Hire the Best Database Modeling Experts in Kyiv, UA

Expert Oracle & MySQL Database Developer | Query Optimization & API Integrations With 24+ years of experience in database development, I specialize in Oracle (PL/SQL), MySQL, and SQL query optimization to improve performance, scalability, and efficiency. I have helped businesses reduce query execution times by 80%, migrate databases seamlessly, and integrate complex APIs for high-volume data processing. 🔹 Key Expertise: ✅ Oracle PL/SQL, MySQL, SQL Performance Tuning ✅ Database Design, Optimization, and Refactoring ✅ ETL, Data Migration, API & Automation Integrations ✅ Custom Reports & Dashboards (Looker Studio, BI Tools) ✅ Enterprise-level Systems for Finance, eCommerce, and SaaS My clients have described my work as "fast and precise," "expert-level tuning," and "seamless data integration." I am available for both short-term consulting and long-term database development projects. Let’s optimize your database performance today!

Master of Computer Science with 25+ years experience. Database Development: Backend & Frontend, SQL, VBA. MS Access. Developing and supporting DB for Finance/Accountancy, DM, CRM, ERP, ETL etc. Full stack development using Angular, Golang and SQL (MySQL, Postgres, MS SQL; AWS). MS Office automation: Access/Exce/Word/Outlook. Macros, VBA, API integration. The key focus is to deliver time-saving, user friendly and easy to use applications.

🔥 Engineer that saves your time, ships fast, and pays off 🔥 🏆 10+ years of experience 🔥 60+ successfully delivered projects 💸 products generating $8,5M+ in revenue ⭐ Web app with 20,000+ active users I'm a Full Stack React Developer with 10+ years of production experience, delivering 60+ projects across SaaS, marketplaces, logistics, e-commerce, and Ops, with systems supporting 20K+ active users, 99.9% uptime, and millions of monthly requests. As a Senior React Developer and Frontend React, I shipped 50+ commercial products as a Full Stack Developer React Node, helping clients reach $8,2M+ revenue and reduce time-to-market by 30–40%. I work daily as a Full Stack React Developer and Frontend React Next.js developer, combining UI performance and backend architecture as a Full Stack Developer React Node and Frontend React developer, improving LCP/TTI by 2–3x, increasing conversion rates by 25–35%, and scaling apps to 100K+ MAU. My background as a Frontend React developer and Full Stack Developer React Node enables full ownership from UX design to scaling and post-launch optimisation. As a Full Stack React Developer, I’ve built SaaS platforms using Supabase and Supabase Postgres, implementing auth, RLS, and real-time systems handling 100K–300K events/day. I’ve used Supabase in 9+ production apps with Postgres, react next.js, react js, cutting backend costs by 40%, infra overhead by 35%, and delivery time by 30%. I'm a Full Stack Developer React Node with deep experience as a full stack developer Node.js developer , building APIs, real-time services, and dashboards processing 5M+ requests/month. As a Full Stack Developer React Node, I delivered CRM, logistics, and warehouse dashboards, plus B2C marketplaces with Stripe payments, automating 50–70% of manual workflows. On the frontend, I’ve worked the last 8+ years as Frontend React js and front end developer react. As frontend developer react, frontend react developer I focus on performance and conversion, reducing load times by 60%, bounce rates by 25%, and increasing engagement by 30–45%. I collaborate as a ux designer to turn UI improvements into measurable revenue growth. I am also a react native developer, shipping 5+ cross-platform apps for iOS and Android, supporting 50K+ active users, 99.8% uptime, and peak loads during live events. These apps powered logistics and energy-tech startups reaching £7M annual revenue. I’ve also delivered projects using Astro, Svelte, Python. As a web developer, full stack developer, and full stack react developer, I’ve built MERN stack systems as full stack developer react node, react redux, java react, and scalable APIs, deployed across multiple regions. I collaborated with distributed teams, including react developers Filipinos, reducing release cycles by 25% and production bugs by 30%. Payments and monetization are core strengths: I implemented stripe billing, subscriptions, and marketplaces generating $4,7M+ revenue as a frontend react developer, reducing checkout drop-off by 20–30% and increasing AOV by 15–25%. I build SEO-friendly SSR apps with react next.js and next.js firebase, achieving 90+ Lighthouse scores and 2–3x organic traffic growth using modern javascript optimizations as a Full Stack Developer React Node. Recent work includes large-scale dashboards, marketplaces, and PWAs built as a Full Stack React Developer, Frontend React, and Full Stack Developer React Node, using Claude Code for fast launches and custom React systems for core logic, saving teams 300–500 hours/month. My focus is always on clean architecture, measurable impact, and long-term maintainability. If you’re looking for a Full Stack React Developer, react js developer, react web developer, or node developer who delivers measurable results, I provide predictable delivery, business-focused decisions, and long-term ownership. 🛠 Additional Technical expertise - Launched 4+ apps as a mobile app developer / front end developer html, reaching 50K+ installs and 4.9 avg rating. - Deep experience with Supabase RLS policy and Supabase Auth across 7+ systems and 20+ roles. - Experience as a Python developer and senior full stack developer react node with Supabase on data-heavy platforms. - 30+ projects as full stack developer react node. - Full Stack Development work and 1200+ hours as full stack developer react node - LLM & AI integration, OpenAI, Gemini, Chat GPT, building AI-powered applications that reduced manual work by 30–50% as a frontend react next.js developer and node full stack developer - 8+ years as react js next js and 5+ years as react nextjs developer - 6+ years as a frontend next.js react developer - 5+ years as node.js developer, and backend nodejs engineer - 10 projects as a headless CMS front end developer and as front end developer angular. Let's begin the collaboration with Full stack React Developer by clicking "Invite" or "Hire" on the top right

