Senior AI & Full-Stack Engineer | React, Next.js, Python, LLMs, RAG, AI Agents Need an engineer who can build your entire AI product not just the AI model or the backend? I build production-ready AI applications from idea to deployment, combining modern full-stack engineering with LLMs, RAG pipelines, AI agents, and scalable cloud infrastructure. Whether you're building an AI SaaS, internal business platform, customer support agent, document intelligence system, or workflow automation tool, I deliver software that's reliable, maintainable, and ready for production. Unlike teams that split frontend, backend, and AI across multiple developers, I own the complete product—from architecture and UI to APIs, AI integration, deployment, and ongoing optimisation. I also work AI-augmented using Cursor, Claude Code, and GPT Codex, enabling faster development, rapid iterations, and high-quality code without sacrificing architecture, scalability, or maintainability. AI & LLM Applications * LLM-powered SaaS applications * Retrieval-Augmented Generation (RAG) * GraphRAG & Agentic RAG * Semantic search & document intelligence * AI copilots & enterprise knowledge systems * GPT, Claude, Gemini, Llama, DeepSeek * Pinecone, pgvector, Weaviate, Chroma, FAISS AI Agents & Automation * LangGraph, CrewAI, MCP * Multi-agent systems * Tool calling & workflow orchestration * AI workflow automation * Browser automation & intelligent agents Voice AI * Real-time AI voice assistants * Whisper * ElevenLabs * Deepgram * Twilio Voice Full-Stack Development * React, Next.js 15, TypeScript * React Native & Expo * Node.js, FastAPI, Django * PostgreSQL, MongoDB, Redis, Supabase * REST APIs & third-party integrations Cloud & DevOps * Docker * Kubernetes * AWS, GCP, Azure * GitHub Actions * CI/CD pipelines * Production deployments Healthcare & Enterprise Integrations * HL7 & FHIR * Mirth Connect * EHR/EMR integrations * Secure healthcare APIs * Enterprise workflow automation Why Clients Hire Me Build complete AI products—not just individual components Strong full-stack engineering combined with production AI expertise Scalable architecture designed for long-term growth Fast delivery using AI-assisted development while maintaining production-quality code Clear communication, practical technical decisions, and end-to-end ownership If you're looking for someone who can design the architecture, build the product, integrate AI, and deploy it to production, let's discuss your project. I can usually review your requirements, suggest the right technical approach, and define a practical implementation plan in our first conversation.

15 years of experience with Top Rated Upwork profile for past 10+ years. I help brands to generate 10x more leads and drive 100%+ ROI in B2B, B2C, and e-commerce realms through an end-to-end digital strategy that unites SEO, Google Ads, high-converting content, and precise analysis (GA4 & GTM). ====== I'm committed to getting the job done. In my work for your business, I assure: 🚀 500% Organic Traffic Growth 📍300% Lift in Local Search Rankings 💰 25% Sales Revenue Growth ✅ 90% Decrease in Bad Reviews ============= My Professional Strengths: 📍Local SEO: Optimize your local presence & attract local customers. ✍️ Content Creation: Share your story & establish brand authority. 🔗 Link Building: Increase your site's authority & search rankings. ⭐ Reputation Management: Establish trust & manage your online reputation effectively. 📍Data-driven CRO specialist with 200% boost in conversion rates through strategic optimization and A/B testing.

