🔥 10 years of Full-stack experience / Clean code / Best practices / Always in touch Strong experience in developing SPA, SaaS, Marketplaces, CRM systems, RESTful APIs. Projects support / Creating projects from scratch / Creating new features / unit/e2e tests coverage / CI/CD My key skills: ✅ JS/TS ✅ React, Redux, RTK, Zustand, Jotai, Recoil, Signals, Context, TanStack ✅ Next, Gatsby, ReactNative ✅ PWA, Push Notifications, Cache, WebRTC, WebSocket ✅ CSS, SCSS, Flex, Grid, Tailwind, Styled-components ✅ Node, Express, Nest ✅ MySQL, MongoDB, PostgreSQL, Supabase, ORMs (Prisma, Drizzle) ✅ AI Development/AI APIs ✅ AWS, Firebase, Render, Azure, Google Cloud ✅ CI/DC, GH Actions, Gitlab Pipeline, Jenkins ✅ Unit, e2e, eslint/tslint/prettier, app monitoring systems ✅ Git This is just a list of technologies. But most importantly, I treat each project with special care because I love my job.

I am a Senior Full-Stack Developer with 7+ years of experience building scalable web applications, high-performance mobile apps, and AI-powered systems used in production. I specialize in end-to-end product development with a strong focus on mobile-first architecture and AI-driven features. My expertise spans full-stack web development, cross-platform mobile app development, AI integration, and UI/UX implementation. I help startups and businesses build MVPs, SaaS platforms, dashboards, and customer-facing applications that are reliable, secure, and easy to scale. Web and Mobile Development Full-stack web development (React, Next.js, JavaScript, TypeScript) Mobile app development (Flutter, React Native, iOS, Android) Responsive design, mobile-first UI, cross-browser compatibility API-driven architecture, REST APIs, third-party integrations SaaS applications, MVP development, dashboards, admin panels AI Development and Integration AI chatbots, AI assistants, LLM integrations OpenAI, GPT-based systems, embeddings, prompt engineering AI automation, intelligent workflows, AI-powered search Recommendations, data-driven features, AI-enhanced UX Backend and Cloud Backend development, server-side logic, API design Authentication, authorization, database integration Cloud deployment, scalable services, performance optimization Secure, maintainable, production-ready code UI/UX and Frontend Modern UI development, component-based architecture Figma to code, design systems, reusable components Performance optimization, accessibility, clean UX How I Work Senior-level ownership, architecture, and technical leadership Clean code, scalable systems, and long-term maintainability Clear communication, transparent estimates, reliable delivery Agile development, iterative delivery, product-focused mindset If you’re looking for a senior full-stack developer with deep expertise in web development, mobile app development, and AI integration, I can help you design, build, and scale your product from idea to production.

I help clients turn ideas into complete, production ready software from start to finish. Instead of hiring separate frontend, backend, database, and integration specialists, you can hire one developer who can handle the full process and deliver a custom solution built around your exact needs. I specialize in full stack web and mobile development using Java, Spring Boot, PHP, JavaScript, TypeScript, React, Next.js, React Native, MySQL, MongoDB, Firebase, Tailwind CSS, and Git. My strongest backend stack is Java with Spring Boot, and I build fast, scalable, and maintainable systems with clean architecture and reliable API design. On the frontend, I create modern, responsive, user focused applications for web and mobile. On the backend, I build secure business logic, databases, admin systems, integrations, and internal tools. I also handle testing, including integration testing, to make sure everything works reliably before delivery. I do not believe in one size fits all solutions. Every project I take on is developed around the client’s goals, workflow, and long term vision. Whether you need an MVP, a business platform, a mobile app, an ERP system, or a complete custom product, I can build it end to end with clear communication and a strong focus on quality.

🚀 Key Skills & Expertise ✔️ 5+ years of professional experience delivering scalable and high-quality software ✔️ Programming Languages: Java, C# ✔️ Frameworks: Spring Boot, Spring MVC, Hibernate, JPA, Thymeleaf, Angular ✔️ Front-End: HTML5, CSS3, Bootstrap, JavaScript, Angular, AJAX, TypeScript ✔️ Databases: MySQL, PostgreSQL, MongoDB ✔️ DevOps & Cloud: Docker, Kubernetes, AWS, Apache Kafka ✔️ E-Commerce Platforms: Shopify, WordPress, OpenCart 🤝 Why Work With Me ✔️ Fluent in English, German, and Bulgarian (native) ✔️ Reliable, detail-oriented, and committed to clean, maintainable code ✔️ Excellent communication and strong focus on client satisfaction ✔️ Available, responsive, and easy to collaborate with

