Hi, I am Adnan, a Senior Full Stack Developer with 5+ years of experience in creating and delivering user-centric applications and solutions. Worked with different front-end, and back-end frameworks/libraries. I have engineered modern applications using the following tech stacks:- ✅ Frontend - HTML, CSS, SCSS, Tailwind CSS, Bootstrap, ReactJS, NextJS, Angular JS, VueJS, WebSockets, Webpack, Babel, Eslint, SonarQube, Material UI, Ant design, Chakra UI, HeadlessUI, Redux, Redux thunk, Redux Saga, Recoil, Zustand , Jotai, Redux toolkit, RTK query, React-Query, Graphql-request, Apollo, Urql, etc.. ✅ Backend - NodeJS, Express, GraphQL, TypeScript, JavaScript, NestJS, Firebase, Strapi. ✅ Mobile: React-Native. ✅ CMS: Strapi, Medusa JS, Adobe Experience Manager (AEM). ✅ Database - MySQL, Firebase, SQLite, PostgreSQL, MongoDB. ✅ Payment Providers - PayPal, Hyperpay, Stripe. ✅ Version Control - Git, Gitflow, SVN, smart GIT, Bitbucket, Gitlab, Github. ✅ Tools - VS Code, Visual Studio, IntelliJ IDEA, Puppeteer, Handlebars. ✅ Creating REST Services and APIs using Swagger specifications. ✅ Collaboration Tools - JIRA, ASANA, Azure, JIRA Confluence, JIRA Story Points, Slack, Trello. ✅ Keycloak SSO. ✅ Cloud services - Firebase, Heroku, Vercel, Netlify, Railway, AWS, AWS Cognito, DigitalOcean

I’m a results-driven Full-Stack Developer with experience building end-to-end web applications using React, Node.js, Express, Python, and MongoDB. I focus on developing systems that are stable, scalable, and easy to extend, whether it’s a startup MVP or a production-ready application. I enjoy working across the entire stack — from crafting intuitive user interfaces to designing efficient backend logic and APIs. Every solution I deliver is built to be: ⚡ Fast and performance-focused 📱 Responsive across all devices 🔐 Secure and reliable 🧩 Easy to maintain and scale 🔧 How I Add Value 🔹 Develop full-stack web applications with modern JavaScript and Python 🔹 Build robust REST APIs using Node.js (Express) and Python 🔹 Design clean database structures with MongoDB 🔹 Connect frontend and backend seamlessly 🔹 Implement authentication, authorization, and data validation 🔹 Improve backend performance and application stability 🔹 Maintain clear, modular, and readable codebases 🛠 Technologies I Work With ⚙️ React.js, Node.js, Express.js ⚙️ Python for backend services & logic ⚙️ MongoDB ⚙️ REST APIs & backend architecture ⚙️ Git & version control I value clear communication, clean architecture, and on-time delivery. My goal is to build full-stack solutions that not only work well today but are ready to grow with your business. 📩 Let’s collaborate to build a reliable and scalable web application.

Ladies & gentlemen, I am a full-stack developer with years of experience in IT, during this time I develop, host, and manage complex web-based software applications. I would be glad to improve the efficiency of your work processes by implementing qualified tools in your current or future system. I have extensive experience in developing internal software with various features and functions (costing, calculations, automation, conversion, etc.) with the possibility of monetization depending on your plans. For complex tasks and calculation-intense problems, I use: - PHP, Laravel, Symfony, Yii2, Zend, Node.js, Next.js - JavaScript frameworks: JQuery, Vue.js, React.js, - Databases, SQL & NoSQL: MySQL, PostgreSQL, Elastic Search, MongoDB I believe in concepts such as communication, accountability, transparency, flexibility, and most importantly, results since my slogan is - '' Do everything 100% or don't bother with it at all'' Best Regards Serhii keywords to find me: • End-to-End Software Development for Startups • Minimum Viable Product (MVP) development • Business Automation • Improvement and customization of existing projects • SAAS solutions • E-commerce • Marketplaces • Social Networks • CRM, ERP, HRM, HMS systems • GPT-3/4, ML integration • Landing Page development • AWS • Digitalocean • Google Cloud Platform • Linode • Custom • Vue.js (Vue, VueJS), Vuetify, Nuxt • React (ReactJS, React.js) • Angular (AngularJS, Angular.js) • Alpine.js • TypeScript (Type Script) • Tailwind • SCSS / LESS • PHP • Laravel • Lumen • Yii, Yii2 • Symfony • CakePHP • Node.js • Adonis.js • PostgreSQL • MySQL (MariaDB) • MongoDB • Firebase • Redis • Elasticsearch • Solr • Amazon Redshift • AWS SQS • RabbitMQ • Laravel Horizon • Apache Kafka • Sentry.io • Snyk • New Relic • Kibana • Opsgene • Node.js • Next.js • Much more