Your website is more than just a digital address; it is the engine of your business. When built correctly, it works for you 24/7, turning visitors into loyal customers while you sleep. 𝗜 𝗱𝗼𝗻'𝘁 𝗷𝘂𝘀𝘁 𝘄𝗿𝗶𝘁𝗲 𝗰𝗼𝗱𝗲; 𝗜 𝗯𝘂𝗶𝗹𝗱 𝗱𝗶𝗴𝗶𝘁𝗮𝗹 𝗮𝘀𝘀𝗲𝘁𝘀. If you are looking for a partner who prioritizes 𝗽𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲, 𝘀𝗲𝗰𝘂𝗿𝗶𝘁𝘆 𝗮𝗻𝗱 𝘂𝘀𝗲𝗿 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 as much as you do, you’ve found the right profile. I specialize in bridging the gap between sophisticated backend engineering and a front-end experience that feels effortless for your users. 𝗪𝗵𝗮𝘁 𝗜 𝗕𝗿𝗶𝗻𝗴 𝘁𝗼 𝗬𝗼𝘂𝗿 𝗣𝗿𝗼𝗷𝗲𝗰𝘁 As a Full Stack Developer, I handle the entire lifecycle of your project so you don't have to manage multiple freelancers. ⚡ 𝗧𝗵𝗲 𝟭-𝗦𝗲𝗰𝗼𝗻𝗱 𝗦𝘁𝗮𝗻𝗱𝗮𝗿𝗱: In a world of short attention spans, speed is your greatest competitive advantage. I optimize every asset to ensure your site feels instant and effortless. 🛡️ 𝗜𝗻𝘃𝗶𝘀𝗶𝗯𝗹𝗲 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆: I build robust, future-proof architectures so you can scale with total confidence, knowing your user data is locked tight. ⚙️ 𝗜𝗻𝘁𝘂𝗶𝘁𝗶𝘃𝗲 𝗘𝗹𝗲𝗴𝗮𝗻𝗰𝗲: 𝗔 𝗴𝗿𝗲𝗮𝘁 𝘄𝗲𝗯𝘀𝗶𝘁𝗲 𝘀𝗵𝗼𝘂𝗹𝗱𝗻'𝘁 𝗷𝘂𝘀𝘁 𝗹𝗼𝗼𝗸 "𝗮𝘁𝘁𝗿𝗮𝗰𝘁𝗶𝘃𝗲"; it should feel natural to use. I create interfaces that guide your visitors exactly where they need to go. 𝗜 𝗵𝗮𝘃𝗲 𝟭𝟰+ 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 𝗶𝗻 𝗯𝗲𝗹𝗼𝘄 𝘁𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀: Frontend: React.js, Next.js, HTML5, CSS3, JavaScript, TypeScript, Tailwind CSS. Backend: PHP, Laravel, CodeIgniter, Node.js, Express.js, GraphQL, RESTful APIs. Database: PostgreSQL, MongoDB, Firebase, MySQL. CMS Expertise: WordPress (Custom/Headless), Strapi, Shopify. UI/UX & Payments: Responsive Design, Stripe/PayPal, Figma-to-Code Conversion. 𝗧𝗵𝗲 "𝗦𝘁𝗿𝗲𝘀𝘀-𝗙𝗿𝗲𝗲" 𝗣𝗮𝗿𝘁𝗻𝗲𝗿𝘀𝗵𝗶𝗽 Hiring on Upwork should bring relief, not more work. My process is built on transparency: 𝟭. 𝗗𝗶𝗿𝗲𝗰𝘁 𝗖𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗶𝗼𝗻: You will never have to wonder about the status of your project. I provide regular, clear updates. 𝟮. 𝗖𝗹𝗲𝗮𝗻, 𝗠𝗮𝗶𝗻𝘁𝗮𝗶𝗻𝗮𝗯𝗹𝗲 𝗖𝗼𝗱𝗲:I write documented code that any professional team can pick up and scale in the future. 𝟯. 𝗟𝗼𝗻𝗴-𝘁𝗲𝗿𝗺 𝗧𝗵𝗶𝗻𝗸𝗶𝗻𝗴: I don’t just "hand over the keys." I provide post-launch support to ensure your transition is flawless. "A great website isn't a cost; it’s an investment that should pay for itself." 𝗟𝗲𝘁’𝘀 𝗧𝘂𝗿𝗻 𝗬𝗼𝘂𝗿 𝗜𝗱𝗲𝗮 𝗜𝗻𝘁𝗼 𝗥𝗲𝗮𝗹𝗶𝘁𝘆 Click the "𝗠𝗲𝘀𝘀𝗮𝗴𝗲" or "𝗜𝗻𝘃𝗶𝘁𝗲" button for a brief, no-pressure chat. I’ll listen to your goals and provide a technical roadmap tailored specifically to your business needs. 𝗟𝗲𝘁’𝘀 𝗯𝘂𝗶𝗹𝗱 𝗮 𝗱𝗶𝗴𝗶𝘁𝗮𝗹 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 𝘆𝗼𝘂𝗿 𝗯𝗿𝗮𝗻𝗱 𝗱𝗲𝘀𝗲𝗿𝘃𝗲𝘀. Full Stack Developer | Laravel Developer | PHP Developer | React Developer | Shopify Developer | Web Application Development | SaaS Development | API Development | REST API | GraphQL | AI Integration | ChatGPT Integration | Automation Development | E-commerce Development | Shopify Expert | WordPress Developer | Headless CMS | Next.js Developer | Node.js Developer | Payment Gateway Integration | Stripe Integration | PayPal Integration | Custom Web Development | Scalable Web Apps | High Performance Websites | Secure Web Development | MVP Development | Startup Development | CRM Development | Admin Panel Development | Dashboard Development | Bug Fixing | Website Optimization