Top Rated | 100% Job Success | 15+ Years of Software Development Experience Trusted by global brands including BMW, Nestle, VW Audi, and NEC. I help businesses build AI-powered products, automation systems, and scalable web platforms. My focus is combining modern AI tools with robust backend development to automate workflows, reduce manual work, and launch new digital products faster. Over the past 15+ years I have delivered complex systems for startups, agencies, and enterprise companies including SaaS platforms, AI automation tools, and large scale APIs. Core Expertise AI Automation & AI Agents Building intelligent workflows using OpenAI GPT, AI APIs, Python, and automation frameworks. AI tools and technologies I work with OpenAI GPT API ChatGPT integrations AI Agents and autonomous workflows LangChain Vector databases and embeddings YOLO computer vision models AI content generation pipelines AI powered SaaS products Backend & SaaS Development Laravel SaaS platforms REST APIs and microservices High performance backend systems Queue systems and background processing Multi tenant applications Automation Systems Business workflow automation Lead generation automations AI marketing automation Data scraping and enrichment CRM and API integrations Automation tools I work with n8n Make (Integromat) Zapier Custom Python automation scripts Webhook based automation systems API Integrations Stripe OpenAI Anthropic Claude Google APIs Mailchimp SendGrid HubSpot Shopify Custom third party APIs Ecommerce Development WooCommerce Shopify integrations OpenCart Payment gateway integrations Subscription systems AI Computer Vision YOLO object detection Image analysis systems AI video processing Custom machine learning pipelines Why Clients Work With Me 15+ years real world engineering experience Top Rated Upwork freelancer with 100 percent Job Success Strong architecture thinking not just coding Ability to build complex systems end to end Fast communication and reliable delivery Client Feedback "Martin is fast yet quality conscious, responsible, and a great initiative taker. He tackled every problem fearlessly and with great success." If you need a developer who understands both AI technologies and scalable backend systems, I can help you design and build the right solution. Send me a message and tell me about your project.

Turn your WordPress dream into reality! I'm your WordPress and WooCommerce expert, ready to breathe life into your website. From customizing pre-made themes to creating unique, tailor-made solutions – I'll help you achieve your goals. Forget about technical complexities, I'll take care of everything: from selecting and installing themes and plugins to building your website from scratch, so it's not just functional, but also impressive! My Expertise in WordPress Website Design and CMS Development: • WordPress responsive design • Creating custom WordPress themes • Wordpress Theme • WordPress child theme building • PSD to Wordpress • Figma to Wordpress • AI to Wordpress • Adobe XD to Wordpress • Wix to Wordpress • Wordpress Malware Removal • Work with Child themes, editing an existing theme • WordPress theme customization • WordPress bug fixing & maintenance • Woo-commerce Store • Html to WordPress theme • WordPress Plugin • WordPress e-Commerce • Plugins for Wordpress • Theme Customization • Theme Development • Plugin Development • Plugin Customization Specialized in Page-Builder on which I am well versed: • Divi Builder • Elementor • Elementor Pro • Fusion Builder • Gutenberg • Oxygen Builder • Site Origin • WP bakery/Visual Composer Apart from this, I have expertise in these kinds of Themeforest WordPress Theme: • Astra theme • Avada theme • Biolife theme • DIVI theme • Enfold theme • Flatsome Theme • Jupiter theme • Mgana theme • Thrive theme • TIGER theme • The Core theme • And many more... I am expert integration & Customization Wordpress Plugins: • Contact Form 7 • Elementor • Formidable Forms • Gravity Forms • Ninja Forms Further, • I have a very good eye with HTML5/CSS3, JS, JQ, and well versed in Responsive Web Designs, • Extensive experience in both front-end and back-end server-side experience with UI/UX design experience. • Experienced in Landing page development. I have unique processes that allow us to offer value in terms of creativity, quality, speed & price and My goal is to get you the highest-quality work as quickly as possible. Best Regards Volodymyr Chui Wordpress Expert

