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Mujtaba A.
$35/hr
100% Job Success
$300K+ earned
Available now
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⚡ Need to launch fast? I help startups and businesses transform ideas into scalable AI-powered web and mobile products—often in weeks, not months. With 15+ years of experience and a 100% Job Success Score, I build intelligent solutions that combine AI, automation, web, and mobile technologies to solve real business challenges and drive measurable growth. As a Fractional CTO and Full-Stack Engineer, I partner with founders and teams to architect, develop, and scale: 🚀 • SaaS Platforms 🤖 • AI Products & Intelligent Applications 📱 • Mobile Apps (iOS & Android) ⚙️ • Automation Systems & Workflows 🏢 • Enterprise Solutions From MVPs to production-ready platforms, I focus on clean architecture, business outcomes, performance, security, and long-term scalability. ## 🤖 𝗖𝗢𝗥𝗘 𝗘𝗫𝗣𝗘𝗥𝗧𝗜𝗦𝗘 ### 🧠 𝗔𝗜 & 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 • AI Applications, Agents, and Chatbots • AI Automation and Workflow Systems • Business Process Automation • Retrieval-Augmented Generation (RAG) • Prompt Engineering and AI Consulting ### 💻 𝗙𝘂𝗹𝗹-𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 • React, Next.js, Angular • Node.js, NestJS, FastAPI, Python • Scalable Web Applications and SaaS Platforms ### 📱 𝗠𝗼𝗯𝗶𝗹𝗲 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 • React Native and Expo • Cross-Platform iOS and Android Apps • Mobile App Architecture and Deployment ### ☁️ 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 & 𝗖𝗹𝗼𝘂𝗱 • Multi-Tenant SaaS Systems • API Integrations and Third-Party Services • AWS, Docker, CI/CD Pipelines • Scalable Cloud Infrastructure ### 🎯 𝗟𝗲𝗮𝗱𝗲𝗿𝘀𝗵𝗶𝗽 & 𝗦𝘁𝗿𝗮𝘁𝗲𝗴𝘆 • Fractional CTO Services • Product Strategy and Technical Roadmapping • Team Leadership and Engineering Management ## ✅ 𝗥𝗘𝗖𝗘𝗡𝗧 𝗦𝗢𝗟𝗨𝗧𝗜𝗢𝗡𝗦 𝗗𝗘𝗟𝗜𝗩𝗘𝗥𝗘𝗗 🚀 • AI sales automation platforms with CRM integrations and analytics dashboards 📈 • GPT-powered marketing systems with automated lead generation and content workflows 💰 • Financial platforms with predictive analytics and AI-assisted operations 🎓 • AI-powered education platforms with personalized learning experiences 🚚 • Logistics and marketplace platforms integrating multiple third-party APIs 🏥 • Healthcare, legal-tech, and enterprise automation solutions 🔍 • Intelligent knowledge bases powered by vector search and large language models ## 🛠️ 𝗧𝗘𝗖𝗛 𝗦𝗧𝗔𝗖𝗞 🌐 Frontend: React, Next.js, Angular, TypeScript, Tailwind CSS 📱 Mobile: React Native, Expo ⚙️ Backend: Node.js, NestJS, FastAPI, Python 🗄️ Databases: PostgreSQL, MongoDB, Firebase ☁️ Cloud & DevOps: AWS, Docker, CI/CD 🤖 AI & Automation: OpenAI, Claude, Gemini, LangChain, Pinecone, ChromaDB, n8n, Make 🔗 Integrations: GraphQL, REST APIs, Stripe, Firebase, Third-Party Services ## ⭐ 𝗪𝗛𝗬 𝗖𝗟𝗜𝗘𝗡𝗧𝗦 𝗪𝗢𝗥𝗞 𝗪𝗜𝗧𝗛 𝗠𝗘 ✅ Fractional CTO-level strategic thinking ✅ AI, Web, Mobile, and Automation expertise under one roof ✅ Rapid MVP development and faster time-to-market ✅ Scalable architecture built for long-term growth ✅ Strong communication and reliable delivery 💡 I don't just write code—I help businesses build products that learn, automate, and scale. 📩 If you're looking for a technical partner who can combine AI, product strategy, web development, mobile apps, and automation under one roof, feel free to send an invitation through Upwork to discuss your project.
