Hire the Best UML Developers
in Ukraine

I'm a PHP and Python developer with 6+ years of experience. My passion is back-end programming. I like coding the software logic making all the 'magic' behind the curtains. Here is my shortlist of skills and experience. Python: - building chat-bost (Telegram, Discord, social networks) - making different web-scrapers - web-development and interacting directly with MySQL - building different analytics and working with cryptocurrency APIs PHP: - a full-stack web developer with 6+ years of CodeIgniter/WordPress/Opencart experience. - developed several websites and web applications (most of them are written from scratch, and others are based on such engines as Joomla and WordPress) - building WordPress themes and plugins - working with XenForo and developing plugins for the engine I always speak with the client during working on the project to get a clear understanding of his/her needs. My #1 goal will always be to meet your needs and deadline. Just let me know what you want and I'll help you bring your ideas to life. I'd like to find jobs that will allow me to grow as a professional. I want to build and architect applications, make sites on different frameworks and technologies, not only well-known CMSs like WordPress or Opencart (but I like and know them pretty well). Thank you in advance for your time and consideration. I look forward to working with you soon. My experience and skills full list - PHP 5.4/5.5/7 (+CodeIgniter, Symfony) - Python(2.7/3.6) (+Peewee, BeautifulSoup, Scrapy, Requests) - MySQL - Twitter bootstrap - Javascript/jQuery - Frameworks: CodeIgniter, Yii2 - CSS - UML - WordPress - Opencart - Joomla - XenForo - Web Scraping - Chatbots and integrating with social networks APIs - Integrating with cryptocurrency and e-money gateways

I am a highly skilled Umbraco, ASP.NET Core, and C# expert, ranking in the Top 1% for .NET/C# skills with 21 years of C# experience. I specialize in delivering fast websites with intuitive backends and pixel-perfect markup. Over my career, I've successfully completed 100+ projects on time and within budget for both large and small companies. Key Technologies: - Umbraco (Versions 15, v7-v14), Composing, Dashboards, Custom Property Editors, Custom Trees - Umbraco migration from 7 to latest, from 8 to latest, uSync, and upgrade expertise - Migrate from Wordpress to Umbraco - ASP.NET and ASP.NET Core - eCommerce platforms: Vendr, Stripe, uCommerce, Merchello - Umbraco Cloud (UaaS) and Azure - Integration of APIs: Facebook, Linkedin, Amadeus, Expedia, Mellowood, CourseStorm - Payment gateways: Stripe, MerchantWarrior, WorldPay, PayPal API, SagePay, GlobalPay - Databases: MSSQL, MySQL, PostgreSQL, Oracle - Frontend: HTML5, video integration, AngularJS, Tailwind CSS, Sass/Scss, Bootstrap, Zurb Foundation 6 - Version control: Git, SVN, GitHub, Bitbucket - Project management tools: Trello, Asana, Jira, Figma, PSD I excel in both collaborative large-team projects and independent work on smaller projects, requiring minimal supervision. My technical versatility and adaptability make me an ideal candidate for various projects in Umbraco, ASP.NET, C#, and related technologies.

