Senior Full-Stack Developer | React, Next.js, React Native, AI Apps 8+ years of experience. 100+ projects delivered, 10000+ hours on Upwork. Top Rated Plus. I build production-ready web and mobile applications, SaaS platforms, MVPs, and enterprise systems that launch on time and scale without rewrites. Clients include startups, scale-ups, and Fortune 500 companies across fintech, e-commerce, healthcare, and logistics. I don't just write code, I architect systems your team can own, extend, and scale for years. WHAT I BUILD ▸ Full-Stack Web Apps React.js, Next.js, Vue.js, and Nuxt.js custom SaaS platforms, admin dashboards, multi-tenant apps, and customer portals. Pixel-perfect, responsive UI with Tailwind CSS, ShadCN, and Material UI. ▸ Mobile Apps (iOS & Android) Cross-platform apps with React Native and Expo. Full App Store and Google Play deployment, including EAS builds, compliance fixes, and rejection resolution. ▸ Backend & API Development Scalable REST and GraphQL APIs using Node.js, NestJS, and Express.js. JWT authentication, RBAC, microservices, and real-time WebSocket systems. ▸ Database & Cloud Infrastructure PostgreSQL, MySQL, MongoDB, Firebase, Supabase, and Prisma ORM. Deployed on AWS, GCP, Vercel, and Netlify with Docker and CI/CD pipelines. ▸ Payments & Integrations Stripe, PayPal, and Plaid. Webhook handling, OAuth flows, and complex third-party API integrations. WHY CLIENTS HIRE ME AGAIN Production-ready code, not prototypes. Maintainable, documented, tested, and secure from day one. No surprises, honest estimates, upfront scope discussions, and clear change management. Daily updates, you always know where the project stands, regardless of your time zone. Long-term thinking, architecture decisions made in week one still hold up in year three. Full ownership, I proactively flag risks before they become your problems. MY PROCESS 1. Discovery, understand your goals, users, and constraints first 2. Architecture, design for current needs and future scale 3. Development, clean, tested code in milestones with daily updates 4. Launch & Handoff, deployment, full documentation, and knowledge transfer TECH STACK Frontend: React.js, Next.js, Vue.js, Nuxt.js, TypeScript, JavaScript ES6+, Tailwind CSS, ShadCN, Material UI Mobile: React Native, Expo, EAS, iOS & Android deployment Backend: Node.js, NestJS, Express.js, REST API, GraphQL Databases: PostgreSQL, MySQL, MongoDB, Firebase, Supabase, Prisma ORM Cloud & DevOps: AWS, GCP, Vercel, Netlify, Docker, CI/CD Payments: Stripe, PayPal, Plaid, Webhooks Auth: JWT, OAuth, RBAC, NextAuth FREE 30-MINUTE STRATEGY CALL Before we start, let's talk. In 30 minutes you'll get: A technical roadmap for your project An honest budget and timeline estimate Risk and scalability assessment Answers to any technical questions No pitch. No pressure. Just clarity. Send me a message or click Invite to Job, let's build something great. React | React Native | Next.js | Node.js | TypeScript | NestJS | Expo | JavaScript | Vue.js | Nuxt.js | Express.js | REST API | GraphQL | WebSocket | Microservices | JWT | OAuth | RBAC | NextAuth | API Development | Third-Party API Integration | Webhook Integration | PostgreSQL | MongoDB | MySQL | Firebase | Supabase | Prisma ORM | Redis | Elasticsearch | AWS | GCP | Azure | Docker | Kubernetes | CI/CD | Vercel | Netlify | Linux | Nginx | Cloud Architecture | Stripe | PayPal | Plaid | Webhooks | Payment Gateway Integration | Subscription Billing | E-commerce Development | OpenAI API | Claude API | Gemini API | LangChain | RAG | LLM Integration | AI App Development | AI Chatbot | Prompt Engineering | Vector Database | Pinecone | pgvector | AI Automation | SaaS Development | MVP Development | Admin Dashboard | Multi-Tenant App | Enterprise Software | Customer Portal | B2B SaaS | Web App Development | Custom Software Development | Software Architecture | System Design | iOS | Android | App Store | Google Play | EAS Build | EAS Submit | OTA Updates | Cross-Platform Mobile | Mobile App Development | Push Notifications | Deep Linking | Tailwind CSS | ShadCN | Material UI | Responsive Design | UI/UX Implementation | Pixel Perfect Design | Component Library | Full-Stack Development | Frontend Development | Backend Development | Web Development | API Integration | Code Review | Technical Architecture | Database Design | Performance Optimization | Security Best Practices | Fintech | E-commerce | Healthcare | Logistics | EdTech | Real Estate | CRM | ERP | Marketplace | Social Platform | Dashboard & Analytics