You have a product idea, a business problem, or a system that needs to be built right. We've done this 100+ times. AB Ark is a 12-year-old software agency that builds AI-powered web apps, mobile products, SaaS platforms, and enterprise ERP systems — end to end, from discovery to deployment. We don't just write code. We think like product owners. Our team includes BAs, architects, UI/UX designers, and senior engineers who have shipped products across healthcare, fintech, real estate, e-learning, logistics, and more. ━━ What we build ━━ ✦ SaaS platforms & web applications (React, Node, Laravel, Python) ✦ Mobile apps — iOS, Android, Flutter (cross-platform) ✦ AI & automation — ChatGPT integrations, intelligent workflows, ML pipelines ✦ ERP & custom enterprise software — operations, HR, supply chain, finance modules ✦ MVP development — structured 2–4 week sprints with working prototypes ━━ Why clients choose us ━━ ✦ Full BA process — wireframes, user flows, and architecture before a line of code ✦ Fixed-scope or milestone-based contracts — no bill shock ✦ Direct access to senior engineers, not outsourced to juniors ✦ Post-launch support & maintenance included ━━ Tech stack ━━ React.js · Next.js · Node.js · Python · React Native · Swift · Kotlin · AWS · Docker · PostgreSQL · MongoDB · OpenAI API · LangChain If you're evaluating agencies, here's what I suggest: share your project brief and I'll send back a scoped proposal with wireflows and architecture ASAP — at no cost. Let's build something great together.

I specialize in building high-performance AI automations and enterprise applications for businesses looking to scale. As the CTO of Mangocoders, I transform complex requirements into actionable solutions, particularly excelling in WordPress development, Python-based applications, and React interfaces. I've led significant projects such as a WordPress-based system overhaul and developed APIs using Python and React to improve user engagement and streamline operations. My work with REST APIs is extensive, ensuring effective integration across platforms. I focus on clear communication and aligning technical strategies with business goals. By using technologies like Node.js and PostgreSQL, I ensure the delivery of scalable and efficient solutions. Let's discuss how I can help build your next secure and scalable project.

Is your website generating leads and sales, or just sitting online? I work with businesses that want their website to be an actual revenue channel, not just a digital brochure After 190+ completed projects and 1,800+ hours of work, I've noticed one pattern: most websites underperform for the same reason, they don't represent the business clearly and they fail to convert visitors into customers. That's exactly what I fix. Here's what I deliver: • WooCommerce & Shopify stores, fast, structured, and optimized for sales • Business & service websites that encourage visitors to take action • High-converting landing pages built around clear CTAs • Website redesigns & migrations, with zero downtime • Page speed, on-page SEO & UX improvements that move the needle Recent results: • Improved a client's GTmetrix score from 38 → 91, bounce rate dropped by 34% • Restructured a service website's UX, lead form conversions increased by 2.1x I work across WordPress, Shopify, WooCommerce, Elementor, Webflow, Wix, and Squarespace platforms. If you want your website to not just look good but actually perform, let’s discuss your project today.

