I’m a seasoned Software Engineer specializing in Rails and Angular, with a robust track record of engineering innovative web solutions for businesses ranging from startups to large enterprises. My deep expertise in web development is complemented by years of experience where I've consistently delivered projects that meet and exceed client expectations. As a Development Manager, I excel in leading diverse teams through the complexities of software projects, ensuring we stay on track with timelines and budgets. My leadership is defined by clear communication, collaboration, and an unwavering commitment to fostering an environment ripe for innovation. This approach has consistently resulted in high-performing teams and stellar project outcomes. I pride myself on being at the forefront of web development, constantly integrating the latest technologies and trends to ensure every solution is scalable, secure, and maintainable. My meticulous attention to detail means that I deliver solutions that are not only robust and functional but also visually appealing. Beyond technical prowess, my interpersonal skills stand out. I build and maintain strong relationships with clients and team members alike, which helps in crafting tailored solutions that truly resonate with user needs. I am committed to continuous learning and staying ahead in a fast-evolving industry, reflecting my passion and dedication to the field. I am here to bring your vision to life with cutting-edge solutions that are meticulously crafted and executed. Let's collaborate to create something extraordinary!

I'm a software engineer with 8 years of experience building mobile and web applications using React, React Native / Expo, Node.js, Supabase, Firebase, and Ruby on Rails. Over the years, I've worked on more than 30 professional projects across a variety of industries, gaining extensive experience building user-facing products from idea to production. While I have a strong technical foundation, I'm also highly product-focused. My goal is not simply to write code, but to build products that solve real problems, deliver value to users, and drive actual business revenue. I believe the best products are built iteratively. Rather than overengineering solutions, I focus on identifying the core features that create the most value, delivering them quickly, and establishing a solid foundation that can evolve as the product grows. When I'm not working on client projects, I'm building my own applications. That hands-on experience of designing, shipping, and iterating on products gives me a practical understanding of both the technical and product side of software development, which helps me work effectively with founders and entrepreneurs. I work mainly with Claude Code, which allows me to develop much faster and offer competitive pricing while still delivering high-quality work. Do not hesitate to reach out to discuss your project(s)! Best regards, Karim

I am a full-stack web developer specializing in back-end development with Ruby on Rails. I can help bootstrap your product from scratch or get your MVP to the next level with my passion for clean code. I have been working in web development for almost 10 years, but I'm always trying to stay on the edge of the industry and constantly improving myself. Throughout my career, I've developed a diverse skill set: ● Ruby on Rails (e.g., dry-rb, view components, active record/arel) ● Hotwired (Turbo, Stimulus) ● PostgreSQL, MySQL, MongoDB ● GraphQL, JSON:API, REST ● DevOps: Nginx, Passenger, AWS (EC2, EB, ESC), Serverless AWS Lambda, CI/CD ● JavaScript / TypeScript ● React.js (with various STM: redux/effector/reatom/zustand), React Native, familiar with Vue.js ● CSS (Tailwind/Sass) ● HTML (Pug/Slim/Erb/JSX) ● Git/SVN ● API: AWS, DigitalOcean, ChatGPT, Google, MS Graph, MS BotFramework, Facebook, Geth Let me share a bit about my journey. I started my career as a back-end developer, dedicating 3 years to creating robust and efficient server-side solutions. However, my curiosity and drive led me to explore the front-end, where I discovered my love for building stunning user interfaces that captivate and engage. Since then, I've been working as a full-stack developer, merging my back-end expertise with my front-end creativity to deliver comprehensive solutions