🏆 Top Rated Plus | 100% Job Success 🏆 Senior Infrastructure Engineer 🏆 Linux • Networking • Monitoring • Automation • Security Operations • Windows • DevOps I help businesses design, troubleshoot, monitor, secure, and automate production infrastructure environments. With 15+ years of hands-on experience across Linux systems, cloud infrastructure, enterprise networking, monitoring platforms, observability workflows, infrastructure automation, and security operations, I focus on solving complex operational and infrastructure challenges reliably and professionally. ━━━━━━━━━━━━━━━━━━ 💻 Infrastructure & Linux Engineering ━━━━━━━━━━━━━━━━━━ ✅ Linux administration (Ubuntu, Debian, AlmaLinux, CentOS, RedHat) ✅ Infrastructure troubleshooting & operational support ✅ Server hardening & patch management ✅ Performance tuning & infrastructure optimization ✅ Docker & containerized environments ✅ VPN deployments (WireGuard, OpenVPN, IPsec) ✅ DNS troubleshooting & infrastructure migrations ✅ NGINX, Apache, LiteSpeed optimization ✅ MySQL, MariaDB, PostgreSQL administration ✅ Infrastructure monitoring & operational visibility ━━━━━━━━━━━━━━━━━━ 📊 Monitoring & Observability ━━━━━━━━━━━━━━━━━━ ✅ Zabbix deployment, templates, alerting & monitoring ✅ Graylog centralized logging & syslog ingestion ✅ Infrastructure observability workflows ✅ SNMP monitoring & telemetry collection ✅ Infrastructure dashboards & alerting strategies ✅ Log parsing, visibility & operational troubleshooting ✅ Monitoring Linux servers, switches, VPS, cloud environments & infrastructure services ━━━━━━━━━━━━━━━━━━ 🌐 Network Engineering ━━━━━━━━━━━━━━━━━━ ✅ Arista & Cisco Nexus operational support ✅ VLANs, VRFs, routing & switching ✅ WireGuard & site-to-site VPN deployments ✅ A10 Networks & CGNAT operational support ✅ Network troubleshooting & operational visibility ✅ Firewall policy troubleshooting ✅ Infrastructure telemetry & monitoring integrations ✅ Infrastructure cabling & operational deployments ━━━━━━━━━━━━━━━━━━ ☁️ Cloud & Infrastructure Operations ━━━━━━━━━━━━━━━━━━ ✅ AWS infrastructure support ✅ Cloudflare integrations & DNS management ✅ EC2, VPC, RDS, Redis & infrastructure deployments ✅ Amazon SES, SPF, DKIM & DMARC configuration ✅ Email deliverability troubleshooting ✅ Cloud migrations & infrastructure onboarding ✅ Infrastructure automation using Bash & Python ━━━━━━━━━━━━━━━━━━ 🔐 Security Operations ━━━━━━━━━━━━━━━━━━ ✅ Vulnerability remediation support ✅ Security hardening & MFA enforcement ✅ Incident response & operational troubleshooting ✅ Malware cleanup & compromised server handling ✅ Infrastructure security baselines ✅ Operational security reviews ✅ ISO27001 / SOC2 / HIPAA operational support ━━━━━━━━━━━━━━━━━━ 🛠️ Platforms & Technologies ━━━━━━━━━━━━━━━━━━ 💻 Linux: Ubuntu • Debian • AlmaLinux • CentOS • RedHat 🌐 Networking: Arista • Cisco Nexus • WireGuard • VPN • VLAN • VRF • A10 Networks 📊 Monitoring: Zabbix • Graylog • SNMP • Syslog • Telemetry ☁️ Cloud: AWS • Cloudflare • DigitalOcean • Linode • Vultr ⚙️ Automation: Bash • Python • REST APIs • Infrastructure Automation ━━━━━━━━━━━━━━━━━━ 🚀 What You Can Expect ━━━━━━━━━━━━━━━━━━ ✅ Clear communication ✅ Production-safe execution ✅ Strong troubleshooting methodology ✅ Clean documentation ✅ Long-term operational stability ✅ Infrastructure-focused solutions ✅ Reliable and professional support I am comfortable working independently, collaborating with internal teams, troubleshooting production incidents, and supporting long-term infrastructure operations across enterprise and MSP environments.

