I As an experienced Full-Stack Web and Mobile Developer with over 8 years of professional expertise, I specialize in building robust, high-performance applications that bring real value to clients. From pixel-perfect UI design to scalable back-end architecture, I ensure every project is delivered with precision and quality. Whether you're launching a new mobile app, enhancing your web platform, or fixing complex bugs and test cases, I provide end-to-end solutions with a focus on reliability, maintainability, and client satisfaction. ✅ Core Skills & Expertise: React Native, Native iOS & Android App Development Full-Stack Web Development: PHP, Laravel, CodeIgniter, Symfony, WordPress, Magento Front-End Frameworks: Angular, JavaScript, HTML5, CSS3 Back-End & APIs: Node.js, RESTful APIs Hybrid Mobile Apps: Ionic, Cordova Testing & Debugging: React Native Testing Library, Unit Testing, Debugging Execution Errors ✅ Why Work With Me? Proven ability to fix critical bugs and test case issues efficiently Strong problem-solving mindset with attention to detail Available for long-term collaborations (30+ hours/week) Committed to clear communication and on-time delivery Focused on building long-term relationships through quality work and trust Let's work together to bring your project to life and achieve your business goals with professional results.

𝙃𝙚𝙡𝙡𝙤 𝙖𝙣𝙙 𝙬𝙚𝙡𝙘𝙤𝙢𝙚 𝙩𝙤 𝙢𝙮 𝙥𝙧𝙤𝙛𝙞𝙡𝙚! I’m a 16+ years Full Stack & Mobile App Architect helping startups and enterprises build AI-powered mobile apps, SaaS platforms, and scalable digital products. With $190K+ 𝑬𝒂𝒓𝒏𝒊𝒏𝒈 𝒐𝒏 𝑼𝒑𝒘𝒐𝒓𝒌 | 50+ 𝑱𝒐𝒃𝒔 𝒔𝒖𝒄𝒄𝒆𝒔𝒔𝒇𝒖𝒍𝒍| 1300+ 𝒉𝒐𝒖𝒓𝒔 𝒘𝒐𝒓𝒌𝒆𝒅, I specialize in transforming ideas into production-ready web + mobile + AI systems. Today’s winning products are no longer just apps, they are AI-enabled user experiences, and that’s exactly where I help clients win. 𝗪𝗵𝗮𝘁 𝗜 𝗕𝘂𝗶𝗹𝗱: ✔ AI-powered Mobile Apps (iOS + Android) ✔ GPT / OpenAI integrations ✔ AI chat, voice assistants, real-time messaging ✔ SaaS dashboards + admin systems ✔ Fintech, healthtech, logistics & wellness apps ✔ MVPs that scale into enterprise platforms 𝗖𝗼𝗿𝗲 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 𝗠𝗼𝗯𝗶𝗹𝗲: Flutter, React Native, Swift, Kotlin 𝗕𝗮𝗰𝗸𝗲𝗻𝗱: Node.js, Nest.js, MERN, Laravel 𝗔𝗜: OpenAI, GPT, RAG, AI Agents, TensorFlow Lite 𝗖𝗹𝗼𝘂𝗱: AWS, Firebase, Docker, CI/CD, GCP, Azure 𝗥𝗲𝗮𝗹𝘁𝗶𝗺𝗲: Agora, Sinch, WebRTC, Socket, Zegocloud, QuickBlox 𝗣𝗮𝘆𝗺𝗲𝗻𝘁𝘀: Stripe, Apple Pay, Google Pay, HyperPay, M Paisa, PayPal, BrainTree, etc. Authorize. Net, etc. 𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗛𝗶𝗿𝗲 𝗠𝗲 ✔ AI + Mobile product strategy mindset ✔ Strong MVP to scale architecture ✔ Fintech, healthtech, logistics & wellness apps ✔ MVPs that scale into enterprise platforms ✔ Startup speed with enterprise-grade quality ✔ End-to-end ownership: UI → backend → AI → launch If you’re building the next AI-first mobile app or SaaS platform, let’s connect.