I build production-ready AI Agents, AI Automation, and Full-Stack AI SaaS products using Python, Claude, and OpenAI. With 9+ years of full-stack engineering experience, I take AI ideas from MVP to a scalable product. I design the agent logic, backend APIs, integrations, dashboards, and deployment, so you do not need separate AI and full-stack developers. Need an AI Agent, Voice AI Agent, RAG chatbot, multi-agent workflow, or Multi-Tenant SaaS platform? I architect it, build it, and hand it over tested, documented, and ready for production. --- WHAT I BUILD --- - AI Agents and AI Automation for support, sales, operations, lead qualification, data extraction, and internal workflows - Custom Chatbot and RAG-based AI bots for grounded answers over documents, websites, and business knowledge - Voice AI Agents, Voice-to-Voice systems, and Sales AI Receptionists for inbound calls, qualification, booking, follow-up, and WhatsApp Bot Integration - Multi-Tenant SaaS platforms with authentication, roles, dashboards, billing, APIs, and workflow automation - Agent orchestration and Multi-Agent Systems with LangGraph, LangChain, CrewAI, AutoGen, MCP, tool calling, structured outputs, and human-in-the-loop controls - LLM integrations with Claude, OpenAI API, Claude Code, Prompt Engineering, model routing, embeddings, vector databases, pgvector, and evaluation-aware workflows - Full-stack delivery with Python/FastAPI, Node.js, React, Next.js, TypeScript, Tailwind CSS, PostgreSQL, Supabase, Docker, GitHub, AWS, Vercel, Stripe, Twilio, and n8n - API Development, API Integration, Backend Refactoring, Audio Processing, and scalable REST API architecture for production systems --- PROJECT EXPERIENCE --- - AI Workforce SaaS: multi-organization scheduling, HR, CRM, payroll, billing, RAG knowledge base, AI communications, and predictive operational alerts - Voice AI SaaS: multi-tenant voice agents with LangChain, LangGraph, RAG, knowledge bases, CRM integrations, analytics, and a Claude-based copilot - Operations Automation: real-time task allocation, workflow automation, optimization services, GraphQL APIs, and dashboards - Healthcare, donor-management, and booking SaaS platforms built with Python, FastAPI, PostgreSQL, React, and secure multi-tenant architecture --- INDUSTRIES I HAVE DELIVERED FOR --- - SaaS Startups • Healthcare • Real Estate • Finance • Car Dealerships • Restaurants • E-commerce --- HOW I WORK --- As a Python Developer and FastAPI Developer with 8+ years of experience, I build Agentic AI systems, agent pipelines, and API workflow automation including Function Calling, Structured Outputs, Model Routing, and Embeddings. As a Senior Full-Stack Engineer with 9+ years of experience, I build scalable web applications using React, TypeScript, Node.js, NestJS, and Next.js with clean REST API architecture and production-ready deployment on Vercel and AWS. As a Senior Full Stack Engineer, I deliver clean architecture and full team handoff documentation. --- WHAT YOU GET --- - Clear architecture before build - Production-ready backend, frontend, APIs, and integrations - Secure authentication, role-based access, and maintainable data design - Clean documentation, practical cost controls, and reliable handoff - An MVP that can grow into a stable SaaS product --- WHY CLIENTS CHOOSE ME --- - 9+ years as a Full Stack and Python Developer across AI systems, SaaS platforms, and backend APIs - Senior Full Stack Engineer and FastAPI Developer for architecture, AI backends, and execution - Deep knowledge of Function Calling, Structured Outputs, Model Routing, and Embeddings - 9+ years across React, TypeScript, Node.js, and Python, both stacks, one developer - No black boxes, no guesswork, always documented - Delivered across 7+ industries: SaaS Startups, Healthcare, Real Estate, Finance, Car Dealerships, Restaurants, E-commerce --- WHOM I WORK BEST WITH --- Founders and product teams building AI products, AI automation, agentic workflows, RAG systems, Voice AI, or AI-enabled SaaS. I am a strong fit when you need one engineer to connect AI logic, product UI, backend services, data, and deployment. If you are building an AI Agent, AI Automation system, Voice AI Agent, RAG product, or AI SaaS platform, send me your project details.