Abhinav G.
$20/hr
100% Job Success
$100K+ earned
Available now
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🚀 Top Rated Full Stack Developer | $100K+ Earned | 4900+ Hours | 10+ Years Experience Need a fast, scalable website or SaaS platform that actually helps grow your business? I help startups, agencies, and growing businesses build high-performing websites, scalable SaaS applications, and conversion-focused digital products using WordPress, Shopify, Laravel, Node.js, React, Angular, and AWS. With 10+ years of experience, I focus on delivering solutions that improve performance, user experience, conversions, and long-term scalability — not just writing code. ━━━━━━━━━━━━━━━━━━ 💻 What I Can Help You With ━━━━━━━━━━━━━━━━━━ 🔹 Full Stack & SaaS Development ✔ Scalable SaaS platforms & multi-tenant systems ✔ Custom web applications ✔ Laravel & Node.js Python & Django backend systems ✔ React.js, Next.js & Angular frontends ✔ REST APIs & third-party integrations ✔ Admin dashboards & business automation tools ✔ Healthcare SaaS & custom workflow systems 🔹 WordPress & Shopify Development ✔ Custom WordPress development ✔ Shopify store development & optimization ✔ WooCommerce customization ✔ Landing pages focused on conversions ✔ Plugin & app integrations ✔ Theme customization & speed optimization 🔹 Performance, SEO & Optimization ✔ Core Web Vitals optimization ✔ Website speed improvements ✔ Technical SEO optimization ✔ Performance audits & fixes ✔ Mobile optimization & UX improvements 🔹 Backend, Cloud & Infrastructure ✔ AWS deployment & cloud infrastructure ✔ Docker setup & deployment workflows ✔ Database architecture (MySQL, MongoDB) ✔ Payment gateway integrations (Stripe, PayPal, Razorpay) ✔ API architecture & secure backend systems ✔ Server optimization & scaling solutions 🔹 AI & Automation Solutions ✔ OpenAI & AI integrations ✔ AI-powered chatbots & assistants ✔ Smart automation workflows ✔ AI search & recommendation systems ✔ Custom AI tools for SaaS platforms ━━━━━━━━━━━━━━━━━━ 📈 Results & Impact ━━━━━━━━━━━━━━━━━━ ✔ Reduced website load times by 40%+ improving user engagement and conversions ✔ Built SaaS applications handling thousands of users ✔ Improved SEO rankings, performance scores, and revenue growth ✔ Delivered scalable systems for startups and enterprise-level businesses ━━━━━━━━━━━━━━━━━━ 💡 Why Clients Work With Me ━━━━━━━━━━━━━━━━━━ ✔ Clean, scalable, maintainable code ✔ Strong communication & reliable delivery ✔ Long-term technical thinking ✔ Fast problem-solving & performance-focused development ✔ Experience working with startups, agencies, and remote teams I can help whether you need: • A high-converting website • A scalable SaaS platform • API integrations & backend systems • Performance optimization • AI-powered features & automation • Ongoing full stack development support If you're looking for a developer who understands both technology and business growth, let’s connect and discuss your project.
Abhinav G. has worked .
AppsTechy Pvt. Ltd. - Design, Develop and Deliver
Associated with
AppsTechy Pvt. Ltd. - Design, Develop and Deliver
$200K+
earned
Luke S.