Hello, I’m Ivan - a front-end developer specializing in Angular and Ionic, with 4+ years of experience building high-quality web and cross-platform mobile applications. I primarily work with startups and small businesses, helping them design, build, and scale reliable digital products — without unnecessary complexity. I help clients turn ideas into real products, as well as improve and extend existing web and mobile applications - from building responsive web apps to developing cross-platform mobile solutions and handling deployment on the App Store and Google Play. What I can help you with: ✓ Building modern, responsive web applications with Angular ✓ Developing cross-platform mobile apps using Ionic + Capacitor ✓ Converting and optimizing existing platforms for mobile ✓ Integrating Firebase (authentication, database, social logins) ✓ Working with native features (camera, location, push notifications, etc.) ✓ Publishing apps and managing updates on both app stores ✓ Maintaining, optimizing, and scaling existing applications I’ve worked in different environments - independently and in teams (remote, hybrid, and on-site) — and I focus on clear communication, clean code, and delivering dependable results. I’m continuously improving my skill set and currently expanding into Supabase and Shopify to better support current and new clients. 📩 References or recommendation letters are available upon request. Feel free to reach out with your ideas or current app, and I can help you with next steps.

Most AI automations look great in a demo and quietly break in production. I build the ones that actually run your business, deployed in about a week and hardened from day one. I'm an AI automation engineer who turns slow, manual business processes into reliable systems that pay for themselves fast. Using Claude Code, MCP, and modern AI tooling, I ship working automations in days, not quarters, then lock them down so they survive real traffic, security reviews, and 2 AM edge cases. What I automate (and the payback that follows): Lead-to-cash workflows: intake, qualification, CRM sync, and follow-up that recover hours every week and stop deals slipping through the cracks. Document and data pipelines: contracts, invoices, reports, and records parsed, routed, and filed automatically with full audit trails. Internal ops and back-office: onboarding, ticket triage, reporting, and approvals wired together across the tools you already use. Custom AI agents: Claude-powered assistants and MCP integrations connected to your real systems, not a sandbox. How I work: 1. Scope call: we pin down the one process costing you the most time or money. 2. Build sprint (days, not months): I ship a working automation fast, with you reviewing progress along the way. 3. Harden and hand off: secrets management, least-privilege access, encryption, and a written runbook so it keeps running after I'm gone. 4. Live in about a week: most projects deliver measurable payback within the first week or two of going live. Why clients hire me over a cheaper option: speed and security usually come as a trade-off. I deliver both. Every build ships with non-root containers, isolated environments, secrets rotation (Vault or AWS Secrets Manager), and SOC 2, HIPAA, and GDPR-aligned practices baked in, so what works in week one still passes an audit in month six. Stacks: Claude Code, MCP, OpenAI, Gemini. AWS, GCP, Azure, DigitalOcean, on-prem. Docker, Tailscale, Cloudflare Tunnel, WireGuard. Best fit for: founders and ops or engineering leaders in legal, finance, healthcare, and compliance-bound SaaS who need automation that's fast to ship and safe to trust. A quick first step: message me the one process eating the most time in your week. I'll send back a short, no-obligation plan for automating it, usually within a couple of hours during business hours.

AI-AGENTIC ENGINEER & ARCHITECT | 17 YRS SENIOR (from 2009) A CTO-like technical owner you take on demand, individual not agency, sized for small B2B and freelance teams AUDIT ME RIGHT NOW: 👉 github=bvasilenko UPWORK-VERIFIED, NOT SELF-REPORTED: 100% JOB SUCCESS | TOP RATED PLUS | $500K+ EARNED | 14,040 HOURS | 46 JOBS. 461 merged PRs in open-source TrueNAS, every commit public: 👉 github(dot)com/truenas/webui Watch it work, face-narrated by me: a multi-user CRDT graph editor, 👉 boriscoder(dot)com/building-block/1gtea0 Reviews, verbatim: "a rare find" / "requires no micro-management". Named 5.0 wins: Angular EdTech LMS 1,638 hrs + founder testimonial; SaaS analytics 637 hrs. 🚀 My flagship is an AI-first, agent-agnostic Company OS of my own authorship, live roadmap at 👉 roadmap.app.zendeploy.net. I run a fleet of sandboxed AI agents in parallel and I sign every merge: agents carry the volume, I review every change, no quality traded. WHERE I FIT AS AN AI ENGINEER (honest self-grade) 🏗️ Builder, idea to production-grade product: my core. 🛡️ Maintainer, keep a mature system safe, reliable, regression-clean: strong. 🧹 Sweeper, simplify and refactor, cut cost and cruft: solid. 💡 Prototyper, ideas and fast prototypes: deep bench, though most are meant to be thrown away. 🌱 Grower, drive a product to market fit: not my lane. I build and harden, and I partner with the people who own growth. THE WORK I LIKE: I take on work for the interest and the enjoyment of a good problem. I love R&D and building things from scratch, especially a hard AI problem, and I am equally happy in calm, steady, routine work. What matters to me is a relaxed pace and something worth doing. If that sounds like your project, interesting or plain, let us talk. 👋 A LITTLE ABOUT ME: A cool-nerd techie at heart, I build for the love of making things run. I am doing a PhD, and I tinker on my own open-source projects (quant5-lab/runner, delta5-hq/d5, npm:@booga). Off the clock I compose music and play keyboard, and I build robots for fun. If you get excited about a hard problem at 1am, we will get along.

