Hey there, Thanks for stopping by. You look gorgeous today! Let's do some serious development, so here it is: ### Summary CTO/Senior full-stack engineer with 15+ years building and scaling complex Rails applications end-to-end: product planning, rapid delivery, performance tuning, secure architecture, and production ops. I own outcomes - from first sketch to reliable, observable, autoscaled production running in the cloud. At this moment, over 2 years AI experience, not just "do it", but with understanding how it works under the hood. Just created an AI-driven inventory management app: AzinvSpace, take a look in the portfolio. ### Core strengths * A-Z Delivery: turn fuzzy requirements into clean plan, then to tested Rails features, nice and fast code. * Scalability & performance: Tune with PostgreSQL/Redis, background jobs, caching, N+1 eradication, P95/P99 focus * API design: resilient REST/GraphQL, rate-limiting, idempotency, and observability * Security: OWASP mindset, secure auth (Devise/OAuth2/OIDC/JWT), secrets hygiene(plus a bit more security stuff) * DevOps: Dockerized apps, zero-downtime deploys, repeatable infra, clear runbooks & alerts ### Modern stack, just the most used. I tried to narrow it down, feel free to skip this part :D * Backend: Ruby 3.x, Rails 7.x, Hotwire (Turbo/Stimulus), ViewComponent, Sidekiq, ActionCable * Data: PostgreSQL (13–16), Redis, Elastic/OpenSearch (search & logs) * Frontend: React/Next (when appropriate), Tailwind CSS * Testing/Quality: RSpec, Capybara/System tests (Selenium/Chrome or Playwright), FactoryBot, VCR, RuboCop, Brakeman * CI/CD: GitHub Actions (preferred), CircleCI; containers with Docker/Compose; deploys with Kamal (current) and Capistrano (legacy) * Cloud & edge: AWS (RDS, ECS/ECR, S3, CloudFront), Render, DigitalOcean; NGINX/Traefik * Observability: Sentry, Lograge, Prometheus/Grafana, OpenTelemetry (where supported) * Integrations: Stripe, Twilio, SendGrid/SES, OAuth providers (Google, etc.), Webhooks (robust retry/idempotency) Keywords (ATS-friendly) Ruby, Ruby on Rails 7, Hotwire, Turbo, Stimulus, ViewComponent, Sidekiq, Redis, PostgreSQL, RDS, GraphQL, REST, JSON:API, Docker, Docker Compose, Kamal, GitHub Actions, AWS, Render, NGINX, Traefik, Sentry, Prometheus, OpenTelemetry, Tailwind, TypeScript, React, Capybara, Playwright, RSpec, RuboCop, Brakeman, Stripe, Twilio, OAuth2/OIDC, Webhooks

With a Bachelor’s degree in Computer Science and a Master’s degree in Artificial Intelligence, I am a Full-Stack Engineer who excels in blending theoretical knowledge with practical application. My career of 5 years is built on a solid foundation of industry experience, where I have consistently delivered high-performance, scalable software solutions that meet the complex needs of modern businesses. My extensive background as a Full-Stack Engineer includes impactful roles at Medtryck Sverige AB and EZOfficeInventory. At Medtryck Sverige AB, I was instrumental in refining SaaS-based applications, designing and implementing an advanced Access Control and permissions module, and leading the migration of critical modules to a Neo4j graph database—dramatically improving performance and optimisation. At EZOfficeInventory, I expanded my expertise in both backend and mobile development, contributing to the enhancement of SaaS applications. My work included developing Multi-Server capabilities, designing a CMDB visualized with D3.JS, and integrating essential platforms such as G Suite, SCCM, Zendesk, Jira, and SCIM, significantly boosting ITSM functionalities and ensuring seamless Active Directory interfacing. In addition to my deep technical knowledge, my experience at Beyond Finance has equipped me with the skills to build robust software solutions in the fintech industry, further broadening my engineering and development capabilities. In my recent role as a Postgraduate Research Assistant, I am contributing to an AI-assisted biopolymer development project focused on retrosynthesis, a field that aligns perfectly with my passion for explainable AI. This experience allows me to stay at the forefront of AI innovation while applying these advanced concepts to real-world challenges. I am passionate about leveraging my full-stack engineering expertise to create innovative, efficient, and scalable solutions, while also exploring the possibilities of AI to enhance these systems. If you’re looking for a dedicated professional to bring your project to life, let’s connect and make it happen!