Want smarter automation, better user engagement, and AI-powered growth? Send me your idea and I’ll break it down into a clear AI Chatbot Development strategy with quick wins and scalable long-term architecture. As your AI Chatbot Developer / AI Agent Developer, I’ll also explain how AI Chatbot Development drives business development and revenue 🤖 🔹 AI Engineer with 18+ years of programming experience (since 2006) 🔹 100+ chatbots / ai agent built as AI Agent Engineer resolving 70%+ of queries autonomously 🔹 Business-first mindset focused on ROI 🔹 Trusted AI Automation Specialist automating 50+ daily tasks / Automation Engineer saving 500+ hours/month for 100+ clients & 20+ startups 🔹 AI Agent Developer | AI Chatbot Developer | Telegram Bot Expert | Web Developer 🔹 Fast, clear communication & startup-friendly mindset I’m a senior engineer / ai agent developer / ai chatbot developer / agentic ai developer specializing in AI chatbot, AI platforms, AI solutions for Crypto and automation-driven businesses. My work focuses on building production-ready AI Chatbot (s), AI Agent (s), AI RAG, AI assistants, autonomous agents, Telegram trading bots, and crypto Telegram bots that scale securely and reliably. Whether you need website chats, voice AI agent, customer support automation, Telegram bots, Slack bots or advanced AI RAG systems, my approach ensures real business impact—not just demos. 🚀 AI Results I’ve Delivered • AI Chatbot Development of 100+ Python chatbots deployed across websites, Telegram, and Slack shipped across 30+ countries • 50+ AI Agent Development and bot development projects automating customer support and lead generation • 30+ AI workflow automation pipelines cutting manual processing time by 70%+ • Data Science and Data Analysis pipelines reducing human support workload by 60%+ • 30+ RAG, Neural Network and Natural Language Processing (NLP) solutions improving response accuracy by 40%+ • 15+ PyTorch and 4+ TensorFlow models trained and deployed to production • 30+ PHP and WordPress sites with custom AI chatbot and API integration over 10+ providers • 25+ Node.js and 12+ React and JavaScript projects handling 10,000+ concurrent users • Generative AI, Artificial Intelligence integrations raising user engagement by 45%+ • Machine Learning and Deep Learning architectures lifting AI prediction accuracy to 95%+ • 40+ Blockchain projects over 10+ DeFi, wallets, payment systems • AI sales agent and deal closer chatbots lifting conversion rates by 35%+ 📌 Full-Spectrum AI Chatbot Development Services • AI Agent Development, bot development and AI workflow automation • SaaS assistant • AI Agent Developer for startups and enterprises • AI RAG chatbot system for private data & SaaS • AI customer support & lead gerenation • Website chatbot, Slack bot & Voiceflow chatbot • Business automation and AI integration • Etsy marketing and Pinterest marketing • WordPress, API integration & admin dashboard • Blockchain & Web3 chatbot • Crypto / Blockchain Telegram trading bots • AI Agent automation & conversational workflow • Multi-agent & AI Agent Developer services • Practical deployments for customer support (Tidio) and lead generation (Conversiobot) Developer Stack • LangChain, LangGraph, CrewAI, AutoGen, OpenAI • Open AI chatbot, Claude, Gemini, GPT-3 & GPT-4 integrations • Flask, FastAPI, DialogFlow, ManyChat, Botpress • FAISS, Chroma, Pinecone, Weaviate, MySQL, PostgreSQL, MongoDB • Website chat, Telegram bot, WhatsApp chatbot, Slack & Discord bot • Python, PHP, JavaScript, Node.js & React 📈 Advanced AI Chatbot Development & AI Agent Development I don’t just “build bots” — I engineer intelligent systems. My AI Chatbot Developer process covers conversation design, model selection, AI Agent Development, and scalable backend architecture. Using LangChain, LangGraph, ai agent n8n, FastAPI, and modern AI pipelines, I've built 100+ AI Agents that reason, retrieve data, and execute workflows — as your expert AI Agent builder trusted by 50+ businesses and AI Agent creator with 70%+ autonomous query resolution. As a senior AI Chatbot Developer / AI Agent Developer, my focus is reliability, security, and measurable results for chatbot marketing and business automation. • For SaaS & AI platforms, I build AI RAG chatbot solutions that answer accurately from private data. • For startups, I provide MVP-focused AI Chatbot Development that scales smoothly. • For Crypto projects, I deliver chatbots integrated with smart contracts and payment systems. 📩 If you’re looking for a senior AI Chatbot Developer / AI Agent Developer specializing in AI Chatbot Development, AI RAG systems and conversion-focused AI Chatbot Developer solutions, let’s talk. I build intelligent systems that actually work — and scale.

My time is valuable, so you can expect short-term results when you choose me. I prefer to use developed components and solutions and determine the optimal solution for each client. I can handle all tasks, from front-end to Windows administration and backend development. ✔️ 9 times Umbraco MVP ✔️ Umbraco Certified ✔️ A super active member of the Umbraco Community ✔️ Contributor to Umbraco Core ✔️ Umbraco 10, Umbraco 9, Umbraco 8, Umbraco 7, Umbraco 4 Expert ✔️ Umbraco Cloud Expert ✔️ Umbraco Headless(Heartcore) Expert ✔️ Vendr specialist ✔️ C#, .NET, .NET Core, MVC, Web Forms, SQL, Web Services, Web APIs, Razor, Blazor, .NET Aspire ✔️ Wide experience in Angular JS, VueJS, jQuery, HTML5, CSS3 ✔️ AI-driven applications ✔️ Azure Machine Learning ✔️ Cognitive Services Skilled in integrating artificial intelligence solutions into websites and business operations, leveraging Azure's robust cloud services. Experienced in developing AI-driven applications that enhance user experience and streamline processes. Proficient in utilizing Azure Machine Learning, Cognitive Services, and other AI tools to create scalable and efficient solutions tailored to meet business needs.