I'm a UI UX Designer with 6+ years of practice in UX & UI Design, helping SaaS, EdTech, and AI-driven products ship intuitive, conversion-focused interfaces. ⭐⭐⭐⭐⭐ "Andrii is a fantastic designer with strong UX intuition and excellent Figma skills." (recent client review) 🎯 What I bring to your product as a UI UX Designer UIUX Designer: ✔️ As a UI UX Designer, I lead end-to-end product design: discovery, user research, wireframing, hi-fi UI in Figma, interactive prototyping, developer handoff. ✔️ As a UI/UX Designer, I specialize in SaaS web apps, AI-powered products, mobile apps (iOS & Android), and high-converting landing pages. ✔️ As a UIUX Designer, I build atomic design systems and component libraries that scale across multi-screen products. ✔️ As a UX/UI Designer, I work daily with React/Next.js engineering teams. My designs ship without rework. ✔️ As a UI & UX Designer, I deliver in Figma with developer-ready specs (responsive breakpoints, hover states, design tokens). 📊 Verified UI UX Designer work: 🔶 Notesight AI EdTech AI Notetaking: brand identity, mobile app UI, landing page (Loom walkthrough on request). 🔶 MyAnswer AI: AI Q&A platform mobile UI. 🔶 ReRick: mobile commerce experience. 🔶 SalesHub: sales team CRM dashboard. ▪ 6+ years of UI UX Design experience ▪ 50+ successful design projects shipped ▪ 100% Job Success Score on Upwork ▪ Top Rated Plus (via 2muchcoffee LLC agency) ▪ Daily Figma user (auto-layout, components, design tokens, dev handoff) ▪ Real engineering collaboration with a 2muchcoffee React/Next.js dev team 🤝 Let's Build Something Great Looking for an experienced UI/UX Designer UI UX Designer UIUX Designer UXUI Designer who ships production-quality Figma designs? Click "Invite" or "Message" to discuss your project goals. UI UX Designer, UIUX Designer, UI/UX Designer, UX/UI Designer, UI & UX Designer, Figma Designer, SaaS UI UX Designer, Mobile UI UX Designer, AI Product UI UX Designer, Landing Page UI UX Designer, EdTech UI UX Designer, Design System Designer, Web App UI UX Designer, Mobile App UI UX Designer, Conversion-Focused UI UX Designer, UI UX Designer Figma, UX Researcher, UI Designer, UX Designer

Senior Mobile App Developer Flutter | React Native with 10+ years of experience building scalable, AI-integrated, real-time mobile applications for iOS and Android. Proven expertise in taking products from concept and architecture through development, deployment, and successful App Store and Google Play releases, with a strong focus on performance, user experience, and secure backend integrations. Where I typically get involved: - Cross-platform mobile app development using Flutter, React Native, Swift, and Kotlin - Real-time features - chat systems, live updates, push notifications using WebRTC, WebSockets, and Firebase - AI-integrated mobile apps with OpenAI, third-party API connections, and backend-driven architecture - POS systems, payment gateway integration, and transaction-based Android and iOS applications - Location-based features using Google Maps, Mapbox, and GPS tracking - Flutter and React Native performance optimization, bug fixing, and app restructuring - Apps requiring iCloud Sync, SQLite, REST APIs, or Twilio integration How I work differently: I ask the questions most developers skip, about scale, user behavior, and what happens when things go wrong. Every architecture decision I make is based on where your product is going, not just where it is today. My clients don't come back to rebuild. They come back to expand. Tech Stack: Flutter | React Native | Kotlin | Swift Firebase | SQLite | iCloud Sync | WebRTC | Twilio REST APIs | WebSockets | Google APIs | Mapbox | GPS OpenAI Integration | AI Mobile Apps | FlutterFlow AI tools | Cursor AI | Claude AI | Open AI Codex Certifications: Master Advanced Flutter App Development: Coursera (EDUCBA) Meta React Native Specialization: Coursera Regards, Rakesh Senior Mobile App developer - ChicMic Studios