$65/hr
100% Job Success
$60K+ earned
Available now
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Funded startups hire me to take a mobile app from plan to a revenue-generating launch on the App Store and Google Play. The last app I led as mobile developer now does $10.8M ARR with 80,000+ paying subscribers and a 5.0 rating on both stores. In 7+ years on iOS and Android, apps I've built have generated $15M+ in revenue for my clients, serve 110,000+ paying users, and hold 5.0 ratings across 10,000+ App Store and Google Play reviews. You might be shipping your MVP, rebuilding a V2 your first version outgrew, or holding an AI-built prototype that's stuck before launch. Anyway, I take it the rest of the way: architecture, build, store approval, and the payment, compliance, and edge-case work that decides whether an app survives real users. 𝗣𝗿𝗼𝗼𝗳 (𝗮𝗹𝗹 𝘃𝗲𝗿𝗶𝗳𝗶𝗮𝗯𝗹𝗲 𝗼𝗻𝗹𝗶𝗻𝗲) - PawSquad: pet care subscription app. Lead mobile developer. 80,000+ paying users, 3,300+ reviews, 5.0 on both App Store and Google Play. $10.8M ARR. - Jasomi: fintech app, built end to end. 10,000+ active users. - ConnectingKnox: local business discovery app. 193 paying businesses onboarded in month one. 𝗛𝗼𝘄 𝗜 𝘄𝗼𝗿𝗸 1. Blueprint. Every feature, cost, risk, and timeline on paper before any code. You know exactly what you're paying for. 2. Weekly builds. You see and test a working app every week. No black box, no "it's almost done." 3. Launch. I handle App Store review, Google Play, servers, and monitoring, so the tech side runs without you. Along the way I catch the things first builds usually miss: bad UX, subscription edge cases (failed renewals, refunds, family sharing), and compliance gaps, before they become expensive. 𝗦𝘁𝗮𝗰𝗸 * React Native, Expo, and Flutter for one codebase on both platforms; * Swift and Kotlin when native is the right call. * Node.js, Supabase, and Firebase backends. * In-app purchases and subscriptions with RevenueCat and Stripe. * Push notifications, live chat, maps and geofencing, and AI features with the Claude and OpenAI APIs. 𝗠𝗲𝘀𝘀𝗮𝗴𝗲 𝗺𝗲 𝘄𝗶𝘁𝗵 where you are now: idea, designs, AI prototype, or a live app. You'll get an honest answer on whether I'm the right fit and what to build first.
Luke S. has worked .
Gregory P.
$35/hr
100% Job Success
$100K+ earned
Available now
Offers consultations
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Full Stack Developer SaaS focused on turning complex product ideas into stable, scalable platforms Recent Client Results: ✔️ launch SaaS products in 6-10 weeks ✔️ improve API performance by 30-45% ✔️ reduce manual operations by 40-60% ✔️ build platforms ready to support 10k+ users. As a Full Stack Developer React Node and SaaS Developer I help startups and established businesses. I bring 16+ years in software development, 225+ delivered products and 9+ years of hands-on Node.js experience. As a Certified Full Stack Developer React Node and Web Full Stack React Developer, I focus on business outcomes first: launching SaaS MVPs 30–40% faster, improving release stability, building scalable architecture, and reducing costly rework as products grow. My experience as a Full Stack React JS specialist allows me to deliver production-ready solutions with React.js, Node.js, Next.js, Nest.js, and modern JavaScript Developer workflows, supporting platforms with 10k+ users, 99.9% uptime targets, and integrations across APIs, payments, CRMs, and AI tools. As a Backend Developer Nest.js with strong TypeScript Backend Development skills, I design maintainable server-side application architecture, secure APIs, and clean business logic for SaaS, internal tools, marketplaces, and custom platforms. As a Node js Developer, Nodejs Developer, and Nodejs Backend Developer, I use Node.js to simplify complex workflows, improve backend stability by 30–45%, and support products built on both SQL and NoSQL databases. My Typescript Nodejs background helps teams move 25–35% faster with modular services, readable code, and easier long-term maintenance. I also build advanced integrations with Stripe, third-party services, and node.js graphql solutions for scalable product ecosystems, including platforms with 10k+ users, 99.9% uptime targets, and 20+ API/payment/CRM