Hire the Best Glassfish Developers

Availability: Full-time freelancer, 𝟰𝟬+ hours/week, open to long-term collaborations. I’m a Full-Stack & AI Engineer with 10+ years of experience building web and mobile applications and 3+ years of specialized experience in AI and Large Language Models (LLMs). I design, develop, and deploy production-grade platforms, from scalable SaaS dashboards to AI-powered assistants, RAG systems, and voice agents. I work end-to-end: architecture → backend → frontend → cloud deployment, with a focus on clean code, maintainable systems, and high performance. Over the past few years, I’ve delivered solutions that integrate AI/LLM pipelines, vector search, real-time chat, and voice agents for enterprise and startup clients. 🤖 AI & LLM Expertise - MCP Server Development: Designing and integrating custom MCP servers for AI agents, enabling structured tool usage, external system integrations, database querying, and API orchestration. - Fine-Tuning: Persona creation, Q&A systems, and domain-specific models (medical, legal) using Mistral and Llama 3. - Synthetic Dataset Generation: Streamlining LLM training with high-quality datasets. - Evaluation Frameworks: Assessing LLM performance with custom metrics. - Cloud Deployment: Deploying LLMs on AWS and GCP. - AI Agents & Voice Bots: Proficient with LiveKit, Retail AI, OpenAI. - Open-Source Deployment: Expertise deploying models like vLLM on AWS/GCP/RunPod using SkyPilot. 🛠️ 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗧𝗼𝗼𝗹𝘀 & 𝗙𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸𝘀 ➜ LLM Tools: LangChain, Langsmith, Langfuse , Hugging Face, Transformers. ➜ Vector Databases: Chroma, FAISS, Pinecone, Qdrant , Opensearch ➜ AI Workflows: Flowise AI, LangFlow, StackAI. 🛠️ 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 ➜ Languages & Frameworks: Python, Node.js, ReactJS. ➜ Database Management: MongoDB, MySQL, PostgreSQL , Supabase , FIrebase ➜ Frontend & Backend Integration: Seamlessly connecting APIs and user interfaces. 🌟 𝗔𝗱𝘃𝗮𝗻𝗰𝗲𝗱 𝗦𝗸𝗶𝗹𝗹𝘀 ➜ Open-Source LLMs: Proficiency in LLAMA 3, Mistral 7B, and Mixtral 8x7B. ➜ Prompt Engineering: Expertise in techniques like Chain of Thought, Few-shot Prompting, and Self-Reflection. ➜ Fast Inference: Implementing high-speed solutions with vLLM . 🌟 𝗪𝗵𝘆 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝗲? With over 10 years of experience, I deliver scalable, cutting-edge solutions tailored to your project’s needs. Whether it's advanced AI models, MCP server development, LLM optimization, or full-stack development, I ensure top-notch results every time. Let’s collaborate to bring your ideas to life!

I build SaaS and AI MVPs end to end. You bring the idea — I ship the product. Most founders waste months bouncing between developers who overpromise and underdeliver. I don't work that way. With a 100% Job Success Score across 30+ projects, I build things that go live, get users, and scale. Dual degree in Software Engineering and Data Science. Experience shipping real systems at Orange and General Electric. Now I do the same for startups — faster and leaner. What I build: SaaS MVPs — Multi-tenant architecture, auth, subscriptions, dashboards. The full product, not just a prototype. AI-Powered Apps — LLM integrations, RAG pipelines, AI copilots and chatbots embedded into products that actually work in production. Automation Workflows — n8n, Make, Zapier and custom API logic that eliminate the manual work killing your team's productivity. Full-Stack from scratch — React / Next.js frontend, Node/NestJS or Spring Boot backend, deployed on AWS with Docker and CI/CD. Stack: Next.js, React, Node.js, NestJS, Spring Boot, Python, LangChain, OpenAI API, n8n, Make, AWS, Docker, Kubernetes. Got an idea, a half-built product, or a process you need automated? Let's ship it.

Full Stack Developer — React, Next.js, TypeScript, Node.js, PostgreSQL I build production web applications that handle real business operations at scale. Currently, I'm a Full Stack Developer at The h.wood Group, where I built and maintain Tipsee — an enterprise platform serving 14+ hospitality venues. The stack: React + TypeScript + Tailwind (frontend), Node.js + Express (backend), PostgreSQL (database), deployed on Vercel and Azure. I've built 241+ API endpoints, integrated 11 third-party services, implemented role-based access control for 10 user roles, and automated operations with scheduled jobs and webhook processing. I use AI-assisted development tools (Claude Code, Cursor) daily in production — not as a novelty, but as core workflow tools that let me deliver faster without sacrificing quality. What I do best: Full-stack web apps — React, Next.js, TypeScript, Node.js, Express, PostgreSQL API design and third-party integrations — REST APIs, webhooks, OAuth, data pipelines UI implementation from Figma designs — pixel-perfect, responsive, Tailwind CSS Database design — schema architecture, query optimization, ETL pipelines Deployment and DevOps — Vercel, Azure, GitHub Actions, CI/CD I also build and customize apps on no-code/low-code platforms — Bubble, Lovable, Bolt, Retool, Webflow, Framer, and Airtable — when speed and cost-efficiency matter most. Let's talk about your project.

