I'm a seasoned Full stack developer and business manager with over 8 years of experience building scalable applications. I specialize in high-performance systems using React and Node.js, having delivered 15+ production projects across various industries. My versatility allows me to excel as a Full stack developer whether the project requires Angular for complex dashboards or Wordpress for rapid landing page deployments. I bridge the gap between business goals and technical execution by mastering the core of the web: Javascript, HTML, and CSS. 🏆 PROVEN EXPERIENCE IN REAL PRODUCTS ✅ Developed 5+ high-traffic applications with React and Node.js serving millions of users. I optimized HTML structures and CSS styles to achieve 95–98% Core Web Vitals and cut load times by 80%. ✅ Built real-time logistics systems where Node.js backends meet Javascript frontends with 99% uptime. As a Full stack developer, I’ve successfully migrated legacy Angular platforms and managed global Wordpress sites. ✅ Created 10+ complex dashboards using Angular and React, often integrating Python scripts for advanced data processing. My deep knowledge of Javascript, HTML, and CSS ensures secure role-based access and seamless live updates. 📊 IMPACT I DELIVER AS A FULL STACK DEVELOPER 50–80% faster development cycles by working as a Full stack developer who synchronizes React and Node.js components perfectly. 60–90% performance gains through efficient Javascript execution and optimized CSS rendering in both Angular and custom apps. 40% fewer bugs by using Python for automated testing and maintaining clean HTML architecture in Wordpress environments. Successful launches of 12+ applications where Python handles heavy backend data while Node.js powers the real-time API. High scalability for 100k+ daily users, ensuring stability whether the frontend is built on React or Angular. 💡 WHY CLIENTS CHOOSE ME Deep Technical Expertise: I am a Full stack developer who can pivot from a Python microservice to a Javascript UI in minutes. Versatile Tech Stack: I maintain elite standards in Node.js environments while delivering pixel-perfect Wordpress solutions when speed is the priority. Core Standards: I treat HTML and CSS as first-class citizens, ensuring accessibility in every Wordpress, Angular, or React project. Proactive Growth: I use Python for automation to give my clients a competitive edge, ensuring their Javascript codebases remain clean and maintainable. 🛠 TECH STACK Frontend: React 18, Next.js 14, Angular, Javascript (ES6+), HTML 5, CSS 3 (Tailwind/SCSS) Backend: Node.js (NestJS/Express), Python (FastAPI/Django), PostgreSQL, MongoDB Deployment: Docker, AWS, Vercel, Wordpress hosting 📩 If you need a Full stack developer to scale your React frontend, harden your Node.js backend, or optimize the HTML and CSS of your Angular, Python, or Wordpress project—let’s connect!

Hey there! I’m Oleksandr, a Senior Full Stack Developer focused on building SaaS platforms, marketplaces, and business applications with React, Next.js, and Node.js. Most of my work is centered around products with complex workflows, payments, dashboards, role-based systems, and scalable backend architecture. I work closely with startups and growing teams to take products from early planning stages to stable production systems used by real customers. I’m comfortable handling both frontend and backend development, improving existing codebases, and building new features with long-term scalability in mind. Some of the platforms I’ve worked on include property management systems, booking marketplaces, operations dashboards, eCommerce platforms, and subscription-based products. 🚀 What I usually work on ✅ SaaS platforms and internal business systems ✅ Marketplace products with multi-role workflows ✅ Admin dashboards and operations tools ✅ Payments, subscriptions, and billing systems ✅ Booking and scheduling platforms ✅ API integrations and third-party services ✅ React Native companion apps ✅ Performance optimization and scaling ⚙️ Tech Stack Frontend: React, Next.js, TypeScript, Redux Backend: Node.js, Express.js, REST APIs Database: PostgreSQL, MongoDB Mobile: React Native, Firebase Infrastructure: Docker, AWS, CI/CD I care about writing maintainable code, keeping communication clear, and building products that are stable long-term, not just quick MVPs. I’m also comfortable joining existing teams, working inside mature codebases, and helping improve architecture and development workflows when needed. If you’re building a SaaS product, marketplace, or internal platform and need a developer who can take ownership of features from planning to production, feel free to reach out.