I help businesses build reliable data platforms and AI-powered applications. With 10+ years of experience in SQL Server, PostgreSQL, C#, and database optimization, I develop solutions that combine high-performance databases with modern AI technologies. I can help you with: SQL query optimization and performance tuning Database design and data modeling ETL pipelines and data migration ASP.NET Core backend development AI integration using OpenAI-compatible APIs AI assistants that work with SQL databases and business documents Retrieval-Augmented Generation (RAG) Vector search with PostgreSQL (pgvector) REST APIs and backend services Stored procedures, functions, and triggers ETL and data migration SQL Server ↔ PostgreSQL ↔ Oracle migrations Power BI data preparation Building DWH (Medallion Architecture) Database troubleshooting and production support I focus on practical business solutions—whether it's optimizing a slow database, building a data platform, or integrating AI into an existing application. If you need someone who understands both databases and modern AI workflows, I'd be happy to discuss your project.

🏆 Top 3% of freelancers – Top Rated Plus, 100 JSS 💎 10+ years of experience as Python Fullstack Developer | Django Flask Developer | AI Chatbot and AI Agents Developer Expert ⭐ I’ve been building with Python long before it was trendy and can do anything – SaaS, Management Systems, custom web apps, API & AI Integrations, high-performance backend systems, web scraping tools and scalable web applications to help businesses automate operations, generate leads, and scale reliably. Why clients choose me? 🚀 10+ years as a python fullstack developer and Python backend engineer delivering production systems 🔥 Deep expertise in Python automation, data extraction, and custom web application development 🤖 Strong focus on AI agent development, chatbot development and AI integrations 🧠 Clean architecture, maintainable code, and long-term support mindset 🗣 Strong communication, clear technical explanations, reliable delivery and proactive progress updates 🎯 Business-oriented approach focused on ROI, efficiency, and measurable results Core Expertise ✅ Backend & Full Stack Development Scalable APIs and applications using Python Django, Flask, FastAPI, SQL, PostgreSQL, and Docker. Clean architecture, async processing, and secure backend development. ✅ CRM, ERP & Management Systems (LMS, EMS, WMS) ✅ SaaS Platforms & Marketplaces, E-commerce Developed SaaS and marketplace platforms as a python fullstack developer using Python Django REST, FastAPI, AWS, React, SQL, Elasticsearch. ✅ MVPs & Web Applications Delivered MVPs, dashboards, portals, landing pages, and ecommerce apps. ✅ Web Scraping, Automation & Bot Development Python web scraping and data extraction using Selenium, Scrapy, BeautifulSoup, with proxy rotation, CAPTCHA handling, and structured data parsing for business intelligence and data science. ✅ AI Development, AI Automation & Integration Delivered AI chatbot development and AI agent development using Python Django, FastAPI, ChatGPT API Integration, natural language processing, machine learning Python, deep learning, OCR, vector search, and async Python. Built AI document processing, AI content automation, and scalable backend AI workflows with full AI integration. ✅ API Development & Integration REST API development, API integration, OAuth, JWT, payment gateways, Google Maps API, Twilio, and third-party services. Reliable Python API layers for web and mobile systems. Projects I’m proud of: 🔹 E-Commerce Price Monitoring Bot Built as a python fullstack developer ✔ Automated price tracking for 500+ products across multiple marketplaces ✔ Supported dynamic repricing decisions, contributing to ~$180k annual revenue increase ✔ Google Sheets API and