveloper #AdminDashboard #WebSecurity #AWS #Azure #GoogleCloudPlatform #UX/UIDesign #ProductDesign #LLM #AIAgents #GitHub #Co-Pilot #ChatGPT #Cursor #WindSurf #ClaudeSonet #AIEngineer #SaaSPlatform #AI-First Full Stack Developer # AI-Powered Full Stack Developer

Senior Full Stack Programmer & Tester | Automation & Testing Expert My skill list: PYTHON JS PHP C C++ SCRAPING: SELENIUM AND APPIUM and .... iOS reverse: Ghidra and ... HTML CSS MYSQL MongoDB ....

Oracle certified associate, java 8 programmer I Over 13+ years, I have developed a wide range of web applications using Java, J2EE, JSF, Primefaces, Struts, LDAP, maven, Spring, Spring-boot, Spring-data, Spring-JPA, Hibernate, GWT, Oracle, MySql, Weblogic, Tomcat, WildFly/Jboss, PHP. My core competency lies in complete end-end management, I am seeking opportunities to build products from the ground up for you.

I help businesses build scalable, secure, and AI-powered digital products that perform at enterprise level. With 12+ years of experience, I design and develop high-performance web and mobile systems optimized for speed, reliability, and future growth. I specialize in turning complex ideas into scalable, production-ready platforms using clean architecture, cloud automation, and modern technology stacks delivering fast, reliable results without compromising quality. 🚀 🔥 𝐂𝐨𝐫𝐞 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠 & 𝐔𝐈 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 1. React.js, Next.js, Vue.js, TypeScript, Tailwind CSS 2. Pixel-perfect, responsive, high-converting UI/UX 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 & 𝐀𝐏𝐈 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞 1. Node.js, Laravel, FastAPI, GraphQL 2. REST APIs, microservices, scalable system design 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬 & 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐎𝐩𝐭𝐢𝐦𝐢𝐳𝐚𝐭𝐢𝐨𝐧 1. PostgreSQL, MySQL, MongoDB 2. High-performance queries, caching, indexing 𝐂𝐥𝐨𝐮𝐝, 𝐃𝐞𝐯𝐎𝐩𝐬 & 𝐈𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞 1. AWS, DigitalOcean, Docker, Kubernetes, CI/CD 2. Secure, automated, and scalable deployments 𝐀𝐈 & 𝐌𝐨𝐝𝐞𝐫𝐧 𝐓𝐞𝐜𝐡 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 (𝐓𝐫𝐞𝐧𝐝𝐢𝐧𝐠) 1. OpenAI & GPT API integrations, AI automation, and intelligent recommendation systems 2. Real-time data processing, streaming, and analytics 📈 𝐏𝐫𝐨𝐯𝐞𝐧 𝐈𝐦𝐩𝐚𝐜𝐭 ✅ Built a HIPAA-compliant healthcare SaaS platform managing 10K+ patient records with zero security incidents ✅ Increased e-commerce conversion rate by 35% within 90 days through performance and UX optimization ✅ Boosted organic traffic by 220% by migrating to an SEO-optimized WordPress architecture ✅ Reduced infrastructure costs by 60% by refactoring a monolithic SaaS platform into microservices 💡 𝐖𝐡𝐚𝐭 𝐌𝐚𝐤𝐞𝐬 𝐌𝐞 𝐃𝐢𝐟𝐟𝐞𝐫𝐞𝐧𝐭 1. Enterprise-grade architecture with startup-speed delivery 2. Clean, scalable, and future-proof code 3. Business-driven development, not just coding 4. Long-term partnership mindset Message Me for High-Performance Apps