📢 Available for new projects 📢 I am a Senior Backend Developer with over 10 years of commercial experience, focused on building scalable, secure, and high-performance backend systems that power modern web and mobile applications. As a dedicated professional, I work with complex architectures where reliability, performance, and long-term maintainability are critical. I help businesses transform ideas into robust products by applying proven software engineering practices and deep expertise in backend development, cloud infrastructure, and system design. My primary focus is backend development using Node.js, TypeScript, PostgreSQL, and cloud-native technologies. I specialize in designing APIs, microservices, distributed systems, and scalable data architectures capable of supporting growing products and high user loads. Alongside strong backend expertise, I have solid Full Stack experience. This allows me to efficiently collaborate across the entire product lifecycle, from database design and server-side logic to frontend integration and user-facing features. I understand how all layers of an application work together, enabling balanced technical decisions and faster product delivery. Throughout my career, I have worked across Fintech, AI, EdTech, Healthcare, and Retail industries. I’ve contributed to SaaS platforms, enterprise systems, and custom software solutions, consistently maintaining high engineering standards and delivering reliable business outcomes. My Go-To Tools: Backend: Node.js, TypeScript, NestJS, Express.js Databases: PostgreSQL, MongoDB, Redis Cloud & DevOps: AWS, Docker, Kubernetes, CI/CD Architecture: REST APIs, GraphQL, Microservices, Event-Driven Systems Frontend (Full Stack): React, Next.js, JavaScript, TypeScript Design & Collaboration: Figma, Agile, Product Development 💬 I am ready to start work right now — just drop me a message!

🏆 Top Rated Plus | 100% Job Success Score Proven track record of delivering high-quality enterprise solutions and custom software with maximum client satisfaction and zero friction. Need reliable Flutter Mobile App Development that performs flawlessly under real user load, scales seamlessly with your growth, and doesn’t require constant hotfixes after launch? As a Flutter Mobile Developer PM, I deliver production-ready, high-performance iOS and Android applications. My approach combines rock-solid scalable architecture, clean code, and seamless backend integration, ensuring your product remains ultra-stable during traffic spikes and heavy data usage. 📊 Our Agency Blueprint With 10+ years of agency experience in Flutter Mobile App Development, 250+ delivered projects, and 15,000+ hours spent mastering mobile architecture, we transform complex business ideas into high-performing digital ecosystems. On average, our team improves app performance by 40–60%, slashes crash rates by 30–45%, and boosts scalability capacity by 35–55% through structured architecture refactoring. ✨ Why Our Flutter Solutions Stand Out - Elite Status: Top Rated Plus with a flawless 100% Job Success Score. Global Scale: 250+ custom applications launched successfully across 45+ countries. - Industry Versatility: Deep expertise in SaaS, FinTech, Marketplaces, Healthcare, and Enterprise systems. - Speed & Stability: Advanced performance tuning that reduces load times by up to 60% and cuts crash rates by 40%. - Bulletproof Security: Secure authentication, multi-role systems, and data encryption. - Future-Proof Code: Clean, maintainable codebases that significantly lower long-term maintenance costs and support 5–10× user growth. 🚀 Flutter Mobile App Development Services 📌 Cross-Platform Flutter Development High-fidelity iOS and Android apps built from a single, optimized codebase. Custom mobile architecture tailored for long-term corporate scalability. UI/UX integration optimized for 60fps responsiveness and smooth animations. 📌 Backend & API Integration Secure backend connectivity aligned with strict Flutter Mobile App Development standards. REST/GraphQL API integration and real-time data synchronization (WebSockets). Seamless integration of payment gateways (Stripe, Apple Pay, Google Pay) and third-party SDKs. 📌 Architecture, Refactoring & Stabilization Rescuing and stabilizing legacy Flutter applications. Eliminating memory leaks and debugging complex crash loops. Codebase restructuring for enhanced maintainability and faster feature onboarding. 📌 Performance Optimization Deep app profiling and bottleneck detection. Advanced network request optimization and smart caching strategies. Minimizing backend latency impact on the mobile user experience. 📌 CI/CD, Deployment & PM Oversight Automated CI/CD pipelines for fast, reliable mobile releases. Full App Store & Google Play deployment management. Active Project Management (PM) ensuring transparent communication, clear milestones, and on-time delivery. 🔧 Workflow & Tech Stack Discovery & Analysis: Defining product goals, user journeys, and technical constraints to design a scalable Flutter Mobile App Development architecture. Architecture & Planning: Designing system logic, state management (Bloc, Provider, or Riverpod), and backend integration layers. Development & Integration: Writing clean Flutter code, connecting APIs, and ensuring pixel-perfect UI execution across all screen sizes. Testing & QA: Rigorous validation of performance under load, crash rates, and cross-device compatibility. Launch & Optimization: Structured production deployment with post-launch monitoring, typically boosting app efficiency by 40% within the first 90 days. 💡 Data-Backed Results (Recent Projects) Up to 60% faster app load times. Up to 40% reduction in crash frequency. Up to 50% improvement in API reliability. 5× growth in active users sustained without a single second of downtime. 🌎 Industries Supported 🏥 Healthcare & Telemedicine (HIPAA-compliant workflows) 🏦 FinTech & Secure Payments (High-security data handling) 🛒 Marketplaces & E-Commerce (High-traffic catalog & checkout optimization) 📈 SaaS & Data Analytics (Real-time dashboards & metrics) 🎓 EdTech & Learning Platforms (Smooth media streaming & offline modes) 🏢 Enterprise Tools (Internal business automation & role management) I serve as the PM for the mobile team, coordinating execution and ensuring stable product releases. 🚀 Let’s build a Flutter Mobile App Development solution that scales, performs, and grows with your users. 📞 Looking for a developer and PM who takes full responsibility for architecture and code stability? Send me a message, and let's discuss your project.