𝗜'𝘃𝗲 𝗯𝘂𝗶𝗹𝘁 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝘀 𝘁𝗵𝗮𝘁 𝗲𝘅𝗶𝘁𝗲𝗱 𝗳𝗼𝗿 $𝟲𝟱𝗠, 𝘀𝗰𝗮𝗹𝗲𝗱 𝗽𝗮𝘀𝘁 𝟭𝟬 𝗺𝗶𝗹𝗹𝗶𝗼𝗻 𝗱𝗮𝗶𝗹𝘆 𝘂𝘀𝗲𝗿𝘀, 𝗮𝗻𝗱 𝗵𝗲𝗹𝗽𝗲𝗱 𝗳𝗼𝘂𝗻𝗱𝗲𝗿𝘀 𝗿𝗮𝗶𝘀𝗲 $𝟱𝟬𝗠 𝗶𝗻 𝗳𝘂𝗻𝗱𝗶𝗻𝗴 𝘀𝘁𝗮𝗿𝘁𝗶𝗻𝗴 𝗳𝗿𝗼𝗺 𝗻𝗼𝘁𝗵𝗶𝗻𝗴 𝗯𝘂𝘁 𝗮𝗻 𝗶𝗱𝗲𝗮 𝗮𝗻𝗱 𝗮 𝘄𝗵𝗶𝘁𝗲𝗯𝗼𝗮𝗿𝗱. I have helped startups, businesses, scale-ups and enterprises develop AI driven SaaS MVPs, full-stack web apps, front-end, back-end, Chrome extensions, Shopify stores, AI chatbots, AI Agents, AI driven automations, generative AI and cloud architectures. I've spent that time in the messy middle of real products, some of what I've shipped and scaled: - Kalpa, which exited for $65M - InstantlyAI, now doing $20M in annual recurring revenue - Box, valued at $4.74B - PermissionAI, which raised $15M - STADS, used by FIFA teams - Schoolmaker, with 450K+ learners - Edaider, Sweden's top EdTech platform - A Shopify storefront handling 2M+ users and £21M+ in sales - A database with 200M+ records across 200+ tables - A monolith broken down into 50+ microservices without downtime My goal is simple: build clean, scalable systems that won’t fall apart when users, data, or revenue grow. 🔥Delivered 50+ production-grade systems across AI, SaaS, automations, and browser extensions 🔥Partnered with non-technical founders to architect and build SaaS MVPs from scratch 🔥Helped multiple founders launch revenue-generating MVPs in under 8–12 weeks 🔥Programmatic technical SEO for web & SPA 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗦𝗸𝗶𝗹𝗹𝘀 𝗜 𝗯𝗿𝗶𝗻𝗴 🔹Frontend: JavaScript (ES6, ES7, Typescript), Next.js, React, Vue, TailwindCSS, ShadCN, Chakra, Svelte 🔹Backend: Node.js (Express, Fastify, NestJS), Python (Django/FastAPI), Ruby on Rails, REST, GraphQL, gRPC, WebSockets, Server-Sent Events, JWT, OAuth2, Role-based auth 🔹Mobile Apps: React Native & Flutter 🔹Databases: PostgreSQL, MySQL. MongoDB, Firestore, Redis, DynamoDB, Supabase, Prisma, Drizzle, TypeORM 🔹Cloud & DevOps: AWS (Lambda, EC2, S3, CloudFront), Azure (Functions, Cosmos, Blob Storage), GCP, Vercel, Digital Ocean, Netlify, Render, Cloudflare (Workers, KV, R2), Docker + container orchestration, Cloudflare Workers + KV, CI/CD (GitHub Actions, GitLab, Bitbucket) 🔹AI/ML/NLP/LLM: OpenAI (GPT-4, GPT-4o, GPT-5, Assistants API), Anthropic Claude, Gemini, Groq, Llama, Weaviate / Pinecone / Chroma DB, RAG pipelines, embeddings, vector stores, LangChain, LangGraph, CrewAI, Fine-tuning, prompt engineering, AI-powered agents & automation 🔹Automation: Zapier, Make, n8n, Retool, Puppeteer, Playwright, Selenium, Scrapy, BeautifulSoup, API monitoring, bots, schedulers 🔹Low-Code & No-Code Development: Bubble, FlutterFlow, Webflow, Bolt, Lovable 🔹AI-Driven Coding / Copilot Tools: GitHub Copilot / Copilot X, OpenAI Codex, Claude / Claude Code 🔹eCommerce: Custom themes & apps, Shopify Hydrogen / Liquid, Stripe, PayPal, Paddle, LemonSqueezy, Subscription events, usage billing 🚀 How I Work ✔ Professional communication with clear milestones ✔ Clean, scalable, well-documented code ✔ Product-focused thinking to provide real-world results ✔ Fast MVP delivery without compromising structure ✔ AI-first mindset where automation adds measurable value ✔ Full responsibility from architecture to launch Send a message and let’s discuss your project goals! Keywords: Full-stack Development, Frontend, Backend, AI/ML, Chatbots, Chrome Extensions, Web Apps, Mobile Apps, AI App Development, AI Agents, Penetration testing, Low-code/no-code development, Workflow Automations, SAAS MVPs.

