Senior Full-Stack Engineer specializing in Ruby on Rails backends with AI/LLM integrations. 10+ years of experience helping startups, SaaS companies, and agencies ship fast, scale cleanly, and add AI features that actually work in production. 🧩 What I Build 🔹 Rails + Next.js SaaS platforms — from MVP to scale 🔹 LLM-powered features — chatbots, RAG pipelines, AI agents, smart search 🔹 High-performance APIs, real-time systems, and clean microservice architectures 🔹 AWS deployments with CI/CD, Docker, and zero-downtime rollouts 🛠 Core Stack Ruby on Rails · Next.js · Node.js · Python/FastAPI · PostgreSQL · AWS · OpenAI (GPT-4 / 4o) · Docker 🏆 Why Clients Work With Me ✅ Top Rated Plus with 100% Job Success ✅ Clear communication, daily updates, no surprises ✅ Senior-level architecture decisions, not just code delivery ✅ I ship on time and explain trade-offs honestly If you're building an MVP, scaling a funded product, or adding AI to an existing SaaS — let's talk.

Companies usually bring me in when they need more than just code. They need systems that are stable, scalable, and built with long term product growth in mind. I work with startups and growing businesses to turn complex ideas into production ready SaaS platforms, AI powered applications, automation systems, and data driven products that perform reliably in real world environments. Most of the projects I work on involve APIs, backend architecture, automation workflows, analytics, and AI integrations where clean engineering decisions matter from day one. Clients typically hire me to build MVPs fast without creating future technical debt architect scalable backend systems and APIs integrate complex third party services reliably implement practical AI workflows and automation stabilize existing production systems improve performance, scalability, and maintainability transform fragile platforms into dependable products I focus heavily on building clean and maintainable architecture so products continue to scale smoothly as usage grows. That includes SaaS platforms with admin dashboards and subscription systems AI powered applications using OpenAI, Claude, RAG pipelines, and intelligent workflows API driven platforms with multiple external integrations analytics and data visualization systems processing large datasets fintech, healthcare, and operational platforms where reliability is critical I work across the full stack from frontend experience to backend services, infrastructure, and data pipelines ensuring the entire system behaves predictably and remains maintainable over time. Platforms I Commonly Build SaaS Platforms Startup MVPs, internal business tools, admin portals, workflow systems, and scalable subscription based products. AI Powered Systems Applications integrating LLMs, AI agents, document processing, automation pipelines, semantic search, and retrieval systems. Data and Analytics Platforms Dashboards and reporting systems handling operational data, financial metrics, business intelligence, and real time analytics. API and Automation Infrastructure Systems connecting multiple third party platforms using APIs, webhooks, queues, and automation frameworks. Core Technologies Frontend Next.js React TypeScript TailwindCSS Backend Node.js Python FastAPI REST APIs Infrastructure and Data PostgreSQL Supabase Docker CI CD Pipelines AI and Automation OpenAI API Claude API AI Agents RAG Systems Zapier Make n8n Development Philosophy I focus on building production ready systems instead of temporary fixes. My approach is centered around clean and scalable architecture reliable API first system design predictable production behavior maintainable and extensible codebases reducing technical debt early building systems that teams can confidently scale If you are building a SaaS platform, an AI powered product, a data intensive dashboard, an automation heavy workflow system, or a platform with complex integrations and need someone who understands both technical architecture and product execution, I would be happy to discuss your project.

100% 🚀 TOP RATED PLUS, 𝗧𝗢𝗣 𝟯% 𝗼𝗳 𝗽𝗲𝗿𝗳𝗼𝗿𝗺𝗲𝗿𝘀 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸 I am a FULL-STACK web developer with many years of experience. Flexible, persistent, and committed team member is who i am. My skills set: - build shopify app 2.0 with graphQL api - Backend: Ruby on Rails, Node.js, Next.js MySQL, PostgreSQL, MongoDB, TDD, rSpec, API integration/design - FrontEnd: HotWire, Reactjs, Angularjs, Vue.js, Tailwindcss, Twitter bootstrap, Typescript, CSS, HTML. I am comfortable on advanced usage of GIT I enjoy helping my clients building well designed and profitable projects.

