Hire the Best JSON Developers
in Serbia

Excellence Without the Expense! I'm Dejan! I've been programming since 2002 and am also a certified railway engineer. I'm passionate about data management, process automation, and simplifying things. I excel at understanding client needs, setting clear goals, bringing fresh ideas, and delivering beyond expectations. Once I'm on a project, I ensure it's done right and to your satisfaction. 🟢What Clients Say About Me: - Proficient Expertise: Trusted in MS SQL and .NET. - Reliable Delivery: Projects delivered punctually. - Clear Communicator: Appreciated for timely and effective communication. - Client-Centric Approach: Tailoring solutions for unique client needs. - Always Accessible: Responsive, irrespective of time zones. - Quality Deliverables: Consistent excellence in output. - Quick Problem Solver: Swift in addressing challenges. - Above & Beyond: Going the extra mile for success. - Genuine Dedication: Prioritizing project excellence over financial gains. - Highly Endorsed: Frequently recommended by satisfied clients. I am Serbia based programmer with an extensive background in a variety of technologies. I speak English, Serbian and have all-time support in Vietnamese. 🟢My Technical Proficiency: - Desktop Development: Expert in C#, Visual Basic .Net, and Office Add-Ins. - Web Development: Skilled in PHP, HTML, JavaScript, CSS. - Database Mastery: Proficient in MSSQL, MySQL - from development to administration. - SEO: Unique strategies for optimizing search engine results. - Data Processing: Specializing in web scraping, parsing, data extraction, and automation. - Certifications: Proud Microsoft Certified Professional (MCP). I also offer VBA, Python, Classic ASP, VB6 services, and tasks like DNS setups, backups, web hosting administration, and more. 🕘Reach out between 9 AM and 6 PM CEDT (before 11 AM PDT | before 2 PM EDT | after 6 PM AEDT) and remember, good communication is key to everything! 🌍 Please search for me online: dejan dozet programmer Best Regards, Dejan Dozet

I’m a backend developer with 5+ years of experience working in a high-paced environment, focusing on building reliable data pipelines and monitoring solutions. I previously worked at a major quant firm, developing and maintaining critical infrastructure for data processing and system observability. I’ve also built a complete data pipeline and software solution for an accounting company, streamlining their workflow and automation. Now, after relocating, I’m back to freelancing and open to new projects. Expertise: ✅ Backend development with Node.js ✅ Designing and optimizing data pipelines ✅ Building scalable APIs and microservices ✅ System monitoring, alerting, and automation ✅ Database architecture (SQL & NoSQL) ✅ Cloud infrastructure & serverless solutions ✅ Frontend development with React & Vue I thrive on solving complex problems with structured, pragmatic solutions. I value clear communication, efficient execution, and delivering quality work within realistic deadlines. Let’s build something great together.