🌟🌟🌟🌟🌟 "Zubair didn't just build an AI Agent for us. He invested time in understanding our business model, customer journey, and operational challenges before proposing a solution. The AI Agent and Voice AI system he delivered was tailored to our exact workflow, integrated seamlessly with our tools, and quickly became a critical part of our operations. The impact was immediate, measurable, and substantial." Most AI agents look impressive during a demo but struggle in real-world environments. They fail when users ask unexpected questions, integrations change, or business processes become more complex. That's where I come in. I'm a Claude & Codex Certified AI Engineer specializing in AI Agents, Voice AI, Automation Systems, and Full Stack SaaS Development. I help businesses automate operations, improve customer experiences, increase conversions, and reduce manual work through reliable AI solutions built for production. My approach is simple: understand the business first, then build the technology around it. 🚀 Featured Projects DriverLead.ai Built AI sales and appointment booking agents that engage visitors, answer questions, qualify leads, provide pricing information, and schedule appointments automatically. VoiceHire Developed an AI voice interviewing platform that conducts candidate screenings, evaluates responses in real time, and helps recruiters identify qualified candidates faster. VitalSync Created a healthcare AI assistant that automates patient intake, appointment scheduling, follow-ups, and operational workflows, allowing providers to focus on patient care. PrepTalk Built an AI voice coaching platform that helps users practice interviews, sales conversations, presentations, and customer interactions through realistic AI conversations. ✅ What I Build AI Voice Agents (Twilio, Vapi, Retell, ElevenLabs) AI Agents & Agentic Workflows (Claude, OpenAI, Codex, Gemini, LangChain, RAG, MCP) n8n Automation & Business Process Workflows CRM, Lead Management & Appointment Booking Automation Full Stack SaaS Platforms with Admin Panels & Dashboards Backend Development, APIs, Integrations & Webhooks Mobile Applications (Flutter, iOS & Android) AI, Web & Mobile App Debugging and Optimization My process starts with understanding your workflow, identifying bottlenecks, and mapping opportunities for automation. From there, I design and implement solutions that integrate directly into your existing systems and deliver measurable business value. Whether you're launching a new AI product, automating internal operations, building a Voice AI solution, or fixing an existing system that's causing problems, I can help. Send me your project details, and let's discuss how AI can create real business impact for your organization.

Hey, happy to meet you on my profile! 😊 My name is Irina, and I’m proud to be a part of PettersonApps - a fast-growing software development company with over 10 years of experience delivering web, mobile, OTT, and custom digital solutions for clients worldwide. Over the years, we’ve partnered with startups, scale-ups, and enterprise companies across different industries, helping them build, improve, and scale their products with reliable development teams and transparent communication. Today, our team includes 150+ specialists covering the full product development cycle - from discovery and UI/UX design to development, QA, release, and ongoing support. Our expertise includes: ✅ Mobile app development (iOS, Android, Flutter, React Native) ✅ Web development (React, Next.js, Node.js, PHP, etc.) ✅ OTT platforms (Roku, tvOS, Android TV, Apple TV) ✅ AI/ML-powered solutions ✅ Unity development (AR/VR experiences & games) ✅ UI/UX design ✅ QA & testing support ✅ Dedicated project management and delivery support Whether you need support at a specific development stage or a full cross-functional team to take care of your project end-to-end, we’d be glad to help. I always aim to build long-term, transparent partnerships and make the collaboration process smooth and comfortable for clients. Feel free to reach out. I’d love to discuss your requests/requirements and answer any questions 📩

Python. Django. FastAPI. AWS. 10 years building AI-integrated SaaS platforms that ship to production and stay there. 100% Job Success. Top Rated Plus. 7,000+ hours delivered. $100K+ earned on Upwork. I build the backend, wire in the AI, deploy on AWS, and keep it running. One engineer accountable for the full stack no coordination overhead, no surprises. 𝐑𝐄𝐂𝐄𝐍𝐓 𝐃𝐄𝐋𝐈𝐕𝐄𝐑𝐘 - AI sales intelligence platform (Impact Intelligence) - Python backend, LLM pipeline, real-time analytics on AWS - AI resume builder (AI-Resyme) - OpenAI API + voice features, deployed to production in 90 days - Full-stack SaaS platform - 1,029-hour sustained engagement across 2 years of continuous feature delivery - AWS-connected web application - PostgreSQL + cloud infrastructure maintained over 1,185 hours - Backend MVP for directory platform - scoped and shipped within a 30-day deadline 𝐖𝐇𝐀𝐓 𝐈 𝐁𝐔𝐈𝐋𝐃 𝐏𝐘𝐓𝐇𝐎𝐍 & 𝐀𝐈 𝐃𝐄𝐕𝐄𝐋𝐎𝐏𝐌𝐄𝐍𝐓 LLM chatbots and RAG pipelines using OpenAI, Claude, and LangChain. Document processing, AI-powered search, and intelligent workflows connected to your CRMs, APIs, and databases. Python, Django, FastAPI, Flask, Celery. 𝐒𝐀𝐀𝐒 & 𝐅𝐔𝐋𝐋-𝐒𝐓𝐀𝐂𝐊 𝐃𝐄𝐕𝐄𝐋𝐎𝐏𝐌𝐄𝐍𝐓 Full-stack SaaS platforms with Python backend and React frontend. Auth, Stripe billing, dashboards, REST APIs, and third-party integrations built from day one. I work well on existing codebases, not just greenfield projects. 𝐃𝐄𝐕𝐎𝐏𝐒 & 𝐂𝐋𝐎𝐔𝐃 AWS deployments with Docker, ECS, EC2, RDS, and S3. CI/CD pipelines for automated builds and deploys. Database architecture that scales. One engineer accountable for code, infrastructure, and uptime. 𝐓𝐄𝐂𝐇 𝐒𝐓𝐀𝐂𝐊 Backend: Python, Django, FastAPI, Flask, Celery, Redis Frontend: React, TypeScript, Next.js Cloud: AWS (ECS, EC2, RDS, S3, Lambda), Docker, CI/CD AI/LLM: OpenAI API, Claude API, LangChain, RAG pipelines, vector databases Database: PostgreSQL, MySQL, MongoDB Automation: n8n, webhook integrations, Zapier 𝐖𝐇𝐎 𝐓𝐇𝐈𝐒 𝐖𝐎𝐑𝐊𝐒 𝐁𝐄𝐒𝐓 𝐅𝐎𝐑 - Founders who need Python, AI, and AWS handled by one engineer without hiring a team - Engineering leads who need a reliable senior Python contractor for an ongoing engagement - Startups adding LLM features or RAG pipelines to an existing product - Teams that need a backend built fast and deployed correctly on AWS Send me your requirements. I will confirm scope, timeline, and fit in one conversation.