Senior Python engineer building AI automation and backends that hold up in production — n8n, LLM agents, Django & FastAPI. 15+ years and 50+ live apps behind me · 100% Job Success · Top Rated · built to ship on time and scale past v1. - Python + Django MVPs from idea to launch in 2–4 weeks - n8n automation that scales past the prototype - AI agents that reason over your private data I prefer to understand the problem before writing code — so you don't pay to rebuild it when requirements shift. ━━━━━━━━━━━━━━━━━━━━━━━ 🛠️ WHAT I BUILD ━━━━━━━━━━━━━━━━━━━━━━━ 1️⃣ AI Agents & RAG Claude / OpenAI agents over private docs, CRMs, and APIs. Tool-using agents, multi-step reasoning, and eval harnesses so you can trust the output. ↳ Claude · OpenAI · LangChain · LangGraph · Pydantic AI · MCP 2️⃣ n8n & Make Automation Production deployments, custom nodes, AI-enhanced workflows, and multi-system orchestration. ↳ 50+ workflows shipped — Telegram bots, Gmail/sales pipelines, CRM sync, IoT ingestion, scheduled jobs 3️⃣ API & CRM Integrations Airtable, Notion, HubSpot, Gmail, Stripe, Twilio, and custom REST/GraphQL. ↳ Webhook plumbing, data sync, internal CRMs, idempotent pipelines that don't double-fire 4️⃣ Python + Next.js Apps FastAPI / Django backends · Postgres / Supabase · Next.js frontends. ↳ Idea → shipped MVP in 2–4 weeks, with the architecture to grow into v2 ━━━━━━━━━━━━━━━━━━━━━━━ ✅ WHY CLIENTS WORK WITH ME ━━━━━━━━━━━━━━━━━━━━━━━ ◆ Architecture-first — we settle on the right approach before writing code, so requirements changes don't mean starting over. ◆ Proven track record — 15+ years, 50+ live apps, 100% Job Success, Top Rated. ◆ Reliable communication — fast replies, predictable delivery, clear status updates, no ghosting. ◆ Maintainable systems — code the next developer (or future-you) can extend without a rewrite. ━━━━━━━━━━━━━━━━━━━━━━━ 🧰 STACK ━━━━━━━━━━━━━━━━━━━━━━━ Languages — Python, TypeScript, JavaScript, SQL AI / LLMs — Claude, OpenAI, Gemini, LangChain, LangGraph, Pydantic AI, MCP, RAG, embeddings, vector DBs Backend — FastAPI, Django, Node.js, PostgreSQL, Redis, Supabase Frontend — Next.js, React, Tailwind, shadcn/ui Automation — n8n, Make, Zapier, Airtable, Notion, HubSpot Infra — Docker, GitHub Actions, AWS, Vercel ━━━━━━━━━━━━━━━━━━━━━━━ 📂 RECENT WORK ━━━━━━━━━━━━━━━━━━━━━━━ - AI agent over a private knowledge base — custom tool use + eval harness (Claude + LangChain + pgvector) - Sales pipeline automation — Gmail → AI summarization → Notion CRM with rolling per-contact context (n8n + Anthropic) - Tuya IoT energy ingestion — paginated API, signed requests, rate-limit handling (n8n + Postgres) - Proposal analytics system — custom funnel and dead-rate analysis across 900+ proposals (Python + Postgres) ━━━━━━━━━━━━━━━━━━━━━━━ 🎯 BEST FIT ━━━━━━━━━━━━━━━━━━━━━━━ Scoped projects (1–8 weeks) · part-time retainers (10–30 hrs/week) · AI MVP builds · or rescuing an automation that's outgrown its shape. Send me the problem and your constraints, and I'll come back with a concrete approach. I work best from specifics — let's build something that lasts.