I will turn your complex Figma designs into pixel-perfect, production-ready Angular/React applications—delivered faster using AI-assisted workflows. By leveraging advanced AI tools for code generation, debugging, and testing, I cut down development time without sacrificing quality. You get enterprise-grade frontend architecture in a fraction of the time.While Angular is my primary specialty, I am also highly proficient in React. This dual capability allows me to adapt to existing codebases, collaborate with diverse teams, or handle framework migrations seamlessly.

Most businesses spend weeks searching for a developer who can actually deliver a working AI product not just talk about models and frameworks. I build production-ready AI applications, autonomous agents, and full-stack web apps that solve real business problems, not demos that fall apart after handoff. With 6+ years in software development and deep specialization in AI engineering, I've built everything from RAG-based knowledge systems and multi-agent automation pipelines to AI SaaS platforms and voice AI agents. If it involves LLMs, Python, or full-stack development — I've built it and shipped it. WHAT I DELIVER (Services) : ► AI CHATBOTS & CONVERSATIONAL AI Custom chatbots using OpenAI GPT-4, ChatGPT API, LLaMA 3, and Mistral. Integrated into websites, apps, and messaging platforms with context memory and multi-turn conversations. ► AI AGENT DEVELOPMENT : Autonomous multi-agent systems with LangChain, CrewAI, AutoGen, and LlamaIndex. Agents that research, process data, make decisions, and execute workflows without constant human oversight. ► RAG PIPELINES & KNOWLEDGE SYSTEMS : Retrieval-Augmented Generation with vector databases (Pinecone, Weaviate, FAISS, ChromaDB). Enterprise search, document Q&A, and AI knowledge bases with source attribution. ► LLM FINE-TUNING & ALIGNMENT : Custom model training using LoRA, QLoRA, PEFT. RLHF and DPO alignment for domain-specific accuracy and brand-safe outputs. ► VOICE AI AGENTS : Speech-to-text and text-to-speech integration. Voice assistants for customer support, operations, and telephony with real-time response handling. ► AI SAAS PRODUCT DEVELOPMENT : End-to-end product build: system architecture, API design, React/Node frontend, Python backend, deployment. From MVP to scalable production platform. ► CUSTOM GPT & OPENAI INTEGRATION : GPT-4, GPT-4o, and Assistant API integration into existing platforms. Function calling, structured outputs, and enterprise-grade prompt engineering. ► FULL-STACK WEB APPLICATIONS : React.js, Node.js, Next.js, MongoDB, REST/GraphQL APIs. Real-time apps, dashboards, marketplaces, and automation platforms. ► PYTHON BACKEND & AUTOMATION : FastAPI, Flask, Django APIs. Web scraping, data mining, n8n workflows, Telegram bots, trading bots, and Binance API automation. ► AI DEPLOYMENT & INFRASTRUCTURE : Production deployment on AWS, RunPod, DigitalOcean. Docker containerization, CI/CD pipelines, GPU optimization, and scaling strategy. PROVEN RESULTS (Why Clients Trust Me) : ✓ $100,000+ earned on Upwork across 233 successful contracts ✓ 100% Job Success Score — every client satisfied, every project delivered ✓ 7,305+ hours of verified development work ✓ Top Rated status — consistently high feedback and on-time delivery ✓ Repeat clients who return for additional AI features and scaling My clients are startup founders, product teams, and businesses who need AI built properly with clean architecture, real documentation, and zero handholding after delivery. I don't disappear after launch. I make sure it works in production the way it worked in development. HOW I WORK : 1. REQUIREMENTS — I listen first. Understanding your business goal is more important than the tech stack. 2. ARCHITECTURE — I design the system before writing code. Scalable, documented, and production-ready. 3. BUILD — Weekly updates, transparent progress, demo-ready milestones. 4. DELIVERY — Deployed, tested, monitored, with 30 days post-launch support. READY TO BUILD? If you need an AI agent, a RAG system, a chatbot, a full-stack AI app, or a Python automation tool — send me your requirements. I respond within hours with exactly how I'd build it and how long it will take. Let's turn your AI idea into a working product. Thanks, — Talwinder | Full-Stack Developer, MERN Stack, RAG, React/Node, AI-Powered SaaS, AI-Powered Healthcare SaaS Platform | SaaS Builder, SaaS Developer, Full-Stack Developer, MERN Stack, Next.js Developer, React.js Developer, Node.js Developer, AI Model Integration, AI Developer, OpenAI, GPT, Chatbot Integration, Task Automation, API Integration, Stripe Integration, Payment Gateway, MongoDB, PostgreSQL, Tailwind CSS, Shadcn/UI, MVP Developer, Startup, Web Application Developer | Full Stack Developer, SaaS Developer, Marketplace Developer, Custom Web Application Developer, Startup MVP Developer, Product Engineer, Platform Developer, CRM Developer, Dashboard Developer, Workflow Automation, Business Systems, API Development, Multi-Tenant SaaS, Scalable Web Applications