10+ Years Experience | Secure • Scalable • Business-Focused With 10+ years of experience, I help businesses build, secure, and scale their digital presence. Whether you need a high-performing website, an eCommerce store, a SaaS platform, or secure IT and cybersecurity support; you're in the right place. I bring a unique blend of Full Stack Development and IT/Cybersecurity expertise, allowing me to deliver solutions that are not only visually appealing but also fast, secure, compliant, and reliable. Web & Application Development ➤ Custom Websites & Web Applications ➤ E-Commerce (Shopify, WooCommerce, Wix, Squarespace, Webflow) ➤ WordPress (Elementor, WPBakery, Flatsome) ➤ Figma / PSD / XD to WordPress or Shopify ➤ Payment Gateway Integration & SEO Optimization IT, Cybersecurity & Healthcare Services ➤ HIPAA-Compliant Cybersecurity & Risk Management ➤ Managed IT & Secure Network Infrastructure ➤ Revenue Cycle Management (RCM) & Healthcare IT Support ➤ Cloud, EHR Integration & MSP Services Proven Experience ✔ 215+ WordPress & 145+ Shopify projects ✔ SaaS & IT solutions for US-based industries ✔ Managed IT & cybersecurity for healthcare organizations If you’re looking for a reliable expert who understands both technology and security, let’s connect and build something that works and lasts.

I am a senior software engineer and have completed my Masters in Computer Sciences from LUMS university. I've been working on Ruby on Rails since 2016 with over 7 years of expertise in the field. I have a proven track record of delivering high-quality, scalable, and maintainable web applications. I also make sure to be updated with the latest cutting edge technology so that I stay up-to-date with the latest developments in the field. I have experience in working with startups where I build their applications in monolithic architecture from scratch till delivery. I have also worked with large scale application involving multiple microservices managed by large number of employees working in different departments . I've worked on different web apps written on various platforms (including Vue.js, React.js, Knockout.js, Node.js, and Laravel), but I'm more focused on Ruby on Rails, Vue.js, and React.js. Tech Stack: ✅ Ruby on Rails (ROR); ✅ React.js and Vue.js; ✅ Node.js; ✅ JavaScript; ✅ Angular JS ✅ GraphQL Databases: ✅ PostgreSQL ✅ MongoDB Mobile Development: ✅ Android ✅ React Native Payment Gateways: ✅ Stripe ✅ Paypal ✅ BrainTree AWS Stack: ✅ S3 ✅ ElasticBeanstalk ✅ EC2 ✅ Elasticsearch ✅ Routes 53 Email/Mobile Integration: ✅ AWS SES ✅ Sendgrid ✅ Twillio Background Process: ✅ Sidekiq ✅ Redis ✅ SuckerPunch I can work either in your team or independently. I am a team player and also have the ability to work under pressure and carry the team to success. I am fluent in English as I have prior experience of working with US and EU clients in a remote manner. I am looking for opportunities to work on exciting projects, learn new skills, and grow as a developer. I believe in strong communication with my clients.