📩 Available to start 𝗔𝗦𝗔𝗣 I am a results-driven QA Tester and experienced QA Engineer specializing in structured QA Manual processes and end-to-end Software QA Testing for web and cloud platforms. As a dedicated Web Tester, I deliver stable releases, reduce defects, and improve SDLC standards. I have worked as a qa tester, manual tester, and Manual QA tester, combining strong qa engineering discipline with practical qa testing and scalable qa software quality control. Over 5+ years and 50+ projects, I have performed full-cycle software testing — from requirements analysis to release approval. As both qa engineer and tester, I design structured qa manual testing frameworks and expand software qa testing coverage while maintaining precision as a web tester and website tester. I collaborate with full stack developer, project manager, and cross-functional teams to ensure reliable qa testing delivery. My expertise includes SaaS, ERP, CRM, and healthcare systems, including compliance-related environments and region-specific regulations projects. I have contributed to platforms requiring salesforce qa, ux qa, and enterprise-grade website testing validation. 🏆 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀 & 𝗣𝗿𝗼𝗳𝗲𝘀𝘀𝗶𝗼𝗻𝗮𝗹 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 •Edchart Certified Usability Testing Subject Matter Expert: Enhanced usability-driven software qa testing, advanced qa manual validation, and structured test analysis. As a qa engineer and qa tester, I apply risk-based qa testing and improve release confidence as a web tester. •Edchart Certified Manual Testing Subject Matter Expert Advanced specialization in qa manual, qa manual tester practices, and structured regression planning. Strengthened my role as software qa engineer manual specialist and delivery-focused qa tester ensuring scalable software qa testing cycles. •PMI – Agile & Predictive Project Management Improved collaboration with project manager teams, aligning sprint-based software testing with structured qa manual testing and long-term qa engineering governance. 𝗧𝗢𝗢𝗟𝗦 & 𝗧𝗘𝗖𝗛𝗡𝗢𝗟𝗢𝗚𝗜𝗘𝗦 📋 𝗧𝗲𝘀𝘁 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁: Jira, Confluence, ClickUp, Trello, TestRail, Qase Support structured qa manual, defect tracking, and transparent software qa testing processes led by a disciplined qa tester and qa engineer. 🌐 𝗪𝗲𝗯 & 𝗖𝗿𝗼𝘀𝘀-𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺 𝗩𝗮𝗹𝗶𝗱𝗮𝘁𝗶𝗼𝗻: BrowserStack, LambdaTest Professional website testing performed as a web tester and website tester, ensuring cross-browser reliability. 📱 𝗠𝗼𝗯𝗶𝗹𝗲 & 𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺 𝗧𝗲𝘀𝘁𝗶𝗻𝗴: Validation as a mobile app tester and an app tester to extend software qa testing coverage under structured qa manual testing standards. 🔌 𝗔𝗣𝗜 & 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 𝗩𝗮𝗹𝗶𝗱𝗮𝘁𝗶𝗼𝗻: Postman, SQL Backend logic verification, reporting checks, and data entry validation including manual data entry workflows. 🤝 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 𝗖𝗼𝗹𝗹𝗮𝗯𝗼𝗿𝗮𝘁𝗶𝗼𝗻: Work alongside qa automation engineer and automation tester teams to support scalable qa automation adoption while maintaining strong qa manual coverage and balanced software qa testing strategy. 𝗞𝗘𝗬 𝗣𝗥𝗢𝗝𝗘𝗖𝗧𝗦 🌍 WHO COVID Monitoring Service Delivered structured software qa testing and enterprise-level website testing as qa tester and qa engineer, ensuring production stability as web tester. 🇩🇰 Danish Government Housing Platform Performed large-scale qa testing, cross-browser validation, and regression cycles as qa tester, qa engineer, and website tester. 🏢 Enterprise ERP System Validated financial logic, documentation, and operational flows including collaboration with data analyst roles and ensuring compliance-related structures similar to user manual.. ❤️ Healthcare Donation Platform Executed secure transaction software testing, including home health qa validation and structured qa manual testing oversight. ☁️ SaaS & CRM Systems Worked on cloud platforms requiring salesforce qa, deep ux qa, and scalable software qa testing processes. 💪 𝗖𝗼𝗿𝗲 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 • Full-cycle Software QA Testing • Structured QA Manual and qa manual testing • Functional, regression, and exploratory qa testing • Cross-browser website testing as a web tester • API & database validation • Collaboration with qa automation, qa automation engineer, and hybrid teams • Scalable qa engineering frameworks My work as a QA Tester, qa tester, and strategic QA Engineer reduces production defects through disciplined qa manual execution and reliable software qa testing governance. If you need a reliable QA Tester, experienced QA Engineer, detail-oriented Web Tester, and structured QA Manual specialist delivering enterprise-level Software QA Testing, I am ready to contribute immediately. Let’s build software that performs flawlessly in real-world conditions!

