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Hi, I don’t panic when production breaks. I make coffee, read the logs, and calmly ask the server what it’s feeling today. 👉 😄 Most of the time, it just wanted better architecture. I’m a full-stack developer who builds systems that survive real users, real traffic, and real-world requirements — not just demo day. My work focuses on clean backend design, automation, and scalable web applications that don’t slowly turn into mysterious legacy systems after three months. On the frontend, I work with React and Next.js. On the backend, I use Node.js, Laravel (PHP), and Python, usually paired with PostgreSQL and a strong belief that databases deserve respect. I specialize in turning complex business rules, spreadsheets, and “this worked in Excel” logic into reliable, automated systems. I also build web crawlers and automation tools using Puppeteer with incognito/headless browsing. This allows me to extract data from modern, JavaScript-heavy websites while avoiding fragile scrapers that break the moment someone changes a button color. Think stealthy, durable, and low-maintenance — like a well-trained ninja, but for browsers. Key Areas of Expertise ☑ Full-stack web development (React, Next.js, Node.js) ☑ Backend development with Laravel (PHP) and Python ☑ API design and integrations (REST, GraphQL) ☑ Secure authentication and authorization (OAuth, JWT, role-based access) ☑ Web crawling using Puppeteer with incognito/headless browsing ☑ Automation, schedulers, and background jobs that actually wake up on time ☑ Database design and optimization (PostgreSQL, indexes are not optional) ☑ Cloud infrastructure and deployments (AWS, optimized for sanity and cost) How I Work (After Years of Learning the Hard Way) ☑ I write code that future developers won’t angrily rewrite at midnight ☑ I automate repetitive work so humans can focus on thinking ☑ I design systems that are extendable, not “please don’t touch” fragile ☑ I explain technical decisions without turning meetings into lectures ☑ I document things because “I’ll remember later” is a lie I take my work seriously, but not myself. Software behaves better when it’s built with clarity, patience, and just enough humor to stay sane. If you need someone who can build solid backends, automate workflows, scrape data reliably, and keep things running long after launch — I’m your developer. Let’s build something reliable, scalable, and boring in the best possible way. Thanks

I build AI-powered web applications for clients who need the full stack - from async Python backends to slick React frontends. I have a feel for UX/UI, design, and how to improve products and make them more intuitive, as well as can manage complex processes and pipelines. I am currenlty working on an automated pricing and data-enrichment pipeline for a large-catalog e-commerce retailer (OpenAI Batch API, multi-API integrations, relational schema design, safety guardrails on live pricing logic, full test coverage). Other recent work includes an AI job-matching platform (OpenAI, Django, React, Docker) and a funded research tool integrating PubMed, Semantic Scholar and OpenAlex with LLM-assisted review (FastAPI, MongoDB, Google Document AI). I've also led full React migrations, built MVPs from Figma to production, and integrated OAuth2/OIDC auth flows. I like working on solutions together, bouncing off ideas, proposing solutions, and I will flag problems early and communicate clearly. Stack: Python (Django, FastAPI) · React/TypeScript · TanStack Query · Tailwind · shadcn/ui · PostgreSQL · MongoDB · Docker · OpenAI API · GitLab CI/CD

Specialize in building full-stack React + Supabase SaaS products with AI integrations, designed for startups that want to move fast and scale properly. To ship faster than most developers, I built two internal systems: 1. React + Node.js + Supabase SaaS Starter Production-ready Supabase architecture (Auth, Postgres, Realtime, Edge Functions) with React / Next.js or Node.js. It has Cursor AI rules in itself so if you want whole project vibe coded , it will still follow good code practice. Perfect for launching micro SaaS products in days instead of months. 2. Lovable → Next.js AI Converter Many founders build MVPs with Lovable, but hit SEO and scalability issues. I built an AI powered converter that transforms Lovable (React/Vite) components into clean Next.js architecture using AI workflows. This + using Cursor AI allows rapid MVP validation - proper React SaaS architecture without rewriting everything manually. ━━━━━━━━━━━━━━━━━━ **Experience** With 8+ years on Upwork, I’ve built and maintained SaaS platforms, Supabase systems, AI-powered applications, dashboards, and internal tools used in real production environments. Clients hire me when they need: A serious React SaaS developer A Supabase full stack expert An AI focused product engineer Someone who takes ownership and works independently Clear communication ━━━━━━━━━━━━━━━━━━ **What I Build (React + Supabase + AI Focus)** React SaaS MVPs powered by Supabase Full-stack Supabase applications AI-powered SaaS platforms (OpenAI integrations) Internal tools built with React + Supabase SaaS dashboards & product dashboards Customer portals & role-based systems Subscription-based React apps (Stripe + webhooks) Modern startup platforms using Next.js + Supabase AI-enhanced business automation tools ━━━━━━━━━━━━━━━━━━ ⭐⭐⭐⭐⭐ "We were very lucky to have come across Djordje, his skills, quality of work and his personality are second to none. Highly recommended !!!" ━━━━━━━━━━━━━━━━━━ **Tech stack:** Frontend: React (Server Components, Server Actions) Next.js (App Router, SSR, edge-ready apps) TypeScript (strict architecture) TailwindCSS (scalable design systems) TanStack Query Zustand Vite React Native + Expo Backend / Full-stack: Supabase (Postgres, Auth, Realtime, Edge Functions) Node.js Express FastAPI PostgreSQL REST APIs Webhooks Stripe integrations AI & Product Layer: OpenAI API AI-native UX Prompt engineering LLM integrations Cursor & AI-assisted workflows "Vibe coding" product iteration mindset Infrastructure: Vercel Docker AWS Google Cloud Testing: Jest React Testing Library Playwright Cypress ━━━━━━━━━━━━━━━━━━ **Why clients work with me:** Strong React + Supabase expertise Deep experience with Tailwind + modern UI systems Production-level TanStack usage Clear communication Independent ownership Startup speed with senior-level architecture Ready to launch your MVP? Invite me to your job post or message me to discuss your roadmap.