🚀 Delivered 16+ projects since 2019, AI integration since 2023. My clients get manual workflows replaced with automation and AI - up to 40% faster response, 20+ hours saved monthly. Glad to build yours next! 🔴 Backend Developer | Node.js | Python | TypeScript 🔴 Founder-led studio based in Belgrade, in-house team 🔴 12 years in IT consulting & business analysis 🔴 Thinking like a product owner, not just a coder 🔴 My clients return with new projects - that's how we measure quality CLICK MESSAGE to get a free mini-audit of your workflow 📩 My goal is simple: find what's eating your team's time and build the backend that replaces it - on time, on budget, with a 6-month warranty. 🎯 Need a Backend Developer who builds with Node.js, Python, and TypeScript? As a Backend Developer, I've built REST APIs, database architectures, automation backends, and data pipelines. Every Backend Developer project starts with discovery - we figure out what you actually need before code. Whether you need a Backend Developer for your API, a Python Developer for data pipelines, or a Node.js Developer for automation - you get a written spec, transparent budget, and weekly updates. WHAT I BUILD ➡️ BACKEND DEVELOPMENT As a Backend Developer, I build systems with Node.js, Python, and TypeScript. REST APIs, database design, authentication, webhooks, background jobs. Every Backend Developer project built for reliability. PostgreSQL, MongoDB, Docker, CI/CD. A Backend Developer who thinks like a product owner, not just a coder. ➡️ PYTHON DEVELOPMENT As a Python Developer, I build data pipelines, web scraping systems, ETL workflows, and automation backends. Selenium, Pandas, Google Sheets API. Every Python Developer project delivers structured output from messy inputs. Scheduled extraction, data processing, report generation. ➡️ NODE.JS DEVELOPMENT As a Node.js Developer, I build REST APIs, webhook handlers, automation backends, and SaaS platforms. Express, Koa, TypeScript. Every Node.js Developer project built with clean architecture and documentation. Payment integrations, multi-tenant systems, real-time processing. ➡️ AI INTEGRATION RAG systems, AI agents, GPT/Claude API - integrated into Node.js and Python backends. As a Backend Developer, I wire AI into your API. AI that answers from your data, never invents. Structured outputs, human-in-the-loop, anti-hallucination guardrails. ➡️ AUTOMATION Business process automation with Node.js and Python. Web scraping, data pipelines, report generation, scheduled tasks. Automation that replaces 10-20 hours of manual work per week. TECHNOLOGIES I USE: ➡️ BACKEND Node.js, Python, TypeScript, PostgreSQL, MongoDB, Docker, REST APIs, Webhooks, Koa, Express. Every Backend Developer tool needed for production systems. ➡️ AUTOMATION & SCRAPING Selenium, Playwright, Google Sheets API, Pandas, Apache POI, cron. Python and Node.js for data extraction and ETL pipelines. ➡️ AI & LLM OpenAI API, Claude API, RAG systems, AI agents, pgvector, prompt engineering. ➡️ DEPLOYMENT Docker, Nginx, CI/CD (GitHub Actions), VPS, Railway. DOMAINS & PRODUCTS I BUILD: SaaS backends, internal tools, admin panels, data pipelines, RAG chatbots, AI agents, workflow automation, web scraping platforms. My projects focus on measurable outcomes: 40% faster response times, 20+ hours saved monthly, 10+ hours saved weekly, zero lost leads. Technologies we bring to projects: Backend Developer, Node.js Developer, Python Developer, TypeScript Developer, API Developer, PostgreSQL Developer, MongoDB Developer, Docker Developer, AI Integration Developer, Automation Developer, Web Scraping Developer, Data Pipeline Developer, ETL Developer, Backend API Developer, Node.js Backend Developer, Python Backend Developer. MESSAGE me "BACKEND" and get a free mini-audit of your workflow 📩

I am a software developer with over 15 years of professional experience. I bring deep expertise in building and delivering complex systems, ranging from back-office applications to real-time processing of high-volume data.

I specialize in web scraping, workflow automation, and backend website management. If you need to extract data into clean formats, streamline your workflows with custom scripting, or need a reliable hand to manage your website or e-commerce store, I can help. ↘️ How I Can Help Your Business: 🔹 Web Scraping & Data Automation: I automate the extraction of unstructured web data, delivering it in clean, organized formats — whether you need standard Excel/CSV spreadsheets, Google Sheets, or JSON structures. I leverage tools and techniques such as advanced Regex, XPath, JSONPath, ParseHub — selecting the right approach to build a reliable pipeline for your project. 🔹 Custom Scripting & Workflows: Eliminating repetitive manual tasks and connecting apps using custom scripts (Python, JavaScript, Google Apps Script, VBA, PHP). 🔹 CMS & E-commerce Management: Handling the day-to-day operations of your online store or website (WordPress, Shopify, Sitecore), from product uploads to content formatting. 🔹 Deep Web Research: Gathering verified, structured information for lead generation, market analysis, or specialized datasets. 🎖 Proven Track Record: ✔ I have built and maintained scrapers for 250+ websites, powering the data pipelines for a global MBA-focused recruitment and career intelligence platform, and a car listings aggregator. ✔ For two years, I carried out daily CMS tasks for a technology website under tight deadlines, managing WordPress updates, content formatting, SEO backlinking, and web research. Under my management, the site reached #1 on Google. I bring structure and a proactive mindset to every project. If my expertise sounds like the right fit for your goals, drop me a line and we can get started 😀

Greetings, I'm a seasoned developer with over 2 years of commercial development experience, dedicated to constructing effective systems and solutions for businesses. My skill set includes proficiency in: Google Sheets/Google Apps Script Node.js/Typescript Express.js PostgreSQL (typically in conjunction with Sequelize.js) Additionally, I'm well-versed in front-end technologies such as HTML, CSS, and Bootstrap, enabling me to build custom web applications and straightforward landing pages. Feel free to reach out to me, and together, we can discover the perfect solution tailored just for you. Best regards, Aleksandr Ryzhov