ISTQB-certified manual QA engineer with 8+ years in software testing across web applications, mobile apps, and API products. ✅ 9+ years in manual QA and software testing. ✅ ISTQB Certified Tester since 2024 - the internationally recognized standard for QA professionals. ✅ Load testing with JMeter adds performance coverage beyond standard functional manual QA. ✅ 4,041 hours billed directly on Upwork across 9 contracts. ✅ 99% Job Success Score and Top Rated Plus. ✅ Manual testing and web testing delivered for SaaS platforms, healthcare, fintech, and e-commerce products. Part of Pecode, a Top Rated Plus Upwork agency with 8+ years on the platform, 306,000+ hours billed, 99% Job Success Score, and 150+ IT professionals across QA, frontend, mobile, and design. Pecode is recognized as a Top Software Testing Company in Eastern Europe. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHAT I DO ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Manual testing and web testing across web applications, mobile apps, and APIs. Full QA cycle from test plan to release sign-off: - Manual testing for new features and regression testing on every release - Web testing and web QA across all major browsers and screen sizes using Chrome DevTools and BrowserStack - Mobile app testing on iOS and Android - real devices and BrowserStack - API testing using Postman, Swagger, and proxy tools - Load testing and performance testing using JMeter - End-to-end testing covering full user journeys across web and mobile surfaces - Test case design and test suite management in TestRail - Bug reporting in Jira, Azure DevOps, and Confluence with clear reproduction steps, screenshots, severity labels, and expected vs actual behavior - Database QA and backend verification using SQL and MongoDB - Release sign-off with structured QA reports and test summaries - QA process setup for teams building their testing workflow from scratch Manual QA and web testing verticals I cover: SaaS platforms, healthcare products, fintech applications, e-commerce (including Magento), enterprise software running on Azure DevOps and Dynamics 365, and consumer mobile apps. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHO I WORK WITH ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Best fit for: - SaaS and B2B platforms preparing for releases or needing ongoing manual testing coverage - Healthcare, fintech, and e-commerce products where a bug in production costs real money - Mobile apps (iOS and Android) at any release stage needing a dedicated mobile tester - Enterprise products running on Azure DevOps or Dynamics 365 - Teams that need one accountable manual QA engineer, not a rotating pool of testers ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ HOW I WORK ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Week 1: I review your product, requirements, and existing test artifacts. I write a test plan covering scope, types of testing, environments, and priority bug areas. For web testing engagements this includes a browser and device coverage matrix. Week 2 onward: structured manual testing in your sprint cadence. Daily bug reports in your tracker. Regression testing after every release. API testing running in parallel with functional manual QA. Weekly QA summary reports for the engineering and product team. I ask before assuming and flag risks early. I overlap with EU and US business hours and respond within 4-8 hours during the working week. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ FREE QA AUDIT - START HERE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Share your staging URL and a brief on the riskiest area of your product. I will run a focused manual QA pass, log the first bugs I find with full reproduction steps and severity labels, and send back a sample bug report and a test plan outline within 48 hours - no cost, no obligation. It gives you a clear picture of the quality of my manual testing work before any contract starts. Not at the testing stage yet? Share your product brief and I will send back a recommended QA approach and test coverage plan tailored to your stack and release schedule.