I’m Rajibul Ahsan, a Senior Full Stack Developer and AI Integration Specialist, helping startups and growing businesses build scalable web apps, mobile apps, MVPs, and AI-powered products. I specialize in cross-platform mobile development with Flutter and React Native (iOS & Android), including full App Store and Google Play publishing support. 96 jobs completed | Top Rated | From frontend and backend to databases, cloud infrastructure, and AI integration — I handle the full development lifecycle myself, so you work with one experienced developer instead of coordinating multiple teams. I have hands-on experience building fintech apps, health and wellness apps, ride-sharing apps, AI-powered connection-based apps, and SaaS products - taking ideas from zero to one with clean code architecture and scalable backend systems. Process Overview - Project Discussion I first understand your app idea, target users, required features, design preferences, and business goals. - Planning & Architecture I create a clear development plan, choose the right tech stack (Flutter, React Native, Node.js, Firebase, or Supabase), and structure the app for scalability, security, and future updates. - UI/UX Implementation I build clean, responsive, and user-friendly screens based on your design or wireframe — optimized for both iOS and Android. - Backend & API Integration I connect Firebase, Supabase, custom REST APIs, OpenAI or LLM-based AI features, payment gateways, user authentication, push notifications, real-time chat, in-app purchases, and other required systems. - Testing & Bug Fixing I test the app on different devices, fix issues, improve performance, and make sure the app runs smoothly across iOS and Android. - App Store & Google Play Submission I prepare the final build, handle all store requirements, and support submission to the App Store and Google Play. - Post-Launch Support After launch, I can help with updates, bug fixes, new features, and long-term maintenance. Why clients choose me: ✔ Top Rated on Upwork | 94% Job Success Score ✔ 96+ completed projects | $20K+ earned ✔ 0–4 hour response time | Available full-time ✔ Clean code architecture, cross-platform expertise, thorough documentation & App Store submission support Ready to turn your app idea into a real product? Send me a message or invite me to your job post, and we can schedule a 15-minute call to discuss your idea and next steps.

I am a Solution Architect and Full-Stack Engineer with 22+ years of experience building SaaS platforms, healthcare systems, and complex workflow solutions. Example: Architected and built a multi-tenant healthcare practice management system supporting patient intake, scheduling, lab integrations, and RCM workflows. What I Help Healthcare and SaaS Clients Build: • Healthcare SaaS Platforms – practice management systems, patient portals, telehealth workflows • Multi-Tenant SaaS Applications – scalable dashboards, admin portals, workflow automation • AI-Enabled Product Features – document processing, AI agents, automation pipelines • Integration Platforms – EHR integrations, third-party APIs, and CRM systems • Data-Driven Dashboards – analytics, reporting, operational dashboards Over the past decade, I have worked extensively in healthcare, developing systems such as: • Practice management platforms • Patient intake and scheduling systems • Lab integrations and patient portals • Revenue cycle management (RCM) workflows • EHR integrations with systems such as AthenaHealth, DrChrono, Waystar, and TriZetto • Healthcare document processing and fax automation systems Many of these platforms required HIPAA-sensitive data handling, complex business logic, and secure multi-tenant architectures. Core Expertise • SaaS Architecture & Multi-Tenant Systems • Healthcare Technology & Workflow Automation • AI Integration (OpenAI / Claude / document processing / Azure AI Foundry / AI Agents / Agno) • API Integrations & Backend Architecture • Full-Stack Development (React / Python / Node / Java / Spring) • Cloud Platforms (AWS / Azure / GCP / scalable SaaS infrastructure) Technologies • React · Next.js · Node.js · Python · Java · Spring Boot • PostgreSQL · MySQL · MongoDB • Supabase · REST APIs · Cloud integrations Certifications • TOGAF 9.1 Certified Enterprise Architect • Sun Certified Developer for Java Web Services (SCDJWS) • Sun Certified Java Programmer (SCJP)