I have built a healthcare platform serving 50,000+ users, a marketing automation SaaS processing $2M+ in transactions, and multiple AI integrated web products, all in production, all still running. I am Zain, a Top Rated Full Stack Developer with 100% Job Success Score and $30K+ in Upwork earnings. I work with startups and product teams who need clean, scalable code and someone who communicates like a professional. 𝗪𝗵𝗮𝘁 𝗜 𝗕𝘂𝗶𝗹𝗱 - AI powered SaaS platforms — LLMs, RAG pipelines, AI agents, LangChain, OpenAI, Claude, vector databases - Full stack web apps — React / Next.js frontend, Node.js / NestJS / Python backend - MVPs for founders — fast to launch, built to scale, no rewrites - Internal tools and workflow automation for growing teams 𝗠𝘆 𝗦𝘁𝗮𝗰𝗸 Front-End Development: ReactJs, Next.js, Vue.js, Nuxt.js, Angular, Bootstrap, Tailwind CSS, TypeScript, JavaScript (ES6+) Back-End Development: Node.js, NestJS, Express.js, Python, FastAPI, Django, Flask, Ruby on Rails, PHP (Laravel), RESTful APIs, .NET / ASP .NET Core Databases & Data Stores: MongoDB, MySQL, PostgreSQL, SQLite, Redis, Firebase, Oracle Cloud, DevOps & Infrastructure: AWS, Microsoft Azure, Google Cloud Platform, Docker, Kubernetes, CI/CD Pipelines AI & Automation: Python, ChatGPT / OpenAI APIs, Claude, Gemini, NLP, AI Chatbots, LLM Integration, Prompt Engineering, AI Agents AI-Assisted / Vibe Coding Tools: Cursor, GitHub Copilot, Claude Code, Codex, AI assisted refactoring, AI driven test generation Development & Deployment Tools: Git, GitHub, GitLab, Docker, Vercel, Netlify, AWS 𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝗲 - Code that's actually maintainable, not hacked together - Clear timelines and honest communication throughout - Long term mindset. I build systems that scale, not quick fixes - AI integration that's production grade, not experimental ⭐ “Zain did an amazing job developing my Freshdesk application! Working with him was a fantastic experience. I was initially uncertain since he’s a new freelancer, but his dedication and expertise proved he’s truly passionate and skilled.” ⭐ “I had the pleasure of working with Zain and was consistently impressed by his dedication, clarity of thought, and collaborative spirit. He’s incredibly competent and knowledgeable, with a unique approach to solving problems that brings a fresh perspective. I wholeheartedly recommend him and look forward to his continued success!” ⭐ “Working with Zain is a great experience. His professionalism, clear communication, and commitment to delivering high quality solutions make him a reliable partner. I highly recommend him for his expertise and dedication.” If you are building a SaaS product, scaling an MVP, or adding AI to your web app — send me a message with what you are working on. I will tell you honestly whether I am the right fit and exactly how I would approach it.