integrations. I’m a Full Stack Developer React Node with deep experience in scalable web application development across SaaS platforms, CRM systems, dashboards, admin panels, internal tools, and custom business products. My React js Node js work is focused on shipping fast, usable, and maintainable solutions that support real business goals. As a React Developer and Full Stack Developer React Node, I build responsive, scalable interfaces using React, JavaScript, Node.js, and Next.js. My work as a React JS Developer and React JS / Next.js / NestJS Developer focuses on creating fast, user-friendly products that improve usability, support growth, and reduce friction across the customer journey. I also work as a React Native Developer ( Full Stack Developer SaaS ) when a product needs mobile-first extensions or companion app experiences aligned with the main platform. As a Full stack AI SaaS developer, I help businesses with scalable SaaS Projects, Edtech Products with dashboards and payment flows, advanced e-commerce solution beyond CMS limits, Corporate Websites with strong backend logic, marketplace platforms with secure transactions, Authentication and Security with JWT-based access control, API Development and Integration, GraphDB, REST API, node.js graphql, CRM Development, Payment Gateways Stripe Paypal Liqpay, Database Management & Optimization and ongoing Deployment & Maintenance. I also bring practical experience with PHP, Laravel, Python, Vue.js, Angular, React, Node.js, full stack developer supabase react, full stack react native spring boot, JavaScript, MySQL, WordPress, Tailwind CSS, Bootstrap, HTML, HTML5, CSS and CSS 3, TypeScript, Redux, jQuery, Responsive Design, Web Design, PHP, MongoDB, Next.js python full stack developer, full stack developer ai, full stack developer react, full stack developer shopify My work covers full stack node.js react for modern Web Application products, including custom API development and API Integration, while Git supports a clean and reliable delivery workflow. I also bring strong Web Design awareness, helping create interfaces that are not only functional, but also responsive, polished and user-friendly. 👉If you need a Full Stack Web Developer who can launch faster, improve performance, stabilize architecture, and build for long-term growth - let’s discuss your product.
Gregory P. has worked .
Malevich Studio
Associated with
Malevich Studio
$300K+
earned
Oleksandr K.
$50/hr
99% Job Success
$1M+ earned
Available now
Offers consultations
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As the Founder and Owner of a successful Zoho solutions business, I bring 10+ years of hands-on experience with Zoho and 20+ years in app, web, and database development across dozens of industries. I understand the challenges founders face—manual processes, inefficient workflows, and lack of system integration—and I design solutions that save time, increase productivity, and drive growth. I specialize in implementing, customizing, and expanding Zoho applications to meet the unique needs of your business. From custom Zoho CRM development to complex integrations via APIs, Zapier, or Make, I create systems that align perfectly with how you work. My goal is to automate your sales, marketing, and business processes while standardizing workflows for maximum efficiency. Zoho Expertise: ✅ Zoho One | ZeptoMail | Zoho CRM | Zoho Flow | Zoho Desk | Zoho Analytics ✅ Zoho Books | Zoho Inventory | Zoho Creator | Zoho Recruit & Zoho People ✅ Zoho Subscriptions | Orchestly | Zoho Catalyst | Custom API Integrations What I Deliver: Fully customized Zoho workflows that match your business processes Automation of repetitive tasks to free up your team’s time Custom modules, fields, views, and filters to make Zoho work the way you do Seamless integrations across Zoho apps and external systems As a founder myself, I know what it takes to scale a business efficiently. Let’s work together to unlock the full potential of Zoho for your business, automate your operations, and drive measurable results.
Oleksandr K. has worked .
CRMOZ — Zoho Implementation & Automation Agency
Associated with
CRMOZ — Zoho Implementation & Automation Agency
$2M+
earned
Vishnu A.