Having a decade of mastery in 🔸 Front-end Development: JavaScript, React.js, Next.js, HTML5, CSS3, Bootstrap, Tailwind CSS, jQuery 🔸 Back-end Development: Node.js, PHP, MySQL, SQL Server, MongoDB, Redis, Apps Script, Ruby 🔸 CMS & Frameworks: WordPress, Joomla, Codeigniter, Laravel, Express.js, etc 🔸 Data Scraping & Automation: Web scraping, Data extraction, API scraping, Puppeteer, Playwright 🔸 Google Apps Script, Google Spreadsheets API, Google Sheets 🔸 Cloud Platforms & Services: Google Cloud Platform (GCP), Firebase, Amazon Web Services (AWS) Result oriented developer, able to quickly grasp new technologies. I love to help you solve your web related problems: building, fixing, migrating, customizing, optimizing.

I'm ambitious professional with huge background in web development. I enjoy software development and provide business solutions to my clients with using innovative thinking and proven techniques. I can work on your existing websites and also can build for you from very start to an awesome end. Knowledge of HTML5/CSS3, Javascript, Jquery. Knowledge of Bootstrap. Advanced knowledge of PHP. Strong understanding of OOP principles. Excellent knowledge of Laravel framework. Ability to work with other PHP frameworks. Strong knowledge of SQL (MySQL, SQLite, MsSQL) and NoSQL (MongoDB, Redis) databases, database design, complex queries, requests/data optimizations etc. Excellent knowledge of Angular. Excellent knowledge of Vue.js. Excellent knowledge of React. Excellent knowledge of ReactNative. Experience with NodeJS. Shopify, WordPress. Experience with integrating various payment methods. Ability to work with various APIs, such as Active Campaign, Klaviyo, Mailgun, AWS, Aweber, Ebay, Maildrill, etc. Ability to write clear and well documented code. Knowledge of Apache and Nginx. Knowledge of LINUX. Version Control (SVN, GIT). Other web issues (SSL, AJAX, JSON, XML, SOAP, CURL, etc.). Project Tracking (Asana, Trello, YouTrack, Jira, Atlassians and others). Ability to create specs(documentation) for project , and manage the whole development process. You can expect professional attitude. My ability to work is 8 hrs/day, clean code, optimal solutions and lots of ideas regarding your site/service etc. Thank you.

Struggling with a messy Vue/Nuxt codebase or a UI that doesn’t match your design? I turn it into a clean, production-ready frontend your team can actually rely on. Creating reliable, high-performance web applications designed for long-term scalability and smooth user experience. Projects don’t usually fail because of ideas—they fail in execution: * "Designs that look right in Figma, but break in implementation"* * “Features that work… but become harder to maintain with every update“ * “Deadlines getting closer while the frontend isn’t ready to support real users“ How the frontend holds up in real use: * Design consistency maintained from mockup to production * Components structured to scale as features grow * Reliable API integration that avoids unexpected edge-case issues * Performance that supports real users, not just ideal scenarios * Fast iteration cycles without accumulating technical debt ⚡️ What Clients Are Saying: ✅ "Andri did an excellent job building a Vue.js app from scratch for us..."
 ✅ "Thanks to Andri, our dashboard looks exactly as per design and works perfectly!" 
✅ "Very reliable and easy to communicate with. Delivered ahead of schedule."
 ✅ "He worked faster than the timeline provided and fixed every issue we raised." 🧠 What working together typically looks like: * Requirements stay clear and aligned throughout the project, reducing back-and-forth and misunderstandings * Scope and limitations are addressed early, avoiding surprises later in development *Issues are handled as part of the process, not postponed or ignored * Code remains structured and maintainable, making future changes easier to implement * Feedback is reflected quickly, keeping progress steady without unnecessary delays 🛠️ Built with a focused, modern frontend stack: * Vue.js and Nuxt for scalable, production-ready applications * Clean UI systems using TailwindCSS and component-based architecture * Structured state management for predictable data flow * Reliable API integration for stable and consistent functionality * Responsive, accessible interfaces that work across devices -Includes experience with Vuex, Pinia, and modern tooling where needed- 🧩 Experience across real product environments: Frontends built for startups and SaaS teams where requirements evolve, timelines shift, and the product needs to keep moving without breaking structure. Work typically involves dashboards, internal tools, and data-driven interfaces that need to remain stable as complexity grows. 📊 Proven across multiple projects: * "5+ years working on production frontend applications" * "30+ Vue/Nuxt projects across dashboards and web apps" * "Consistent delivery across a variety of project scopes and timelines" * "Ongoing collaborations with clients beyond initial projects" ✅ Ready to Move Fast? Let’s chat. Click the green “Invite” button, share your requirements, and I’ll respond within a few hours. I’m available during US working hours and happy to jump on a quick call to align. 📅 Last updated: April 2026

