👋 Who I Am I am a Full Stack Developer & System Architect with 13+ years of experience delivering scalable, user-friendly, and business-focused software solutions. I have worked with clients worldwide, building everything from SaaS platforms and admin dashboards to multi-client portals and data migration systems. I hold a Top Rated Plus badge on Upwork, earned by consistently delivering high-quality work and long-term results. 💡 Core Capabilities 🔹 System Architecture & Design Translating business needs into secure, scalable technical solutions 🔹 Custom Development PHP/MySQL (13+ yrs), Vanilla JavaScript, APIs, Integrations 🔹 Retool Expertise Dashboards, client portals, employee management systems, and data tools with read/write capability and role-based permissions 🔹 Data Migration & Automation Migrating 200k+ records securely Converting binary data to JSON, ensuring integrity and compliance (PII/PHI) Workflow automation using APIs, Zapier, Make 🔹 Database Proficiency PostgreSQL, MySQL, Supabase, Snowflake or any 🔹 Leadership & Team Management Experience leading dev teams Can assemble and manage a new team based on project needs ✅ Why Work With Me ✔ Top Rated Plus on Upwork – trusted by clients for quality & reliability ✔ Hands-on + Strategic – I design systems, not just code features ✔ Flexible Technology Skills – can adapt to any stack required ✔ Timezone Flexibility – based in IST, but comfortable working PST/EST/EU hours ✔ Clear Communication – explaining technical details in simple, client-friendly terms 🚀 Selected Experience SaaS Platform (South Africa) – built and scaled modules for inventory, accounting, and costing; system still running successfully today Multi-Client Portal – designed and developed portals in PHP/MySQL and Retool with role-based permissions and integrated dashboards Retool Dashboards – created finance, operations, and HR dashboards, cutting reporting time by 60% Insurance Data Migration – managed migration of 223,000+ records (CSV + JSON), ensuring secure handling and client satisfaction 🎯 My Commitment I am passionate about building systems that make businesses run smarter, faster, and more efficiently. Whether you need a Retool dashboard, client portal, SaaS platform, or complex data migration, I can deliver end-to-end solutions with clarity, reliability, and long-term vision. 📩 Let’s connect — I recommend a quick talk before you hire anyone. I’ll show you exactly how I can help turn your vision into reality.

I am a solution-focused and seasoned software engineering expert with over 10 years of comprehensive experience in building scalable, high-performance applications and digital platforms. My expertise spans across PHP development and all major open-source PHP frameworks, including Laravel, Yii, Zend, Symfony, CakePHP, and CodeIgniter. I have successfully delivered projects across diverse categories, such as: B2B marketplaces (similar to Alibaba) Multi-vendor marketplaces (like Chrono24, Etsy) Coupon and cashback platforms Food delivery and booking systems Affiliate marketing platforms (Amazon, CJ, Awin, Webgains, etc.) Classifieds and price comparison websites I also bring strong technical skills in full-text search engines (SphinxSearch, Sphinx) and caching technologies (Redis, Memcached). In addition to traditional software engineering, I am highly experienced in Prompt Engineering and Vibe Coding, with deep familiarity in AI-powered workflows, chatbot development, and integration of tools like OpenAI’s ChatGPT API. I leverage modern coding assistants and IDE enhancements, including Windsurf, to streamline development and optimize team productivity. This blend of software engineering, AI integration, and modern coding practices enables me to design innovative, future-ready solutions that bridge the gap between traditional development and next-generation technologies.

I specialize in building AI SaaS platforms, LLM applications, automation systems, and high-performance web platforms using modern technologies like OpenAI, LangChain, Python, Node.js, and React. With 10+ years of development experience, I help startups and companies turn ideas into production-ready AI products. What I Can Build For You ✅ AI Chatbots (GPT / Claude / LLaMA) ✅ RAG Systems & AI Knowledge Bases ✅ AI SaaS Platforms ✅ Automation Systems & AI Workflows ✅ Intelligent Dashboards & Analytics ✅ Custom APIs & Scalable Backend Systems ✅ Full-Stack Web Applications Tech Stack AI / LLM: OpenAI, GPT-4, Claude, LangChain, LlamaIndex, Vector Databases Backend: Python (FastAPI, Django), Node.js (NestJS, Express) Frontend: React, Next.js, TypeScript Cloud: AWS, Docker, CI/CD, Serverless Why Clients Work With Me ✔ AI + Full-Stack expertise in one developer ✔ Scalable SaaS architecture ✔ Clean, maintainable code ✔ Fast communication & reliable delivery I focus on building AI systems that work in production, not just demos. If you're planning to build an AI-powered SaaS platform, automation system, or intelligent web application, let's discuss your project. JP Tiwari