👋 I'm a Full Stack Developer with 10+ years of experience as a Java and PHP software engineer. Over the past 9 years, I've also focused on frontend frameworks, working extensively with Spring, Laravel Yii Vue and React Prior to that, I gained valuable experience with CMS systems like Opencart and WordPress. 🚀 I've had the opportunity to collaborate with both small and large international teams (10+ members) and have developed expertise in project management tools such as Jira, Trello, and VCS. Additionally, I'm proficient in Linux systems and CI/CD processes. Throughout my career, I've worked on high-load systems, built server-side high-capacity applications, and developed complex multi-platform user interfaces.👍 💪 My technical Full Stack Developer skill set includes: ➜ Java Kotlin and PHP : 10+ years of experience with PHP ( Laravel Yii Symfony Zend ) and Java (Core/EE Vaadin Spring ) ➜ Frontend Frameworks: Experience with Vue.js React Nuxt.js Next.js Vuetify and Cordova specializing in creating responsive and usable interfaces. ➜ JavaScript and TypeScript: Strong skills in JavaScript and TypeScript to create dynamic and efficient applications. ➜ Backend Development: Experience with Node.js Express.js and AdonisJS to create scalable server-side solutions. ➜ Databases: Knowledge of MySQL PostgreSQL Redis MongoDB and others, optimizing database performance. ➜ API development and integration: Extensive experience in creating and integrating RESTful and GraphQL APIs, including third-party services such as Stripe and Twilio, etc. ➜ AI Integration: Hands-on experience integrating AI-based features. ➜ DevOps and tools: Proficient in Git, Docker, Jenkins, and Jira, ensuring CI/CD and project management runs smoothly. 📌 When you choose to work with me ( Experienced Full-Stack Developer ), you’re partnering with a developer who not only understands your goals but is also dedicated to delivering outstanding solutions. I place a strong emphasis on customer satisfaction, and my commitment to engineering excellence ensures that I create value at every stage of the project.🚀 🏆 Our experience in Full-Stack development : ✔️ 10+ years of experience in web and mobile Full Stack development ✔️ 250+ projects for startups, SaaS platforms E-commerce + Marketplace, Booking Platforms, MVPs, AI chatbots / AI solutions ✔️ 22,574+ hours worked on Upwork ✔️ 42+ countries we operate in providing top-notch web development solutions ✔️ AI & automation ready - experience with AI chatbots, OpenAI integrations, and content automation ✔️ From idea to launch - UI/UX design, frontend & backend development, QA, and post-launch support ✔️ Flexible and client-focused - personalized approach, clear communication, and full dedication to results 📌Full-Stack Development AI & Chatbot Development Expertise ( Full-Stack Developer ) 🔸 Extensive experience in building AI-powered solutions, including custom GPT-based chatbots, document analysis tools, and intelligent automation systems 🔸 Integration with OpenAI API (GPT-3.5/4) for chatbot creation, semantic search, text summarization, language translation, and prompt-driven workflows 🔸 LangChain & Prompt Engineering – building multi-step, context-aware interactions for advanced conversational agents 🔸 Real-world use cases: Legal & medical document parsing, customer support bots, smart assistants for booking/e-commerce platforms 🔸 Secure & scalable architecture – including role-based access control, user session management, and protected endpoints for AI services 🔸 Hybrid solutions – AI integrated into full-stack