I'm a full-stack developer with 10 years of experience building web applications that solve real business problems. Over the years I've worked with startups, agencies, and established businesses, helping turn ideas into reliable products that people actually use. My work spans both modern web development and AI engineering, helping businesses build intelligent applications powered by Large Language Models (LLMs), Retrieval-Augmented Generation (RAG), and AI agents. I enjoy owning the entire development process—from designing scalable backend systems and APIs to building responsive frontend applications and deploying production-ready solutions. 🚀 What I Can Help You Build Modern web applications with React, Next.js, Node.js, and TypeScript REST APIs, scalable backend systems, and database design AI-powered applications using Large Language Models (LLMs) Retrieval-Augmented Generation (RAG) pipelines over proprietary data AI agents and multi-step workflows for business automation LangChain-based applications and LLM orchestration Fine-tuning open-source models for domain-specific use cases AI integrations that fit naturally into existing products and business workflows I believe good software should be easy to maintain, easy to extend, and built with the end user in mind. My focus is always on writing clean, maintainable code and delivering production-ready solutions. 🛠️ Tech Stack 💻 Frontend React, Next.js, TypeScript, JavaScript, Tailwind CSS, Redux, Zustand ⚙️ Backend Node.js, Express.js 🗄️ Databases & ORMs PostgreSQL, MySQL, MongoDB, Prisma 🤖 AI Engineering LLMs, RAG Pipelines, LangChain, Agentic AI, Prompt Engineering, Model Fine-tuning, AI Workflow Orchestration 🔌 Tools & Integrations Stripe, Firebase, Google Analytics (GA4), Sentry If you're looking for a developer who can build modern web applications, integrate AI into existing products, or take an idea from concept to production, I'd be happy to discuss your project.

I am a Mobile App Developer specializing in iOS & Android development with Flutter and React Native. For 10+ years, I’ve been helping startups and businesses launch scalable, high-performing mobile applications that users love. From Flutter iOS app development to Android React Native solutions, I build cross-platform apps that combine clean UI/UX with powerful backend integrations. My Expertise in Mobile Development — Flutter App Development (iOS & Android) — React Native App Development (cross-platform) — API integration (Firebase, REST, GraphQL, Twilio, Agora, Stripe, Mapbox) — Real-time features: chat, notifications, live streaming, geolocation — Scalable backends with Node.js, Django, Laravel, AWS, and CI/CD pipelines — UI/UX design for mobile apps (Figma, animations, smooth interactions) Industry Specializations — Healthcare Apps: telehealth, patient data tracking, HIPAA-compliant systems, weight management. — FinTech Apps: mobile wallets, banking dashboards, blockchain solutions — E-Commerce & Booking: secure payments, inventory, scheduling — Social & Media: live streaming, podcasts, video platforms — IoT & Wearables: fitness apps, Bluetooth/NFC integrations Why Clients Choose Me — 10+ years of mobile & web development experience — Proven expertise in Flutter & React Native for iOS/Android apps — Strong background in backend & cloud architecture — Focus on performance, scalability, and intuitive design If you’re looking for a Flutter developer, React Native expert, or an experienced mobile app developer for iOS & Android, I’d be happy to help bring your idea to life.