Python • AI Integration • AI Automation • FastAPI • Flask • Django • Backend Development • SaaS Development • MVP Development • AI Agent Development • Prompt Engineering • N8N • Zapier • Data Engineering • Business Process Automation I build production-grade SaaS platforms, AI-integrated products, and business automation systems for founders and CTOs who need an engineering partner: not a task executor. Over 10+ years and 190+ completed projects, I've learned that the real value isn't writing code on request: it's understanding the business problem well enough to make the right technical call, then owning that decision through to production. What I Deliver AI Integration & Automation : OpenAI and Claude API integration with proper prompt engineering, AI agent workflows for multi-step task automation, plus process automation built in N8N and Zapier that removes manual steps from a client's process. Backend & SaaS Development : Production-grade backends built primarily with Python (FastAPI, Flask, Django) full SaaS products and MVPs built end to end. Also comfortable working in Ruby on Rails when a client's existing codebase or team calls for it. I design APIs for real production load authentication, async processing, clean data models. Business Process Automation & Data Engineering, Python-based ETL pipelines and data acquisition systems that turn scattered information into structured, usable business intelligence collection, cleaning, transformation, delivery into a database or dashboard your team can use. Chrome Extension Development, Custom browser extensions for automation, data capture, and workflow tools, shipped and used in production. Proven Results Euka AI: AI-powered CRM for social commerce. Built core platform features including dashboard workflows, creator discovery and outreach automation, campaign management, and API integrations. ContentDrafter: AI SaaS platform for automated content generation with subscription-based access. Built the AI integration layer, prompt workflow system, authentication, and scalable backend APIs. Optima CRM: Custom CRM for sales pipeline and customer management. Delivered dashboards, lead management, role-based access control, and reporting end to end. Qreates: AI-powered SaaS platform converting product images into interactive 3D visualizations. Built the end-to-end pipeline: image workflows, AI processing, rendering integration. Market Intelligence Pipeline : Python data pipeline surfacing pricing and inventory signals across marketplaces for automated sourcing decisions. Brand Protection System: Automated data acquisition tool paired with an AI-driven analysis dashboard for continuous competitive monitoring. Tech Stack Python • FastAPI • Flask • Django • Ruby on Rails • N8N • Zapier • React • Next.js • Node.js • Express • MongoDB • OpenAI API • Claude API • PostgreSQL • AWS • REST APIs • Selenium • Scrapy • Playwright How I Work I start by understanding the business problem before touching the stack — what the automation needs to solve, what the AI feature needs to do for the user, what "done" looks like for the MVP you're asking for. I scope clearly, flag risks early, and build for where your product is going in six months, not just this week's ticket. Why Clients Hire Me Clients consistently cite fast communication, daily progress updates, and code that doesn't need a second developer to fix it later. On more than one project, I've flagged a requested feature that would have caused problems at scale and proposed an alternative before writing a line of code. Let's Build If you need a Python developer who can integrate AI meaningfully, automate a manual process, or build your SaaS MVP end to end, let's talk about what you're building.

I help healthcare organizations and startups build secure, interoperable, and user-friendly digital health solutions that improve patient outcomes and streamline operations. Since 2005, I’ve proudly served the U.S. healthcare industry, developing certified and compliant systems such as EHRs, EMRs, Telehealth apps, Patient Portals, FHIR APIs, and HIPAA-secure cloud solutions. With 23+ years of full-stack experience in .NET Core, C#, ReactJS, Azure, Android, and iOS, I deliver FHIR-enabled, HL7-integrated, and Meaningful Use Stage 2 & 3 (MU3/ONC) compliant applications that scale efficiently and meet U.S. regulatory standards. 🩺 Core Expertise EMR / EHR / PHR / Patient Portal Development FHIR R4 / HL7 / CCDA / ONC / MU3 / HIPAA / HITECH Compliance SureScripts & LabCorp Integration (eRx & Lab Workflows) Telehealth / RPM (Remote Patient Monitoring) Solutions Azure Cloud & Multi-Tenant SaaS Architecture PACS & Imaging Integration Key Projects & Results - WebEDoctor EMR – Led MU3 & ONC certification; implemented FHIR R4 and patient access APIs. - ChoiceOne EMR – Delivered interoperability and eRx modules, enabling compliance certification. - AccessMyRecords Portal & KIOSK – Built from scratch to streamline patient self-registration and engagement. - CureAccess EMR + Patient Portal – Architected a FHIR-based EMR/PHR ecosystem connecting patients and providers in real time. - SaaS Telemedicine Platform – Designed and developed a multi-tenant, HIPAA-compliant virtual care system. - CSSD Management System – Increased hospital sterilization compliance and audit efficiency by 40% through automation. - Independent Medical Review App (IMR) – Created a full end-to-end workflow automation system from concept to deployment. Why Clients Choose Me - Deep expertise in Health IT interoperability & compliance - Proven results with FHIR, HL7, and ONC-certified EHRs - 23+ years of hands-on full-stack development (.NET Core, ReactJS, Azure) - Transparent communication, reliable delivery, and complete documentation - U.S. healthcare domain understanding — clinical, lab, and pharmacy workflows Client Impact “Talha quickly understood our compliance and interoperability needs, built a FHIR-compliant EMR module, and helped us achieve ONC certification ahead of schedule.” If you’re building or modernizing a healthcare platform, FHIR API, or Telehealth solution, let’s connect. I’ll help you turn your vision into a compliant, efficient, and scalable product that clinicians and patients love to use