Most AI agents fall apart when they hit real business logic. Mine don't. As a Senior AI Developer and AI Engineer, I build autonomous systems that cut manual workflows by up to 85% — the kind your team will wonder how they ever lived without. 📩 Send your brief — I'll reply within 2 hours with a concrete action plan. 🏆 Why work with me? 🥇 Senior AI Developer and OpenAI developer with a track record of production-ready systems. 🥇 Expert AI Agent architect, agentic AI developer, and AI agent saas specialist delivering 10x ROI across SaaS, E-commerce, and Fintech. 🥇 Top-Rated AI Chatbot Developer — OpenAI developer, Bolt AI Developer, chatbot developer, and GPT-4 expert. 🥇 AI voice chatbot and AI voice assistant builder — AI voice VAPI, AI phone agent, and AI call agent systems that work 24/7. ❇️ Custom AI Agent & Autonomous Systems As a dedicated AI Developer, I build robust business logic — not wrappers. My AI Agent architecture relies on LangChain, LangGraph, and CrewAI. As an AI Developer with LangChain and Zapier expertise, I connect AI agent automation workflows to Slack, Shopify, and enterprise backends. Every AI Agent doubles as a 24/7 AI sales agent. As a Bolt AI Developer and AI web developer, I ship AI agent saas systems with front-end developer AI interfaces. As an OpenAI developer and generative AI agent specialist, the OpenAI API, GPT-4, and ChatGPT sit at the core of every AI Agent build. My AI agent python and AI agent n8n experience covers every layer of the automation stack. ❇️ AI Voice Chatbot, AI Phone Agent & AI Call Agent As an AI voice chatbot and AI voice assistant specialist, I build AI voice VAPI systems, AI phone agent flows, and AI call agent pipelines for sales, support, and AI agent real estate. My AI voice chatbot covers AI voice clone, AI voice chat, AI voice call, and WhatsApp AI chatbot channels. My AI agent real estate deployments use AI phone agent flows to qualify leads 24/7. ❇️ AI Chatbot Developer, LLM Engineering & AI Agent RAG As an AI Chatbot Developer, I build bots for WhatsApp, Telegram, and Web — GPT chatbot, OpenAI chatbot, and Telegram chatbot solutions. As a chatbot developer and AI bot developer, I integrate GPT-4, ChatGPT, and LLM backends. My AI agent rag and advanced RAG pipelines rely on Pinecone, Weaviate, and Milvus. As a Generative AI Developer, I handle LLM prompt engineering for OpenAI, Anthropic, and Llama. Medical documentation agent AI RAG is a specialist engagement for healthcare clients. ❇️ AI Agent for Sales, CRM & Digital Marketing Automation As an AI Agent architect and AI Backend Developer, I build AI sales agent and business development automation covering HubSpot marketing automation, Zoho marketing automation, digital marketing automation, YouTube automation, and social media marketing automation via API integration Python. My AI agent real estate and AI agent marketing work covers full-funnel automation pipelines. ❇️ Machine Learning, AI Deep Learning & Data Science As a machine learning expert, AI deep learning specialist, and data scientist, I build computer vision models using PyTorch and TensorFlow. My work covers Python data analysis, AI data analytics, Python web scraping, and AI classifier builds. As a Python full stack developer and AI app developer, I handle API integration Python, analytics engines, and AI model training. ❇️ AI SaaS, Full Stack AI & Enterprise As a Full Stack AI SaaS Developer, Bubble Developer AI, and iOS Developer AI, I build web application platforms and mobile AI. For Enterprises: multi-agent systems for 500k+ users and AI voice chatbot for enterprise sales. For Startups: AI Chatbot Developer and Python full stack developer shipping AI Agent and AI phone agent fast. For Deep Tech: AI deep learning, AI agent rag, and medical documentation agent AI RAG made actionable. Why should you hire me as an AI Developer? ▪ 7+ years as an AI Developer, Python developer, and machine learning expert across SaaS, Fintech, and Enterprise. ▪ $70K+ earned | 100% Job Success Score — production-ready AI systems, zero failed deployments. ▪ Expert in LangChain, LangGraph, CrewAI, OpenAI API, GPT-4, and Pinecone. ▪ 50+ AI agent and AI chatbot builds — from enterprise SaaS automation to AI agent real estate pipelines. ▪ 5+ production RAG systems and AI agent python pipelines cutting manual workflows by 85%. ▪ AI agent saas, AI phone agent, AI call agent, WhatsApp AI chatbot — cross-platform AI systems. ▪ AI developer, agentic AI developer, AI chatbot developer, AI voice assistant, AI agent RAG, generative AI agent, AI LLM developer ▪ Medical documentation agent AI RAG, digital marketing automation, HubSpot automation — full-funnel AI. ▪ AI deep learning, machine learning, and data scientist work powering every AI agent and AI SaaS build. ▪ AI Developer contracts with 100% Job Success. Looking for an expert AI Developer? Let us connect!