I’m a top Sharetribe developer with extensive expertise in building and customizing marketplaces that drive results. Over the years, I’ve helped clients launch feature-rich platforms tailored to their unique business needs. I handle everything from designing the look of your marketplace to adding advanced features and making sure it runs smoothly. My focus is on creating a platform that meets your goals and gives your users a great experience. I am also experienced in technologies like Ruby on Rails, Node.js, Express, Postgres, MySQL, JavaScript, jQuery, Sharetribe, and React. I bring a wealth of experience to the table, and I'm eager to tackle any project or challenge that comes my way. Whether it's crafting seamless user interfaces, optimizing database performance, or building dynamic web applications, I'm ready to dive in and make it happen. Let's transform your ideas into digital reality! I also have extensive expertise with Bubble.io and am a highly qualified no-code/low-code developer. I have extensive expertise with Bubble.io and I am a highly qualified no code/low code developer I've worked on many kinds of projects such as eCommerce, CRM, ERP, RESTful API service, Payment platforms integration in Ruby on Rails. I'm Highly Proficient in use almost Rails' well-known gems: Devise, Cancan/Pundit, Paperclip, Sidekiq/Resque, RSpec/Minitest. My Full Technical abilities are: ✔︎ Ruby, Ruby on Rails, Node, Express, ✔︎ Open source - Spree, Solidus, Catarse, Discourse ✔︎ Sharetribe, Custom Sharetribe, Sharetribe Flex, Sharetribe Go ✔︎ React/Redux/Mobx, React Native, Vue.js. ✔︎ Javascript | CSS (with Sass, Stylus and Postcss ) | HTML (erb, Haml, Jade, Slim, JSX) ✔︎ MongoDB, PostgreSQL, MySQL ✔︎ Third-party API: Google Map API, AWS, Digitalocean API, GitHub API, Facebook, Twitter, Vk.com and so forth. ✔︎ Web-servers arrangement: Linux, Nginx, PostgreSQL, Passenger, Rails, Node.js I follow Agile methodology and I am highly familiar with scrum principles. I am familiar with version control tools like Bitbucket, Github and Gitlab. I also have good experience working with project management tools like Asana, Jira, Trello, Basecamp, Lark and Some others and widely open to adopt any new tool for betterment and transparency. I am accessible to offer Technical meeting/Test. Kindly let me know whether you're intrigued, I couldn't imagine anything better than to set up a brisk introduction visit/call at your helpful time. I am looking for long term working relationship.

Dedicated software craftsman. I write simple, elegant code, but I know how to be clever when necessary. I am a mathematician at heart, and I enjoy applying an analytical mindset to software development. I love identifying problems and crafting solutions across various technology layers. My skills rest solidly in full-stack development with a focus on overall architecture, backend code, and database design. On any given day I might be designing a complex SQL query, refactoring a Ruby module, pruning a Rails app, wrestling my react/redux code into submission, or stretching elasticsearch. I enjoy building web applications, and I am grateful to God for granting me the means and opportunity to provide for my family through fruitful development work. Current Technologies: Ruby on Rails (15+ years), PostgreSQL (8+ years), other relational databases (15+ years), elasticsearch, JavaScript (with ES6, react, redux, etc.), docker, git, RSpec, capybara, CircleCI.

7 years of Ruby on Rails fullstack (front-end, back-end and deployment) experience. 7 years deploying on the cloud (AWS, Azure, Digital Ocean, Heroku) 2 years Rust experience. AWS Certified DevOps Engineer - Professional Certified Kubernetes Administrator (CKA) Hashicorp Certified - Terraform Associate 003 I'm 100% committed to achieve success in your web applications with the results to prove it. Previous project work includes: ● Setting up 1-to-1 voice conferences using Twilio API ● Custom 2 factor authentication implementation ● Uploading and storing data on S3 and B2 buckets ● Automated web crawling to monitor new legislation ● Custom cron jobs on Linux servers for backup and maintenance tasks ● Solving "impossible" problems with custom Ruby gem and Rails patches ● Mass marketing sms campaigns using Twilio API ● Complex custom subscription implementation with Stripe API Technology I work with: ● Ruby on Rails (RoR). Rails 4, 5, 6, 7. ● Hotwire/Turbo ● RSpec/Capybara/Selenium for unit testing and feature testing ● PostgresDB, Mysql ● Heroku, Digital Ocean, AWS EC2 servers ● Heroku staging apps for continuous integration (CI/CD) ● Twilio API, Stripe API ● Google/Facebook/LinkedIn OAuth ● Capistrano, Docker+Kubernetes for deployment ● Wordpress, Shopify ● HTM5L/CSS3 ● JavaScript/AJAX/JQuery/JSON ● ReactJs/Nodejs/Typescript ● Web Scraping ● Linux BASH scripting ● Git, GitHub, Bitbucket, ● Webhooks ● Performance enhancement via algorithm and query optimization I understand the importance of test driven development to ensure a product that is understandable and maintainable for future developers to work on. More time put in up front means far less costs down the road. Fluent in English. Born and raised in the USA.