applications (React / Vue + Node.js / NestJS) with real-time data flow and third-party APIs (Twilio, Slack, Stripe, CRM systems) 🔸 Cloud-ready & optimized – deployed via AWS, Vercel, Supabase, with performance monitoring and cost-effective API usage strategies 🔸 100% rapid prototyping to production – from PoC to polished tools with clean UI/UX and user-centric flow 🔸 Continuous collaboration with product teams to refine AI logic and ensure high relevance and response quality 🔸 AI Tools I Use- Botpress / Lovable / Cursor Bolt.new / Deepgram / n8n / Make / Zapier 📌 Full-Stack Web & SaaS / E-commerce Development Expertise ( Full-Stack Developer ) 🔹 10+ years of hands-on experience in building scalable web & mobile applications 🔹 250+ completed projects - from MVP to production-ready SaaS platforms 🔹 Full product cycle: from idea validation and prototyping to launch and post-release support 🔹 Modern stack: Vue \ Nuxt, React \ Next.js Node.js JavaScript TypeScript, NestJS, Node js PostgreSQL, MongoDB, AWS, Supabase & more 🔹 AI Integration: OpenAI, LangChain, chatbot development, prompt engineering, GPT-based tools 🔹 Marketplace, E-commerce, Booking Platforms - tailored logic, secure payments, real-time updates 🔹 API Integrations: Stripe Slack Twilio OpenAI CRM systems, social media API 🔹 Efficient & secure architectures -clean code modular structure role-based access

✅ 𝗧𝗼𝗽 𝟬.𝟭% 𝗨𝗽𝘄𝗼𝗿𝗸𝗲𝗿. 𝟭𝟯+ 𝘆𝗲𝗮𝗿𝘀 𝗽𝗿𝗼𝗳𝗲𝘀𝘀𝗶𝗼𝗻𝗮𝗹 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲. ✅ 𝗘𝘅𝘁𝗲𝗻𝘀𝗶𝘃𝗲 𝘀𝘁𝗮𝗿𝘁𝘂𝗽 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 𝗮𝗻𝗱 𝘀𝗽𝗲𝗰𝗶𝗮𝗹𝗶𝘇𝗮𝘁𝗶𝗼𝗻 ✅ 𝗟𝗼𝘃𝗲 𝘄𝗼𝗿𝗸𝗶𝗻𝗴 𝘄𝗶𝘁𝗵 𝗰𝗹𝗶𝗲𝗻𝘁𝘀 𝗹𝗼𝗻𝗴-𝘁𝗲𝗿𝗺 𝗮𝘀 𝘁𝗵𝗲𝘆 𝘀𝗰𝗮𝗹𝗲 ✅ < 𝟭-𝗵𝗼𝘂𝗿 𝗽𝗮𝗶𝗱 𝗰𝗹𝗶𝗲𝗻𝘁 𝗿𝗲𝘀𝗽𝗼𝗻𝘀𝗲 𝘁𝗶𝗺𝗲𝘀 ✅ 𝟭𝟱𝟬+ 𝗰𝗹𝗶𝗲𝗻𝘁𝘀 𝘀𝘂𝗽𝗽𝗼𝗿𝘁𝗲𝗱 𝗶𝗻𝗰𝗹𝘂𝗱𝗶𝗻𝗴 𝗚𝘂𝗶𝗻𝗻𝗲𝘀𝘀 𝗮𝗻𝗱 𝗲𝘃𝗲𝗻 𝗳𝗼𝗿𝗲𝗶𝗴𝗻 𝗶𝗻𝘁𝗲𝗹𝗹𝗶𝗴𝗲𝗻𝗰𝗲 𝘀𝗲𝗿𝘃𝗶𝗰𝗲𝘀. Hey I’m Anton! I specialize in development solutions for US, EUR & CAD startups, turning ideas into brilliantly functioning solutions with Python, Django & top-notch full-stack development tools. 📞 𝗦𝗲𝗻𝗱 𝗺𝗲 𝗮 𝗱𝗶𝗿𝗲𝗰𝘁 𝗺𝗲𝘀𝘀𝗮𝗴𝗲 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸 𝗼𝗿 𝗶𝗻𝘃𝗶𝘁𝗲 𝗺𝗲 𝘁𝗼 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝘁𝗼 𝗯𝗼𝗼𝗸 𝗮𝗻 𝗶𝗻𝗶𝘁𝗶𝗮𝗹 𝗰𝗼𝗺𝗽𝗹𝗶𝗺𝗲𝗻𝘁𝗮𝗿𝘆 𝗰𝗼𝗻𝘀𝘂𝗹𝘁𝗮𝘁𝗶𝗼𝗻 𝗰𝗮𝗹𝗹 𝘁𝗼𝗴𝗲𝘁𝗵𝗲𝗿. 📞 — 𝗠𝘆 𝗴𝗲𝗻𝗶𝘂𝘀 𝘇𝗼𝗻𝗲 𝗿𝗲𝘃𝗼𝗹𝘃𝗲𝘀 𝗮𝗿𝗼𝘂𝗻𝗱: ☑️ Building a product that solves your current challenges and, if it’s your goal, maximizes the likelihood you get successfully funded by investors. ☑️ Guiding clients to avoid pitfalls common to the stage of their startup. ☑️ Implement the right tech stack from day 1. Significantly reducing headaches and costs. ☑️ Exceptional project management. You always understand what’s being done and what’s next. No mysterious invoices. ☑️ Ongoing education - you and your team know exactly how your solution works, and more importantly, it actually does work. ⭐⭐⭐⭐⭐ ❝ I had the pleasure of working with Anton on a Python project that demanded both high-level expertise and meticulous attention to detail. Not only did he deliver exceptional code that was well-crafted, efficient, and thoroughly documented. He also showcased an incredible knack for proactive problem-solving. He anticipated challenges before they could become obstacles, thereby streamlining the workflow and saving valuable time. In addition, his communication skills were impeccable, making complex technical solutions easily digestible without sacrificing nuance or detail. Meeting all deadlines ahead of schedule. Anton exhibited a level of professionalism and reliability that respects the highest standards. ❞ 🗣 𝘿𝙧. 