$18/hr
100% Job Success
$100K+ earned
Available now
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With over 10 years of diverse experience in software development, I have done it all — from development to team leadership. I am proficient in in building high-quality mobile applications and have strong expertise in Flutter, Android, and iOS app development, along with frontend and backend systems. My expertise spans multiple industries, and I’ve had the opportunity to work with remarkable companies from around the world. I have experience with a wide range of technologies and tools, which I’ve used to build some truly amazing applications. My Services: - MVP | Startup Launch | Product Growth Consulting - Flutter App Development - Android & iOS App Development - Cross-Platform Mobile App Development - Tech Consulting & Product Strategy - Backend Development & Firebase Integration My Expertise: • Flutter App Development • Android & iOS Development • Cross-platform mobile applications • Firebase integration • REST API integration & backend collaboration • App performance optimization • Bug fixing & legacy app improvements • Play Store & App Store deployment • Ongoing app maintenance & feature development • UI/UX implementation & responsive design Who I work with: Startups – take your idea through the startup lifecycle within a reasonable budget and timeline. Small and Medium Businesses – acquire software excellence to boost your current product. Working with me, you will get: - Transparent process with various tracking tools and regular meetings. - Prompt responses and concise explanations. - Expert consulting and tailored advice based on your specific needs. - Smooth integration with existing workflows and effective collaboration with your team. - Flexibility to work with clients across different time zones, from San Francisco to London. - Thorough documentation and dedicated support throughout the transition period. Have questions or need guidance? Feel free to invite me for a discussion!
Vishnu A. has worked .
$20/hr
100% Job Success
$20K+ earned
Available now
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Are you looking to build a scalable AI-powered platform with secure Web3 integration? I am a 𝐒𝐞𝐧𝐢𝐨𝐫 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐀𝐈 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫 specializing in the 𝐌𝐄𝐑𝐍 𝐬𝐭𝐚𝐜𝐤, 𝐍𝐞𝐱𝐭.𝐣𝐬, and 𝐢𝐧𝐭𝐞𝐥𝐥𝐢𝐠𝐞𝐧𝐭 𝐚𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 to help startups launch production-ready applications. In 2026, a standard web app isn't enough. You need 𝐀𝐈 𝐀𝐠𝐞𝐧𝐭𝐬 that automate workflows and 𝐖𝐞𝐛𝟑 𝐩𝐫𝐨𝐭𝐨𝐜𝐨𝐥𝐬 that ensure transparency and security. With 𝟕+ 𝐲𝐞𝐚𝐫𝐬 𝐨𝐟 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 on Upwork with a 𝟏𝟎𝟎% 𝐉𝐨𝐛 𝐒𝐮𝐜𝐜𝐞𝐬𝐬 𝐒𝐜𝐨𝐫𝐞, I bridge the gap between complex backend logic and seamless user experiences. My Core Technical Expertise: 1) 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: Expert-level Next.js, React.js, Node.js, and TypeScript. 2) 𝐀𝐈 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧: Building custom AI Agents, LLM implementation (OpenAI, Gemini, LangChain), and Vector Databases (Pinecone/Milvus) for RAG-based applications. 3) 𝐖𝐞𝐛𝟑 & 𝐁𝐥𝐨𝐜𝐤𝐜𝐡𝐚𝐢𝐧: High-performance Solana (Rust/Anchor) and Ethereum (Solidity) smart contracts, DeFi protocols, and DApp architecture. 4) 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 & 𝐃𝐞𝐯𝐎𝐩𝐬: PostgreSQL, MongoDB, AWS, and Vercel for high-availability deployments. Why Clients Choose Me: 1) 𝐍𝐢𝐜𝐡𝐞 𝐒𝐩𝐞𝐜𝐢𝐚𝐥𝐢𝐬𝐭: I don’t just "write code." I specialize in Fintech, SaaS, and RWA (Real World Asset) Tokenization. 2) 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐅𝐢𝐫𝐬𝐭: My applications are optimized for speed, gas efficiency (Web3), and low-latency AI responses. 3) 𝐏𝐫𝐨𝐯𝐞𝐧 𝐑𝐞𝐥𝐢𝐚𝐛𝐢𝐥𝐢𝐭𝐲: I bring a level of discipline, clear communication, and architectural integrity that ensures your project is delivered on time and within budget. Stop hiring multiple developers for AI, Web3, and Frontend. Let’s build your entire ecosystem under one roof. 𝐂𝐥𝐢𝐜𝐤 𝐭𝐡𝐞 "𝐌𝐞𝐬𝐬𝐚𝐠𝐞" 𝐨𝐫 "𝐈𝐧𝐯𝐢𝐭𝐞" 𝐛𝐮𝐭𝐭𝐨𝐧 𝐭𝐨 𝐝𝐢𝐬𝐜𝐮𝐬𝐬 𝐲𝐨𝐮𝐫 𝐩𝐫𝐨𝐣𝐞𝐜𝐭 𝐫𝐞𝐪𝐮𝐢𝐫𝐞𝐦𝐞𝐧𝐭𝐬 𝐭𝐨𝐝𝐚𝐲.