🏆 Top Rated on Upwork with 10+ years of proven track record in Frontend and Backend development in various technologies. ✅ Ionic, Capacitor, Cordova, React-Native, Quasar Framework ✅ Android, iOS, React Native, Ionic ✅ API integration , Auth Libraries , Stripe ,Paypal, Email Integrations, Chatbot Integrations , Figma to React Native, SAAS, In App Purchase If you need a mobile app that works smoothly on both iOS and Android without hiring two separate developers you are in the right place. I build cross-platform mobile applications using React Native and IONIC that look native, perform fast, and scale with your business. With 5+ years of experience I have delivered apps across healthcare, e-commerce, finance, and SaaS from MVP to production. What I build: Cross-platform iOS & Android apps using React Native and IONIC Full stack mobile solutions with Node.js, Next.js and Python Django backends E-commerce apps with secure payment integrations (Stripe, PayPal) SaaS platforms and admin dashboards Figma to app, pixel perfect UI implementation API development and third party integrations App maintenance, optimization and ongoing support Why clients choose me: One developer. Both platforms. No compromise on quality. Clean code, proper architecture, built to scale Clear communication throughout — no surprises Fast delivery without cutting corners My tech stack: Mobile: React Native, IONIC, Expo Frontend: React.js, Next.js, Angular, TypeScript, Tailwind CSS Backend: Node.js, Express.js, Python Django Database: PostgreSQL, MongoDB, MySQL Tools: Git, Docker, Postman, CI/CD pipelines Send me a message with your app idea and I will tell you exactly how I would build it. KEYWORDS to search me: React Native, IONIC, iOS Development, Android Development, Cross-Platform App Development, Mobile App Development, Full Stack Development, Node.js, Next.js, React.js, API Integration, Expo, TypeScript, Python Django, MongoDB, PostgreSQL

An energetic and self-motivated Software Developer having 7 years of development experience with Agile projects & SPA applications. I have built high speed & scalable web and mobile applications for SaaS, Product base, B2B and B2C business models using TypeScript/JavaScript, Angular, Ionic, React and Node.js. I have great expertise in; - Design patterns, architecture designs and CI/CD processes - Tenacious technical problem solving skills - Good communication skills - 100% responsive designs using Illustrator, Photoshop, Figma, Html5/CSS3, SCSS, Bootstrap, Tailwind, PrimeNG and Material UI - Vanilla JavaScript development using HTML5/CSS3, Gulp - Angular development using CLI, Rxjs, Ngrx, Webpack, NPM, Jest, Karma, Jasmine, NPM - React development using react-create-app, MobX-State-Tree, Redux, WebPack - Native mobile app development using Ionic CLI, Capacitor, Cordova and Native APIs - API development using Node.js, ExpressJs, .Net Core, TypeORM and GraphQL - Socket based programming using Socket.IO - Automatic Deployments on Azure/AWS using Pipelines - Code management using Github, Gitlab, Azure and Bitbucket - Task management on Agile projects using JIRA, Trello and Azure - Extensive experience of working with version control, build tools, code-quality, testing tools and Docker Moreover, along with the vast exposure of SQL Server and PostgreSQL, I have hands-on experience with NoSQL databases like MongoDB, Firebase, Redis, SQLite and Elasticsearch. In addition, I have worked on various third party APIs integrations like Twillio, SendGrid, Facebook, Google, Sentry, RASA Chatbot and Stripe. Much of my experience comes from working for various clients, mainly from US, Canada, and Europe. I helped them developing solutions that can meet their business requirements. Always looking for interesting projects and will be happy to discuss your ideas and propose you the technical implementation for them.

I have 10 years of experience working in the Web & Mobile Development industry. I have been working on React, Tanstack Router, React Router, NextJS, NodeJS, NestJS, Expo, React Native, Angular, Ruby on Rails, Flutter, and Ionic frameworks. I work on HTML/CSS, SCSS, convert PSD to HTML/CSS/JS, and convert XD/Figma to HTML/CSS/JS. I have worked on more than 47+ applications during this period. I have great knowledge of Databases and architectural design of web applications due to my experience with different kinds of applications. I have managed and used multiple services on AWS i.e., EC2, S3, RDS, Aurora, Route53, SQS, and ELB to name a few. I have experience with deployment on Heroku, Digital Ocean, and Linode to name a few. I have graduated (Computer Engineering) from one of the top Universities in India (NIT Surat). I have been greatly interested in exploring new things and building great applications. Looking forward to working with you.