Hi, I'm Petar 👋 I'm a top 1% performer on Upwork and one of Bulgaria's leading AI automation experts. Over the past 6+ years, I've built and shipped 50+ client systems for teams ranging from fast-growing startups to large enterprises. I've also had the opportunity to work with major companies like DraftKings and Visa on automation initiatives. I help teams stop wasting time on repetitive manual work by building AI systems that actually run in production. Most automation freelancers can only connect existing tools. When you need something custom, intelligent, or properly integrated with your systems, they usually can’t deliver. I can - because I’m a full-stack developer who builds real software, not just no-code workflows. What I build for clients: - Custom AI Agents: agents that do real work on autopilot - qualify leads, process documents, answer customers, generate reports, and take action. They connect to your data and tools, run on your infrastructure, and keep working reliably every day. - Production Workflow Automation: clean, maintainable automations in n8n that connect your CRM, email, databases, payments, and internal tools - with proper error handling so they don’t break silently. - Custom AI Systems: when off-the-shelf tools aren’t enough, I build exactly what your business needs using real code. You’re not limited by what a no-code platform supports. Technologies I work with: 𝗔𝗜 𝗔𝗴𝗲𝗻𝘁𝘀: Claude Code • MCP • RAG • Hermes • OpenClaw 𝗔𝗜 𝗠𝗼𝗱𝗲𝗹𝘀: Claude Opus/Sonnet • GPT • Gemini • LLaMA • DeepSeek • Grok 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻: n8n • Python • Node 𝗖𝗥𝗠 & 𝗗𝗮𝘁𝗮: HubSpot • Salesforce • GoHighLevel • Pipedrive • Zoho • Airtable • Notion • Supabase • Postgres 𝗗𝗲𝘃: REST • Webhooks • OAuth 𝗩𝗼𝗶𝗰𝗲: Vapi • Synthflow • Retell 𝗩𝗶𝘀𝗶𝗼𝗻/𝗠𝗲𝗱𝗶𝗮: Veo • GPT-Image • Sora • RunwayML • NanoBanana 𝗦𝗰𝗿𝗮𝗽𝗶𝗻𝗴: Playwright • Browser Use • Apify • FireCrawl 𝗣𝗮𝘆𝗺𝗲𝗻𝘁𝘀: Stripe • QuickBooks • Plaid • Square Why clients choose me: ✅ I bring senior engineering thinking, not just tool knowledge ✅ Systems that are reliable, maintainable, and built to scale ✅ Clear communication and predictable delivery ✅ Top 1% performer on Upwork with 50+ systems shipped for startups and enterprises If you’re tired of automations that only work until something changes, let’s talk.

If your backend is slow, broken, or not behaving as expected — I can fix it. I’m a backend developer with 13+ years of experience, focused on Laravel, PHP, and MySQL systems. I specialize in debugging, fixing, and improving existing applications — especially when things are already going wrong. 🔧 What I help with: • Fixing bugs in Laravel applications • Debugging APIs, webhooks, and integrations • Optimizing slow MySQL queries and database performance • Repairing broken cron jobs, queues, and background workers • Cleaning up messy or legacy PHP code • Server-side issues (NGINX, Apache, Linux environments) ⚡ Typical results: • Faster applications (query optimization, caching) • Stable background jobs and queues • Reliable API integrations • Reduced errors and downtime 🧠 Why clients work with me: • I don’t guess — I debug and find the root cause • I focus on practical fixes, not overengineering • Clear communication and fast turnaround If you already have a system and something is not working — feel free to reach out.

Are you looking to elevate your online store to the next level? Look no further! I'm a seasoned Shopify developer with a passion for creating stunning, user-friendly e-commerce solutions. With over 8 years of experience in Shopify development, I specialize in crafting custom, high-converting online stores tailored to your unique business needs. What I Offer: - Custom Shopify Development: From building a brand new store from scratch to enhancing existing ones, I offer end-to-end Shopify development services. - Theme Customization: I'll transform your design ideas into reality by customizing Shopify themes to match your brand identity perfectly. - App Integration: Take advantage of Shopify's vast ecosystem by integrating powerful apps for enhanced functionality and seamless user experience. - Responsive Design: Your store will look stunning and function flawlessly across all devices, ensuring a smooth shopping experience for your customers. - Performance Optimization: I'll optimize your store for speed and performance, minimizing load times and maximizing conversions. Why Choose Me: - Proven Track Record: I've successfully delivered 100+ Shopify projects, earning rave reviews from satisfied clients. - Attention to Detail: I pay meticulous attention to every aspect of your project, ensuring pixel-perfect design and flawless functionality. - Effective Communication: I believe in transparent and timely communication, keeping you updated at every stage of the project. - Client Satisfaction Guaranteed: Your satisfaction is my top priority. I won't rest until you're 100% satisfied with the results. Let's Get Started: Ready to take your online store to new heights? Contact me today, and let's discuss how I can help bring your ecommerce vision to life!

═══ ⋆★⋆ Hey there! ⋆★⋆ ═══ Before anything else - I care about getting your project right. That means: • Actually listening to what you need • Asking the right questions upfront • Making sure we're aligned before any code gets written Clear communication and honest delivery. Whether you're a solo founder with a rough idea or a team with detailed specs, I’ll meet you where you are and turn your vision into something that works. ╭┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈╮ 💼 EXPERIENCE 5+ years of projects in: • Healthcare • Finance • Education • Management systems 🛠️ TECH STACK Frontend: • React • JavaScript • TypeScript • jQuery • Vue • TailwindCSS • NextJS I focus on building interfaces that are: ✔ Clean ✔ Maintainable ✔ Easy for the next developer to understand Full-stack: • C# • SQL • EntityFramework I build APIs, write efficient queries, and connect everything so features actually work end-to-end. ╰┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈╯ 🚀 WHAT I BRING ▸ Full-scale UI overhauls Rebuilding interfaces from the ground up (not just small tweaks) ▸ End-to-end feature development From React components → C# APIs → SQL queries ▸ Backend development (C#) REST APIs, data access, system integration ▸ SQL expertise Query writing + performance optimization ────────────────────────────────────────────── 📩 LET’S TALK If this sounds like what you're looking for, drop me a message.