25+ years Linux System Administrator Native Ukrainian. Living in Slovenia. Open for good offers. I know *nix very well. Just ask me

Top-rated full stack developer with 100% Job Success and $20k+ earned on Upwork. Specializing in React, Next.js, and Laravel. I've worked across SaaS platforms, product dashboards, API-driven systems, and frontend architecture. Mostly alongside startup teams and agencies who need reliable execution, not hand-holding. What I typically work on: ✔ React / Next.js web application development ✔ SaaS product builds and feature iteration ✔ Laravel backend development and API integration ✔ Dashboards, admin panels, and internal tool ✔ Frontend cleanup, enhancement, and optimization ✔ Stepping into codebases and improving them ✔ Bug fixing, performance improvements, and maintenance ✔ Database design and scalable backend workflows Why clients hire me: ✔ Strong frontend + backend execution ✔ Clean communication and dependable delivery ✔ Fast onboarding into existing projects ✔ Practical solutions focused on business results Need a developer who can handle both frontend and backend without hand-holding? Send me the project details and I'll tell you exactly how I'd approach it.

I help Shopify brands build and scale high-performing ecommerce products through custom themes, apps, and advanced integrations. With strong expertise in Shopify (Themes & Apps) and full-stack development (React / Next.js), I deliver scalable, fast, and conversion-focused solutions tailored to real business needs. 🛍️ Shopify Development (Core Focus) • Custom Shopify Themes (Online Store 2.0, Dawn, performance & CRO-focused) • Shopify App Development (public & private apps) • Shopify API integrations (Admin API, Storefront API, Webhooks) • Checkout Extensibility & Shopify Functions • Subscription, payment, and shipping integrations • Headless Shopify (Hydrogen / custom frontend) ⚙️ Full-Stack Development (Advanced Cases) • React / Next.js applications for ecommerce • Custom dashboards & internal tools • Complex API integrations (REST & GraphQL) • Scalable backend systems and automation workflows 🧠 What I focus on: ✔️ Clean, scalable, and maintainable architecture ✔️ High performance and fast-loading storefronts ✔️ Conversion-focused UX (not just development) ✔️ Business-oriented solutions, not just code 🛠️ Tech Stack: Shopify & Shopify Plus Liquid, JavaScript (ES6+), HTML5, CSS3 React / Next.js REST & GraphQL APIs Shopify CLI, App Bridge, Polaris Webhooks, Shopify Functions Git 🎯 Typical solutions I deliver: • Custom Shopify storefronts and theme architecture • Shopify apps for automation and integrations • Advanced cart & checkout logic • Post-purchase upsell flows • Subscription and recurring payment systems • Shopify + external system integrations 💬 If you’re looking for a Shopify expert who can go beyond themes and handle complex, full-stack challenges — let’s talk. Updated: 1st July 2026

**𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫 | 𝐀𝐈 𝐒𝐚𝐚𝐒, 𝐏𝐲𝐭𝐡𝐨𝐧, 𝐃𝐣𝐚𝐧𝐠𝐨, 𝐍𝐨𝐝𝐞.𝐣𝐬, 𝐑𝐞𝐚𝐜𝐭, 𝐍𝐞𝐱𝐭.𝐣𝐬** Most developers ship features. I build production systems that scale, handle real traffic, and support serious business operations. 𝐈’𝐦 𝐃𝐢𝐧𝐞𝐬𝐡, 𝐚 𝐒𝐞𝐧𝐢𝐨𝐫 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫 𝐚𝐧𝐝 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭 𝐬𝐩𝐞𝐜𝐢𝐚𝐥𝐢𝐳𝐢𝐧𝐠 𝐢𝐧 𝐛𝐮𝐢𝐥𝐝𝐢𝐧𝐠 𝐀𝐈-𝐧𝐚𝐭𝐢𝐯𝐞 𝐒𝐚𝐚𝐒 𝐩𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬, 𝐬𝐜𝐚𝐥𝐚𝐛𝐥𝐞 𝐛𝐚𝐜𝐤𝐞𝐧𝐝 𝐬𝐲𝐬𝐭𝐞𝐦𝐬, 𝐚𝐧𝐝 𝐡𝐢𝐠𝐡-𝐩𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐰𝐞𝐛 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬. I focus on clean architecture, long-term maintainability, and systems that perform under pressure. I don’t say “almost done” for weeks I build, ship, and communicate transparently from day one. I’ve worked on systems handling **millions of records, high-throughput workflows, and AI-powered data platforms** that turn complex business logic into simple, usable products. 🚀𝐂𝐨𝐫𝐞 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 * **Full-Stack SaaS Development** Building scalable applications using Next.js, React, TypeScript, Node.js, and Python (Django, FastAPI). * **AI & LLM Engineering (AI SaaS)** RAG systems, LLM integrations, vector databases (Qdrant, pgvector), and intelligent automation pipelines using OpenAI & Gemini APIs. * **Backend & System Architecture** Designing secure, modular, multi-tenant architectures with PostgreSQL, caching layers, and optimized APIs for scale. * **Cloud & DevOps** AWS-based deployments (Lambda, EC2, S3), Dockerized environments, and CI/CD pipelines for production-grade delivery. 💻𝐒𝐞𝐥𝐞𝐜𝐭𝐞𝐝 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬 **🤖 AI Data Observability Platform (Quanta)** Built a natural-language-to-database query system enabling enterprise users to explore and visualize data instantly. * Full-stack AI architecture with RAG-based querying * Real-time dashboards handling large-scale datasets * Stack: Next.js · TypeScript · Python · Vector DBs · AWS **🏦 FinTech Automation Platform** High-security multi-tenant system automating loan processing and document workflows. * Reduced processing time by 70% through automation * Designed secure backend architecture and workflow engine * Stack: Next.js · Django · PostgreSQL · JWT · AWS **🚗 Automotive Marketplace Platform** High-scale inventory and lead generation platform handling millions of vehicle records. * Optimized backend for 7M+ records with caching strategies * Built SEO-optimized frontend improving conversion rates * Stack: Next.js · Django · PostgreSQL · Redis · AWS 🛠️ 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤 **Frontend:** React · Next.js · TypeScript · Tailwind CSS **Backend:** Python · Django · FastAPI · Node.js · PostgreSQL **AI/ML:** LLM APIs (OpenAI, Gemini) · RAG · LangChain · Vector DBs **Cloud/DevOps:** AWS · Docker · CI/CD · Serverless Architecture 🤝𝐇𝐨𝐰 𝐈 𝐖𝐨𝐫𝐤 * I take ownership of your product like it’s my own system * Clear, daily communication with full transparency * Clean, scalable, production-ready code from day one * Proactive architecture decisions to avoid future scaling issues * Focus on shipping reliable systems not endless development cycles. Just go to my '𝐏𝐑𝐎𝐅𝐈𝐋𝐄' and send me the job invite. 𝐊𝐞𝐲𝐰𝐨𝐫𝐝𝐬: Full Stack Engineer | AI SaaS, Python, Django, Node.js, React, Next.js | AI SaaS Developer, LLM & RAG Systems, Scalable Backend Architecture, Multi-tenant SaaS, AWS Cloud, PostgreSQL, TypeScript, FastAPI, Node.js APIs, Full Stack Web Development, High-performance Web Applications, Automation, System Design, CI/CD, Docker, Enterprise SaaS Solutions.