I build full stack web apps, Shopify stores, and SaaS products that actually shi on time and within budget. With 5+ years of development experience, I've launched 40+ projects across e-commerce, SaaS, and startup spaces. I specialize in fast, scalable development using React, Next.js, Node.js, Python, and Django. What I typically build: • Shopify stores & apps : custom themes, conversion optimization, automation • SaaS MVPs & products : from concept to first paying customer • React/Next.js web apps : responsive, fast-loading, production-ready • APIs & backend systems : REST APIs, database design, payment integration (Stripe) • AI integrations : OpenAI, Claude, Gemini API connections into existing apps Why clients choose me: ✓ Fast turnaround : I prioritize shipping working code over perfect code ✓ Clear communication : weekly status updates, responsive to feedback ✓ Production-ready quality : deployed to AWS, tested, and documented ✓ Startup experience : I get that budgets matter and deadlines are real Tech stack: React · Next.js · Node.js · Python · Django · FastAPI · PostgreSQL · Stripe · AWS · Docker I work best on: fixed-price projects under $15k (fast scope, clear deliverables), hourly retainers for ongoing work, and MVP launches from design to live product. Let's build something that works.

DevOps Engineer with more than 10 years of experience in Ruby on Rails in a startup company. I have a bachelor degree in Computer Science. I have experience in configuring and managing kubernetes specifically Digital Ocean's k8s, and docker swarm.

I care more about writing reliable, readable, and maintainable code. I've worked with Ruby the most, but have also worked in frontend development with the help of HTML, CSS, and Javascript. I am a well-trained and self-motivated Rails developer with over 6 years of experience and diverse skills including knowledge in AWS, a sharp eye for wisdom, eager to learn new technologies and the ability to host a clean code using Heroku, Cloud66, Digital Ocean, etc. Since I have seen the framework from version 3 to present version 6 I can solve any problem that arises regarding the code and my work will be compatible with all types of systems. Keeping in mind the client’s satisfaction, time, budget, and quality I pay a lot of attention to the work I have been involved in. Skillsets: ✓ Ruby on Rails framework 3.x to 6.x version ✓ FrontEnd (HTML, CSS, Javascript, ReactJS, AngularJS) ✓ Databases (MySQL, PostgreSQL, Redis, NoSQL) ✓ Hosting (Heroku, Cloud66, AWS, Digital Ocean, DNS services like GoDaddy) ✓ AWS services (EC2, EBS, RDS, S3, Cloudfront etc.) ✓ Version Control tools (Git, GitHub, Jira, bitbucket and others) ✓ Third-party services (Shopify, Spree, Stripe, Open Cart, Sharetribe, Spree, etc.) ✓ Analytic tools (Google Analytics, New Relic, Scout app, etc.) ✓ API tools (Apiary, Postman)