𝙅𝙪𝙖𝙣 𝙎𝙪𝙖𝙧𝙚𝙯 - 𝘾𝙤-𝙛𝙤𝙪𝙣𝙙𝙚𝙧/𝘾𝙊𝙊 - 𝙃𝙚𝙖𝙡𝙩𝙝𝙁𝙤𝙧𝙘𝙚 (𝗛𝗲𝗮𝗹𝘁𝗵𝗰𝗮𝗿𝗲 𝗣𝗿𝗼𝗰𝗲𝘀𝘀 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻) 🗣 ⭐⭐⭐⭐⭐ Technical expert in Python & Django but offer full-cycle project support including full-stack development (backend and front-end), project management, deployment and post-launch support. 𝗛𝗶𝗴𝗵𝗹𝗶𝗴𝗵𝘁𝘀 𝗼𝗳 𝘁𝗵𝗲 𝘁𝘆𝗽𝗲𝘀 𝗼𝗳 𝘄𝗼𝗿𝗸 𝗜 𝗲𝘅𝗰𝗲𝗹 𝗮𝘁 𝗱𝗲𝗹𝗶𝘃𝗲𝗿𝗶𝗻𝗴 𝗶𝗻𝗰𝗹𝘂𝗱𝗲: ☑️ Backend Development - Python - Django - Django REST - FastAPI - Flask - PostgreSQL - Celery - Docker ☑️ API Solutions - API Development - API Integrations ☑️ MVP Development - POC Development ☑️ Web Development & Web App Development - Portals ☑️ Software Development ☑️ Cloud Development Solutions - Amazon Web Services - AWS - Microsoft Azure - Google Cloud Platform - GCP - DigitalOcean - Heroku ☑️ Digital Transformation - From Offline To Online 𝗡𝗶𝗰𝗵𝗲𝘀 & 𝗶𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗲𝘀 𝗜 𝗵𝗮𝘃𝗲 𝗲𝘅𝘁𝗲𝗻𝘀𝗶𝘃𝗲 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 𝘄𝗶𝘁𝗵 𝗶𝗻𝗰𝗹𝘂𝗱𝗲: 🔸 SaaS - Tech - Startups 🔸 Healthcare 🔸 eCommerce & Retail 🔸 Fintech 🔸 Manufacturing 🔸 Real Estate 🔸 E-sport (Gaming) 🔸 Fleet Management 🔸 Hospitality 📞 𝗦𝗲𝗻𝗱 𝗺𝗲 𝗮 𝗱𝗶𝗿𝗲𝗰𝘁 𝗺𝗲𝘀𝘀𝗮𝗴𝗲 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸 𝗼𝗿 𝗶𝗻𝘃𝗶𝘁𝗲 𝗺𝗲 𝘁𝗼 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝘁𝗼 𝗯𝗼𝗼𝗸 𝗮𝗻 𝗶𝗻𝗶𝘁𝗶𝗮𝗹 𝗰𝗼𝗺𝗽𝗹𝗶𝗺𝗲𝗻𝘁𝗮𝗿𝘆 𝗰𝗼𝗻𝘀𝘂𝗹𝘁𝗮𝘁𝗶𝗼𝗻 𝗰𝗮𝗹𝗹 𝘁𝗼𝗴𝗲𝘁𝗵𝗲𝗿. 📞 I appreciate the time you’ve taken to learn more about me! Look forward to getting a chance to talk soon. Anton Pavlovych ⭐⭐⭐⭐⭐ ❝ Working with Anton was an outstanding experience! Communication was excellent throughout the collaboration, with daily updates and consistent progress reflected in GitHub. He was incredibly professional, reliable, and remained on the project for several months, which was a highlight for us after past challenges with other agencies. We highly recommend Anton and look forward to working with him again. Thank you for the fantastic collaboration! ❞ 🗣 𝙆𝙚𝙫𝙞𝙣 𝙆𝙪𝙝𝙣 - 𝘾𝙀𝙊 - 𝙂𝙤𝙥𝙛 (𝘼𝙜𝙚𝙣𝙩𝙞𝙘 𝘼𝙄 𝙎𝙤𝙡𝙪𝙩𝙞𝙤𝙣𝙨) 🗣 ⭐⭐⭐⭐⭐

Client's review ⭐⭐⭐⭐⭐ 5.0 "Their work was excellent. Alesia and the team were great to work with. They helped me get my start-up from idea to MVP. They were professional, organized, detail-oriented, and above all, got the job done. I would absolutely recommend Alesia and team to other clients." ➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖ 150+ Marketplaces Launched | Verified Stripe & Sharetribe Partner ➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖ Are you looking for an expert Sharetribe developer and Full Stack developer to build a high-performing multi vendor marketplace? Whether you are launching a startup or scaling an enterprise platform, Roobykon Software specializes in creating robust, scalable solutions using Sharetribe, Sharetribe Flex, and Sharetribe Go. As an Official Sharetribe development partner and Stripe verified partner with over 14 years of experience, our team of skilled marketplace developers has launched over 150 successful platforms. We deliver secure, customized ecommerce and marketplace solutions tailored to your unique vision. We don't just write code; we build businesses. From Airbnb-style rental platforms to Amazon - like e-commerce sites, we have successfully delivered over 150 marketplaces for clients in 50+ countries. ✔️ Expertise in the Sharetribe Ecosystem: ➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖ 🔸Sharetribe Flex: Custom-tailored marketplace development for unique user flows and advanced API integrations. 🔸Sharetribe Go: Rapid deployment and customization for SaaS-based marketplace solutions. 