I’m a full stack developer, react developer, and web developer helping businesses build, fix, and improve SaaS products, web applications, dashboards, internal tools, and client platforms with react, next.js, node.js, supabase, postgresql, API integration, and AI-powered workflows. As a full stack developer, I work across front end and back end development. As a react developer and next.js developer, I build and improve modern web application interfaces, dashboards, admin panels, and client-facing product flows. As a node.js developer, I work on business logic, API integration, authentication, webhooks, oauth, stripe flows, and product functionality that supports real SaaS and web application use cases. My work often combines react, next.js, node.js, javascript, typescript, supabase, and postgresql inside one product. Clients usually hire me when they need a full stack developer who can do more than isolated tasks. They need a react developer who can work inside a real product, a next.js developer who can improve an existing web application, and a node.js developer who can connect front end and back end logic cleanly. I help build MVPs, improve SaaS products, fix broken web applications, stabilize dashboards, extend internal tools, improve client portals, and support existing codebases that need stronger full stack development. A lot of my work is with react, next.js, and node.js products that already exist but need improvement. That can mean bug fixing, maintenance, stabilization, performance improvement, API integration, dashboard development, admin panel development, auth flow fixes, web application cleanup, SaaS feature delivery, or extending an MVP into a more production-ready SaaS platform. I’m comfortable joining an existing codebase and working as a full stack developer, react developer, next.js developer, or node.js developer depending on what the product needs most. I also work with supabase and postgresql when a SaaS product or web application needs database logic, authentication, real-time functionality, role-based access, or cleaner back end structure. In many projects, react, next.js, node.js, supabase, and postgresql work together as the core stack, and that is a stack I’m comfortable building, fixing, and extending. I regularly work on web application and SaaS development that includes API integration, stripe, oauth, webhooks, dashboards, internal tools, and client-facing product flows. As a react developer, I can help build responsive product UI, dashboard UI, admin interfaces, and front end functionality inside larger web applications. As a next.js developer, I can help with product architecture, page flows, performance, routing, feature delivery, and production-ready SaaS implementation. As a node.js developer, I can help with API integration, back end logic, business workflows, third-party services, and server-side product functionality. As a full stack developer, I can connect all of those layers into one working product. I also work with AI when it supports a real SaaS or web application use case. That includes AI integration with OpenAI or Claude APIs, AI-assisted product features, AI workflows inside dashboards and internal tools, and automation that supports web application, SaaS, or client platform functionality. When useful, I can also support web scraping and automation if it fits the product and strengthens a real business workflow. If you need a full stack developer, react developer, next.js developer, node.js developer, or web developer for a SaaS product, web application, dashboard, internal tool, API integration project, MVP, client portal, supabase app, postgresql-based system, or AI-powered product feature, send me a message and I’ll review your project.

Experienced as a Full Stack Developer for 8+ years. Currently working on building ETL Pipelines and SQL report generation and Infrastructure as Code using terraform. Interested in opportunities that challenge and reward existing skill set. Key Skills  Gained Experience in Working on AWS Platform  Building Pyspark / Pandas ETL AWS Glue jobs or AWS Lambdas  Building Nifi Flows  Generating SQL Reports  Creating Python Flask APIs with SQLAlchemy and Kafka  Deploying Docker containers  Enhance Midwich SaaS Monitoring platform with snippets built using Python to interface with REST /SOAP APIs of leading Audio Visual Vendor Equipment , ITSM Cloud Providers and Microsoft Azure.  Custom API Development using FLASK and DJANGO.  Experience Working on Full Stack Web Development in Flask and Django  Experience Working on Full Stack Web Development in Laravel/CodeIgniter  Experienced in Python ,PHP, REST API, REACT , SOAP, HTML/CSS , JS,AJAX , C#,LAMP Stack Architecture , JQuery, Bootstrap 5.0.  Experience creating Mobile App backend in Python  Integrate with industry leading ITSM Cloud providers such as Salesforce, ServiceNow, JIRA, ZendDesk, FreshService using REST API.  Knowledge of Full Stack JavaScript Development including Node.js, Express.js, Node Package Manager)  Knowledge of MVC Framework and Code Igniter / Laravel as a Framework  WordPress using Page Builders e.g Divi , Elementor , Beaver Builder , WPBakery , Visual Composer etc  WordPress custom Theme Development and plugin Development.  Version Control Software like Git and SVN using Github and BitBucket for storing the repositories  Relational Database Design and Development in MySQL and PostgreSQL  Experience with project management systems like Basecamp, JIRA, Slack.

Senior Linux Systems Administrator with 20 years of experience delivering robust infrastructure solutions across multiple environments. I specialize in designing, implementing, and maintaining critical systems with a focus on reliability, security, and performance optimization. Core Expertise Load Balancing Solutions: Expert implementation of HTTP load balancing with Apache (including advanced caching mechanisms) and HTTP/TCP load balancing with HAProxy (featuring complex access control lists) Security Implementation: Automated SSL/TLS certificate management with seamless setup and renewal processes Database Administration: Comprehensive management of PostgreSQL and MS SQL Server environments Email Infrastructure: Advanced configuration of inbound/outbound email services using Postfix, Exim, and PowerMTA with DKIM signature implementation DNS Management: Strategic configuration and maintenance of DNS records for optimal routing and availability Messaging Systems: End-to-end RabbitMQ deployment and management Performance Optimization: Kernel-level tuning for application-specific hosts to maximize throughput and minimize latency I excel both as an independent consultant and as part of cross-functional teams, providing creative yet pragmatic solutions to complex infrastructure challenges. Recent projects include mail server implementations, Elasticsearch/Logstash/Kibana (ELK) logging solutions, and custom software integration. I approach each project methodically, prioritizing clear communication and delivering solutions that align precisely with your business requirements.