Hi, I’m Ronak, Founder of Retoolers(.io), an Accredited Retool Agency Partner and home to 20+ passionate Retool Engineers obsessed with building custom tools. We’ve built 1,500+ apps and workflows for 100+ companies across industries: 🏢 SaaS & Real Estate | 💰 Venture Capital | 🛒 E-Commerce | 🧠 Analytics | ☕ Hospitality | 🧬 HealthTech Our mission is simple: simplify operations, accelerate growth, and empower decision-making with tools that automate, visualize, and scale your business. ⚙️ What We Build We specialize in: 🧭 Dashboards & Admin Panels – real-time metrics and data visibility 📈 Analytical Tools – KPIs, charts, and dynamic insights for decision-makers 🔄 Automations & Workflows – save hours every week with smart logic 🧱 Client & Partner Portals – secure, elegant, data-driven interfaces 💼 Internal Business Apps – for ops, finance, HR, logistics, and more 🌍 Trusted by Global Clients Here’s a snapshot of the companies we’ve empowered: Alternatives – Venture Capital Platform Alianza Capital – Real Estate Investment Little Earth, Third Wave Discounts, Napind – E-Commerce The Holding Co. – HealthTech Startup Professor Egghead – EdTech Coral Travel – Hospitality & Travel Samwise AI – Defense AI SaaS “It’s clear Retoolers are experts at Retool apps. Their professionalism, attention to detail, and ability to deliver on time make them an easy choice.” — Daniel Feldman, Senior Product Manager, The Holding Co. “Their competence makes them a pleasure to work with, and I’d recommend them as a world-class development partner.” — Andrew C., CEO, Stealth Startup 💼 Why Founders Choose Retoolers ✅ Deep Business Understanding — We don’t just code; we learn your business model before we build. ✅ Lightning-Fast Execution — Get MVPs and dashboards in weeks, not months. ✅ Full-Stack Retool Team — Retool Manager, Tech Lead, Experience Designer, Tester & Developer — every role covered. ✅ Data Integration Pros — From Google Sheets to SQL, Airtable to APIs — we’ve connected them all. ✅ Free Wireframing & Consultation — Visualize your idea before we build. 🧠 Our Process Phase 1: Discovery & Wireframing (Free) We’ll map your workflows and data sources visually — no cost, no risk. Phase 2: Development & QA (3–4 weeks) Our team codes, tests, and delivers your app with pixel-perfect precision. Phase 3: Support & Scaling We stay to help iterate, enhance, and scale your tool as your business grows. 🌟 Why This Matters When you work with Retoolers, you don’t just get software — you get a business-enabling system designed to save time, increase efficiency, and make your operations bulletproof. We’re not freelancers chasing deadlines; we’re your Retool partner helping transform manual tasks into automated intelligence. 📞 Ready to Build Something Remarkable? If your startup, VC firm, or operations team is ready to simplify and scale with data-driven tools, let’s talk. 💬 Message me with “Let’s Build” and I’ll personally review your business flow or send a few example dashboards tailored to your industry. Let’s simplify your operations, one Retool app at a time. Ronak Jain Founder, Retoolers Accredited Retool Agency Partner 📊 Dashboards | ⚡ Workflows | 🔗 Integrations | 🧠 Insights

🇺🇸USA BASED - FLUENT ENGLISH SPEAKER 👨🏽‍💻 Professionally built 100+ full stack mobile apps, SaaS apps, sales/marketing tech, Bubble io apps, cybersecurity tools, GHL Marketplace Apps, AI-powered platforms, automations, and custom software using React, Node.js, Next.js, JavaScript, APIs, Claude Code, Cursor, ChatGPT, and modern AI-assisted development workflows. I leverage AI (Claude Code & Cursor) and advanced coding agents to dramatically speed up development, debugging, architecture planning, prototyping, integrations, and shipping Without AI, I’m already a weapon as a developer. With AI, I become a super weapon capable of building and shipping at an extremely high level and speed. 🏆 My work earned me Top-Rated Plus status and 100% Job Satisfaction on Upwork (& outside Upwork). 🙅 Please don't contact me if communication is poor. ✅ Trust & Integrity are my #1 virtues. I pride myself on excellent communication, fast execution, strong project management, and being a reliable technical partner who takes the time to fully understand your vision before building. Keywords: AI developer, Claude Code, Cursor AI, ChatGPT development, AI-assisted coding, full stack developer, React developer, Next.js developer, Node.js developer, Bubble io expert, Bubble io developer, SaaS development, AI SaaS, startup MVP, rapid MVP development, AI integrations, API integrations, automation systems, custom CRM development, GHL Marketplace Apps, no-code development, low-code development, mobile app development, web app development, AI automation, AI workflows, AI agents, AI-powered apps, marketplace development, cybersecurity tools, internal tools, dashboard development, responsive UI design, business automation, startup software development, scalable SaaS platforms, custom software solutions, Bubble io freelancer, FlutterFlow, Adalo, Make . com, Zapier, social media apps, landing pages, app prototyping, AI product development, sales automation, marketing automation, custom integrations, database architecture, mobile-first development, cloud applications, JavaScript frameworks, frontend development, backend development, startup founder support