Most AI SaaS MVPs built with tools like Claude, Cursor or Lovable everything works. Until real users start using it. So, I build AI SaaS platforms and MVPs that are designed to scale from day one, not prototypes that need rebuilding later. 🏆 8+ years of an experience and delivering 50+ SaaS Platform and MVPs 🚀 50+ including 30+ Web App / Web Application builds, 15+ AI-powered SaaS Platform, and 5+ Marketplace Platform. ✅ What you hire me for: 🔧 AI SaaS & MVP development with proper architecture OR Rebuild AI-generated code to production standard. Mainly issues appear in authentication, backend APIs, database design. 🤖 AI agents & automation systems: Custom AI workflows using OpenAI, Claude, Cursor and N8N. I create systems that automate real business operations. 🔗 API & Payment Integrations: Integrating REST APIs and GraphQL APIs connecting third-party services like CRMs, SaaS tools and external platforms & Set up secure payment integrations (Stripe, PayPal and other gateways) with proper transaction handling, webhooks, and database syncing. ⚡Backend architecture & performance optimization: I improve speed and stability by optimizing your database, adding caching, setting up background processing, reducing AI costs and improving your infrastructure ✅ Tech Stack: React.js | Next.js | Node.js | Core PHP| Laravel | TypeScript | JavaScript | REST API | GraphQL | PostgreSQL | MongoDB | Supabase | Redis | AWS | Docker | Vercel | Stripe Integration | OpenAI | Claude | n8n | API Integration | Antigravity | Lovable | Bolt.ai | Wordpress ✅ Experience across products: 🏠 Marketplace / Real Estate Platform 🏥 AI SaaS Platform 🛒 SaaS MVP & Payment Systems 📱 Realtime & Data-Driven Systems 📈 Backend Systems & Workflow Automation 👉 “Most of my work involves building products from scratch or structuring them properly from the beginning.” ✅ While my services suit a broad spectrum of clients, we might not be a good fit if: ❌ You want to work with Stacks other than LAMP or MERN ❌ Your decision hinges mainly on the price tag ❌ You need it ASAP ❌ Your product is associated with the betting or adult entertainment industry ❌ Mutual respect is not important to you Click "Invite" or "Hire" & Let's connect today 🤝

𝐁𝐮𝐢𝐥𝐝 𝐀𝐈 𝐩𝐫𝐨𝐝𝐮𝐜𝐭𝐬 𝟏𝟎× 𝐟𝐚𝐬𝐭𝐞𝐫 𝐰𝐢𝐭𝐡 𝐚 𝐝𝐚𝐭𝐚 𝐝𝐫𝐢𝐯𝐞𝐧 𝐒𝐚𝐚𝐒 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 𝐰𝐡𝐨 𝐨𝐰𝐧𝐬 𝐭𝐡𝐞 𝐨𝐮𝐭𝐜𝐨𝐦𝐞 With 10 + years building data-driven products, 𝐈 𝐭𝐮𝐫𝐧 𝐢𝐝𝐞𝐚𝐬 𝐢𝐧𝐭𝐨 𝐩𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐨𝐧-𝐫𝐞𝐚𝐝𝐲 𝐌𝐕𝐏𝐬 or modernize existing apps into AI-native solutions, embedding intelligence at every layer so you reach market 𝐟𝐚𝐬𝐭𝐞𝐫 and grow revenue. 