Vizz Web Solutions Private Limited
Associated with
Vizz Web Solutions Private Limited
$600K+
earned
Dmitry B.
$50/hr
100% Job Success
$60K+ earned
Available now
Offers consultations
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Hi there, I'm the CEO of a company specializing in web and mobile development, UI/UX design, ERP and CRM systems, and Property Management Systems software development. Our company has been helping businesses of all sizes transform their digital presence and streamline their operations for over a decade. We are a team of highly skilled developers, designers, and project managers who are passionate about delivering exceptional software solutions to our clients. Our goal is to create software that not only meets the needs of our clients but exceeds their expectations in terms of usability, functionality, and design. We take a user-centric approach to our work, which means that we prioritize the needs of the end users when designing and developing software. Our team of UI/UX designers works closely with our clients to understand their brand and user requirements and then create designs that are visually stunning and easy to navigate. Our ERP and CRM systems expertise has helped our clients streamline their operations and manage their customer relationships more effectively. In addition, we have developed Property Management software that has helped real estate businesses manage their properties more efficiently. Our software is designed to be easy to use and provides real-time information about property occupancy, maintenance requests, and financial reporting. We are dedicated to providing our clients with exceptional software solutions to help them achieve their business goals. We take pride in our work and are committed to delivering projects on time and within budget. What we do: ✔️ ERP ✔️ CRM ✔️ SaaS ✔️ Property Management System ✔️ Construction Management platforms ✔️ Logistics solutions, Fleet and Freight Management Software ✔️ B2B / B2C Marketplaces ✔️ HealthTech solutions Let's get things done together!
Requestum
Associated with
Requestum
$9M+
earned
Dmitriy M.
$50/hr
100% Job Success
$200K+ earned
Available now
Offers consultations
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Senior Full Stack Developer. Top Rated Plus, 100% Job Success, $276K+ earned across 54 jobs since 2014 on Upwork. CEO/CTO at 2muchcoffee agency. Recent work: Faktastisch (1700+ hrs, $86K, 5-star) full-stack React/Node SaaS rebuild, Proctoring MVP (active), educational platform ($29K React/Next.js), CTO-as-advisor engagements. Past production builds: MediBrain, MyAnswer, VoiceDesk, Cosmo marketplace, Stepler (N1 Swedish Appstore fitness). What I deliver: - Senior full-stack architecture: React + Next.js frontend, Node.js + NestJS backend, PostgreSQL/MongoDB - Code review and architecture consulting for engineering teams - Production-ready SaaS from MVP to scale - TypeScript end-to-end, GraphQL APIs, Supabase, AWS infrastructure - AI integration when projects call for it: OpenAI, RAG, LangChain Tech stack: React, Next.js, Node.js, NestJS, TypeScript, PostgreSQL, MongoDB, GraphQL, Supabase. Strong Angular and Python background. Lead engineer for product teams. Senior Full Stack Developer, Full Stack Developer, React Developer, Next.js Developer, Node.js Developer, NestJS Developer, TypeScript Developer, Architecture Consultant, Code Review Specialist, AI Integration Developer.
2MUCHCOFFEE LLC
Associated with
2MUCHCOFFEE LLC
$4M+
earned
Luka A.