As a Senior Full-Stack and AI Engineer with 14+ years of experience, I specialize in designing and building scalable web applications, cloud platforms, AI-powered automation systems, and high-performance APIs. I have extensive experience developing enterprise SaaS platforms, CRM/ERP systems, fintech applications, and AI-driven automation solutions using modern technologies such as Python, Node.js, Golang, Java, .NET, Ruby on Rails, React.js, and Next.js. I also work extensively with AI and automation frameworks, building intelligent workflows and LLM-powered applications using tools like LangChain, LangGraph, HuggingFace models, and n8n automation pipelines. Core Technical Expertise AI & Automation LLM integrations (OpenAI, Claude, HuggingFace) LangChain & LangGraph AI workflows Automation pipelines using n8n AI-powered SaaS platforms and content automation systems AI chatbots and intelligent agents Backend Development Python (FastAPI, Flask, Django) Node.js (REST APIs & microservices) Golang microservices Java (Spring Boot) .NET / ASP.NET Core Ruby on Rails Frontend Development React.js and Next.js TypeScript and modern JavaScript frameworks Angular Responsive UI development using Tailwind and Bootstrap Mobile Development React Native cross-platform mobile applications Blockchain Development Solidity smart contracts Ethereum and Web3.js integrations NFT and decentralized applications Cloud & DevOps AWS, Azure, and Google Cloud Docker, CI/CD pipelines Scalable microservices architecture Why Clients Hire Me ✔ 14+ years of professional development experience ✔ Expertise across AI, cloud, full-stack, and blockchain technologies ✔ Proven track record building enterprise SaaS platforms and scalable systems ✔ Strong focus on clean architecture, performance, and maintainable code ✔ Clear communication and reliable project delivery If you are looking for a senior engineer who can build scalable applications, AI-powered solutions, or modern SaaS platforms, I would be happy to discuss your project. Let's connect and bring your idea to life. Thanks, Hitesh Kanwar

In 8+ years, I've shipped SaaS platforms handling 100k+ users, built AI pipelines that eliminated hours of manual work, and helped startups scale from MVP to production-ready infrastructure, without rewriting their stack. Most developers build features. I build systems that hold up under real users, real data, and real growth. What this means for you: - Your backend won't need rebuilding in 6 months - Your APIs will be clean, documented, and maintainable - Your AI integrations will actually work in production, not just in demos - You get honest timelines, clear communication, and full ownership until delivery What I've built: — SaaS platforms with multi-tenancy, billing, role-based access, and usage analytics — AI systems using LLMs, RAG pipelines, and autonomous agents — Real-time applications with WebSockets, event-driven architecture, and live dashboards — Data-intensive platforms with geospatial processing, ETL pipelines, and reporting engines — E-commerce and marketplace backends with payment gateways and inventory systems Core industries: Fintech · SaaS · AI Platforms · Healthcare · E-commerce .Cyber Tech Stack: Backend: Python (Django, FastAPI, Flask), Node.js, Ruby on Rails Frontend: React, Next.js, Vue, TypeScript Mobile: React Native, AI/ML: LLMs, RAG, NLP, AI Agents, Generative AI Cloud & DevOps: AWS, GCP, Azure, Docker, Kubernetes, CI/CD Databases: PostgreSQL, MongoDB, Redis, Firebase, Vector DBs If you're building something serious and need a developer who takes full ownershi, let's talk. I'm available now and respond within a few hours.

Expert Vetted Developer I build conversational AI systems that actually ship, scale, and hold up in production, not demos that break under real traffic. With over a decade in the industry including the last 3+ years focused on conversational AI, I have designed and deployed chatbots and voice assistants that handle millions of messages for startups and enterprise teams across the US, helping them cut support costs, automate lead capture, and run 24/7 customer interactions without adding headcount. What I bring to your project: - Conversational AI & LLM Engineering Production bots with Rasa, Dialogflow, and LangChain. RAG pipelines, intent and entity design, context handling, multi-turn flows, and LLM integrations (OpenAI, Anthropic, open-source models) wired into real business logic, not just a chat window. - Backend & APIs High-performance services in Python with FastAPI. Real-time messaging over WebSockets, Redis for caching, queues, and session state, plus Twilio for SMS, WhatsApp, and voice channels. - DevOps & Scale I ship and own the full pipeline: Docker, Kubernetes, CI/CD with GitHub Actions and Jenkins, deployed on AWS and GCP. Your bot stays fast, monitored, and online as usage grows. Why clients keep working with me: - Clear communication and predictable delivery. You always know status. - I think about cost, latency, and maintenance, not just "does it work today." - Clean, documented, handoff-ready code your team can build on. If you need a conversational AI product or a Python backend built right the first time, send me a message with what you are trying to achieve. I will tell you honestly how I would approach it and what it takes. Available for both fixed-scope projects and ongoing engagements. Skills Conversational AI, Chatbot Development, Python, FastAPI, LangChain, Rasa, Dialogflow, LLM, RAG, NLP, DevOps, Docker, Kubernetes, CI/CD, AWS, GCP, Twilio, WebSockets, Redis, API