🔸Customization & Migrations: Moving platforms from WordPress, Bubble, WooCommerce, Shopify, and Magento to a dedicated Sharetribe environment. ✔️Core Tech Stack: ➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖ ▪️Backend: Ruby, Ruby on Rails, Node.js, PHP, Laravel, Python ▪️Frontend: React, JavaScript, Next.js, jQuery, HTML5, CSS3 ▪️Mobile Apps: React Native ▪️Cloud & DevOps: Amazon Web Services (AWS), DevOps, API Integration ▪️CMS: WordPress Why Choose Me? ➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖ 🔹#1 Sharetribe Development Team: Verified Sharetribe partner and trusted by Sharetribe itself to help build their platform. 🔹With over 150 marketplaces successfully developed, we have built marketplace websites similar to Amazon, Airbnb, Booking, Etsy, TaskRabbit, Facebook Marketplace, Wallmart Marketplace, and others. 🔹End-to-End Solutions: Discovery phase, UI/UX design, full stack development, and long-term maintenance. 🔹Payment & Integration Experts: Advanced setup for Stripe Connect, PayPal, MangoPay, and Tipalti, including complex transaction flows and tax automation (Stripe Tax, Avalara). 🔹SEO & Growth Focused: We build with SEO for marketplaces in mind to ensure your platform is discoverable from day one. Our team specializes in developing a range of e-commerce and multi-vendor platforms, including product marketplaces, service marketplaces, job and gig marketplaces, rental marketplaces, NFT marketplaces, and real estate marketplaces. Marketplace Features We Specialize In: ➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖ ▫️Instant & Request-based booking systems. ▫️Reverse marketplaces (customers post, vendors bid). ▫️Subscription models and tiered membership features. ▫️Multi - currency and global shipping integrations. ▫️AI - driven features for search and recommendations. I am ready to rescue "failed" projects or start your vision from a clean slate. Let’s turn your marketplace idea into a competitive, revenue-generating reality. Click the "Hire" button or book a consultation to discuss your project requirements!

I build mobile and web apps that feel fast, reliable, and easy to use — whether native mobile apps (Kotlin for Android, Swift for iOS), cross-platform apps (Flutter, React Native), or modern web applications (React, Next.js, Node.js). My goal is to make your product run smoothly, scale easily, and grow with your business. With a Ph.D. in Computer Science and 10+ years of development experience, I've successfully delivered 90+ iOS, Android, and web applications on Upwork — including custom solutions for logistics, healthcare, booking, education, and business automation. 💡 What I Do Best - Cross-platform mobile app development with Flutter & React Native - Native Android app development using Kotlin - Native iOS app development using Swift - Web application development with React, Next.js, and Node.js - Design of clean, maintainable architecture with scalability in mind - Integration of REST APIs, Firebase, AWS, and Supabase - Support for offline mode, background services, and push notifications - Performance optimization, UX improvements, and deployment (App Store, Google Play, web hosting) 🧠 Why Clients Choose Me I combine strong technical expertise with a product mindset — not just delivering code, but building reliable, user-friendly products that support long-term growth. Whether you're building an MVP or scaling an existing application, I can help you choose the right tools and technology stack for both mobile and web. 💬 Let's Build Something Solid If you're looking for a developer who covers both mobile and web ecosystems, let's discuss your next project.