$70/hr
100% Job Success
$40K+ earned
Available now
Offers consultations
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➤ $1.8M+/year projected savings - AI document search (RAG) for a $300M/year NYC infrastructure contractor: teams search 10,000+ pages per project, daily search time cut from 60 minutes to 10 (Azure, OpenAI). ➤ 2,400+ AI recommendations - 92% mobile adoption, 8.1 chats/user (Next.js, Django, Flutter). ➤ 75% infrastructure cost cut - migrated a $300M/year brand to serverless microservices (AWS, Node.js/TypeScript). ➤ 300k+ monthly users - production ordering platform with payments, subscriptions, and admin dashboard. I'm Luka, a senior full-stack and AI engineer. I own the full stack and the full product process end to end: scoping, UI/UX design (Figma), frontend, backend, web application and mobile application development, AI integration, deployment, and post-launch improvements. From scratch or inside your existing app, from prototype to production. WHAT I BUILD • AI agents and agentic workflows - multi-agent systems, tool use, MCP servers, AI automation and workflow automation that replace manual work • AI chatbot development and AI assistants - customer support chatbot, internal knowledge base assistant, WhatsApp and Telegram bots • RAG and AI document search - semantic search, vector search, embeddings, data extraction, hallucination control and evals • AI voice agents and voice assistants - real-time voice, Whisper, ElevenLabs, Deepgram, Twilio • AI integrations into existing products - OpenAI, Anthropic Claude, Gemini; AI features added to your current software • AI-powered SaaS platform and MVP development - user authentication, payments (Stripe), subscription billing, admin panel, dashboards • Web app development - React, Next.js, TypeScript, Tailwind CSS; fast, scalable, real-time • Mobile app development - React Native (Expo) and Flutter, iOS + Android, App Store launch included • Internal tools, CRM and dashboard builds, customer portals, marketplace and booking platforms • Backend and API development - Node.js, Python (FastAPI, Django), REST API, webhooks, API integration with third-party services SELECTED PROJECTS • Spinio - AI recommendation chatbot for the UK market with 95%+ recommendation accuracy; helps users find the right option through natural language search • Leelou AI - AI voice coaching chatbot for TNM Coaching: instant leadership coaching built on the company's framework, helped them close a 200+ employee enterprise client • SEO AI Platform - AI agents for a large SEO company: content generation, data analysis, and text/image compliance checks; active long-term build, new features shipped every sprint (under NDA) • Ergo Global - private AI customer support system: website chat, internal app chat, and Outlook inbox automation, faster responses while keeping sensitive customer messages private • Juggle Ease - multilingual AI voice assistant inside a family mobile app; users talk to the app and complete tasks hands-free, with responses under 0.5 seconds • Rooost - AI accommodation concierge that gives business travelers local recommendations based on where they are staying STACK Frontend: React, Next.js, TypeScript, JavaScript, Tailwind CSS, Figma-to-code Backend: Node.js, Python, FastAPI, Django, REST APIs, websockets, webhooks Mobile: React Native, Expo, Flutter AI/LLM: OpenAI (GPT, ChatGPT), Anthropic Claude, Gemini, LangChain, prompt engineering, MCP, multi-agent orchestration, LLM evals Data: PostgreSQL, Supabase (Postgres), MongoDB, MySQL, Redis, vector databases (Pinecone, pgvector, Qdrant) Cloud: AWS, Azure, GCP, Vercel, Docker, CI/CD Integrations: Stripe, Twilio, Firebase, WhatsApp, Telegram, HubSpot, Salesforce AI-assisted development: Claude Code, Cursor — with senior-engineer review on every line HOW I WORK My approach is simple, but uncommon. I start each project by setting KPI goals with you and scoping the requirements. Then I dive into development. 1–2 weeks to a proof of concept, 6–8 weeks to a production MVP. Once development is completed, I don't disappear: I stick around for 4 more weeks COMPLETELY FREE to optimize the project until we hit the KPI goals we set, and fix any bugs. I take on 1–2 new builds per month to preserve quality. Message me with your goal and if we're a good fit we can get on a call!