🌟🌟🌟🌟🌟 "Bilal didn’t just build an AI AGENT and VOICE BOT for us, he actually took time to understand our Business Use Case first. Then he Designed the Architecture EXACTLY related to our use case and Implemented the AGENTIC AI SYSTEM and VOICE AI. This system is saving us $100k+/month." Most AI agents, voice bots, and automations look incredible in a demo and fall apart the moment real users hit them. They handle the happy path and choke on messy inputs, they're wired together so loosely that one API change kills the whole flow, or they're bolted on instead of integrated, so they create more manual cleanup than they remove. I'm a Claude & Codex Certified AI Engineer who builds production-grade AI agents, voice systems, and automation pipelines that survive real users, real call volume, and real edge cases. And I have receipts. DriverLead.ai, AI Sales + Booking Agents: AI-powered sales, pricing, and booking assistants that turn website visitors into booked appointments in minutes, qualifying leads and closing the gap between first contact and paying customer instead of letting them go cold. Voice AI Interview, AI Voice Screening Platform: An AI voice interview platform that automates candidate screening through real-time conversations and smart response evaluation, so hiring teams screen at scale without burning recruiter hours on first-round calls. VitalSync, Healthcare AI Agent: A healthcare AI agent that automates operations and patient support, from intake to scheduling to follow-ups, so providers spend more time on patient care and less time on the phone. Preptalk, AI Voice Coaching: A realistic AI voice conversation platform that lets users rehearse calls, meetings, and interviews against a responsive AI agent, building real confidence before high-stakes interactions. ✅ How I work: I map your actual workflow first (the call flow, the business process, where leads or time are leaking) before I build anything. I ship a working agent or automation fast, so you can hear real conversations and watch real runs, then give feedback. Then I harden it for production: edge cases, error handling, retries, fallbacks, and logging, so it doesn't break the first time something unexpected comes in. I integrate it into your real stack (CRM, calendar, Stripe, internal tools) so it removes manual work instead of adding a new thing to babysit. As volume grows, I keep optimizing for accuracy, reliability, and conversion. I also take over and fix existing builds: debugging live AI agents and SaaS platforms, stabilizing buggy automations and mobile apps, and resolving API and backend issues fast. ✅ What I build: AI voice agents for inbound, outbound, and missed-call handling (Twilio, VAPI, Retell, ElevenLabs). Agentic systems and AI orchestration (Claude, OpenAI/Codex, Gemini, LangChain, RAG, MCP, structured outputs). n8n automation and workflow pipelines, plus CRM automation. Full-stack SaaS with Stripe billing, multi-tenant architecture, admin panels, and dashboards. Backend and API development (Node.js, Express, Python, FastAPI, REST, webhooks). Mobile apps in Flutter (iOS + Android). Bug fixes, debugging, and stabilization of live AI, web, and mobile products. ✅ Stack: AI & Agents: Claude, OpenAI/Codex, Gemini, LangChain, RAG, LLMs, multimodal models, MCP, structured outputs Voice AI: Twilio, VAPI, ElevenLabs, Retell AI Automation: n8n, Zapier, CRM and workflow automation Machine Learning: PyTorch, TensorFlow, ML Kit, NLP, Computer Vision (MediaPipe) Frontend & Mobile: React, Next.js, Flutter, TypeScript, JavaScript Backend: Node.js, Express, MERN, Python, FastAPI, Firebase, REST APIs, Webhooks Database: PostgreSQL, Supabase, MongoDB, MySQL, DynamoDB DevOps & Payments: AWS, Vercel, GitHub, CI/CD, Serverless, Stripe, RevenueCat If you're shipping an AI agent, a voice system, or an automation that has to work in production, or you've got an existing build that's breaking, send me the brief. Better yet, let's start with a quick strategy call: I'll map out one agent or automation that can realistically pay for itself within 30 days, and I'll tell you honestly if I'm the right fit before we waste each other's time.