𝐆𝐞𝐧𝐀𝐈 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠 𝐄𝐝𝐠𝐞 • Deep toolkit: prompting, agentic frameworks, RAG, guardrails, evals, embeddings, vector databases, fine-tuning, graph + LLM patterns, MCP, async pipelines, voice stacks • AI-assisted coding mastery: Copilot, Cursor, Claude Code for rapid authoring, testing, refactoring • Product instincts: craft usable prototypes from high-level concepts without pixel-perfect specs • Continuous learning: constant hands-on projects and active AI community engagement 𝐀𝐈 𝐂𝐚𝐩𝐚𝐛𝐢𝐥𝐢𝐭𝐢𝐞𝐬 • 𝐀𝐈 𝐚𝐠𝐞𝐧𝐭𝐬 𝐚𝐧𝐝 𝐚𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 – streamline support, compliance, finance, supply chain, HR, fraud monitoring with LangChain, LangGraph, n8n • 𝐌𝐮𝐥𝐭𝐢-𝐚𝐠𝐞𝐧𝐭 𝐚𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞𝐬 – coordinate complex workflows autonomously for end-to-end processes • 𝐑𝐀𝐆 𝐚𝐧𝐝 𝐤𝐧𝐨𝐰𝐥𝐞𝐝𝐠𝐞 𝐫𝐞𝐭𝐫𝐢𝐞𝐯𝐚𝐥 – secure chat with private data using GPT-4o, Llama 3, Claude, Gemini, Mistral, custom LLMs • 𝐆𝐞𝐧𝐞𝐫𝐚𝐭𝐢𝐯𝐞 𝐀𝐈 𝐟𝐨𝐫 𝐠𝐫𝐨𝐰𝐭𝐡 – content automation, chatbots, Alexa-like voice experiences, realtime voice agents • 𝐀𝐈-𝐞𝐧𝐚𝐛𝐥𝐞𝐝 𝐬𝐜𝐫𝐚𝐩𝐢𝐧𝐠 𝐚𝐧𝐝 𝐂𝐫𝐚𝐰𝐥𝟒𝐀𝐈 – large-scale data collection and enrichment pipelines • 𝐌𝐚𝐜𝐡𝐢𝐧𝐞 𝐥𝐞𝐚𝐫𝐧𝐢𝐧𝐠 𝐚𝐧𝐝 𝐫𝐞𝐜𝐨𝐦𝐦𝐞𝐧𝐝𝐚𝐭𝐢𝐨𝐧 𝐞𝐧𝐠𝐢𝐧𝐞𝐬 – personalization, targeting, predictive analytics • 𝐆𝐫𝐚𝐩𝐡 𝐝𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬 – knowledge graphs and relationship insights powering advanced queries • 𝐒𝐞𝐜𝐮𝐫𝐞 𝐬𝐜𝐚𝐥𝐚𝐛𝐥𝐞 𝐝𝐞𝐩𝐥𝐨𝐲𝐦𝐞𝐧𝐭 – Python, Django, FastAPI, Docker, Kubernetes, Supabase, Vercel with CI / CD on AWS, Azure, GCP 𝐃𝐚𝐭𝐚 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠 𝐒𝐭𝐚𝐜𝐤 • dbt for tested analytics transformations • Apache Airflow for orchestrating ETL and AI feature pipelines • Kafka and serverless queues for streaming and batch ingestion 𝐂𝐨𝐫𝐞 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬 • CRM and RevOps engineering – lead scoring, SDR automation, real-time enrichment, Salesforce and HubSpot sync • Agent orchestration – LangGraph, Autogen, MCP for tool calling and long-running memory • Stripe billing – subscriptions, usage, metered add-ons, tax handling, zero-downtime migrations • Full-stack SaaS delivery – Next.js and React fronts, Supabase Edge Functions, GraphQL APIs, blue-green deploys • Conversational and medical analytics – HIPAA-ready voice and chat intelligence with pgvector, Qdrant, Pinecone 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐲 𝐒𝐧𝐚𝐩𝐬𝐡𝐨𝐭 Next.js · React · TypeScript · Supabase · Vercel · Django · FastAPI · LangChain · LangGraph · MCP · OpenAI · Kafka · Postgres · Redis · Qdrant · Pinecone · Stripe · dbt · Apache Airflow · Azure AI Search · AWS Lambda · GCP Cloud Run · Terraform · Docker · Kubernetes 𝐒𝐮𝐜𝐜𝐞𝐬𝐬 𝐒𝐭𝐨𝐫𝐢𝐞𝐬 • Lifted lead conversion 43 % with an AI qualification engine • Deployed a HIPAA voice-analytics platform processing 1,000 + calls daily • Unified billing for three SaaS apps with zero churn via Stripe migration • Cut cloud spend 60 % by rebuilding ETL on serverless architecture 𝐖𝐡𝐚𝐭 𝐒𝐞𝐭𝐬 𝐌𝐞 𝐀𝐩𝐚𝐫𝐭 Ownership • Agility • Outcome focus • Active LangChain contributor • Relentless learner who stays ahead of GenAI advances 𝐍𝐞𝐱𝐭 𝐒𝐭𝐞𝐩𝐬 1 • Share your challenge and goals 2 • Receive clarifying questions and a phased action plan within 24 hours 3 • Kick off the first sprint after aligning on scope, KPIs, and timeline Ready to ship a production-ready AI MVP or modernize your existing app? Let’s talk.