Hello! I'm Stephen Carruthers and passionate about building websites and designing user interfaces to bring software to life. However, my true passion lies not only in solving problems, but providing the best possible solutions through cutting-edge technology. This mentality has enabled me to gain invaluable experiences skills, such as strategic thinking, effective communication, and comprehensive project development. I've played pivotal roles in designing, developing, and delivering exceptional desktop and web-based products. With extensive full stack experience, I specialize in technologies like PHP, JavaScript, TypeScript, WordPress, HubSpot, C#, and ASP.NET. I've extensive experience with concepts such as relational and document store databases, REST APIs, cloud engineering (AWS), CI/CD, and much more. If you're looking for a developer who merely closes tickets, there are plenty to choose from. However, if you want a top-tier problem solver and talented developer who can drive your projects to success, you have found the right person. Let's chat and see how I can help.

Mobile App Developer | Flutter Developer | React Native Developer | iOS & Android Apps | AI-Powered MVPs I am a Mobile App Developer with 12+ years of experience building high-quality mobile applications for startups, SaaS companies, enterprises, and growing businesses worldwide. As a Mobile App Developer, I have successfully delivered 500+ projects ranging from MVPs and startup products to large-scale applications used by thousands of users. My expertise includes Flutter, React Native, iOS, Android, Firebase, Node.js, AI integrations, and scalable cloud-based architectures. Whether you need a new mobile application, MVP development, app modernization, AI-powered features, or long-term product support, I can help turn your idea into a successful product. 🚀 What I Can Help You Build • Cross-platform mobile applications using Flutter and React Native • iOS and Android applications with native-like performance • SaaS platforms and subscription-based mobile products • AI-powered applications using OpenAI and Gemini • Marketplace and on-demand service apps • Healthcare, Fintech, E-commerce, Logistics, and Social Networking applications • MVPs for startups looking to launch quickly and validate ideas • Scalable backend systems using Firebase, Node.js, PostgreSQL, MongoDB, and AWS As a Mobile App Developer, I focus not only on writing clean code but also on creating products that are scalable, maintainable, and aligned with business goals. 🧠 AI-Powered Mobile Applications As an AI-focused Mobile App Developer, I help businesses integrate practical AI features that improve user experience and automate manual processes. Examples include: • OpenAI and Gemini integrations • AI chat assistants and customer support automation • Content generation and summarization • AI-powered recommendations and personalization • Workflow automation and intelligent business tools • AI agents for scheduling, data processing, and productivity I believe AI should solve real business problems and deliver measurable value rather than being added simply as a trend. 🛠 Technical Expertise Mobile Development: Flutter, React Native, Swift, Kotlin, Dart, JavaScript, TypeScript Backend & Cloud: Firebase, Node.js, AWS, PostgreSQL, MongoDB, REST APIs, GraphQL AI & Automation: OpenAI API, Gemini API, Vector Databases, AI Agents, Prompt Engineering Design & Product: Figma, Postman, Jira, Agile Development, Automated Testing 📈 Why Clients Work With Me ✔ 500+ Successfully Delivered Projects ✔ 12+ Years of Mobile Development Experience ✔ Flutter & React Native Specialist ✔ MVP to Enterprise-Level Product Development ✔ Strong Communication and Transparent Process ✔ Long-Term Product Support and Scaling Expertise As a Mobile App Developer, I understand that every project is different. Some clients need a fast MVP to validate an idea, while others need a reliable development partner to scale an existing product. My goal is to provide solutions that support your business objectives and help you grow. If you are looking for a Mobile App Developer who combines strong technical expertise, startup experience, and practical AI integration, I would be happy to discuss your project. 📩 Send me a message and let's discuss how we can bring your mobile app idea to life.