I'm an expert React Native / Ruby on Rails developer with 8+ years of experience ✅ TOP 10 on Upwork (Top Rated Plus badge) ✅ Seasoned Ruby on Rails & React Native developer (8+ years) ✅ 5.4K+ completed hours I have been working with a number of projects with a range of different domains, such as Restaurant/Food ordering, Taxi Booking, Dating, LMS & Ed tech, Fintech and many more to mention. Expert in developing and maintaining Mobile apps for iOS & Android. Expert in developing and maintaining back-end using Ruby on Rails I personally believe in quality and always prefer to work with high levels of quality. Skills that I master: ✔ React Native ✔ Ruby on Rails ✔iOS ✔ Android ✔ MySQL ✔ HTML/CSS ✔ Bootstrap ✔ REST API Comfortable working on existing projects Available from 9:30 am to 7:00 pm Indian Standard time. Book a meeting with me. Let's discuss your project and bring it to reality

5+ years as a Ruby on Rails web developer. I've been working with: - Github; - Stripe integration; - HTML, CSS3; - Postgres; - Linux systems; - Bootstrap; - CSS components; - Elastic Search; - Heroku; - RESTful APIs; - Active Model Serializer; - Testing with RSpec; - Circle CI; - Sidekiq; - AWS; - SQL. As a web developer, it would be a pleasure to find a suitable solution for your problem through technology.

We build scalable, production-ready SaaS platforms and AI-powered web applications for startups and growing businesses. Our focus: architecture, performance, AI integration, and long-term scalability. Over 80+ products delivered across Healthcare, Education, Logistics, eCommerce, Marketplaces, and Enterprise systems. 💡 Core Expertise 🔹 Full-Stack Development - Node.js, NestJS - Next.js (SSR, ISR, Edge) - Ruby on Rails - React.js, Angular, Vue - React Native (hybrid mobile apps) 🔹 AI & Automation - OpenAI API (GPT-4, Assistants, Function Calling) - AI SaaS platforms - Retrieval-Augmented Generation (RAG) - AI chatbots & copilots - NLP & AI-powered personalization - AI workflow automation - AI-driven APIs 🔹 Architecture & Infrastructure - Multi-tenant SaaS - High-load backend systems - REST & GraphQL APIs - SQL / NoSQL databases - CI/CD pipelines - Performance optimization 🤖 Our Proprietary AI Platform – Bridge We built Bridge, our internal AI Agent development framework. Bridge enables: - RAG pipelines for knowledge assistants - Secure ingestion from PDFs, CRMs, APIs - AI copilots for SaaS products - Multi-channel deployment (chat, web, internal tools) - MCP server creation - Modular and scalable AI architectures This allows us to deliver AI features faster and more securely than most teams. ⚡ Our Acceleration Advantage We use our own production-proven boilerplate. BC Next.js + NestJS Boilerplate helps: - reduce development time - ensure clean architecture - speed up MVP launches - maintain scalability from day one Even other agencies use it. 🧠 How We Work Deep product discovery Architecture design & tech stack validation Sprint-based Agile development Transparent daily communication Automated testing & QA Production deployment & scaling support We think like product owners, not just developers. 🎯 Why Clients Choose Us Strong backend architecture skills Real SaaS experience (not landing pages) AI-first mindset Clean, maintainable code Excellent communication Long-term partnership approach If you're building: - AI SaaS - Marketplace - Telehealth system - ERP/CRM platform - Multi-tenant dashboard - Custom AI assistant - Scalable web app Let’s talk! We offer a free technical consultation and architecture review. Additional Expertise: HTML5, CSS3, Sass, Scss, Responsive Web Design, Cross-Browser Compatibility, Web Accessibility, SEO Optimization, Frontend Architecture, Query, Angular, Vue.js, Ember.js, Web Components, Progressive Web Apps (PWA), Single Page Applications (SPA), Server Side Rendering (SSR), Client Side Rendering (CSR), API Integration, GraphQL, RESTful APIs, Web Performance Optimization, Browser DevTools, Git, GitHub, Webpack, Gulp, npm, yarn, Visual Studio Code, Sublime Text, Atom, Responsive Images, Lazy Loading Images, Code Splitting, Error Handling, Debugging, Agile Methodologies, Scrum, Kanban, Continuous Integration and Deployment (CI/CD)