Full Stack Engineer with 4+ years building production-grade web applications enhanced with AI capabilities. I deliver complete solutions from database to deployment, now specializing in integrating intelligent features that give your product a competitive edge. 𝗪𝗛𝗔𝗧 𝗜 𝗕𝗨𝗜𝗟𝗗: ✦ Modern web applications with AI-powered features (chatbots, recommendations, smart search) ✦ SaaS platforms with intelligent automation and data processing ✦ Custom dashboards with real-time analytics and AI insights ✦ RAG systems that let your app intelligently query your business data ✦ API-first architectures connecting frontend, backend, and AI services 𝗧𝗘𝗖𝗛𝗡𝗜𝗖𝗔𝗟 𝗘𝗫𝗣𝗘𝗥𝗧𝗜𝗦𝗘: 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: React, Next.js, TypeScript, Tailwind CSS, Responsive Design, Real-time WebSocket interfaces 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: Node.js, Express, NestJS, Python, FastAPI, Django, RESTful APIs, GraphQL, Microservices architecture 𝗔𝗜 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻: LangChain, OpenAI GPT-4, Claude API, RAG implementations, Vector databases (Pinecone, Qdrant), Prompt engineering, AI agent development 𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲𝘀: PostgreSQL, MongoDB, MySQL, Redis, Prisma ORM, Database optimization 𝗖𝗹𝗼𝘂𝗱 & 𝗗𝗲𝘃𝗢𝗽𝘀: AWS (EC2, S3, Lambda, RDS), Docker, Kubernetes, CI/CD pipelines, Nginx, Linux server management 𝗧𝗵𝗶𝗿𝗱-𝗣𝗮𝗿𝘁𝘆 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀: Stripe payments, SendGrid/Mailchimp email, Google Maps, OAuth authentication, Webhook implementations 𝗪𝗛𝗬 𝗪𝗢𝗥𝗞 𝗪𝗜𝗧𝗛 𝗠𝗘: → 𝗖𝗼𝗺𝗽𝗹𝗲𝘁𝗲 𝗼𝘄𝗻𝗲𝗿𝘀𝗵𝗶𝗽: I handle everything from architecture design to production deployment → 𝗔𝗜-𝗲𝗻𝗵𝗮𝗻𝗰𝗲𝗱 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀: I don't just build apps, I make them intelligent with modern AI capabilities → 𝗣𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻-𝗿𝗲𝗮𝗱𝘆 𝗰𝗼𝗱𝗲: Clean, documented, tested code following industry best practices → 𝗧𝗿𝗮𝗻𝘀𝗽𝗮𝗿𝗲𝗻𝘁 𝗰𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗶𝗼𝗻: Regular updates, realistic timelines, no surprises → 𝗤𝘂𝗶𝗰𝗸 𝘁𝘂𝗿𝗻𝗮𝗿𝗼𝘂𝗻𝗱: Efficient development without compromising quality 𝗠𝗬 𝗣𝗥𝗢𝗖𝗘𝗦𝗦: 1. 𝗗𝗶𝘀𝗰𝗼𝘃𝗲𝗿𝘆: Understanding your vision, users, and technical requirements 2. 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲: Designing scalable solutions with proper database schema and API structure 3. 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: Iterative builds with regular demos and feedback loops 4. 𝗧𝗲𝘀𝘁𝗶𝗻𝗴: Comprehensive testing across devices and edge cases 5. 𝗗𝗲𝗽𝗹𝗼𝘆𝗺𝗲𝗻𝘁: Production deployment with monitoring and documentation 6. 𝗦𝘂𝗽𝗽𝗼𝗿𝘁: Post-launch support and guidance for your team 𝗜𝗗𝗘𝗔𝗟 𝗣𝗥𝗢𝗝𝗘𝗖𝗧𝗦: • Web applications that need AI features (chatbots, content generation, smart recommendations) • SaaS platforms requiring scalable backend architecture • Existing apps needing modernization or AI integration • MVPs for startups that need to move fast without technical debt • Complex integrations connecting multiple services and APIs I'm particularly effective for founders and product teams who want a technical partner who understands both modern web development and emerging AI capabilities - someone who can build the full stack AND make it intelligent. 𝗟𝗘𝗧'𝗦 𝗕𝗨𝗜𝗟𝗗 𝗦𝗢𝗠𝗘𝗧𝗛𝗜𝗡𝗚 𝗚𝗥𝗘𝗔𝗧: Have a web application idea or an existing system that needs AI capabilities? Send me a message with: • What you're building and who it's for • Your biggest technical challenge or question • Your timeline and budget range I'll respond within 12 hours with my thoughts on approach, feasibility, and a ballpark estimate. No sales pitch - just honest technical perspective from someone who's built this before.