Telegram notifications for real-time alerts 🔹 AI-Powered Lead Generation Platform Python full stack and AI development project ✔ Automated B2B lead extraction with real-time enrichment ✔ Generated ~$320k in new pipeline revenue within the first year ✔ Reduced manual prospecting workload by 80% ✔ Built with Python automation, API integration, and AI workflows 🔹 Social Media Automation System Python automation and backend development ✔ Automated posting, commenting, and DMs across Instagram and Twitter ✔ Contributed to ~$95k in attributed sales revenue through consistent outreach ✔ Selenium automation with human-like behavior to avoid bans ✔ Python backend monitoring and task scheduling for stability How I work? 1️⃣ Discovery & Planning I define goals, backend architecture, Python full stack structure, AI integration, and API flow. 2️⃣ System Design Scalable backend logic, database modeling with PostgreSQL or MySQL, and clean API contracts. 3️⃣ Development As a python fullstack developer, I build systems using Python Django, Flask, FastAPI, JavaScript, React, SQL, Docker, and AI development tools. Strong focus on AI agent development, chatbot development, machine learning Python, and automation. 4️⃣ Optimization & Security Performance tuning, async processing, API rate limits, CAPTCHA handling, and backend security. 5️⃣ Deployment & Support Dockerized deployments, cloud-ready Python full stack apps, monitoring, and long-term support. Tech stack 🚀Languages: Python, JavaScript, TypeScript, SQL 🚀 Backend: Django, Flask, FastAPI, REST API, Backend Development 🚀 Frontend: React, Vue.js, Next.js, HTML5, CSS, JavaScript 🚀 Databases: PostgreSQL, MySQL, SQLite, MongoDB 🚀Automation: Python Automation, Web Scraping, Bots, AI Agents 🚀 DevOps: Docker, Git, Cloud Deployment If you’re looking for a python fullstack developer who understands AI, automation, backend systems, and business goals, I’m ready to help. 📩 Send me direct message or click Invite - I will walk you through similar Python full stack and AI 📆 Last Updated: 6/9/26

Are you looking for a reasonable PHP backend developer? Is your project on Laravel, Yii2, Symphony, Zend, or on any other PHP framework? Do you need help on Ruby, or on Python backend? You’re on the right way!👇🏼 My name is Oleg and I'm a BackEnd Developer (with PHP focus, but several coding languages are available) at one of the top dev firms in Ukraine in Kyiv as named by Clutch in 2020 🏆 About me: - 23+ years of experience in the field (Backend Development; various custom logic coding; many coding languages; analog coding - yeah, even that one) - Solid experience in the development of custom complex logic - Extensive experience in transforming models and flows into a working code - Database modeling - Tech Stack: PHP, Laravel, Yii2, Symphony, Zend, Ruby on Rails, Python - Segments: E-commerce, CRM, ERP, Shopware 5/6 - Development for me is not just a code, but a versatile business process for which I always tend to find the appropriate way of logic code implementation. As of now, I'm part of the Skynix team where I can fully dedicate myself to working with the complex logic tasks Skynix is a team of professionals focused on LAMP and JAM stacks. We deliver complex web and mobile applications development using PHP (Laravel, Yii2, Zend, or CMS systems like Magento or WordPress) and JavaScript (React, Vue, TypeScript, Ember). Why Skynix: - Providing development services starting from 2015 - 20+ team members (Senior 25%, Middle 45%, Junior 30%) and keep on growing - Only professional and enterprise-level of attitude - the project will be delivered, you can just enjoy the process - Great at remote work with various time zones - Our developers are good in English and learn skills extremely fast Need to empower your business? Let's work together!