⭐⭐⭐⭐⭐ "𝘞𝘦 𝘸𝘦𝘳𝘦 𝘷𝘦𝘳𝘺 𝘩𝘢𝘱𝘱𝘺 𝘸𝘪𝘵𝘩 𝘵𝘩𝘦 𝘨𝘳𝘦𝘢𝘵 𝘸𝘰𝘳𝘬 𝘲𝘶𝘢𝘭𝘪𝘵𝘺 𝘈𝘯𝘯 𝘱𝘳𝘰𝘷𝘪𝘥𝘦𝘥 𝘢𝘯𝘥 𝘵𝘩𝘦 𝘕𝘢𝘵𝘪𝘧𝘦 𝘔𝘰𝘣𝘪𝘭𝘦 𝘵𝘦𝘢𝘮. 𝘐𝘧 𝘸𝘦 𝘳𝘦𝘲𝘶𝘪𝘳𝘦 𝘢𝘯𝘺 𝘸𝘰𝘳𝘬 𝘢𝘨𝘢𝘪𝘯, 𝘸𝘦 𝘸𝘪𝘭𝘭 𝘥𝘦𝘧𝘪𝘯𝘪𝘵𝘦𝘭𝘺 𝘶𝘴𝘦 𝘵𝘩𝘦𝘮." 🤝 𝐈 𝐜𝐨𝐝𝐞, 𝐚𝐝𝐯𝐢𝐬𝐞, 𝐚𝐧𝐝 𝐜𝐚𝐫𝐞 𝐟𝐨𝐫 𝐲𝐨𝐮𝐫 𝐩𝐫𝐨𝐝𝐮𝐜𝐭 𝐥𝐢𝐤𝐞 𝐢𝐭’𝐬 𝐦𝐢𝐧𝐞 𝐟𝐫𝐨𝐦 𝐭𝐡𝐞 𝐬𝐭𝐚𝐫𝐭. 👋 Hi! I’m Ann an Android & iOS mobile app developer Swift Kotlin mobile app development expert with 8+ years of experience building high-performance iOS apps, Android apps, and scalable cross-platform solutions with React Native. 🚀 Android & iOS Mobile App Developer | Swift • Kotlin • React Native | Mobile App Development As a Top Rated Plus Android & iOS mobile app developer Swift Kotlin mobile app development specialist on Upwork with 30+ five-star reviews and a 100% Job Success Score, I’ve helped 60+ companies and startups transform ideas into scalable, future-proof mobile products. Whether you need a native iOS app with Swift, a native Android app with Kotlin, or a cross-platform solution, I deliver Android & iOS mobile app development using Swift and Kotlin with precision, creativity, and enterprise-grade quality. From e-commerce, fitness, and healthcare to fintech, streaming, logistics, and wearable apps, my experience as an Android & iOS mobile app developer Swift Kotlin mobile app development professional spans 15+ industries and 50+ published apps. ✅ Why Partner with Me as Your Android & iOS Mobile App Developer: 8+ years of hands-on Android & iOS mobile app development using Swift, Kotlin, React Native 50+ successful iOS and Android apps delivered in Fitness Mobile App (Coaches, Gyms & AI Meal Plans) 10+ successful iOS and Android apps delivered in Fintech industry A strong mobile app development team of 50+ experts 100% Job Success Score and consistent 5-star reviews on Upwork Streaming, TV apps GPS and Map-based apps ( GPS trackers, MapBox, Google Maps integration) AI Mobile App Development MVP App Development for Wellness and Hospitality Platform Dating Mobile App Social Media App Development Mental Health Social Platform Enhance an Android, IOS mobile apps Figma designer. UX/UI designer Real Estate mobile apps Full-cycle Android & iOS mobile app development — from idea to App Store & Google Play launch AI App Expert specializing in Swift Kotlin mobile app development, on-device ML, real-time image & text processing, and LLM API integrations 🔧 Services I Provide as an Android & iOS Mobile App Developer (Swift & Kotlin): Native iOS app development with Swift & SwiftUI Native Android app development with Kotlin & Jetpack Compose Android & iOS mobile app development using Swift Kotlin architecture React Native app development for cross-platform solutions UI/UX design for iOS and Android apps (Figma, Sketch, Adobe XD) Secure API integrations & cloud services (AWS, Google Cloud) Scalable backend connections & microservices Wearable app development (Apple Watch, Wear OS, Bluetooth) Performance optimization & offline-first mobile app development 🎯 Industries I Specialize In as an Android & iOS Mobile App Developer (Swift Kotlin): 📦 E-Commerce | 🍔 Food & Drink | 📚 Education 💪 Health & Fitness | 💘 Dating | 🎬 Entertainment & Streaming 💼 Finance & Banking | 🌍 Travel | 📱 SaaS Platforms ⌚ Wearables & IoT | 🚚 Logistics & Booking Apps All powered by Android & iOS mobile app development with Swift and Kotlin. 🚀 Advanced Features I Build with Swift & Kotlin Mobile App Development: ✔️ Social login (Google, Apple, LinkedIn) ✔️ Real-time chat, WebRTC video calls & push notifications ✔️ Offline mode & smart data synchronization ✔️ GPS, geolocation, Bluetooth & geofencing ✔️ ARKit & advanced AR features ✔️ Firebase & cloud integrations ✔️ Monetization (AdMob, Meta Ads) ✔️ Voice assistants (Siri, Google Assistant, Alexa) ✔️ TV apps (tvOS, Android TV) & wearable tech (Garmin, Monkey-C) 💬 Why Choose Me as Your Android & iOS Mobile App Developer (Swift Kotlin): I bring deep expertise in Android & iOS mobile app development using Swift and Kotlin, focusing on clean architecture, scalability, performance, and business impact. Whether you’re a startup building an MVP or an enterprise scaling globally, I’m the Android & iOS mobile app developer Swift Kotlin mobile app development expert who can turn your vision into a successful product. 📱 Let’s connect and build a powerful Android & iOS mobile app with Swift and Kotlin. 🚀 Your trusted Android & iOS mobile app developer Swift Kotlin mobile app development partner is just one click away. UPD: 05.06.2026