I’m a Senior Web Developer, Team Lead, and Software Architect with over 20 years of experience building robust web applications across a wide range of industries and domains. Soft Skills • Leading and organizing agile development processes • Translating ideas into clear wireframes and product concepts • Designing scalable and efficient database architectures • Building and mentoring high-performing teams • Communicating effectively with non-technical stakeholders Technologies • Ruby on Rails • PostgreSQL, MySQL, Neo4j, Elasticsearch • JavaScript (Stimulus, Turbo.js, Vue.js) • Linux system administration, AWS, Heroku, Docker • HTML5, CSS, Tailwind If you have an idea for a project or need technical leadership, feel free to get in touch.

From startup MVPs and SaaS platforms to AI-powered applications and internal business systems, I've spent the last 8+ years building products that solve real business problems. I work with founders, startups, and growing companies that need more than just a developer - they need someone who can understand the product, make sound technical decisions, and build systems that are scalable, maintainable, and ready for growth. Whether you're launching a new SaaS product, building an MVP, expanding an existing platform, creating customer portals, developing APIs, implementing subscription systems, or integrating AI capabilities, I focus on delivering solutions that create long-term value rather than short-term fixes. My expertise spans the entire development lifecycle, from architecture planning and database design to frontend development, backend systems, cloud infrastructure, deployment, and ongoing product improvements. Over the years, I've built and contributed to: • SaaS Platforms & Startup MVPs • Multi-Tenant Applications • Customer Portals & Admin Dashboards • Internal Business Tools • Subscription & Billing Systems • API-Driven Applications • AI-Powered Products & OpenAI Integrations • Automation Platforms & Workflow Systems • Cloud-Native Web Applications Tech Stack: Frontend: Next.js, React, TypeScript, JavaScript, Tailwind CSS, Material UI Backend: Node.js, NestJS, Express.js, REST APIs, GraphQL, WebSockets Databases: PostgreSQL, MongoDB, MySQL, Redis, DynamoDB Cloud & DevOps: AWS, Lambda, EC2, S3, RDS, CloudFront, Docker, CI/CD, Vercel AI & Automation: OpenAI, ChatGPT Integrations, AI Workflows, Automation Systems I enjoy working on products where technology directly supports business growth, user experience, and operational efficiency. 📩 If you're looking for a developer who can take ownership, contribute beyond implementation, and help build a product that scales, let's discuss your project. 🔑 Keywords Full Stack Developer, SaaS Developer, Next.js Developer, React Developer, Node.js Developer, TypeScript Developer, JavaScript Developer, Web Application Development, SaaS Development, MVP Development, Startup Development, Dashboard Development, API Development, REST API Development, Backend Developer, Frontend Developer, NestJS Developer, PostgreSQL, MongoDB, AWS Developer, Amazon Web Services, Docker, OpenAI Integration, AI Developer, ChatGPT Integration, AI SaaS Development, Cloud Application Development, Microservices Development.