Next.js | React.js | Vue.js | Nuxt.js | Angular | TypeScript | GraphQL | Node.js | Nest.js | Java | Spring Boot | PostgreSQL | Supabase | MongoDB | PWA | Vercel 👋 Hello, world! 👨‍💻 I’m a versatile Full-Stack Software Engineer and SEO Specialist with 5+ years of experience in IT and marketing and expertise in building high-performance, scalable and SEO-optimized web applications and websites. With a deep understanding of modern frameworks and technologies, I create solutions that are both powerful and user-friendly. My focus is delivering clean, scalable code and actionable solutions that contribute directly to your business goals. 💻 Software Development Expertise: ✅ Frontend: React.js/Next.js, Vue.js/Nuxt.js, Angular, Tailwind CSS, TypeScript, GraphQL, PWA ✅ Backend: Node.js (Express.js, Nest.js, Socket.io), Java (Spring Boot) ✅ Database: PostgreSQL, MySQL, Supabase, Appwrite, MongoDB ✅ DevOps: Docker, GitHub Actions ✅ PaaS: Vercel, Netlify, Heroku ✅ CMS: WordPress (Elementor, Guttenberg), Strapi ✅ Some experience with: PHP (Laravel), Python (FastAPI, Flask) 📈 SEO & Web Performance Optimization: ✅ Technical SEO for improved rankings & visibility ✅ Page speed optimization (Core Web Vitals) ✅ Structured data, schema markup, and rich snippets ✅ SEO-friendly web development with optimized metadata and performance ✅ Ahrefs, SEMRush, Google Search Console (GSC) for SEO analysis and insights ✅ Google Analytics(GA4) & Google Tag Manager(GTM) setup for tracking & insights 💼 What You Get When Working With Me ⭐ Clean, maintainable, scalable code ⭐ UI/UX that feels fast and intuitive ⭐ SEO-optimized development from day one ⭐ Clear communication, documentation, and on-time delivery ⭐ A developer who understands both Software Engineering and Marketing 🚀 Let’s bring your ideas to life! 🙌

Network & IT Infrastructure Expert | Mikrotik | VPN | Linux | Cloud With 25 years of experience in IT infrastructure and network engineering, I specialize in designing, securing, and optimizing network systems for businesses of all sizes. Whether you need a reliable VPN solution, a secure network setup, or an optimized server infrastructure, I can help you achieve your goals efficiently. What I Offer: Mikrotik & Network Configuration – Routing, Firewall, VLANs, QoS, Wireless VPN & Secure Networking – WireGuard, OpenVPN, IPsec, GRE tunnels Linux System Administration – Ubuntu, CentOS, Debian, server automation Cloud & Backup Solutions – Veeam, Rsync, ZFS, Proxmox, Disaster Recovery Server & API Hosting – OpenStreetMap servers, self-hosted solutions Troubleshooting & Performance Optimization – Network monitoring, security hardening Web Development – Next.js websites, WordPress to Next.js migrations I have worked with businesses, startups, and enterprise clients to ensure their IT infrastructure is secure, scalable, and high-performing. My approach is straightforward – I analyze, optimize, and deliver solutions that just work. Let’s connect and discuss how I can help with your project!

Need a production-ready SaaS or MVP built fast and without technical debt? With 7+ years of Full Stack experience, I specialize in building scalable SaaS products and MVPs. My expertise is built on a strong Node.js foundation and extensive experience with Headless CMS architectures, allowing me to bridge the gap between complex backend logic and modern frontend performance. What I Can Do For You • Build or improve your web app (React / Next.js) • Set up or optimize your backend (Node.js / Supabase / PostgreSQL) • Fix bugs, optimize performance, or refactor code • Develop MVPs and prototypes quickly • Integrate external APIs or third-party services • Deploy apps to Vercel, Netlify, or custom hosting Why Clients Work With Me • Clear, simple communication • Predictable, organized workflow • Fast delivery and frequent updates • Clean, maintainable code that’s easy to continue building on Recent Work • Built and launched a production-ready nutrition tracking app (similar to MyFitnessPal) using React Native, Node.js, Supabase, and PostgreSQL • Developed multiple admin dashboards and internal tools (React, Next.js, Tailwind) • Created custom APIs and backend services (Node.js, REST, GraphQL) If you want a reliable developer who delivers results without drama, let’s talk.