22x Salesforce Certified Professional with 10+ years of experience helping businesses get the most out of Salesforce. I work across Sales Cloud, Service Cloud, Experience Cloud, Marketing Cloud, Loyalty Management, and Data Cloud to design scalable solutions that support business growth. From CRM strategy and system architecture to integrations, automation, security, and performance optimization, I focus on building practical solutions that are easy to use, maintain, and scale as your business evolves. I help startups, growing businesses, and enterprise organizations streamline their sales, customer service, and operational processes through Salesforce, HubSpot, and Zoho CRM solutions. Whether you're implementing a CRM for the first time, improving an existing setup, or planning a digital transformation initiative, I can help you identify the right approach and deliver solutions that drive measurable results. Services I Offer ✔ Salesforce Consulting & Advisory ✔ Salesforce Administration & Development ✔ Sales Cloud Implementation & Optimization ✔ Service Cloud Implementation & Support ✔ Experience Cloud (Community/Portal) Solutions ✔ Marketing Cloud & Account Engagement (Pardot) ✔ Data Cloud & Customer Data Strategy ✔ CRM Process Automation & Workflow Optimization ✔ Custom Applications & Lightning Development ✔ API & Third-Party Integrations ✔ Data Migration, Cleansing & Governance ✔ Reports, Dashboards & Business Analytics ✔ HubSpot CRM Setup & Automation ✔ Zoho CRM Configuration & Customization ✔ User Training, Adoption & Ongoing Support Why Clients Work With Me • Business-first approach, not just technical implementation • Clear communication and proactive project management • Scalable solutions built for long-term success • Strong focus on user adoption and business outcomes • Experience working with startups, SMBs, and enterprise organizations • Reliable support from strategy through implementation and optimization Salesforce Certifications • Salesforce Certified Application Architect • Salesforce Certified System Architect • Salesforce Certified Platform Developer II • Salesforce Certified Platform Developer I • Salesforce Certified Platform App Builder • Salesforce Certified Administrator • Salesforce Certified Advanced Administrator • Salesforce Certified Sales Cloud Consultant • Salesforce Certified Service Cloud Consultant • Salesforce Certified Experience Cloud Consultant • Salesforce Certified Marketing Cloud Consultant • Salesforce Certified Marketing Cloud Developer • Salesforce Certified Marketing Cloud Email Specialist • Salesforce Certified Pardot Specialist • Salesforce Certified CPQ Specialist • Salesforce Certified Data Cloud Consultant • Salesforce Certified AI Associate • Salesforce Certified AI Specialist • Salesforce Certified Sharing & Visibility Architect • Salesforce Certified Data Architect • Salesforce Certified Integration Architect • Salesforce Certified Associate My goal is to help businesses simplify processes, improve customer experiences, and maximize their CRM investment. I believe successful CRM projects are built on understanding business needs first and technology second. If you're looking for a trusted Salesforce, HubSpot, or Zoho CRM consultant who can provide strategic guidance, hands-on implementation, and long-term support, I'd be happy to discuss your project.

🚀 I help SaaS startups and growing tech companies design intuitive, high-converting product interfaces that users love. With over 8+ years of hands-on UI/UX experience and certifications from IBM, Google, and IIT Delhi, I turn complex ideas into seamless user flows, clickable Figma prototypes, and scalable design systems. 🛠 SPECIALIZATION & INDUSTRIES • SaaS Products & Complex Data Dashboards • Mobile Apps (iOS & Android) & Web Applications • Design Systems & Component Libraries (Figma) • IoT, V2X/Transportation, FinTech, & EdTech Platforms 🎨 WHAT I DELIVER • User Research, Wireframing & Clickable Prototypes • High-Fidelity UI Design & Design System Creation • UX Audits, Heuristic Evaluation & Redesigns 🧰 TOOLS: Figma, Adobe XD, Photoshop, Illustrator, Miro, Jira, Notion Have a project or feature to design? Send me a message, and let’s turn your vision into a finished product!