🚀 I build production-ready SaaS platforms, custom marketplaces, automation systems and cloud-deployed web applications — with a focus on booking, payment, subscription, CRM, admin dashboard and operational workflows. With 10+ years of full-stack software engineering experience, I help startups and businesses build new products, extend existing platforms, complete complex MVPs and solve production-critical issues using Ruby on Rails, Node.js, React/Next.js, Stripe, GoHighLevel and DevOps across Alibaba Cloud, AWS and Google Cloud Platform (GCP). WHAT I CAN HELP YOU WITH • SaaS platforms, startup MVPs and custom web applications • Marketplace, booking, scheduling and multi-role user workflows • Stripe payments, subscriptions, refunds, platform fees and credit systems • CRM systems, admin dashboards, messaging and third-party API integrations • GoHighLevel / LeadConnector Voice AI and lead automation workflows • Ruby on Rails, Node.js, React, Next.js and Angular application development • Replit and Lovable MVP debugging, completion and production readiness • DevOps, Docker, Kubernetes, CI/CD and cloud deployment on Alibaba Cloud, AWS and Google Cloud Platform (GCP) CUSTOM SAAS & MARKETPLACE DEVELOPMENT I recently worked on a heavily customized coaching marketplace built on top of Sharetribe. While Sharetribe provided the base platform, most of my work involved custom product engineering, including: • Booking, cancellation, scheduling and multi-role workflows • Stripe payments, refunds, subscriptions, fees, credits and checkout logic • Messaging and inbox improvements, reviews, revenue reporting and admin controls • Calendar and timezone fixes, booking identification, support features and production debugging This experience is relevant to SaaS products and marketplaces involving customers, service providers, transactions, subscriptions and operational workflows. GOHIGHLEVEL, VOICE AI & CRM AUTOMATION I also work with GoHighLevel (GHL) and LeadConnector Voice AI. In an insurance-focused AI agent project, I have been implementing and testing: • Inbound and outbound call workflows, AI agent routing and qualification logic • Lead capture, CRM/contact-field automation and appointment workflows • Transcript, recording and workflow troubleshooting DEVOPS, CLOUD ARCHITECTURE & PRODUCTION DELIVERY My portfolio includes architecture diagrams and project work involving Alibaba Cloud, Amazon Web Services (AWS) and Google Cloud Platform (GCP). My DevOps experience includes: • Alibaba Cloud ACK/Kubernetes environments, ingress, networking and managed infrastructure • AWS and GCP architecture and deployment planning for scalable web applications • Docker, Kubernetes, CI/CD, SSL/domain configuration and production deployments • PostgreSQL, MongoDB, Redis and Elasticsearch/Kibana environment support • Production troubleshooting, performance improvements and release support CORE STACK Ruby on Rails | Node.js | Express | NestJS | React.js | Next.js | Angular | PostgreSQL | MySQL | MongoDB | REST APIs | GraphQL | Stripe | Sharetribe | GoHighLevel | Alibaba Cloud | AWS | GCP | Docker | Kubernetes | CI/CD I can join an existing product, understand its business workflows, diagnose difficult application or infrastructure issues and deliver stable, production-ready improvements. Building a SaaS platform, marketplace, booking system, AI automation workflow or cloud-deployed application? Let’s discuss how I can help.

🚀 Experienced Ruby on Rails developer 🚀 | 🏎️💛 Yellow Miata driver 💛 If you’re looking for a Ruby on Rails developer who understands SaaS products, a full stack developer Saas who sees the entire system, or a react developer who values real user experience — let’s talk. I’m a Ruby on Rails developer with strong product thinking who helps startups and growing companies build reliable, scalable, and maintainable platforms for long-term success. My background includes building modern web app platforms and scalable web application systems with custom web design, software architecture and design, and scalable API integration practices. As a Ruby on Rails developer, I work closely with founders, CTOs, and product teams to turn business requirements into stable, production-ready solutions. I have extensive experience as an AI Saas developer, focusing not only on backend implementation but also on growth, retention, and monetization. As a web app developer, I design systems around real workflows, combining strong web app design and performance using JavaScript, CSS, HTML5, Bootstrap, and TypeScript. 🧠 Deep product-focused experience With over 9 years of experience, I’ve worked on everything from MVPs to high-traffic systems. I’ve contributed to multiple products as a SaaS developer, including chatbot Saas solutions and platforms powered by ruby on rails openai. My work often involves building scalable web application development systems with strong architecture, RESTAPI, API development, and Database architecture. I’ve also worked on frontend integrations as part of Ruby on Rails React stacks, ensuring smooth UX and consistent web design across products. As a full stack ai saas developer, I bridge frontend, backend, and infrastructure to deliver complete solutions, including saas mobile app integrations where needed using React Native, Next.js, Vue.js, Angular, and Node.js. ⚙️ What I do Ruby on Rails application development from MVP to scale SaaS platform architecture and system design Custom backend logic and API development (REST & GraphQL) Background jobs, queues, and async