Ex-Walmart Global Tech Engineer (Fortune #1 Company) | Backend, Full Stack & Cloud Engineer 5+ years of software engineering experience delivering scalable backend systems, SaaS platforms, cloud-native applications, workflow automation solutions, AI-powered products, and production-grade APIs. I've worked across enterprise and startup environments, delivering 20+ projects involving microservices, workflow orchestration, cloud infrastructure, DevOps automation, AI integrations, marketplace platforms, analytics systems, and large-scale business applications. At Walmart Global Tech, I built scalable backend services, APIs, workflow systems, and data platforms supporting enterprise-scale operations. My work focused on performance optimization, workflow automation, system reliability, cloud-native development, and large-scale data processing. I specialize in turning complex business requirements into reliable, scalable, and maintainable software solutions. 🚀 Backend Engineering ⭐ Java & Spring Boot ⭐ Node.js & Express.js ⭐ Python (FastAPI, Django) ⭐ PHP & Laravel ⭐ REST APIs & Microservices ⭐ OpenAPI / Swagger ⭐ Apache Kafka ⭐ Event-Driven Architecture ⭐ Camunda BPM & Workflow Automation ⭐ Apache Airflow ⭐ Third-Party API Integrations ⭐ Distributed Systems ⭐ System Design & Scalability Key Impact: ✔ Developed 100+ production APIs and integrations ✔ Improved API response times by 20–30% through performance optimization ✔ Built scalable systems processing millions of records ✔ Automated business workflows reducing manual effort by 50%+ 🎨 Frontend Development ⭐ React.js ⭐ Next.js ⭐ JavaScript ⭐ TypeScript ⭐ HTML5 & CSS3 ☁️ Cloud & DevOps ⭐ AWS Cloud Infrastructure ⭐ Docker & Containerization ⭐ Kubernetes ⭐ Jenkins ⭐ GitHub Actions ⭐ GitLab CI/CD ⭐ Infrastructure Automation ⭐ Deployment Automation ⭐ Linux Administration ⭐ Monitoring & Production Support ⭐ DevOps & Release Engineering Key Impact: ✔ Reduced deployment effort by 80% through CI/CD automation ✔ Improved release reliability through automated deployment pipelines ✔ Supported highly available production environments with strong observability practices 🗄️ Databases & Data Technologies ⭐ PostgreSQL ⭐ MySQL ⭐ MongoDB ⭐ Redis ⭐ SQL Server ⭐ Oracle Database ⭐ Elasticsearch 🤖 AI & Automation ⭐ OpenAI APIs ⭐ AI Integrations ⭐ Workflow Automation ⭐ AI-Assisted Development (Cursor, Claude, ChatGPT, GitHub Copilot) Key Impact: ✔ Built AI-powered workflow automation platforms ✔ Integrated AI services into production applications ✔ Automated content processing and operational workflows 🏆 Recent Project Highlights ✔ AI-Powered Workflow Automation Platform * Reduced manual processing effort by 50%+ * Integrated AI-driven automation into business workflows ✔ Enterprise SaaS Management Platform * Built scalable backend architecture and APIs * Improved operational efficiency through workflow automation ✔ Marketplace & Matching Platform * Implemented provider matching, notifications, and transaction workflows * Designed scalable backend architecture supporting future growth ✔ Enterprise Data & Analytics Platform * Processed millions of records through automated ingestion pipelines * Reduced reporting turnaround time significantly through automation ✔ DevOps Automation & CI/CD Platform * Reduced deployment effort by 80% * Improved release quality and deployment consistency ✔ Cloud-Native Backend Infrastructure * Designed scalable microservices and API-driven architectures * Implemented monitoring, observability, and production support workflows ✔ WiCAN / OBD Diagnostic Platform * Built backend integrations and CAN communication workflows * Developed hardware-to-cloud communication systems Why Clients Work With Me ⭐ Ex-Walmart Global Tech Engineer ⭐ 4+ Years of Professional Experience ⭐ 20+ Successfully Delivered Projects ⭐ Strong Backend, Full Stack & Cloud Expertise ⭐ Fast Execution & Ownership Mindset ⭐ Clean, Scalable & Maintainable Code ⭐ Enterprise + Startup Experience ⭐ Production-Grade Cloud Infrastructure Experience ⭐ Strong Debugging & Root Cause Analysis Skills ⭐ End-to-End Product Delivery Whether you need a scalable backend, workflow automation platform, AI-powered application, cloud-native architecture, marketplace platform, enterprise dashboard, SaaS product, DevOps automation, or complex system integration, I can help transform requirements into reliable, production-ready solutions.