I provide senior-level guidance on building, scaling, and optimizing modern web applications, SaaS platforms, MVPs, dashboards, admin panels, and AI-powered products. I have 6 years of Full Stack development experience, I help founders, startups, and development teams make the right technical decisions, avoid costly mistakes, and accelerate product delivery. 🚀 Full-Stack Expertise I Deliver MVP Development & Launch Readiness React.js & Next.js Frontend Systems Node.js / Express / MongoDB APIs / FastAPI Backends Stripe, Lemonway, Hubtel Integrations Admin Panels & CRM Dashboards Scalable SaaS Architecture Third-party Integrations & Automation App Optimization & Refactors KYC Flows, Auth, Multi-Tenancy, GDPR Compliance Project Rescue & Tech Debt Reduction AI App Development MVP Planning & Technical Roadmaps API Design (REST & GraphQL) Database Design & Optimization Authentication & Authorization AWS, Vercel & Cloud Infrastructure Performance Optimization & Scalability AI Integrations (OpenAI, Claude, RAG, LangChain) 📌Technologies I use: Frontend: React, Next.js, TypeScript, Tailwind CSS, React Query Backend: Node.js, Express, FastAPI, REST APIs, GraphQL Databases: PostgreSQL, MongoDB, MySQL AI: OpenAI, Claude, LangChain, RAG, Vector Databases Cloud: AWS, Docker, Vercel, CI/CD Payments: Stripe, Subscription Systems, Payment Gateway Integrations 🏥 Industries I’ve Helped Build In: SaaS & Startups Fintech & Insurtech AI, DeepTech & Automation Crypto, Web3 & Blockchain HealthTech & Digital Health Real Estate & PropTech E-commerce, Retail & Marketplaces Logistics, Supply Chain & Fleet LegalTech & Compliance Social Platforms & Non-Profits EdTech & E-Learning FoodTech & Hospitality CleanTech & Energy GovTech & Public Sector My Approach Understand Requirements → Review Architecture → Identify Risks → Recommend Solutions → Create Actionable Roadmap Let’s turn your vision into reality, together. 🤝 Keywords: Full Stack Developer • Senior Full-Stack Engineer • React Developer • Next.js Expert • Node.js Developer • AI Web Developer • TypeScript Engineer • Frontend Developer • Backend Developer • Full Stack Consultant • SaaS MVP Developer • Dedicated Programmer • Web Application Developer • Solution Architect Fintech & Payments: Stripe Integration • Payment Gateway Integration • Subscription SaaS • Stripe Billing • MX API • Banking Data Integration • Payroll Management System • Ledger Tracking • Transaction Systems • KYC Flows • Lemonway • Hubtel Integration • AWS Lambda • Amazon Web Services • AWS RDS • Vercel Deployment • Docker Containers • Serverless Architecture • CI/CD Pipelines • Cloud Infrastructure • Database Optimization • System Architecture • Software Architecture • Data Encryption • RBAC • Multi-Tenancy • GDPR Compliance • Secure Authentication • MVP Development • SaaS Platform • B2B SaaS • Minimum Viable Product • Dashboard & Admin Panels • CRM Dashboards • Web Application • Startup MVP • Figma to React • Codebase Cleanup • Code Review • Technical Audit • Project Rescue • Tech Debt Reduction • App Optimization • App Refactoring • Performance Optimization • Scalable Systems • Technical Roadmap • Development Team Guidance

🏆 Top Rated ✔ Full-Stack Developer ✔ Excellent communication 🏆 ⭐[ Well versed with following Technologies ]: ✔ .NET (10, 8, 7, 6) Framework| .NET MVC |.NET Core | Entity Framework | Azure | SQL | Blazor | MAUI | Dapper | Microservices | APi Integration, GraphQL | RestAPI | Javascript | Jquery | Angular | Vue | React | HTML | CSS ✔ I am a Full-stack developer and experienced with frontend & backend both. Solid hands-on Web Application Development, Software Development, Website Development, API Integration, etc. I have worked in all phases of project development such as Business requirement Analysis, Architecture Design, Database Design, Development, Testing, Debugging, Optimization, Deployment, Maintenance ✔ [ I have worked on many domains. A few major domains are listed below]: - Event Management - Flight Scheduling - Supply Chain Management - Health Care - Fintech - Point of Sale - eCommerce Solutions - CRM - Compliance Management - Inventory Management - Marketplace - B2B and B2C trading platform - Mobile Marketing - Dashboard/ Reporting & Analysis - Business Application - Workflow Application