processing Cloud deployments, CI/CD pipelines, and automation Third-party integrations and advanced workflows Beyond traditional SaaS platforms, I’ve worked on ecommerce systems and custom solutions as a web developer, including Shopify integrations. I’ve also built AI-powered features as part of AI Saas platforms, acting as a full stack saas developer ai agents to deliver intelligent automation, AI Agent Development, Large Language Model integrations, Retrieval Augmented Generation, Vector Database, machine learning, and LLM Prompt Engineering. I also collaborate with teams as a saas designer, contributing to product structure and usability, and can support product presentation through saas demo video creation when needed. ✅ What you get working with me Clean, well-structured code and scalable architecture. As a SaaS developer, I focus on long-term product success. As a web application developer, I deliver solutions aligned with real business needs and support developing and maintaining the application and optimizing performance within an existing Ruby on Rails project. 🔹 Proven real-world impact I helped scale a startup product to nearly 1,000,000 users, shaping my approach to performance and reliability. I’ve also worked on systems requiring high data integrity and integrations across multiple services using PostgreSQL, Redis, MySQL, SQL, Firebase, Heroku, Amazon web services, and DevOps practices. 🏆 9+ years as a Ruby on Rails Developer with 150+ software products delivered 🚀 SaaS Developer | 26+ platforms bіuilt & scaled 💻 As a Web Application Developer I helped scale a startup product to nearly 1,000,000 users, shaping my approach to performance and reliability. ⭐️ Top Rated | 100% Job success score | 5-star reviews only 💰 $10K+ earned on Upwork | 5,000+ hours worked on different projects as a Full stack developer 🤖 15+ AI Products Delivered | Agents, RAG & Automation Systems 🔗 110+ Integrations built | Stripe, Shopify, OpenAI, Twilio & more 🌍 Clients across 9+ countries | Long-Term Partnerships & Repeat Business 🔒 Production-Ready Solutions | Secure, Scalable & Maintainable Code Experienced as a Rails + React Developer, Ruby on Rails architect, Senior Ruby on Rails Developer, senior Rails Developer, Ruby on Rails engineer, Full-stack web developer, and senior full-stack Ruby on Rails engineer with a strong background in Ruby on Rails. 🤝 Let’s build something solid If you’re looking for a Ruby on Rails developer who understands SaaS products, a full stack developer who sees the entire system, or a react developer who values real user experience - let’s talk.

I am a Senior Rails & DevOps Engineer with 15+ years of experience specialized in stabilizing, scaling, and modernizing complex web applications. When product owners and startup founders face messy codebases, performance bottlenecks, or tricky integrations, I step in to fix the root causes—not just apply temporary patches. I work 100% independently. No outsourcing, no middle-men. You get direct senior-level expertise. Here are the specific problems I solve for my clients: API / System Integration • Need to connect external services seamlessly? I integrate complex REST/OAuth2 APIs and third-party systems including Stripe, Mailchimp, FlightStats, Shopify, Simpro, Open-Meteo, Alpha Vantage, Google/Outlook Calendars, and Sendy. API Development • Need a custom, high-performance API? I build clean, well-structured, and secure APIs from scratch, thoroughly tested using Postman and curl, tailored for mobile apps or frontend consumption. Custom Shopify App Development • Need a tailored solution for your Shopify store? I build robust, non-embedded Shopify apps using Ruby on Rails to automate complex workflows and sync critical store data in real-time, including: - Products & Inventory: Real-time stock sync and automated catalog updates. - Orders & Fulfillment: Streamlined order processing, tracking updates, and custom fulfillment workflows. - Customers & Metafields: Advanced customer data management and extended store capabilities using custom metafields. - Automated PDF Generation: On-the-fly generation of custom invoices, packing slips, receipts, and downloadable business documents based on real-time store events. Performance & Scaling (Sidekiq, Redis, Queries) • Background jobs failing? Memory leaks? I analyze production logs, queue behavior, and server configs to eliminate bottlenecks and slash your server costs. Legacy Rails Modernization (v3.x to 7.x) • Stuck on an old Rails version? I dockerize your setup, resolve dependency hell, and modernize your stack for local development and production. Infrastructure & Cloud Migrations (Heroku / DigitalOcean / AWS) • Full server provisioning, Nginx configuration, SSL setup, Docker containerization, and automated deployment pipelines (Kamal, CI/CD). Bulletproof Stripe Integrations • Implementation and debugging of complex payment flows: Subscriptions, Webhooks, Payment Intents, and custom invoice handling. Modern Frontend & Fullstack Capabilities • Need UI modernization alongside backend fixes? I build fast, responsive, and interactive interfaces using Tailwind CSS, Vue.js, and Hotwire/Turbo, keeping your stack clean and efficient. Search Optimization • Transitioning slow database queries into lightning-fast searches using Elasticsearch and smart caching strategies. Let’s get your system stabilized. Reach out and briefly share your current tech stack and the challenges you're facing—I’ll take a look and let you know how we can fix it. Best regards, Sugi